Intelligent cleaning device for air conditioner filter

Abstract

The present invention relates to an intelligent cleaning device for an air conditioner filter, comprising a filter and a middle frame shell, characterized in that it also comprises a filter frame for installing the filter and fixing it on the middle frame shell, a cleaning component placed outside the filter and in contact with the filter, and two sets of lifting components connected to the filter frame and controlling the up and down movement of the filter, wherein the filter frame is installed at the front air inlet position of the middle frame shell; the cleaning component is located at the lower part in front of the filter, and cleans by contacting the filter; the two sets of lifting components are respectively fixed at the upper left and right positions of the front of the air conditioner and connected to the filter frame. The present invention controls the up and down movement of the filter through the lifting component and can be removed to the outside of the air conditioner body to avoid secondary pollution of dust; the structure is simple and convenient for manual disassembly and cleaning of the filter; the area division of the short suction port of the dust suction strip can significantly improve the suction force and enhance the dust suction effect; the automatic cleaning of the air conditioner filter can also be intelligently controlled by the dust sensor.

Description

Technical Field

[0001] The invention belongs to the field of intelligent air conditioners, and relates to automatic cleaning of air conditioners, in particular to an intelligent cleaning device for an air conditioner filter. Background Art

[0002] Air conditioners are essential household appliances in daily life. Their air conditioning effects have a significant impact on people's health. Clogged filters will not only reduce the cooling / heating effects of air conditioners, but also carry a large number of bacteria that make people susceptible to diseases. Therefore, the air conditioner filters need to be cleaned regularly. Most air conditioners on the market only clean the internal refrigeration components, not the filters. Even if some of them can clean the filters, they are only done inside the air conditioner. For example, the invention patent with the authorization announcement number CN1906449B and the authorization announcement date 2010.04.07, entitled "Air conditioner with automatic air filter cleaning function in indoor unit", discloses that the filter (i.e., air conditioner filter) is divided into multiple parts in the moving direction, reciprocatingly moves through the dust collection part, and the dust collected in the dust collection part is discharged by the dust discharge fan, so as to realize automatic cleaning of the air filter. However, since the automatic cleaning work is carried out on the upper part of the air conditioner, the cleaned dust is easy to fall into the body, thereby causing secondary pollution; the automatic cleaning of the filter is not a one-time solution, but only prolongs the time required for manual cleaning of the filter. The addition of the automatic cleaning device makes it more difficult to disassemble and assemble the air conditioner filter at a high place, and the structure is complicated, which is not conducive to manual and thorough cleaning of the filter in the later stage. Summary of the invention

[0003] The design purpose of the present invention is to address the problems that the automatic cleaning process of the air-conditioning filter may easily cause secondary pollution inside the air-conditioning body and the air-conditioning filter is difficult to disassemble and assemble, and to propose an air-conditioning filter intelligent cleaning device that supports the filter to automatically remove from the air-conditioning body and can automatically clean the filter.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is specifically as follows.

[0005] An intelligent cleaning device for an air conditioner filter includes a filter and a middle frame shell, and also includes a filter frame for installing the filter and fixing it on the middle frame shell, a cleaning component placed outside the filter and directly in contact with the filter, and two sets of lifting components connected to the filter frame and controlling the up and down movement of the filter, wherein the filter frame is installed at the air inlet position of the air conditioner at the front of the middle frame shell and is located behind the air conditioner grille panel; the cleaning component is located at the lower part in front of the filter, and contacts and cleans the filter; the two sets of lifting components are respectively fixed at the upper left and right positions of the front of the air conditioner and connected to the filter frame. The lifting component controls the filter to move up and down and escape to the outside of the air conditioner body. During the up and down movement of the filter, the cleaning component automatically cleans the filter to prevent dust from falling into the interior of the air conditioner body and causing secondary pollution.

[0006] Furthermore, a filter outer guide rail and a filter inner guide rail are provided in the middle frame shell.

[0007] Furthermore, the middle frame shell is provided with an outside dust sensor and an inside dust sensor at positions before and after the filter, respectively, for detecting dirt and blockage of the filter.

[0008] Furthermore, the lifting assembly specifically includes a lifting rope, a roller and a lifting motor, wherein the lifting rope is connected to the filter frame, and the lifting motor is started to drive the roller connected to it to rotate, thereby causing the lifting rope wrapped around the roller to be spun out, thereby controlling the up and down movement of the filter frame connected to the lifting rope.

[0009] Furthermore, the filter is installed on the filter frame to form an integrated filter assembly, the filter assembly is installed between the filter outer guide rail and the filter inner guide rail of the middle frame shell, and the filter frame is made of lightweight metal.

[0010] Furthermore, a filter frame hook is provided at the left and right positions of the upper part of the filter frame for hooking on the lifting component, and has a filter frame bottom.

[0011] Furthermore, the cleaning component specifically includes a dust suction box, a dust suction film, a dust suction strip, a dust suction strip rotating motor, a dust suction pipe and a dust suction motor, wherein the dust suction box is a long hollow structure with a width greater than the width of the filter; one end of the dust suction box is connected to the dust suction motor through the dust suction pipe, and the other end is closed; the dust suction box has an opening close to the filter side and is covered with a dust suction film; a long dust suction port is provided on the dust suction film, and a plurality of dust sweeping brushes are provided below the long dust suction port for sweeping dust on the filter; one end of the dust suction strip is connected to the dust suction strip rotating motor and is driven to rotate by the dust suction strip rotating motor; the dust suction strip is located inside the dust suction box, and can adsorb the dust swept on the filter into the dust suction box, and discharge it through the dust suction pipe and the dust suction motor.

[0012] Furthermore, the cross section of the dust suction strip is an arc-shaped thin wall, on which a plurality of short dust suction ports are opened, and the plurality of short dust suction ports are evenly spaced in the vertical direction and are evenly arranged on the dust suction strip with the end to end connected horizontally.

[0013] Furthermore, a convex strip is provided under each short dust suction port, and its length is consistent with the short dust suction port. When one of the short dust suction ports is working, the position of the short dust suction port coincides with the long dust suction port on the dust suction membrane, and the corresponding convex strip under the short dust suction port lifts up the dust sweeping brush of the dust suction membrane at the corresponding position, so that the dust sweeping brush can contact the filter and clean the filter. At this time, the short dust suction port serves as a working dust suction port, and the other short dust suction ports are in a closed state.

[0014] Furthermore, the short dust suction port is driven to rotate up and down by the dust suction port rotating motor, so that the short dust suction port overlaps with the long dust suction port on the dust suction membrane one by one, and the alternating operation of multiple short dust suction ports can clean different corresponding parts of the filter.

[0015] Furthermore, the dust suction strip rotation motor adopts a stepping motor, and the corresponding short dust suction ports and long dust suction ports are controlled to cooperate in dust suction by the number of rotation steps determined according to the number of short dust suction ports.

[0016] Furthermore, the upper and lower ends of the cleaning component are respectively provided with an infrared sensing head and a micro switch. The infrared sensing head can sense whether the top of the filter reaches the dust collection position during the descent of the filter assembly, and once it reaches the position, the filter assembly stops descending; the micro switch can sense whether the bottom of the filter frame rises into place during the ascent of the filter assembly, and once it reaches the position, the filter assembly stops rising.

[0017] The beneficial effects of the present invention are as follows: the present invention can automatically turn on the cleaning function of the air-conditioning filter by adopting a dust sensor to detect the blockage condition of the filter. During the automatic cleaning process of the filter, the filter can be moved up and down and removed from the outside of the air-conditioning body through the lifting assembly, thereby avoiding secondary pollution of the body caused by the dust swept down; the short dust suction port area division of the dust suction strip in the cleaning assembly can significantly improve the suction force, enhance the dust suction effect on the filter, and clean more thoroughly; in addition, the filter assembly structure that can be removed from the outside of the air-conditioning body has a simple structure, which makes it more convenient to disassemble and assemble the filter, and is convenient for manual disassembly and cleaning of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of the intelligent cleaning device for the air conditioning filter.

[0019] Figure 2 This is a schematic diagram of the left side structure in which part of the filter is removed from the outside of the machine body during filter cleaning.

[0020] Figure 3 This is a schematic diagram of the left side structure when the filter is completely removed from the outside of the machine body and manually removed.

[0021] Figure 4 This is a schematic diagram of the front structure when the filter is completely removed from the outside of the machine body and manually removed.

[0022] Figure 5 It is a schematic diagram of the structure of the cleaning component in the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the dust collecting strip in the present invention.

[0024] Figure 7 This is a schematic diagram of the structure in which the short dust suction port and the long dust suction port are closed in sequence during the filter cleaning process. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the optimal embodiments described herein are only used to explain the present invention and are not used to limit the application of the present invention.

[0026] The design purpose of the present invention is to solve the problem that the air conditioner filter is easily caused by secondary pollution inside the air conditioner body during the automatic cleaning process and the air conditioner filter is difficult to disassemble and assemble. An air conditioner filter intelligent cleaning device is proposed, which supports the filter to automatically detach from the air conditioner body and can automatically clean the filter.

[0027] Figure 1 The structure diagram of the intelligent cleaning device for air conditioning filter is shown in FIG. Figure 1 As shown, under the action of the wind wheel 1200 and the air duct 1100, indoor air enters the air conditioner through the grille of the grille panel 300. The air outlet 1000 is at the lower part of the air conditioner, and the wind direction can be adjusted by the wind guide strip 600. An evaporator 900 is arranged in front of the wind wheel 1200, and a water receiving tray 700 is arranged below the evaporator 900. The intelligent cleaning device for air conditioning filter proposed in the present invention comprises a filter 210 and a middle frame shell 400, a filter frame 220 for installing the filter 210 and fixing it on the middle frame shell 400, a cleaning component 100 placed on the outside of the filter 210 and directly contacting the filter 210, and two groups of lifting components 500 connected to the filter frame 220 and controlling the up and down movement of the filter, wherein the filter frame 220 is installed at the air inlet position of the air conditioner at the front of the middle frame shell 400 and is located behind the air conditioning grille panel 300; the cleaning component 100 is located at the lower part in front of the filter, and contacts and cleans the filter 210; the two groups of lifting components 500 are respectively fixed at the upper left and right positions of the front of the air conditioner, and are connected to the filter frame 220. The lifting assembly 500 controls the filter 210 to move up and down and escape to the outside of the air conditioner body. During the up and down movement of the filter frame 210, the cleaning assembly 100 automatically cleans the filter 210 to prevent dust from falling into the air conditioner body and causing secondary pollution.

[0028] The middle frame housing 400 is provided with a filter outer guide rail 401 and a filter inner guide rail 402 for fixing the filter, and a filter outer dust sensor 801 and a filter inner dust sensor 802 are respectively provided on the middle frame housing 400 before and after the filter to detect the dirty and blocked condition of the filter. Figure 1 shown.

[0029] like Figure 2As shown, the lifting assembly 500 specifically includes a lifting rope 501, a roller 502 and a lifting motor 503, wherein the lifting rope 501 is connected to the filter frame 220, and the lifting motor 503 is started to drive the roller 502 connected thereto to rotate, so that the lifting rope 501 wound around the roller 502 is swung out, thereby controlling the up and down movement of the filter frame 220 connected to the lifting rope 501.

[0030] The filter 210 and the filter frame 220 form an integrated filter assembly 200, which is installed between the filter outer guide rail 401 and the filter inner guide rail 402 of the middle frame housing 400. The filter frame 220 is made of light metal, and the filter 210 is installed on the filter frame 220. The filter frame 220 is provided with a filter frame hook 221 at the upper left and right positions, which is used to hook the lower part of the lifting rope 501 of the lifting assembly 500. The filter frame 220 has a bottom 222, such as Figure 3 shown.

[0031] like Figure 4 and Figure 5 The cleaning assembly 100 specifically includes a dust box 110, a dust film 120, a dust strip 130, a dust strip rotating motor 140, a dust pipe 150 and a dust motor 160, wherein the dust box 110 is a long hollow structure with a width greater than the width of the filter. One end of the dust box 110 is connected to the dust motor 160 through the dust pipe 150, and the other end is closed. The dust box 110 has an opening near the filter and is covered with a dust film 120. A long dust suction port 122 is provided on the dust suction membrane 120, and a plurality of dust sweeping brushes 121 are provided below the long dust suction port 122 for sweeping dust on the filter screen; one end of the dust suction strip 130 is connected to the dust suction strip rotating motor 140, and is driven to rotate by the dust suction strip rotating motor 140. The dust suction strip 130 is located inside the dust suction box 110, and can absorb the dust swept on the filter screen into the dust suction box 110, and discharge it through the dust suction pipe 150 and the dust suction motor 160.

[0032] Furthermore, the cross section of the dust suction strip 130 is an arc-shaped thin wall, on which a plurality of short dust suction ports are opened. The present application takes the arrangement of three short dust suction ports 132, 134 and 136 as an example to explain in detail the structure of the dust suction strip and the process of the short dust suction ports and the long dust suction ports on the dust suction film closing and suctioning in sequence, such as Figure 6 and Figure 7 As shown, three short suction ports are evenly spaced in the vertical direction and are evenly arranged on the suction strip 130 in the horizontal position, and each short suction port is provided with a convex strip (such as Figure 6 and Figure 7 The convex strips 131, 133 and 135 in the embodiment have a length consistent with the short suction port. Figure 5Taking the short dust suction port 132 as an example, the short dust suction port 132 coincides with the long dust suction port 122 on the dust suction membrane 120, and the corresponding convex strip 131 below the short dust suction port 132 lifts up the dust sweeping brush 121 of the dust suction membrane at the corresponding position, and the dust sweeping brush 121 can contact the filter 210 and clean the filter 210. At this time, the short dust suction port 132 serves as the working dust suction port, and the other short dust suction ports 134 and 136 are in a closed state.

[0033] Furthermore, the short suction port is driven by the suction strip rotating motor 140 to rotate up and down, so that the short suction port is overlapped with the long suction port 122 on the suction film 120 one by one. The alternating operation of multiple short suction ports can clean different parts corresponding to the filter screen, such as Figure 7 The dust suction strip rotating motor 140 is a stepping motor, and controls the corresponding short dust suction ports and the long dust suction ports 122 to cooperate with each other to suction dust by the number of rotation steps determined according to the number of short dust suction ports.

[0034] like Figure 2 As shown, the upper and lower ends of the cleaning component 100 are respectively provided with an infrared sensing head 804 and a micro switch 803. The infrared sensing head 804 can sense whether the top of the filter 210 reaches the dust collection position during the descent of the filter frame 220, and stop descending once it reaches the position; the micro switch 803 can sense whether the bottom 222 of the filter frame 220 rises into place during the ascent of the filter frame 220, and stop rising once it reaches the position.

[0035] Example 1.

[0036] As a specific implementation method, in order to ensure suction and improve dust collection efficiency, this embodiment sets three short dust suction ports on the dust collection strip, that is, divides the dust collection area into three zones to perform filter dust collection work separately. It should be understood that the number of partitions of the dust collection strip here is not limited, and multiple different short dust suction ports can be set to adapt and adjust according to the specific size of the air conditioner and the dust collection effect. This embodiment does not limit the scheme, but is for better explaining the content of the invention.

[0037] After the air conditioner is turned on, indoor air enters the air conditioner through the grille panel and the filter. The dust sensor outside the mesh and the dust sensor inside the mesh can detect the dust passing through the filter before and after filtration according to the flow of air and monitor the difference. After a period of use, the filter accumulates dust and the filtering effect is significantly reduced. At this time, the difference in the dust passing through the filter can be compared with the initial difference to detect the degree of dust blockage of the filter. Once the difference reaches the preset value, the air conditioner will intelligently start the automatic filter cleaning work. In specific implementation, it can also be judged in combination with the use time of the air conditioner. When the use time reaches the preset time length, the filter cleaning work can also be intelligently turned on. The filter cleaning and dust removal will be automatically performed based on the condition that is achieved first of the two conditions to ensure the health of the user.

[0038] When the filter is automatically cleaned, the lifting motor of the lifting assembly starts and drives the roller to rotate, so that the lifting rope is rotated out and drives the filter assembly to automatically descend. During the descent process, the filter is guided by the outer and inner guide rails to ensure stable descent without shaking. At the same time, the dust suction strip rotating motor drives the dust suction strip to rotate, so that one of the short dust suction ports is opposite to the long dust suction port on the dust suction membrane, while the other short dust suction ports are sealed, and the filter can only communicate with the dust suction box through the short dust suction port. At this time, the dust suction strip rotating motor stops rotating, and the short dust suction port serves as the working short dust suction port, and the corresponding convex strip below it squeezes the dust suction membrane, so that the dust sweeping brush at the corresponding position of the dust suction membrane protrudes and contacts the filter, so that the filter can be cleaned in the process of the up and down movement of the filter. At this time, the dust sweeping brushes corresponding to the other short dust suction ports will not protrude to clean the filter, and the dust suction motor starts to start. Due to the suction force, the dust suction membrane is tightly attached to the outer surface of the dust suction strip, and the dust on the filter is sucked into the dust suction box through the working short dust suction port, and discharged to the outside through the dust suction pipe.

[0039] During the process of the filter being lowered, the filter is cleaned and dusted in an area through the short dust suction port in operation. When the filter rack is lowered to the top and opposite to the dust suction port, the filter rack passes through the infrared sensing head. At this time, the lower part of the filter rack has extended out of the air conditioner body, and the upper part is still inside the air conditioner. The infrared sensing head detects the top of the filter rack and determines that the filter cleaning is completed. The lifting motor starts to reverse, and the filter rack changes from descending to gradually rising until the lower part of the filter rack touches the micro switch. It is determined that the filter rack has risen to the right position, so the lifting motor stops rotating, the filter rack stops rising, and the filter area located at the first short dust suction port is dust-cleaned. In this embodiment, the infrared sensing head and the micro switch are used to detect and determine whether the filter rack has descended and risen to the specified position, and the lifting motor can be controlled by the existing air conditioning control system to achieve the up and down movement of the filter rack.

[0040] The dust suction strip rotation motor drives the dust suction strip to rotate, so that other short dust suction ports are aligned with the long dust suction ports on the dust suction membrane in turn and the above process is repeated, so as to realize dust removal and cleaning of the filter area corresponding to other short dust suction ports in turn, thereby completing automatic cleaning of the entire filter area.

[0041] Example 2.

[0042] Although the air conditioner filter can be automatically cleaned, manual cleaning of the filter is inevitable. As a specific implementation method, the user can directly check the filter cleaning effect during the automatic cleaning process. If the cleaning effect does not meet the user's needs or the user thinks that the filter needs to be cleaned during the use of the air conditioner, the air conditioner can enter the manual filter cleaning mode, or the accumulated usage time can be set to remind the user to manually clean the filter thoroughly. When manually cleaning the filter, the filter frame will gradually drop until it is completely out of the air conditioner body. Please refer to Figure 3 or Figure 4As shown, the filter holder can remain unchanged and only the filter can be removed for cleaning; or the filter holder hook can be removed from the lower part of the lifting rope, and the filter holder and filter can be removed for cleaning. After cleaning, the filter and filter holder are installed back on the lifting rope, and the filter holder automatically rises until it returns to its original position, completing the manual and thorough cleaning process of the air conditioner filter.

[0043] In summary, the intelligent air-conditioning filter cleaning device provided by the present invention can automatically turn on the cleaning function of the air-conditioning filter by adopting a dust sensor to detect the blockage condition of the filter. During the automatic cleaning process of the filter, the filter can be moved up and down and removed from the outside of the air-conditioning body through the lifting assembly, so as to avoid secondary pollution of the body caused by the dust swept down; the short dust suction port area division of the dust suction strip in the cleaning assembly can significantly improve the suction force, enhance the dust suction effect on the filter, and clean more thoroughly; in addition, the structural design of the filter assembly that can be removed from the outside of the air-conditioning body has a simple structure, which makes it more convenient to disassemble and assemble the filter, and is convenient for manual disassembly and manual thorough cleaning of the filter.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An intelligent cleaning device for an air conditioner filter, comprising a filter and a middle frame shell, a filter frame for installing the filter and fixed on the middle frame shell, a cleaning component placed outside the filter and directly in contact with the filter, and two sets of lifting components connected to the filter frame and controlling the filter to move up and down, the filter frame being installed at the air inlet position of the air conditioner at the front of the middle frame shell and located behind the air conditioner grille panel; the cleaning component being located at the lower part in front of the filter and contacting with the filter to clean it; the two sets of lifting components being respectively fixed at the upper left and right positions of the front of the air conditioner and connected to the filter frame, the filter being controlled to move up and down and to be disengaged to the outside of the air conditioner body by the lifting components, the filter being automatically cleaned by the cleaning component during the up and down movement of the filter to prevent dust from falling into the inside of the air conditioner body, characterized in that The middle frame shell is provided with an outer filter guide rail and an inner filter guide rail, and the cleaning component specifically comprises a dust suction box, a dust suction film, a dust suction strip, a dust suction strip rotating motor, a dust suction pipe and a dust suction motor, wherein the dust suction box is a long strip-shaped hollow structure with a width greater than the width of the filter, one end of the dust suction box is connected to the dust suction motor through the dust suction pipe, and the other end is closed, the dust suction box has an opening close to the filter side and is covered with a dust suction film on the opening, a long dust suction port is provided on the dust suction film, and a plurality of dust sweeping brushes are provided below the long dust suction port for sweeping dust on the filter, one end of the dust suction strip is connected to the dust suction strip rotating motor and is driven to rotate by the dust suction strip rotating motor, and the dust suction strip is located in the dust suction box Interior; the cross-section of the dust suction strip is an arc-shaped thin wall, on which a plurality of short dust suction ports are opened, and the plurality of short dust suction ports are evenly spaced in the vertical direction and are evenly arranged on the dust suction strip in the horizontal position, end to end connected left and right; a convex strip is provided under each short dust suction port, and its length is consistent with the short dust suction port. When one of the short dust suction ports is in a working state, the other short dust suction ports are in a closed state. The short dust suction ports in a working state coincide with the positions of the long dust suction ports on the dust suction membrane, and the corresponding convex strips under the short dust suction ports lift up the dust sweeping brush of the dust suction membrane at the corresponding position, so that the dust sweeping brush can contact the filter and clean the filter, and the dust swept on the filter is adsorbed into the dust suction box and discharged through the dust suction pipe and the dust suction motor.

2. The intelligent cleaning device for air conditioning filter according to claim 1, characterized in that: The middle frame shell is provided with an outside dust sensor and an inside dust sensor at positions before and after the filter respectively.

3. The intelligent cleaning device for air conditioning filter according to claim 1, characterized in that: The lifting assembly specifically includes a lifting rope, a roller and a lifting motor, wherein the lifting rope is connected to the filter frame, and the lifting motor is started to drive the roller connected to it to rotate, so that the lifting rope wrapped around the roller is spun out, and the filter frame connected to the lifting rope is controlled to move up and down.

4. The intelligent cleaning device for air conditioning filter according to claim 1, characterized in that: The filter is installed on the filter frame to form an integrated filter assembly, and the filter assembly is installed between the filter outer guide rail and the filter inner guide rail of the middle frame shell.

5. The intelligent cleaning device for air conditioning filter according to claim 1, characterized in that: A filter frame hook is respectively arranged at the left and right positions of the upper part of the filter frame, and a filter frame bottom is provided.

6. The intelligent cleaning device for air conditioning filter according to any one of claims 1 or 5, characterized in that: The filter frame is made of light metal.

7. The intelligent cleaning device for air conditioning filter according to claim 1, characterized in that: The short dust suction port is driven by the dust suction port rotating motor to rotate up and down, so that the short dust suction port is overlapped with the long dust suction port on the dust suction film one by one. The alternating operation of multiple short dust suction ports can clean different corresponding parts of the filter screen.

8. The intelligent cleaning device for air conditioning filter according to claim 7, characterized in that: The dust suction strip rotation motor adopts a stepping motor, and controls the corresponding short dust suction ports and the long dust suction ports to cooperate in dust suction through the number of rotation steps determined according to the number of short dust suction ports.

9. The intelligent cleaning device for air conditioning filter according to claim 1, characterized in that: An infrared sensing head and a micro switch are respectively provided at the upper and lower ends of the cleaning component. The infrared sensing head can sense whether the top of the filter reaches the dust collection position during the descent of the filter component. Once it reaches the position, the filter component stops descending; the micro switch can sense whether the bottom of the filter frame rises into place during the ascent of the filter component. Once it reaches the position, the filter component stops rising.

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