Fresh air machine and control method thereof

Abstract

This application relates to a fresh air ventilator and its control method. The fresh air ventilator includes a housing with an air inlet and an air outlet, forming a fresh air channel between the air inlet and the air outlet; a filter is disposed within the fresh air channel; and an interception device is disposed between the air inlet and the filter. The interception device includes a door frame and a filter baffle that can be opened and closed relative to the door frame. When the filter baffle is in the open state, fresh air from outside is introduced into the filter from the air inlet through the door frame. When the filter baffle is in the closed state, large particles of foreign matter are intercepted and broken up by the filter baffle, and fresh air from outside is introduced into the filter from the air inlet through the top of the interception device. This fresh air ventilator can intercept and break up large particles of impurities upstream of the filter, preventing the filter from becoming clogged or even damaged, and extending the filter's service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a fresh air machine and a control method thereof. BACKGROUND

[0002] The fresh air machines sold on the market at present are all installed with fixed filters. When sudden severe environments such as wind sand and sandstorm occur, the fixed filters may be blocked and fail to filter due to too many particulate matters and existence of light and large-area sundries, and are easily damaged. SUMMARY

[0003] The present application aims to provide a fresh air machine and a control method thereof, which can intercept and crush large-particle sundries upstream of a filter, prevent the filter from being blocked and even damaged, and prolong the service life of the filter.

[0004] In a first aspect, an embodiment of the present application provides a fresh air machine, comprising:

[0005] a housing having an air inlet and an air outlet, a fresh air channel being formed between the air inlet and the air outlet;

[0006] a filter arranged in the fresh air channel;

[0007] an interception device arranged between the air inlet and the filter, the interception device comprising a door frame and a filter baffle openable and closable relative to the door frame;

[0008] When the filter baffle is in an open state, external fresh air is introduced from the air inlet to the filter via the door frame; when the filter baffle is in a closed state, external large-particle sundries are intercepted and crushed by the filter baffle, and external fresh air is introduced from the air inlet to the filter via an upper portion of the interception device.

[0009] In a possible implementation manner, the filter baffle comprises a baffle body and a high-voltage electric release device embedded in the baffle body, and the high-voltage electric release device crushes the large-particle sundries by releasing high-voltage electricity.

[0010] In a possible implementation manner, the fresh air machine further comprises an environment sensor arranged on one side of the air inlet, configured to sense an environmental condition of the outside and send a first electric signal when the environmental condition is severe, and the interception device closes the filter baffle according to the first electric signal.

[0011] In a possible implementation manner, the fresh air machine further comprises a sundry identification sensor arranged at a bottom of the door frame, configured to send a second electric signal when large-particle sundries exist at the filter baffle, and the interception device controls the high-voltage electric release device to release high-voltage electricity to crush the large-particle sundries according to the second electric signal.

[0012] In a possible implementation, the interception device further comprises a driving motor, the filter baffle is rotatably connected to the door frame through a rotating shaft, and an output end of the driving motor is connected to the rotating shaft to drive the filter baffle to open or close relative to the door frame.

[0013] In a possible implementation, the filter comprises one of an activated carbon filter membrane, a PM10 filter membrane, a PM2.5 filter membrane, and an electrostatic dust removal module, or a combination of at least two thereof.

[0014] In a second aspect, an embodiment of the present application provides a control method of a fresh air machine, comprising:

[0015] monitoring whether the external weather is severe weather;

[0016] If yes, controlling a filter baffle of the interception device to close, so that external fresh air is introduced from the air inlet to the filter via the top of the interception device.

[0017] monitoring whether there is a large-particle foreign matter at the filter baffle;

[0018] If yes, controlling the filter baffle to crush the large-particle foreign matter.

[0019] In a possible implementation, the filter baffle comprises a baffle body and a high-voltage electric release device embedded in the baffle body, and the controlling the filter baffle to crush the large-particle foreign matter comprises:

[0020] controlling the high-voltage electric release device to release high-voltage electricity to crush the large-particle foreign matter.

[0021] In a possible implementation, the method further comprises:

[0022] If no large-particle foreign matter is monitored at the filter baffle within a preset time length, controlling the filter baffle to open, so that the external fresh air is introduced from the air inlet to the filter via the door frame.

[0023] In a possible implementation, the method further comprises:

[0024] If the external weather is non-severe weather, controlling the filter baffle of the interception device to open, so that the external fresh air is introduced from the air inlet to the filter via the door frame.

[0025] The fresh air machine and the control method thereof provided by the embodiments of the present application, by setting an intercepting device between the air inlet of the shell and the filter, the intercepting device comprising a door frame and a filter baffle openable relative to the door frame, when the filter baffle is in the closed state, the external large-particle foreign matters are intercepted and broken by the filter baffle, and the external fresh air is introduced from the air inlet to the filter via the upper part of the intercepting device; when the filter baffle is in the open state, the external fresh air is introduced from the air inlet to the filter via the door frame, so that when facing large and light foreign matters in a harsh environment, the large-particle impurities can be intercepted and broken in the upstream of the filter, at the same time, the air direction is changed to allow the air carrying small-particle impurities to enter the filter, preventing the filter from being blocked or even damaged, and prolonging the service life of the filter. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. In addition, the same components are marked with the same reference numerals in the drawings, and the drawings are not drawn according to the actual proportion.

[0027] Figure 1 A structural schematic diagram of a fresh air machine provided by the embodiments of the present application is shown.

[0028] Figure 2 A structural schematic diagram of a fresh air machine provided by the embodiments of the present application is shown. Figure 1 A structural schematic diagram of a fresh air machine provided by the embodiments of the present application is shown.

[0029] Figure 3 A structural schematic diagram of a fresh air machine provided by the embodiments of the present application is shown. Figure 1 A structural schematic diagram of a fresh air machine provided by the embodiments of the present application is shown.

[0030] Figure 4 A flow chart of a control method of a fresh air machine provided by the embodiments of the present application is shown.

[0031] Explanation of reference numerals:

[0032] 1, shell; 11, air inlet; 12, air outlet; 13, fresh air channel;

[0033] 2, filter;

[0034] 3, intercepting device; 31, door frame; 32, filter baffle; 33, rotating shaft;

[0035] 4, environment sensor;

[0036] 5, foreign matter identification sensor. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] The new air machines sold on the market at present are all installed with fixed filters. When sudden bad environments such as wind sand, sandstorm and the like are encountered, the fixed filters may be blocked and fail to filter due to too many particulate matters and existence of light and large-area sundries, and are easily damaged. To solve such problems, the present application provides a filtering device, a new air machine and a filtering control method, which can prevent the filter from being blocked and prolong the service life of the filter.

[0039] Figure 1 A structure schematic diagram of a new air machine provided by the embodiments of the present application is shown; Figure 2 A structure schematic diagram of a new air machine provided by the embodiments of the present application is shown; Figure 1 An internal structure schematic diagram of a new air machine provided by the embodiments of the present application is shown, in which a filtering baffle of an intercepting device is in an open state; Figure 3 An internal structure schematic diagram of a new air machine provided by the embodiments of the present application is shown, in which a filtering baffle of an intercepting device is in a closed state; Figure 1 An internal structure schematic diagram of a new air machine provided by the embodiments of the present application is shown, in which a filtering baffle of an intercepting device is in a closed state.

[0040] As shown in the drawings, Figures 1 to 3 The embodiments of the present application provide a new air machine, which comprises a shell 1, a filter 2 and an intercepting device 3.

[0041] The shell 1 has an air inlet 11 and an air outlet 12, and a new air channel 13 is formed between the air inlet 11 and the air outlet 12. The shell 1 is placed along a horizontal direction, and the air inlet 11 and the air outlet 12 are arranged at two ends of the shell 1. The new air channel 13 is formed between the air inlet 11 and the air outlet 12. In a normal working mode, outdoor new air is supplied to pass through the air inlet 11 along the horizontal direction, and is sent to the indoor air from the air outlet 12.

[0042] The filter 2 is arranged in the new air channel 13, and the filter 2 comprises a filter screen. The mesh size of the filter screen allows small-particle sundries to pass through.

[0043] The intercepting device 3 is arranged between the air inlet 11 and the filter 2. The intercepting device 3 comprises a door frame 31 and a filtering baffle 32 which is openable and closable relative to the door frame 31.

[0044] When the filter baffle 32 is in the open state, the external fresh air is introduced into the filter 2 from the air inlet 11 via the door frame 31; when the filter baffle 32 is in the closed state, the external large-particle foreign matters are intercepted and crushed by the filter baffle 32, and the external fresh air is introduced into the filter 2 from the air inlet 11 via the upper part of the interception device 3.

[0045] It should be noted that the "large-particle foreign matter" and the "small-particle foreign matter" are relative, and the external contour size of the large-particle foreign matter is at least larger than the external contour size of the small-particle foreign matter allowed to pass through the filter 2.

[0046] Optionally, the top of the shell 1 is formed with a protrusion at a position corresponding to the interception device 3, so as to ensure that a certain space is formed between the interception device 3 and the top of the shell 1 to allow the fresh air to pass through. When the filter baffle 32 is in the open state, the filter baffle 32 is flipped to the upper part of the door frame 31 and is in the horizontal state, so as to allow the external fresh air to be introduced into the filter 2 from the air inlet 11 via the door frame 31, and the wind direction remains unchanged, so as not to affect the normal air purification function. When the filter baffle 32 is in the closed state, the filter baffle 32 is flipped to the lower part of the door frame 31 and is in the vertical state, so that the external large-particle foreign matters are intercepted and crushed by the filter baffle 32, and the external fresh air changes the wind direction and is introduced into the filter 2 from the air inlet 11 via the upper part of the interception device 3.

[0047] The fresh air machine provided by the embodiment of the present application is provided with the interception device 3 between the air inlet 11 and the filter 2 of the shell 1, the interception device 3 comprises the door frame 31 and the filter baffle 32 which is openable and closable relative to the door frame 31, when the filter baffle 32 is in the closed state, the external large-particle foreign matters are intercepted and crushed by the filter baffle 32, and the external fresh air is introduced into the filter 2 from the air inlet via the upper part of the interception device 3; when the filter baffle 32 is in the open state, the external fresh air is introduced into the filter 2 from the air inlet 11 via the door frame 31, so that when facing large and light foreign matters in a harsh environment, the large-particle foreign matters can be intercepted and crushed in the upstream of the filter 2, and the wind direction is changed to allow the air carrying small-particle foreign matters to enter the filter 2, so as to prevent the filter 2 from being blocked or even damaged, and prolong the service life of the filter 2.

[0048] In an optional example, the filter baffle 32 comprises a baffle body and a high-voltage electric release device embedded in the baffle body, and the high-voltage electric release device crushes the large-particle foreign matters by releasing high-voltage electricity.

[0049] It should be noted that the electric shock area of the high-voltage electric release device can cover the entire surface of the baffle body of the filter baffle 32, so as to crush the large-particle foreign matters in all directions and ensure the reliability of crushing. The release of high-voltage electricity can be continuous or intermittent, as long as it can effectively crush the large-particle foreign matters.

[0050] In an optional example, the fresh air ventilator provided by the embodiment of the present application further comprises an environment sensor 4 arranged on one side of the air inlet 11, which is used to sense the external environment condition and send a first electric signal when the environment condition is severe, and the intercepting device 3 closes the filter baffle 32 according to the first electric signal.

[0051] The environment sensor 4 provided by the embodiment of the present application can be an image sensor, which can determine whether it is a sandstorm weather according to the collected image information and determine the severity of the weather according to the wind force. According to the determination result, the corresponding first electric signal is sent to the intercepting device 3, and the intercepting device 3 is started according to the corresponding electric signal, for example, when the environment condition is severe, the first electric signal, i.e. the closing signal, is sent, and the intercepting device 3 closes the filter baffle 32 according to the first electric signal to prevent large-particle foreign matters from directly reaching the filter 2.

[0052] In an optional example, the fresh air ventilator provided by the embodiment of the present application further comprises a foreign matter identification sensor 5 arranged at the bottom of the door frame 31, which is used to send a second electric signal when there is a large-particle foreign matter at the filter baffle 32, and the intercepting device 3 controls the high-voltage electric release device to release high-voltage electricity to crush the large-particle impurities according to the second electric signal.

[0053] The foreign matter identification sensor 5 provided by the embodiment of the present application can be an infrared sensor, an image sensor, etc., which determines whether there is a large-particle foreign matter at the filter baffle 32 by identifying the size of the large-particle foreign matter. As described above, the judgment standard of the large-particle foreign matter is that the size of the large-particle foreign matter is at least larger than the filter screen size of the filter 2, and the size of the large-particle foreign matter and the severity level of the corresponding weather can be preset. According to the determination result, the corresponding second electric signal is sent to the intercepting device 3, and the intercepting device 3 is started according to the corresponding second electric signal, for example, when there is a large-particle foreign matter, the second electric signal, i.e. the crushing signal, is sent, and the intercepting device 3 controls the high-voltage electric release device to release high-voltage electricity to crush the large-particle impurities, thereby converting them into small-particle foreign matters that can pass through the filter screen of the filter 2.

[0054] In an optional example, the intercepting device 3 further comprises a driving motor, specifically, the filter baffle 32 is rotatably connected to the door frame 31 through a rotating shaft 33, and the output end of the driving motor is connected to the rotating shaft 33 to drive the filter baffle 32 to open or close relative to the door frame 31. The driving motor can be a stepping motor or a direct current servo motor, etc.

[0055] It should be noted that in actual application, the rotating shaft 33 can also be replaced by a fixed shaft, and the filtering baffle 32 is rotatably sleeved on the rotating shaft 33, and the driving motor directly drives the filtering baffle 32 to rotate, so as to achieve the same technical effect as described above, and therefore, the flexible adjustment and change do not deviate from the principles and scope of the present application, and should be limited within the protection scope of the present application.

[0056] Of course, the present application drives the rotating shaft 33 to drive the filtering baffle 32 to rotate by the driving motor, and the structure is simple and the connection relationship is easy to set.

[0057] In an optional example, the filter 2 includes one of an activated carbon filter membrane, a PM10 filter membrane, a PM2.5 filter membrane, and an electrostatic dust removal module, or a combination of at least two thereof, so as to be able to perform filtering operations on different kinds of foreign matters.

[0058] The high-voltage electric release device of the intercepting device 3 breaks the large-particle impurities by releasing high-voltage electricity, and the foreign matters may generate peculiar smell during the breaking process. When the filter 2 includes the activated carbon filter membrane, the air after breaking the impurities can be adsorbed and purified to remove the peculiar smell, effectively purifying the fresh air.

[0059] In addition, the PM10 filter membrane and the PM2.5 filter membrane can filter different sizes of suspended matters in the fresh air, and as much as possible improve the purification degree of the fresh air; and the electrostatic dust removal module can remove harmful substances such as static electricity in the fresh air.

[0060] Figure 4 A flow chart of a control method of a fresh air machine provided by an embodiment of the present application is shown.

[0061] As shown in Figure 4 The present application provides a control method of a fresh air machine as described above, which includes the following steps S1-S4:

[0062] Step S1: monitoring whether the external weather is severe weather;

[0063] Step S2: if yes, controlling the filtering baffle 32 of the intercepting device 3 to close, so that the external fresh air is introduced from the air inlet 11 to the filter 2 via the upper part of the intercepting device 3;

[0064] Step S3: monitoring whether there are large-particle foreign matters at the filtering baffle 32;

[0065] Step S4: if yes, controlling the filtering baffle 32 to break the large-particle foreign matters.

[0066] It should be noted that the fresh air unit provided in this application includes a controller (not shown), which controls the operation of the filter baffle 32 and high-voltage electrical control based on the aforementioned fresh air unit. When the unit starts, the environmental sensor 4 monitors whether the outside weather is severe. When encountering severe weather, the environmental sensor 4 sends a first electrical signal, and the interception device 3 controls the filter baffle 32 to close according to the first electrical signal. The filter baffle 32 flips from a horizontal position at the top of the door frame 31 to a vertical position below the door frame 31, intercepting large particles of foreign matter and preventing them from clogging the filter 2. The outside fresh air changes direction and is introduced into the filter 2 from the air inlet 11 through the top of the interception device 3.

[0067] Furthermore, the foreign object detection sensor 5 monitors whether there are large foreign particles at the filter baffle 32. If so, it sends a second electrical signal, and the interception device 3 controls the filter baffle 32 to break up the large foreign particles according to the second electrical signal. The broken-up small foreign particles can then enter the filter 2 for normal filtration. Odors may be generated during the breaking-up of large foreign particles. The filter 2, which includes an activated carbon filter membrane, can adsorb and purify the air after the impurities are broken up, removing odors and effectively purifying the fresh air.

[0068] The fresh air control method provided in this application embodiment involves setting an interception device 3 between the air inlet 11 of the housing 1 and the filter 2. The interception device 3 includes a door frame 31 and a filter baffle 32 that can be opened and closed relative to the door frame 31. When the external weather is detected as severe, the filter baffle 32 of the interception device 3 is controlled to be in a closed state, so that fresh air from the outside is introduced into the filter 2 from the air inlet through the top of the interception device 3, preventing large particles of foreign matter from clogging the filter 2. When large particles of foreign matter are detected at the filter baffle 32, the filter baffle 32 is controlled to break up the large particles of foreign matter. In this way, when facing large lightweight debris in a harsh environment, large particles of impurities can be intercepted and broken up upstream of the filter 2. At the same time, the airflow direction is changed to allow air carrying small particles of debris to enter the filter 2, preventing the filter 2 from becoming clogged or even damaged, and extending the service life of the filter 2.

[0069] In an optional example, the filter baffle 32 includes a baffle body and a high-voltage electric release device embedded within the baffle body. In step S2, controlling the filter baffle 32 to break up the large foreign particles includes:

[0070] The high-voltage discharge device releases high voltage to break up large particles of impurities. It should be noted that the discharge area of ​​the high-voltage discharge device can cover the entire surface of the filter baffle 32 to ensure comprehensive and reliable breaking up of large particles. The release of high voltage can be continuous or intermittent, as long as it effectively breaks up large particles.

[0071] In an optional example, the control method also includes:

[0072] Step S5: If no large particles are found in the filter baffle 32 within a preset time period, the filter baffle 32 is opened to allow fresh air from the outside to be introduced into the filter 2 through the air inlet 11 and the door frame 31. When the filter baffle 32 is open, it flips over to the top of the door frame 31 and is in a horizontal position, allowing fresh air from the outside to be introduced into the filter 2 through the air inlet 11 and the door frame 31. The airflow direction remains unchanged, thus not affecting its normal air purification function.

[0073] In an optional example, the control method also includes:

[0074] If no large foreign objects are detected at the filter baffle 32 within the preset time period, the filter baffle 32 will be opened to allow fresh air from the outside to be introduced into the filter 2 from the air inlet 11 through the door frame 31.

[0075] If no large particles are present within the preset time period, the filter baffle 32 should be opened to allow fresh air to be introduced into the filter 2 normally, thereby improving filtration efficiency. This preset time period can be, for example, 30 minutes, or other durations, depending on the specific application environment.

[0076] In an optional example, the control method also includes:

[0077] If the outside weather is not severe, the filter baffle 32 of the control interception device 3 will open, so that fresh air from the outside can be introduced into the filter 2 from the air inlet 11 through the door frame 31.

[0078] Under normal weather conditions, large particles are generally not generated. Therefore, to ensure the filtration efficiency of filter 2, filter baffle 32 should be kept in the open position.

[0079] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0080] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0081] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0082] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fresh air ventilator, characterized in that, include: The housing has an air inlet and an air outlet, and a fresh air channel is formed between the air inlet and the air outlet; A filter is installed within the fresh air duct; An interception device is disposed between the air inlet and the filter, the interception device including a door frame and a filter baffle that can be opened and closed relative to the door frame; When the filter baffle is in the open state, fresh air from outside is introduced into the filter through the air inlet and the door frame; when the filter baffle is in the closed state, large particles of foreign matter from outside are intercepted and broken by the filter baffle, and fresh air from outside is introduced into the filter through the air inlet and above the interception device, while small particles of foreign matter pass through the filter along with the fresh air from outside.

2. The fresh air system according to claim 1, characterized in that, The filter baffle includes a baffle body and a high-voltage electric release device embedded in the baffle body. The high-voltage electric release device breaks up the large foreign particles by releasing high voltage.

3. The fresh air system according to claim 2, characterized in that, It also includes an environmental sensor, which is located on one side of the air inlet to sense the external environmental conditions and send a first electrical signal when the environmental conditions are severe. The interception device closes the filter baffle according to the first electrical signal.

4. The fresh air blower according to claim 3, wherein It also includes a foreign object detection sensor, which is located at the bottom of the door frame and is used to send a second electrical signal when there are large foreign particles at the filter baffle. The interception device controls the high-voltage release device to release high voltage according to the second electrical signal to break up the large foreign particles.

5. The fresh air system according to claim 1, characterized in that, The interception device also includes a drive motor. The filter baffle is rotatably connected to the door frame via a rotating shaft. The output end of the drive motor is connected to the rotating shaft to drive the filter baffle to open or close relative to the door frame.

6. The fresh air system according to claim 1, characterized in that, The filter includes one or a combination of at least two of the following: activated carbon filter membrane, PM10 filter membrane, PM2.5 filter membrane, and electrostatic dust removal module.

7. A control method for a fresh air unit as described in any one of claims 1 to 6, characterized in that, include: Monitor whether the external weather is severe; If so, the filter baffle of the control interception device is closed, so that fresh air from the outside is introduced into the filter from the air inlet through the top of the interception device; Monitor whether there are large foreign particles at the filter baffle; If so, control the filter baffle to break up the large foreign particles.

8. The control method according to claim 7, characterized in that, The filter baffle includes a baffle body and a high-voltage electric release device embedded in the baffle body. Controlling the filter baffle to break up the large foreign particles includes: The high-voltage release device is controlled to release high voltage to break up the large foreign object.

9. The control method according to claim 7, characterized in that, Also includes: If no large foreign objects are detected at the filter baffle within a preset time period, the filter baffle is opened to allow fresh air from outside to be introduced into the filter through the air inlet and the door frame.

10. The control method according to claim 7, characterized in that, Also includes: If the outside weather is not severe, the filter baffle of the control interception device will open, allowing fresh air from the outside to be introduced into the filter through the air inlet and the door frame.

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