Method, device, storage medium and clothes dryer for judging filter blockage of clothes dryer

Abstract

The present invention provides a method, device, storage medium, and dryer for determining filter clog in a clothes dryer. The method comprises the following steps: obtaining the dryer's fan current and ambient temperature; if the fan current is greater than a set current threshold, determining whether the rate of change of the fan current is greater than a set current rate threshold; if the rate of change of the fan current is less than the set current rate threshold, determining whether the ambient temperature is greater than a set temperature threshold; and if the ambient temperature is less than the temperature threshold, outputting a filter clog signal. Compared to the prior art, the present invention determines whether the dryer's air duct filter is clogged by eliminating the effects of fan failure and ambient temperature on the fan, resulting in a more accurate determination.

Description

Technical Field

[0001] The present invention relates to the technical field of clothes dryers, and in particular to a method and device for determining filter blockage of a clothes dryer, a storage medium, and a clothes dryer. Background Art

[0002] A filter is installed in the dryer's air duct to block debris such as lint, paper scraps, and dust from clothing, preventing them from affecting the dryer's operation. As the dryer runs longer, debris accumulates on the filter, increasing its resistance to airflow and affecting the dryer's operation. Therefore, the dryer's filter needs to be cleaned or replaced.

[0003] In the prior art, whether the filter is clogged is determined by measuring the wind pressure in the clean air duct. However, due to the structural characteristics of the dryer itself, the clean air duct is curved and short, so measuring the wind pressure in the clean air duct to determine whether the filter is clogged is not accurate. Summary of the Invention

[0004] Based on this, an object of the present invention is to provide a method, device, storage medium and dryer for determining whether the filter of the clothes dryer is clogged, so as to accurately determine whether the filter of the clothes dryer is clogged.

[0005] The method for determining filter blockage in a clothes dryer of the present invention comprises the following steps:

[0006] Obtaining the fan current and ambient temperature of the clothes dryer;

[0007] If the fan current is greater than the set current threshold, determining whether the rate of change of the fan current is greater than the set current change rate threshold;

[0008] If the rate of change of the fan current is less than the set current change rate threshold, determining whether the ambient temperature is greater than the set temperature threshold;

[0009] If the ambient temperature is lower than the temperature threshold, a filter blockage signal is output.

[0010] Furthermore, if the ambient temperature is greater than the temperature threshold, the method further includes the following steps:

[0011] Obtain the wind pressure in the fan cavity;

[0012] If the wind pressure is less than the set wind pressure threshold, a filter blockage signal is output.

[0013] Furthermore, if the ambient temperature is greater than the temperature threshold, the method further includes the following steps:

[0014] obtaining a first air pressure at an air outlet of an air duct of the clothes dryer;

[0015] Adjusting the operating gear of the fan according to a preset gear adjustment value;

[0016] Obtaining a second wind pressure at the air outlet of the air duct;

[0017] Obtaining a wind pressure difference between the first wind pressure and the second wind pressure;

[0018] If the wind pressure difference is less than the set wind pressure change threshold, a filter blockage signal is output.

[0019] Furthermore, adjusting the operating gear of the fan according to a preset gear adjustment value includes:

[0020] Increase the fan's operating gear.

[0021] Furthermore, if the wind turbine current is less than the current threshold, the method further includes the following steps:

[0022] Obtaining a current remaining filter life value according to the fan current, the ambient temperature, and a previously established correspondence between the remaining filter life and the fan current and the ambient temperature;

[0023] Output the remaining filter life value.

[0024] Furthermore, the method further comprises the following steps:

[0025] If the ambient temperature is greater than the ambient temperature threshold, an abnormal ambient temperature signal is output.

[0026] Furthermore, the method further comprises the following steps:

[0027] If the change rate of the fan current is greater than the current change rate threshold, a fan fault signal is output.

[0028] The device for determining whether a filter screen of a clothes dryer is clogged provided by the present invention comprises:

[0029] A fan current and ambient temperature acquisition module, configured to acquire the fan current and ambient temperature of the clothes dryer;

[0030] a current change rate threshold judgment module, configured to judge whether the change rate of the fan current is greater than the set current change rate threshold if the fan current is greater than the set current threshold;

[0031] an ambient temperature threshold judgment module, configured to judge whether the ambient temperature is greater than a set temperature threshold if the rate of change of the fan current is less than a set current change rate threshold;

[0032] The filter clogging signal output module is used to output a filter clogging signal when the ambient temperature is lower than a set temperature threshold.

[0033] The storage medium provided by the present invention stores a computer program, which, when executed by a processor, is used to implement the steps of the above-mentioned method for determining filter clogging of a clothes dryer.

[0034] The clothes dryer provided by the present invention includes at least one memory and at least one processor, wherein the memory is used to store one or more programs; when the one or more programs are executed by the at least one processor, the at least one processor implements the steps of the above-mentioned method for determining filter blockage of the clothes dryer.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. By eliminating fan failure and the influence of ambient temperature on the fan, it is possible to determine whether the filter of the dryer air duct is clogged, which will increase the accuracy of the judgment.

[0037] 2. The wind pressure in the fan cavity is used to determine whether the ambient temperature is too high and the filter is blocked at the same time, so as to prevent the filter from being blocked when the ambient temperature is too high and the filter is blocked at the same time, and to prevent the filter from being blocked.

[0038] 3. The current remaining filter life value is obtained based on the fan current, ambient temperature and the previously established correspondence between the remaining filter life and the fan current and ambient temperature, and the remaining filter life value is output to facilitate on-site personnel to reasonably plan the time for filter cleaning and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a flow chart of a method for determining filter clogging in a clothes dryer according to an embodiment of the present invention;

[0040] Figure 2 Schematic diagram of the wind turbine current variation trend in one embodiment of the present invention;

[0041] Figure 3 is a flow chart of a method for determining filter clogging in a clothes dryer according to another embodiment of the present invention;

[0042] Figure 4 Schematic diagram of the structure of a device for determining whether a filter of a clothes dryer is clogged in one embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0044] It should be clear that the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present application.

[0045] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. The singular forms "a," "the," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0046] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0047] In addition, in this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0048] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

[0049] The present invention provides a method for determining filter blockage in a clothes dryer. Figure 1 As shown, the following steps are included:

[0050] S101: Obtaining the fan current and ambient temperature of the clothes dryer;

[0051] S102: If the fan current is greater than a set current threshold, determining whether a change rate of the fan current is greater than a set current change rate threshold;

[0052] S103: If the change rate of the fan current is less than the set current change rate threshold, determining whether the ambient temperature is greater than a set temperature threshold;

[0053] S104: If the ambient temperature is lower than the temperature threshold, output a filter clogging signal.

[0054] When the filter of the dryer is clogged, the static pressure of the fan duct will increase. In order to maintain a constant air volume, the fan motor will increase the speed to maintain a constant air volume, which will cause the fan current to increase.

[0055] Because clothes dryers are typically located in a closed indoor environment, they can't effectively dissipate heat from the outside air. Furthermore, the fan is located inside the dryer housing. Therefore, the temperature of the environment surrounding the dryer increases as the dryer operates. This increased indoor temperature reacts on the fan, increasing the resistance of the fan's internal coils. This increased coil resistance increases the fan's current in order to maintain a constant air volume.

[0056] In addition, when the fan fails, such as a short circuit, the fan current will also increase.

[0057] Therefore, it is necessary to identify and distinguish the various causes of increased fan current in order to accurately determine whether the filter is blocked through the fan current.

[0058] like Figure 2 As shown in the figure, the horizontal axis t is the operating time, the vertical axis I is the fan current, L is the current threshold, S1 is the fan current change trend when the filter is clogged or the ambient temperature is elevated, and S2 is the fan current change trend when the fan fails. Filter clogs and rising ambient temperatures are both slow processes. If the filter is clogged or the ambient temperature is too high, the fan current will slowly rise to exceed the set current threshold. Fan failures, on the other hand, usually occur suddenly. If a fan fails, the fan current will quickly rise to exceed the set current threshold.

[0059] Therefore, the first thing to do is to determine whether the fan current is rising rapidly or slowly to exceed the threshold. If the rate of change of the fan current is less than the set current change rate threshold, it indicates that the fan current is rising slowly, and the possibility of fan failure can be ruled out. The fan current exceeding the set current threshold may be caused by filter blockage, excessive ambient temperature, or a combination of filter blockage and excessive ambient temperature. If the rate of change of the fan current is greater than the set current change rate threshold, it indicates that the fan current is rising rapidly and the fan has failed.

[0060] In one optional embodiment, the fan current change rate K = the current change value ΔI per unit time Δt / unit time Δt. The fan current change rate K is compared with a set current change rate threshold X1. If the current change rate K exceeds the current change rate threshold X1, it indicates that the fan current is rising rapidly. If the current change rate threshold K does not exceed the current change rate threshold X1, it indicates that the fan current is rising slowly. In other embodiments, a threshold X2 for the current change value ΔI per unit time Δt may also be pre-set. The current change value ΔI per unit time Δt is compared with the current change value threshold X2. If the current change value ΔI exceeds the current change value threshold X2, it indicates that the fan current is rising rapidly. If the current change value ΔI does not exceed the current change value threshold X2, it indicates that the fan current is rising slowly.

[0061] To further distinguish whether the fan current exceeding the set current threshold is caused by a clogged filter or excessively high ambient temperature, it is also necessary to determine whether the ambient temperature is too high. If the ambient temperature is below the set temperature threshold, the possibility of excessively high ambient temperature causing the fan current exceeding the threshold can be ruled out, and the fan current exceeding the threshold is solely caused by a clogged filter.

[0062] In this embodiment, the dryer filter clogged detection method first obtains the dryer's fan current and ambient temperature. If the fan current is greater than a set current threshold, the fan current rate of change is less than a set current rate of change threshold, and the ambient temperature is less than a set temperature threshold, the filter is clogged. A filter clog signal is then output, indicating that the filter needs to be replaced or cleaned. The filter clog signal can be output to a device such as an indicator light or alarm to remind on-site personnel to replace or clean the filter.

[0063] In a preferred embodiment, if the ambient temperature is greater than a set temperature threshold, the method further includes the following steps:

[0064] S105: Obtaining wind pressure in the fan cavity;

[0065] S106: If the wind pressure is less than the set wind pressure threshold, a filter blockage signal is output.

[0066] When the ambient temperature is greater than the set temperature threshold, it is possible that the fan current exceeds the set current threshold due to the high ambient temperature alone, or it may be caused by the combined effect of the high ambient temperature and filter blockage. Therefore, further differentiation is required.

[0067] In this embodiment, the wind pressure in the fan cavity is first obtained, and then the wind pressure in the fan cavity is compared with the set wind pressure value. If the wind pressure in the fan cavity is less than the set wind pressure threshold, the possibility that the fan current exceeds the set current threshold due to the high ambient temperature alone is excluded. The fan current exceeds the set current threshold due to the combined effect of the high ambient temperature and the filter blockage, and a filter blockage signal is output at this time.

[0068] In a preferred embodiment, if the ambient temperature is greater than a set temperature threshold, the method further includes the following steps:

[0069] S107: Obtaining a first air pressure at an air outlet of the air duct of the clothes dryer;

[0070] S108: adjusting the operating gear of the fan according to a preset gear adjustment value;

[0071] S109: Obtaining a second wind pressure at the air outlet of the air duct;

[0072] S110: Obtaining a wind pressure difference between the first wind pressure and the second wind pressure;

[0073] S111: If the wind pressure difference is less than the set wind pressure change threshold, a filter blockage signal is output.

[0074] When the ambient temperature is greater than the set temperature threshold, it is possible that the fan current exceeds the set current threshold due to the high ambient temperature alone, or it may be caused by the combined effect of the high ambient temperature and filter blockage. Therefore, further differentiation is required.

[0075] In this embodiment, when the ambient temperature is greater than the set temperature threshold, the operating gear of the fan is adjusted according to the preset gear adjustment value, and the first wind pressure at the air duct outlet before the gear adjustment and the second wind pressure after the gear adjustment are obtained respectively, and then the wind pressure difference between the first wind pressure and the second wind pressure is calculated. If the wind pressure difference is less than the set wind pressure change threshold, it indicates that the filter is blocked and the wind pressure loss is too large. The possibility that the fan current exceeds the set current threshold due to the high ambient temperature alone can be ruled out. The fan current exceeds the set current threshold due to the combined effect of the high ambient temperature and the filter blockage, and the filter blockage signal is output at this time.

[0076] In a preferred embodiment, in order to make the measurement of wind pressure more accurate, the above-mentioned step S108 is to increase the operating gear of the fan, obtain the first wind pressure at the air duct outlet before the gear adjustment and the second wind pressure after the gear adjustment, and then calculate the wind pressure difference between the first wind pressure and the second wind pressure. If the wind pressure difference is less than the set wind pressure change threshold, it indicates that the filter is clogged, resulting in excessive wind pressure loss.

[0077] In other embodiments, the fan may have already reached its rated maximum gear, and increasing the gear may damage the fan. When the fan has reached its rated maximum gear, step S108 is to reduce the fan's operating gear, obtain the first wind pressure at the air duct outlet before the gear adjustment and the second wind pressure after the gear adjustment, and then calculate the wind pressure difference between the first wind pressure and the second wind pressure. If the wind pressure difference is less than the set wind pressure change threshold, it indicates that the filter is clogged, resulting in excessive wind pressure loss.

[0078] In a preferred embodiment, if the wind turbine current is less than the current threshold, the following steps are further included:

[0079] S112: Obtaining a current remaining filter life value according to the fan current, the ambient temperature, and a previously established correspondence between the remaining filter life and the fan current and the ambient temperature;

[0080] S113: Output the remaining filter life value.

[0081] When the fan is operating normally, the higher the ambient temperature, the greater the fan current; the more severe the filter blockage, the shorter the remaining filter life value, and the greater the fan current; therefore, a relationship can be established among the ambient temperature, the remaining filter life value, and the fan current. When the dryer is in operation, the filter life cannot be directly measured, but the ambient temperature and the fan current are easily measured; therefore, in this embodiment, the current remaining filter life value can be obtained based on the fan current, ambient temperature, and the pre-established correspondence between the remaining filter life and the fan current and ambient temperature, and the remaining filter life value is output to inform on-site personnel of the current remaining filter life value, so as to facilitate planning the time for cleaning or replacing the filter. Specifically, the remaining filter life value can be output to a display.

[0082] In a preferred embodiment, the following steps are also included:

[0083] S114: If the ambient temperature is greater than the temperature threshold, output an abnormal ambient temperature signal.

[0084] When the ambient temperature is greater than the set temperature threshold, an abnormal ambient temperature signal is output to remind on-site personnel that the current ambient temperature is too high and the ambient temperature needs to be lowered to ensure the normal operation of the dryer.

[0085] In a preferred embodiment, the following steps are also included:

[0086] S115: If the change rate of the fan current is greater than the current change rate threshold, output a fan fault signal.

[0087] When the rate of change of the fan current is greater than the set current change threshold, it indicates that the fan has failed. At this time, a fan failure signal is output to remind on-site personnel to deal with the fan failure in time.

[0088] In another embodiment, Figure 3 As shown, the method for determining whether the filter of a clothes dryer is clogged includes the following steps:

[0089] S301: Obtain the fan current and ambient temperature of the clothes dryer;

[0090] S302: Compare the fan current with a set current threshold;

[0091] S303: If the fan current does not reach the set current threshold in step S302, then step S301 is repeated;

[0092] S304: If the fan current does not reach the set current threshold in step S302, the current remaining filter life value is obtained based on the fan current, the ambient temperature, and the previously established correspondence between the remaining filter life, the fan current, and the ambient temperature;

[0093] S305: Outputting the remaining filter life value obtained in step S304;

[0094] S306: If the fan current reaches the set current threshold in step S302, then the rate of change of the fan current is compared with the set current rate of change threshold;

[0095] S307: If the change rate of the fan current reaches the set current change rate threshold in step S306, a fan fault signal is output;

[0096] S308: If the rate of change of the fan current does not reach the set current rate of change threshold in step S306, then the ambient temperature is compared with the set temperature threshold;

[0097] S309: If the ambient temperature does not reach the set temperature threshold in step S308, a filter blockage signal is output;

[0098] S310: If the ambient temperature reaches the set temperature threshold in step S308, an abnormal ambient temperature signal is output;

[0099] S311: If the ambient temperature reaches the set temperature threshold in step S308, the wind pressure in the fan cavity is obtained;

[0100] S312: Compare the wind pressure in the fan cavity with a set wind pressure threshold;

[0101] S313: If the wind pressure in the fan cavity is lower than the set wind pressure threshold, a filter blockage signal is output;

[0102] S314: If the ambient temperature reaches the set temperature threshold in step S308, adjust the gear of the fan;

[0103] S315: Obtaining the wind pressure difference before and after the fan gear adjustment in step S314;

[0104] S316: Compare the wind pressure difference value obtained in step S315 with the set wind pressure change threshold;

[0105] S317: If the wind pressure difference does not reach the set wind pressure change threshold, a filter blockage signal is output.

[0106] In a second aspect, the present invention further provides a device 400 for determining whether a filter screen of a clothes dryer is clogged. Figure 4 As shown, the device includes:

[0107] A fan current and ambient temperature acquisition module 401 is used to acquire the fan current and ambient temperature of the clothes dryer;

[0108] a current change rate threshold judgment module 402, configured to judge whether the change rate of the fan current is greater than a set current change rate threshold if the fan current is greater than a set current change rate threshold;

[0109] The ambient temperature threshold judgment module 403 is configured to judge whether the ambient temperature is greater than a set temperature threshold if the rate of change of the wind turbine current is less than a set current change rate threshold;

[0110] The filter clogging signal output module 404 is configured to output a filter clogging signal when the ambient temperature is lower than a set temperature threshold.

[0111] In a preferred embodiment, the device further comprises:

[0112] The wind pressure acquisition module in the fan cavity is used to obtain the wind pressure in the fan cavity.

[0113] The filter clogging signal output module 404 is further configured to output a filter clogging signal when the wind pressure in the fan cavity is less than a set wind pressure threshold.

[0114] In a preferred embodiment, the device further comprises:

[0115] a first wind pressure acquisition module, configured to acquire a first wind pressure at an air outlet of the air duct of the clothes dryer before the fan is adjusted in gear;

[0116] A fan gear adjustment module, used to adjust the operating gear of the fan according to a preset gear adjustment value;

[0117] a second wind pressure acquisition module, configured to acquire a second wind pressure at the air outlet of the air duct of the clothes dryer after the fan is adjusted in gear;

[0118] The wind pressure difference acquisition module is used to obtain the wind pressure difference between the first wind pressure and the second wind pressure.

[0119] The filter clogging signal output module 404 is further configured to output a filter clogging signal when the wind pressure difference is less than a set wind pressure change threshold.

[0120] In a preferred embodiment, the device further comprises:

[0121] The filter remaining life value acquisition module is used to obtain the current filter remaining life value based on the fan current, ambient temperature and the previously established correspondence between the filter remaining life and the fan current and ambient temperature;

[0122] The filter life value output module is used to output the obtained filter life value.

[0123] In a preferred embodiment, the device further comprises:

[0124] The ambient temperature abnormality signal output module is used to output an ambient temperature abnormality signal when the ambient temperature is greater than a set ambient temperature threshold.

[0125] In a preferred embodiment, the device further comprises:

[0126] The fan fault signal output module is used to output a fan fault signal when the change rate of the fan current is greater than the set current change rate threshold.

[0127] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to the partial description of the method embodiments. The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0128] In a third aspect, the present invention further provides a storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for determining filter clogging of a clothes dryer.

[0129] In a fourth aspect, the present invention further provides a clothes dryer comprising at least one memory and at least one processor, wherein the memory is configured to store one or more programs; when the one or more programs are executed by the at least one processor, the at least one processor implements the steps of the above-described method for determining filter blockage in a clothes dryer.

[0130] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to the partial description of the method embodiments. The device embodiments described above are merely illustrative, wherein the components described as separate parts may or may not be physically separated, and the parts displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution. A person of ordinary skill in the art can understand and implement it without expending creative work.

[0131] Compared with the prior art, the present invention has the following beneficial effects:

[0132] 1. By eliminating fan failure and the influence of ambient temperature on the fan, it is possible to determine whether the filter of the dryer air duct is clogged, with higher judgment accuracy;

[0133] 2. The wind pressure in the fan cavity is used to determine whether the ambient temperature is too high and the filter is blocked at the same time, so as to prevent the filter from being blocked when the ambient temperature is too high and the filter is blocked at the same time, and to prevent the filter from being blocked.

[0134] 3. The current remaining filter life value is obtained based on the fan current, ambient temperature and the previously established correspondence between the remaining filter life and the fan current and ambient temperature, and the remaining filter life value is output to facilitate on-site personnel to reasonably plan the time for filter cleaning and replacement.

[0135] The above-described embodiments merely represent several implementation methods of the embodiments of the present application. Although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent of the embodiments of the present application. It should be noted that a person skilled in the art may make several variations and improvements without departing from the concept of the embodiments of the present application, and these variations and improvements fall within the scope of protection of the embodiments of the present application.

Claims

1. A method for determining filter blockage in a clothes dryer, characterized in that: The following steps are involved: Obtaining the fan current and ambient temperature of the clothes dryer; If the fan current is greater than the set current threshold, determining whether the rate of change of the fan current is greater than the set current change rate threshold; If the rate of change of the fan current is less than the set current change rate threshold, determining whether the ambient temperature is greater than the set temperature threshold; If the ambient temperature is lower than the temperature threshold, a filter blockage signal is output; If the ambient temperature is greater than the temperature threshold, the following steps are included: obtaining a first air pressure at an air outlet of an air duct of the clothes dryer; Adjusting the operating gear of the fan according to a preset gear adjustment value; Obtaining a second wind pressure at the air outlet of the air duct; Obtaining a wind pressure difference between the first wind pressure and the second wind pressure; If the wind pressure difference is less than the set wind pressure change threshold, a filter blockage signal is output.

2. The method for determining filter blockage in a clothes dryer according to claim 1, wherein: If the ambient temperature is greater than the temperature threshold, the method further comprises the following steps: Obtain the wind pressure in the fan cavity; If the wind pressure is less than the set wind pressure threshold, a filter blockage signal is output.

3. The method for determining filter blockage in a clothes dryer according to claim 2, wherein: Adjusting the operating gear of the fan according to a preset gear adjustment value includes: Increase the fan's operating gear.

4. The method for determining filter blockage in a clothes dryer according to claim 1, wherein: If the wind turbine current is less than the current threshold, the method further includes the following steps: Obtaining a current remaining filter life value according to the fan current, the ambient temperature, and a previously established correspondence between the remaining filter life and the fan current and the ambient temperature; Output the remaining filter life value.

5. The method for determining filter blockage in a clothes dryer according to claim 1, wherein: The following steps are also included: If the ambient temperature is greater than the ambient temperature threshold, an abnormal ambient temperature signal is output.

6. The method for determining filter blockage in a clothes dryer according to claim 1, wherein: If the change rate of the fan current is greater than the current change rate threshold, a fan fault signal is output.

7. A device for determining whether a filter screen of a clothes dryer is clogged, characterized in that: include: A fan current and ambient temperature acquisition module, configured to acquire the fan current and ambient temperature of the clothes dryer; a current change rate threshold judgment module, configured to judge whether the change rate of the fan current is greater than the set current change rate threshold if the fan current is greater than the set current threshold; an ambient temperature threshold judgment module, configured to judge whether the ambient temperature is greater than a set temperature threshold if the rate of change of the fan current is less than a set current change rate threshold; An abnormal ambient temperature signal output module is used to output an abnormal ambient temperature signal when the ambient temperature is greater than a set ambient temperature threshold; a first wind pressure acquisition module, configured to acquire a first wind pressure at an air outlet of the air duct of the clothes dryer before the fan is adjusted in gear; A fan gear adjustment module, used to adjust the operating gear of the fan according to a preset gear adjustment value; a second wind pressure acquisition module, configured to acquire a second wind pressure at the air outlet of the air duct of the clothes dryer after the fan is adjusted in gear; A wind pressure difference acquisition module, configured to acquire a wind pressure difference between a first wind pressure and a second wind pressure; The filter blockage signal output module is used to output a filter blockage signal when the ambient temperature is lower than the set temperature threshold; and output a filter blockage signal when the wind pressure difference is lower than the set wind pressure change threshold.

8. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, it is used to implement the steps of the method for determining filter clogging of a clothes dryer according to any one of claims 1 to 6.

9. A clothes dryer, characterized in that: include: at least one memory and at least one processor; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the at least one processor implements the steps of the method according to any one of claims 1 to 6.

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