Filter screen system working method, filter screen system and cleaning machine

Abstract

The invention relates to a working method of a filter screen system. The filter screen system comprises a filter screen arranged on an air duct path. Detecting a wind speed distribution data set on the cross section of the air duct at the downstream of the filter screen, judging the wind speed fluctuation condition according to wind speed values in the wind speed distribution data set, and judging whether the filter screen is damaged or not according to the wind speed fluctuation condition; when it is judged that the filter screen is damaged, working parameters of the downstream of the filter screen in the air duct are detected and obtained, and the damage degree of the filter screen is judged according to the working parameters and air speed data in the air speed distribution data set; reminding to replace the filter screen according to the damage degree of the filter screen, reducing the air quantity passing through the filter screen or not processing. The invention further relates to the filter screen system applying the filter screen system working method and the cleaning machine applying the filter screen system. According to the working method of the filter screen system, the damage condition of the filter screen can be found in time. On the basis, the damage degree of the filter screen is judged, different treatment means are adopted, the service life of the filter screen is prolonged as much as possible, and the replacement frequency of the filter screen is reduced.

Description

Technical Field

[0001] The invention relates to a working method of a filter system of a cleaning machine, a filter system and a cleaning machine. Background Art

[0002] With the improvement of people's living standards, the use of various cleaning machines such as sweepers and scrubbers is becoming more and more common. In existing cleaning machines, filters are set to filter garbage and dust, and then the filtered garbage and dust are stored in the dust box. During the operation of the cleaning machine, sharp objects such as glass slag and melon seed shells are sometimes sucked in, and these sharp objects will damage the filter. Existing cleaning machines are unable to detect the damage of the filter in time, and when the filter is seriously damaged, it will affect the life of the rear-end fan. Or when the user finds that the filter is slightly damaged, he directly replaces the filter, which does not give full play to the service life of the filter. At the same time, it increases the number of times the filter is replaced, and the disassembly and replacement of the filter is relatively cumbersome, time-consuming and labor-intensive, and increases the probability of damaging the structure of the cleaning machine. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a filter system working method that can timely judge the damage state of the filter, fully ensure the service life of the filter and reduce the frequency of filter replacement, with respect to the above-mentioned prior art.

[0004] The second technical problem to be solved by the present invention is to provide a filter system with an adjustable air outlet area for the above-mentioned prior art, thereby reducing the air volume passing through the filter and increasing the service life of the filter.

[0005] The third technical problem to be solved by the present invention is to provide a cleaning machine using the aforementioned filter system in view of the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a filter system working method, characterized in that: the filter system includes a filter arranged on the air duct path;

[0007] Detecting a wind speed distribution data group on the cross section of the wind duct located downstream of the filter, judging the wind speed fluctuation according to the wind speed value in the wind speed distribution data group, and judging whether the filter is damaged according to the wind speed fluctuation;

[0008] When judging that the filter is damaged, the working parameters of the filter downstream in the air duct are detected and obtained, and the degree of damage of the filter is judged according to the working parameters and the wind speed data in the wind speed distribution data group;

[0009] According to the degree of damage to the filter, it will remind you to replace the filter, reduce the air volume passing through the filter, or do nothing.

[0010] As an improvement, the method to determine whether the filter is damaged is:

[0011] Obtain the maximum wind speed value Vmax and the minimum wind speed value Vmin in the wind speed distribution data group;

[0012] Calculate v1=Vmax / Vmin, compare v1 with a preset proportional threshold v10, if v1>v10, determine that the filter is damaged, otherwise determine that the filter is not damaged; or

[0013] Calculate v2=Vmax-Vmin, compare v2 with the preset difference threshold v20, if v2>v20, determine that the filter is damaged, otherwise determine that the filter is not damaged.

[0014] As an improvement, when judging whether the filter is damaged, the method for judging the degree of damage of the filter is as follows:

[0015] The working parameters downstream of the filter in the air duct are detected and obtained as humidity data, and then a humidity function s(t) consisting of the humidity data changing with time is obtained;

[0016] At the same time, the wind speed average value of the wind speed data in the wind speed distribution data group is calculated, and then the wind speed function v(t) formed by the wind speed average value data changing with time is obtained;

[0017] Perform Fourier transform on humidity function s(t) and wind speed function v(t), and then obtain the corresponding spectrum functions s(w) and v(w) respectively, and calculate the cross-correlation function f(w)=s(w)*v(w). If the correlation coefficient x of the cross-function is greater than the set correlation threshold x0, perform inverse Fourier transform on f(w) and decompose it into two main components f1 and f2, where f1>f2;

[0018] Calculate f=f1 / f2 and determine the degree of filter damage based on f.

[0019] As an improvement, f is compared with a preset first threshold value f01 and a second threshold value f02, where f01<f02; if f<f01, it is judged that the filter is slightly damaged and no treatment is performed; if f01≤f≤f02, it is judged that the degree of damage to the filter is general and the air volume passing through the filter is reduced; if f>f02, it is judged that the filter is severely damaged and a reminder to replace the filter is activated.

[0020] The technical solution adopted by the present invention to solve the above second technical problem is: a filter system, characterized in that: it includes:

[0021] A dust box having an air inlet, an air outlet, and an opening;

[0022] A filter screen is arranged to cover the opening of the dust box;

[0023] A driving mechanism is arranged on the dust box and is connected to the filter screen driving device, and is used to drive the filter screen to flip;

[0024] A baffle, close to the air outlet and movably arranged on the dust box;

[0025] The linkage mechanism is arranged between the driving mechanism and the baffle plate, and the baffle plate is driven to move when the driving mechanism drives the filter screen to flip, thereby blocking a part of the air outlet;

[0026] A wind speed detector is arranged at the air outlet of the dust box;

[0027] A humidity detector is arranged at the air outlet of the dust box;

[0028] A controller is connected with the driving mechanism, the wind speed detector, and the humidity detector by electrical signals;

[0029] The memory is connected to the controller by electrical signals. The memory stores a control program, which can be read and executed by the controller to implement the filter system working method as described above.

[0030] The structure is simple. The driving mechanism comprises a motor, a worm connected to a driving end of the motor, and a turbine meshed with the worm. The filter is connected to the turbine.

[0031] Preferably, the filter screen comprises a frame and a mesh body arranged in the frame, and the frame is connected to the turbine via a connecting rod.

[0032] The structure is simple. The linkage mechanism comprises a moving seat threadedly sleeved on the worm, and a connecting piece is connected between the moving seat and the baffle.

[0033] Preferably, the air inlet and the air outlet are arranged on the side walls of the dust box, and the opening is opened on the end surface of the dust box.

[0034] The technical solution adopted by the present invention to solve the above-mentioned third technical problem is: a cleaning machine, including a body with an air duct, and a fan arranged at the outlet end of the air duct, characterized in that: it also includes a filter system as mentioned above, the filter system is arranged in the body, and the filter system is connected to the position upstream of the fan on the air duct path through the air inlet and outlet fluids on the dust box.

[0035] Compared with the prior art, the advantages of the present invention are: the working method of the filter system in the present invention can detect the damage of the filter and find the damage of the filter in time. And on the basis of the occurrence of filter damage, the damage degree of the filter can be judged, and then different treatment methods can be adopted according to different damage degrees, so as to extend the service life of the filter as much as possible and reduce the replacement frequency of the filter.

[0036] The filter system using the working method of the filter system can fully utilize the filter and reduce the use cost on the basis of ensuring the use effect.

[0037] The cleaning machine using this filter system makes use of the filter more intelligently and makes the best use of it. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a three-dimensional diagram of the filter system in an embodiment of the present invention.

[0039] Figure 2 Flow chart of the working method of the filter system in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below with reference to the accompanying drawings.

[0041] like Figure 1 As shown, the filter system in this embodiment includes a dust box 2, a filter 1, a driving mechanism 3, a baffle 4, a linkage mechanism 5, a wind speed detector, a humidity detector, a controller, and a memory, wherein the controller is electrically connected to the driving mechanism 3, the wind speed detector, and the humidity detector by signals. The controller can control the driving mechanism 3 to work, and can also obtain the detection data of the wind speed detector and the humidity detector, and calculate these detection data.

[0042] The dust box 2 in this embodiment has a cavity inside, which can accommodate dust, garbage, etc. The dust box 2 has an air inlet 21, an air outlet 22, and an opening 23. Specifically, the air inlet 21 and the air outlet 22 are both arranged on the side wall of the dust box 2, and the opening 23 is arranged on the end surface of the dust box 2. The air inlet 21 and the air outlet 22 are connected to the cavity to form an air duct at one end.

[0043] The filter 1 covers the opening 23 of the dust box 2. The filter 1 can filter the garbage passing through the dust box 2, separate the garbage from the air, and filter the garbage and dust while ensuring air permeability. In order to facilitate the installation of the filter 1, the filter 1 in this embodiment includes a frame 11 and a mesh body 12 arranged in the frame 11. The frame 11 supports the mesh body 12, and it is also convenient to use the frame 11 to embed the filter 1 in the opening 23.

[0044] The driving mechanism 3 is arranged on the dust box 2 and is drivingly connected to the filter 1, and is used to drive the filter 1 to flip. The driving mechanism 3 can flip the side of the filter 1 facing the inner cavity of the dust box 2 to the outside, so that the filter 1 can be easily cleaned. In addition, the driving mechanism 3 can also drive the filter 1 to reset.

[0045] The baffle 4 is movably arranged on the dust box 2 near the air outlet 22. The baffle 4 can drive the transmission of the driving mechanism 3 and the linkage mechanism 5 to move relative to the air outlet 22, so that the baffle 4 can cover a part of the area of ​​the air outlet 22, thereby reducing the area of ​​the air outlet 22. In this way, the purpose of regulating the air volume passing through the dust box 2 can be achieved. After the air outlet 22 is blocked, the air volume passing through the dust box 2 will be reduced accordingly, that is, the air volume passing through the filter 1 will be reduced.

[0046] The linkage mechanism 5 is arranged between the driving mechanism 3 and the baffle 4 , and when the driving mechanism 3 drives the filter screen 1 to flip, the baffle 4 is driven to move, thereby blocking a part of the air outlet 22 .

[0047] Specifically, the driving mechanism 3 in this embodiment includes a motor 31, a worm 32 connected to the driving end of the motor 31, and a turbine 33 meshing with the worm 32, and the filter 1 is connected to the turbine 33. Specifically, the frame 11 is connected to the turbine 33 through a connecting rod. In order to effectively support the connecting rod, a support seat can be provided on the dust box 2, and the connecting rod can be rotatably inserted into the support seat. When the filter 1 is driven to flip, the motor 31 is controlled to rotate forward, and the motor 31 drives the worm 32 to rotate. Based on the meshing transmission between the worm 32 and the turbine 33, the turbine 33 rotates synchronously with the filter 1. The flipping drive of the filter 1 can be realized by controlling the forward rotation time or rotation angle of the motor 31. If the motor 31 is reversed, the reset drive of the filter 1 can be realized.

[0048] The linkage mechanism 5 includes a moving seat 51 threadedly sleeved on the worm 32, and a connecting piece 52 is connected between the moving seat 51 and the baffle 4. When the motor 31 drives the worm 32 to rotate to realize the inversion of the filter screen 1, the moving seat 51 also moves on the screw accordingly, thereby driving the connecting piece 52 to move. Since the connecting piece 52 is connected to the baffle 4, the baffle 4 is driven to move accordingly, thereby causing the baffle 4 to move in the direction of covering the air outlet 22. In order to ensure the moving direction of the baffle 4, a guide groove can be set on the dust box 2 at a position corresponding to the air outlet 22, and the edge of the baffle 4 is limited in the guide groove to ensure the stability of the movement of the baffle 4.

[0049] The wind speed detector and the humidity detector are both arranged at the air outlet 22 of the dust box 2, wherein the wind speed detector can be a thermal anemometer, through which the wind speed distribution at different positions within the area of ​​the entire air outlet 22 can be detected. The humidity detector is used to detect the humidity at the air outlet 22. Since the air outlet 22 is located downstream of the filter 1, the wind speed detector and the humidity detector are used to detect the wind speed and humidity data in the air duct downstream of the filter 1.

[0050] The memory is connected to the controller by electrical signals. A control program is stored in the memory. The control program can be read and executed by the controller to implement the filter system working method as described below.

[0051] The aforementioned filter system can be applied to various cleaning machines with air ducts. When in use, the filter system is set on the air duct path. Specifically, the connection of the filter system on the air duct path is achieved through the aforementioned air inlet 21 and air outlet 22.

[0052] like Figure 2 As shown, the filter system can operate using the following filter system operating method, which specifically includes the following steps.

[0053] Detect the wind speed distribution data group on the air duct section downstream of the filter 1. In this real-time method, a wind speed detector is used to detect the wind speed distribution data group. Specifically, the wind speed distribution data group on the air duct section corresponding to the air outlet 22 of the dust box 2 is collected. The wind speed distribution data group includes wind speed values ​​at multiple positions distributed on the air duct section. The wind speed fluctuation is determined according to the wind speed value in the wind speed distribution data group, and whether the filter 1 is damaged is determined according to the wind speed fluctuation. In this embodiment, the method for determining whether the filter 1 is damaged is: obtaining the maximum wind speed value Vmax and the minimum wind speed value Vmin in the wind speed distribution data group. When calculating, any one of the following two calculation methods can be used for judgment. One of them is: calculate v1=Vmax / Vmin, compare v1 with the preset proportional threshold value v10, if v1>v10, it is determined that the filter 1 is damaged, otherwise it is determined that the filter 1 is not damaged. Another method is: calculate v2=Vmax-Vmin, compare v2 with a preset difference threshold v20, if v2>v20, it is determined that the filter 1 is damaged, otherwise it is determined that the filter 1 is not damaged.

[0054] When it is determined that the filter 1 is damaged, the working parameters downstream of the filter 1 in the air duct are detected and obtained, and the damage degree of the filter 1 is determined according to the working parameters and the wind speed data in the wind speed distribution data group. Different processing methods are adopted according to the damage degree of the filter 1, such as reminding to replace the filter 1, reducing the air volume passing through the filter 1, or not processing.

[0055] Based on the different working characteristics of different cleaning machines, different working parameters can be specifically selected for judgment, such as humidity data, turbidity data, etc. The working data used in this embodiment is humidity data, that is, the humidity data at the air outlet 22 of the dust box 2 is obtained by using the aforementioned humidity detector to detect as the working parameter of the filter 1 in the air duct described below.

[0056] Specifically, when judging whether the filter 1 is damaged, the method for judging the degree of damage of the filter 1 is as follows: detecting and obtaining the working parameter downstream of the filter 1 in the air duct as humidity data, and then obtaining the humidity function st composed of the humidity data changing with time; at the same time, calculating the wind speed average of the wind speed data in the wind speed distribution data group, and then obtaining the wind speed function vt composed of the wind speed average data changing with time; performing Fourier transform on the humidity function st and the wind speed function vt, and then obtaining the corresponding spectrum functions sw and vw respectively, and calculating the mutual correlation function fw=sw*vw. If the correlation coefficient x of the mutual function is greater than the set correlation threshold x0, fw is inversely Fourier transformed and decomposed into two main components f1 and f2, where f1>f2; calculating f=f1 / f2, and judging the degree of damage of the filter 1 based on f. In this embodiment, f is compared with a preset first threshold value f01 and a second threshold value f02, wherein f01<f02; if f<f01, it is determined that the filter 1 is slightly damaged, and no processing is performed, thereby avoiding unnecessary replacement of the filter 1 and avoiding the workflow of returning to the base station for fault reminders during operation, thereby improving work efficiency; if f01≤f≤f02, it is determined that the degree of damage to the filter 1 is general, and then the air volume passing through the filter 1 is controlled to be reduced. By reducing the air volume passing through the filter 1, further damage to the filter 1 can be reduced, its service life can be extended, its replacement cycle can be lengthened, and its use can be fully utilized; if f>f02, it is determined that the filter 1 is severely damaged, and then a control reminder is given to replace the filter 1, thereby avoiding affecting the cleaning effect and damaging the downstream fan.

[0057] The present invention also relates to a cleaning machine, comprising a body with an air duct, a fan arranged at the outlet end of the air duct, and a filter system as described above, wherein the filter system is arranged in the body, and the filter system is fluidly connected to a position upstream of the fan on the air duct path through an air inlet 21 and an air outlet 22 on a dust box 2.

[0058] The filter system working method of the present invention can detect the damage of the filter 1 and timely discover the damage of the filter 1. In addition, when the filter 1 is damaged, the damage degree of the filter 1 can be determined, and different treatment methods can be used according to different damage degrees to extend the service life of the filter 1 as much as possible and reduce the replacement frequency of the filter 1.

[0059] The filter system using the working method of the filter system can fully utilize the filter 1 on the basis of ensuring the use effect, thereby reducing the use cost.

[0060] The cleaning machine using the filter system makes use of the filter 1 more intelligently and makes the best use of it.

[0061] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A filter system working method, characterized in that: The filter system comprises a filter (1) arranged on the air duct path; Detecting a wind speed distribution data set on a cross section of the wind duct located downstream of the filter (1), determining wind speed fluctuations based on wind speed values ​​in the wind speed distribution data set, and determining whether the filter (1) is damaged based on the wind speed fluctuations; When determining that the filter (1) is damaged, detecting and acquiring working parameters downstream of the filter (1) in the air duct, and determining the degree of damage of the filter (1) based on the working parameters and the wind speed data in the wind speed distribution data group; According to the degree of damage of the filter (1), a reminder is given to replace the filter (1), reduce the air volume passing through the filter (1), or not perform any treatment.

2. The filter system working method according to claim 1, characterized in that: The method for judging whether the filter (1) is damaged is as follows: Obtain the maximum wind speed value Vmax and the minimum wind speed value Vmin in the wind speed distribution data group; Calculate v1=Vmax / Vmin, compare v1 with a preset proportional threshold v10, if v1>v10, determine that the filter (1) is damaged, otherwise determine that the filter (1) is not damaged; or Calculate v2=Vmax-Vmin, compare v2 with a preset difference threshold v20, if v2>v20, then determine that the filter (1) is damaged, otherwise determine that the filter (1) is not damaged.

3. The filter system working method according to claim 1 or 2, characterized in that: When judging whether the filter screen (1) is damaged, the method for judging the damage degree of the filter screen (1) is as follows: Detect and obtain the working parameters of the filter (1) downstream of the air duct as humidity data, and then obtain a humidity function s(t) composed of the humidity data changing with time; At the same time, the wind speed average value of the wind speed data in the wind speed distribution data group is calculated, and then the wind speed function v(t) formed by the wind speed average value data changing with time is obtained; Perform Fourier transform on humidity function s(t) and wind speed function v(t), and then obtain the corresponding spectrum functions s(w) and v(w) respectively, and calculate the cross-correlation function f(w)=s(w)*v(w). If the correlation coefficient x of the cross-function is greater than the set correlation threshold x0, perform inverse Fourier transform on f(w) and decompose it into two main components f1 and f2, where f1>f2; Calculate f=f1 / f2 and judge the damage degree of the filter (1) based on f.

4. The filter system working method according to claim 3, characterized in that: f is compared with a preset first threshold value f01 and a second threshold value f02, wherein f01<f02; if f<f01, it is determined that the filter (1) is slightly damaged, and no treatment is performed; if f01≤f≤f02, it is determined that the filter (1) is moderately damaged, and the air volume passing through the filter (1) is reduced; if f>f02, it is determined that the filter (1) is severely damaged, and a reminder is given to replace the filter (1).

5. A filter system, characterized in that: include A dust box (2) having an air inlet (21), an air outlet (22), and an opening (23); A filter (1) is arranged to cover the opening (23) of the dust box (2); A driving mechanism (3) is arranged on the dust box (2) and is drivingly connected to the filter screen (1), and is used to drive the filter screen (1) to flip; A baffle (4) is movably arranged on the dust box (2) near the air outlet (22); A linkage mechanism (5) is arranged between the driving mechanism (3) and the baffle (4), and when the driving mechanism (3) drives the filter (1) to flip, the baffle (4) is driven to move, thereby blocking a portion of the air outlet (22); A wind speed detector is arranged at the air outlet (22) of the dust box (2); A humidity detector is arranged at the air outlet (22) of the dust box (2); A controller, which is electrically connected to the driving mechanism (3), the wind speed detector, and the humidity detector; A memory is connected to the controller by electrical signals, wherein a control program is stored in the memory, and the control program can be read and executed by the controller to implement the filter system working method as claimed in any one of claims 1 to 4.

6. The filter system according to claim 5, characterized in that: The driving mechanism (3) comprises a motor (31), a worm (32) connected to the driving end of the motor (31), and a turbine (33) meshing with the worm (32), and the filter (1) is connected to the turbine (33).

7. The filter system according to claim 6, characterized in that: The filter screen (1) comprises a frame (11) and a mesh body (12) arranged in the frame (11); the frame (11) is connected to a turbine (33) via a connecting rod.

8. The filter system according to claim 6, characterized in that: The linkage mechanism (5) comprises a moving seat (51) threadedly sleeved on the worm (32), and a connecting piece (52) is connected between the moving seat (51) and the baffle (4).

9. The filter system according to claim 5, characterized in that: The air inlet (21) and the air outlet (22) are arranged on the side wall of the dust box (2), and the opening (23) is opened on the end surface of the dust box (2).

10. A cleaning machine, comprising a machine body having an air duct, and a fan arranged at the outlet end of the air duct, characterized in that: It also includes a filter system as claimed in any one of claims 5 to 9, wherein the filter system is arranged in the machine body, and the filter system is fluidly connected to a position upstream of the fan on the air duct path through an air inlet (21) and an air outlet (22) on the dust box (2).

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