Air purification system, camera device

Abstract

The application relates to an air purification system and a camera device. The air purification system comprises a shell with an air inlet and an air outlet; a fan arranged in the shell and used for driving air out of the air outlet; an air speed sensor arranged on the air outlet side of the fan; a filter screen arranged in the shell and at the air inlet; a cleaning device used for cleaning the air inlet surface of the filter screen; and a controller electrically connected to the air speed sensor, wherein the controller is used for controlling the working of the cleaning device. The air purification system can guarantee the use performance of the filter screen, prolong the service life of the air purification system, and reduce the maintenance frequency.

Description

Technical Field

[0001] This application relates to the field of camera technology, and in particular to air purification systems and camera equipment. Background Technology

[0002] Some cameras are designed for extended outdoor use to meet recording requirements. After prolonged outdoor operation, dust and dirt often accumulate on the outer surface of the viewing window, severely interfering with image quality.

[0003] These cameras are often operated unattended or under long-interval inspection conditions. To keep the outer surface of the viewing window clean, an air curtain dustproof system can be installed. By blowing airflow into the viewing window, dust and oil contamination are prevented. To ensure that the airflow itself is relatively clean, the air curtain dustproof system often includes a filter.

[0004] However, excessive dust can clog the filters, causing the air curtain to malfunction. It is hoped that the air curtain dust control system can have a longer service life, reducing the need for manual maintenance. Utility Model Content

[0005] Therefore, it is necessary to provide an air purification system and camera equipment to address at least one of the above-mentioned problems.

[0006] In a first aspect, this application provides an air purification system comprising: a housing having an air inlet and an air outlet; a fan disposed in the housing for driving air out of the air outlet; a wind speed sensor disposed on the air outlet side of the fan; a filter disposed in the housing and at the air inlet; a cleaning device for cleaning the air inlet surface of the filter; and a controller electrically connected to the wind speed sensor for controlling the operation of the cleaning device.

[0007] By incorporating a filter, the intake of dirty air can be filtered, and oil, dust, and other contaminants in the dirty air are intercepted and filtered out, ensuring that the air blown out by the air purification system is clean. By incorporating a cleaning device, a wind speed sensor, and a controller, dirt accumulated at the filter can be removed according to changes in airflow within the air purification system, ensuring smooth airflow through the filter. The air purification system of this application extends its service life and reduces maintenance frequency by ensuring the performance of the filter.

[0008] In some embodiments, the cleaning device includes a vibration motor connected to the filter.

[0009] This design allows the cleaning device to occupy less structural space, which helps to control the overall size of the air purification system, making it more compact or smaller and better suited to limited installation space.

[0010] In some embodiments, the cleaning device includes a plurality of vibrating motors bonded to a filter screen, the vibrating motors being spaced apart from the periphery of the filter screen.

[0011] This setting helps to improve the vibration effect of the vibration motor on the filter.

[0012] In some embodiments, an air purification system is used to mount on a camera, with an air inlet facing the camera and configured to be spaced apart from the camera. The housing has an air chamber located above the filter screen, with the air inlet side of a fan communicating with the air chamber, and an air outlet for blowing air into the camera's viewing window. The air purification system also includes a rectifier screen disposed at the air outlet.

[0013] With this setup, the air purification system can be well integrated with the camera, forming a clean air curtain in the viewfinder to prevent the outer surface of the viewfinder from coming into contact with dirty air, thus ensuring the camera's shooting performance.

[0014] In some embodiments, the cleaning device includes a dust scraper, one side of which is used to clean the air intake surface of the filter, and the other side of which is used to clean the top surface of the camera.

[0015] This design ensures a good structural appearance; it can clean the filter and the camera, making one dust wiper a multi-functional device.

[0016] In some embodiments, the cleaning device includes at least one cleaning fan disposed outside the air inlet, with the airflow direction of the cleaning fan deviating from the air outlet.

[0017] This setup allows for cleaning of the camera, preventing dust from flowing through the air vents and viewing window; it also helps in cleaning the filter.

[0018] In some implementations, the controller is configured to control the cleaning device to operate in response to a measured wind speed from a wind speed sensor being less than a first threshold, wherein the first threshold is the value of the effective wind speed of the air purification system.

[0019] With this setup, the air purification system, equipped with a wind speed sensor and a cleaning device, can self-clean the filter.

[0020] In some implementations, the controller is used to control the rotation of the fan.

[0021] For example, the controller is configured to: control the fan to stop rotating in response to the cleaning device operating; control the fan to rotate in response to the cleaning device stopping operating; increase the duty cycle of the pulse width modulation signal applied to the fan in response to the measured wind speed of the wind speed sensor being less than a first threshold so that the measured wind speed of the wind speed sensor is greater than a second threshold, wherein the second threshold is the wind speed value of the fan based on a predetermined duty cycle when the filter is cleaning, and the second threshold is greater than the first threshold; the step of controlling the cleaning device to operate is performed after the duty cycle is 100%; after the cleaning device operates, decrease the duty cycle of the pulse width modulation signal applied to the fan in response to the measured wind speed of the wind speed sensor being greater than a third threshold so that the measured wind speed of the wind speed sensor is less than or equal to the third threshold, and the third threshold is greater than the second threshold.

[0022] With this setup, the air purification system, equipped with a controller and a fan, can control the fan's rotation.

[0023] In some implementations, the controller is configured to: after the cleaning device has operated a predetermined number of times, in response to the measured wind speed of the wind speed sensor being less than a second threshold but greater than a fourth threshold, control the fan to continue operating, wherein the fourth threshold is greater than the first threshold; and after the cleaning device has operated a predetermined number of times, in response to the measured wind speed of the wind speed sensor being less than the fourth threshold, issue an alarm notification.

[0024] This setup allows for preparation time when the air purification system needs maintenance, which is beneficial for the continuous and reliable use of the air purification system.

[0025] Secondly, this application also provides a camera device, which includes: a camera including a viewing window; and the aforementioned air purification system for blowing air into the viewing window.

[0026] The camera device provided in this application can keep the viewing window clean, which is beneficial for capturing clear images; it can also adapt to outdoor use environments for a long time. Attached Figure Description

[0027] Figure 1 This is a schematic assembly structure diagram of a camera device according to one or more embodiments;

[0028] Figure 2 A schematic exploded view of a camera device according to one or more embodiments;

[0029] Figure 3 This is a schematic diagram of the relationships of an air cleaning system according to one or more embodiments;

[0030] Figure 4 A schematic front view of a camera device according to one or more embodiments;

[0031] Figure 5 for Figure 4 A schematic sectional view at section AA;

[0032] Figure 6 for Figure 4 A schematic sectional view at section BB;

[0033] Figure 7 for Figure 4 A schematic sectional view at the CC section;

[0034] Figure 8 This is a schematic structural block diagram of a camera device according to one or more embodiments;

[0035] Figure 9 This is a schematic diagram of the structure of a cleaning fan and a camera according to one or more embodiments;

[0036] Figure 10 This is a schematic structural diagram of a camera device according to one or more embodiments;

[0037] Figure 11 This is a schematic flowchart of a self-cleaning method according to one or more embodiments;

[0038] Figure 12 This is a schematic structural block diagram of a self-cleaning device according to one or more embodiments;

[0039] Figure 13 A schematic application environment diagram of a self-cleaning method according to one or more embodiments;

[0040] Figure 14 This is a schematic internal structure diagram of a computer device according to one or more embodiments.

[0041] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Air inlet; 102. Air outlet; 103. Air chamber; 110. Upper housing; 120. Cover plate; 2. Fan; 3. Wind speed sensor; 4. Filter; 5. Cleaning device; 51. Vibration motor; 52. Cable; 53. Dust scraper; 54. Cleaning fan; 6. Rectifier screen; 7. Controller;

[0042] 100. Air purification system; 200. Camera; 210. Window; 300. Terminal; 400. Server; 500. Self-cleaning device; 510. Working module; 520. Comparison module; 530. Speed-up module; 540. Speed-down module; 550. Alarm module; 1000. Camera equipment; 1010. Top cover. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. For example, a first vibration motor may also be referred to as a second vibration motor, and a second vibration motor may also be referred to as a first vibration motor. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a flexible connection or a rigid connection along at least one direction; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium, or a direct connection with an intermediate medium present; and they can also refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. The terms "installed," "set," "fixed," etc., can be broadly understood as connection. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0048] refer to Figure 1 , Figure 1 A camera device according to an embodiment of this application is shown. In an exemplary embodiment, the camera device 1000 includes a camera 200 and an air purification system 100.

[0049] Camera 200 is capable of capturing images or videos, where video can be considered as a continuous sequence of images. Camera 200 may include a viewport 210, and may also include an optical lens, an image sensor, etc., to capture images of external objects through the viewport 210. Camera 200 may include other detectors.

[0050] The air purification system 100 is disposed on the camera 200, for example, substantially stacked above the camera 200. In other embodiments, it may also be disposed beside the camera, for example, along the X-axis or Y-axis. The air purification system 100 may have air ducts, see reference. Figure 1 The airflow path shown allows air to flow along the air duct. The air purification system 100 may have an air outlet 102, which may be located on the upper side of the viewing window 210, with the air outlet direction roughly along the Z-axis.

[0051] When the air purification system 100 is operating, it can form an air curtain in front of the viewing window 210 to prevent external dust, oil, and other contaminants from contacting the viewing window 210. At the same time, the airflow blown by the air purification system 100 itself needs to be cleaned.

[0052] refer to Figure 2 and Figure 3 The air purification system 100 provided in this application embodiment may include a housing 1, a fan 2, a wind speed sensor 3, a filter 4, a cleaning device 5, and a controller 7.

[0053] The housing 1 has an air inlet 101 and an air outlet 102. The housing 1 may include an upper shell 110 and a cover plate 120, which may be fixedly connected or detachably connected. The housing 1 may also include other components. The housing 1 is used to mount other components. For example, the housing 1 may be provided with insertion holes for inserting a mounting post that mates with the camera 200.

[0054] Fan 2 is disposed on housing 1 and is used to drive air out of air outlet 102. Fan 2 may be located above viewing window 210. Air purification system 100 may include one fan 2 or a combination of multiple fans 2.

[0055] The wind speed sensor 3 is located on the air outlet side of the fan 2 and can measure the wind speed.

[0056] Filter 4 is installed in the housing 1 and located at the air inlet 101. Filter 4 filters the dirty air drawn in by the air purification system 100, intercepting and filtering out oil, dust, and other contaminants in the dirty air. Simultaneously, the intercepted objects often adhere to the filter 4, reducing the airflow that can enter through the air inlet 101. Under the same operating conditions, the fan 2 experiences a decrease in air velocity on the outlet side, consequently reducing the air velocity at the outlet 102. Filter 4 ensures that the air blown out by the air purification system 100 is clean; however, if the air velocity is too low, the air curtain effect may be insufficient.

[0057] The cleaning device 5 is used at least to clean the air intake surface of the filter screen 4. Furthermore, the cleaning device 5 is used to clean the filter screen 4. The cleaning device 5 can clean the filter screen 4 using at least one method such as scraping dust, blowing dust back with air, or vibrating the filter screen 4.

[0058] The controller 7 is electrically connected to the wind speed sensor 3, and can also be electrically connected to the cleaning device 5. The controller 7 controls the operation of the cleaning device 5. Based on the wind speed changes measured by the wind speed sensor 3, the controller 7 controls the cleaning device 5 to remove dirt accumulated on the filter 4, ensuring smooth airflow through the filter 4 and maintaining the air curtain condition at the air outlet 102. By extending the service life of the filter 4 or reducing the maintenance frequency, the service life of the air purification system 100 is increased and the maintenance frequency is reduced.

[0059] Combination Figure 2 As shown. Controller 7 is used to control the rotation of fan 2, such as controlling rotation speed, rotation time, and rotation frequency. Controller 7 is electrically connected to fan 2, specifically, it can be electrically connected to a motor driver.

[0060] The filter screen 4 can be generally rectangular, and the air intake surface can be flat. The filter screen 4 can be detachably attached to the housing 1. For example, the filter screen 4 can be removed and installed from the side of the housing 1 along the X-axis.

[0061] In some embodiments, the cleaning device 5 includes a vibration motor 51 connected to the filter 4. The air inlet surface of the filter 4 may face downwards, for example, it may be tilted to a certain extent. When the vibration motor 51 vibrates, the dust adhering to the filter 4 falls off, and after vibration, the air permeability of the filter 4 can be partially restored. The vibration motor 51 is small in size and has a small range of motion, thus occupying little space; in addition, it is easy to assemble. The air purification system 100 is compact or even smaller in size, making it easy to install.

[0062] The vibration motor 51 can be attached to the filter screen 4, effectively vibrating the filter screen 4. The periphery of the filter screen 4 can be fixed to the housing 1, and the vibration motor 51 can be spaced apart from the periphery of the filter screen 4. The filter screen 4 achieves a drum-like vibration, which can shake off dust, resulting in a good vibration effect.

[0063] The cleaning device 5 may include multiple vibration motors 51 adhered to the filter 4. The multiple vibration motors 51 may be distributed substantially evenly along the air intake surface. For example... Figure 2 The cleaning device 5 may include six vibration motors 51 arranged in two rows. The cleaning device 5 may include cables 52, which are electrically connected to the vibration motors and also electrically connected to the controller 7. The cables 52 ensure the transmission of electrical signals and also ensure the vibration of the filter 4.

[0064] An air purification system 100 can be installed on a camera 200, with an air inlet 101 facing the camera 200. The air inlet 101 is configured to be spaced from the camera 200, allowing air to enter while reducing the risk of large foreign objects falling into the air inlet 101. For example, the projection of the air inlet 101 along the Z-axis can fall entirely within the projection area of ​​the camera 200, resulting in a small size for both the air purification system 100 and the camera device 1000.

[0065] refer to Figure 4 and Figure 5 The housing 1 has an air chamber 103 located above the filter 4. The filter 4 has fine pores, and the air chamber 103 helps to gather clean air. The airflow at the filter 4 can be generally upward, and the air chamber 103 helps to change the airflow direction to horizontal. (Reference) Figure 6 The air intake side of fan 2 is connected to air chamber 103.

[0066] refer to Figure 7 The air outlet 102 is used to blow air into the viewing window 210 of the camera 200. The air purification system 100 may also include a rectifier net 6, which is disposed at the air outlet 102. The air purification system 100 can form a clean air curtain in the viewing window 210 to prevent the outer surface of the viewing window 210 from contacting dirty air, thus ensuring the shooting performance of the camera 200. The wind speed sensor 3 can be disposed on the windward side of the rectifier net 6, which helps to avoid interfering with the air curtain state on the air outlet side of the rectifier net 6.

[0067] In other embodiments, the cleaning device 5 includes a back-blowing fan (not shown), which may be located in the air chamber 103, bypassing the main air duct. The back-blowing fan is used to blow a reverse airflow, i.e., an airflow from the inside to the outside of the housing 1, onto the filter 4, which helps to blow away dust.

[0068] refer to Figure 8 In some embodiments, the cleaning device 5 includes a dust scraper 53. The dust scraper 53 may include a brush. The dust scraper 53 may be located below the filter 4 and can be used to clean the air intake surface of the filter 4. The upper side of the dust scraper 53 can be used to clean the air intake surface of the filter 4, while the lower side of the dust scraper 53 can be used to clean the top surface of the camera 200. The housing 1 and the filter 4 can maintain a good structural configuration relative to the camera 200. The filter 4 and the camera 200 can be cleaned simultaneously with one operation of the dust scraper 53.

[0069] refer to Figure 9 The cleaning device 5 also includes at least one cleaning fan 54, which can be used in conjunction with a vibration motor 51, etc. The cleaning fan 54 can be located in the housing 1, and its operating frequency can be very low. The cleaning fan 54 is located outside the air inlet 101, and its airflow direction is offset from the air outlet 102, for example, along the X-axis away from the air outlet 102 and the viewing window 210. The cleaning fan 54 can clean the camera 200, preventing dust from flowing through the air outlet 102 and the viewing window 210. The cleaning fan 54 also helps clean the filter 4.

[0070] refer to Figure 10 The imaging device 1000 provided in this application embodiment may include a camera 200 and an air purification system 100. The air purification system 100 is used to blow air into the viewing window 210 of the camera 200, which can form an air curtain. The imaging device 1000 can keep the viewing window 210 clean, which is beneficial for capturing clear images; it can adapt to outdoor use environments for a long time.

[0071] The top surface of the camera 200 may have a slope.

[0072] The camera device 1000 may include a top cover 1010. The top cover 1010 may cover the air purification system 100, and its lower edge may be lower than the air purification system 100, and further, lower than the top surface of the camera 200. A gap is left at the lower edge of the top cover 1010 to ensure air intake for the air purification system 100, and also to provide a certain degree of windproof, waterproof, dustproof, and impact-resistant protection. The top cover 1010 can be rotatably connected to the camera 200.

[0073] A controller 7 can be configured according to the components of the air purification system 100. The controller 7 is capable of obtaining the measured wind speed from different measurements by the wind speed sensor 3; the controller 7 is capable of controlling the cleaning device 5 to operate and stop. For example, the controller 7 is capable of controlling the fan 2.

[0074] refer to Figure 11 For a specific air purification system 100, when the measured wind speed of the wind speed sensor 3 is the first threshold V1, an effective air curtain can be formed. The first threshold is the value of the effective wind speed of the air purification system 100.

[0075] The controller 7 can be configured to control the cleaning device 5 to operate in response to the measured wind speed of the wind speed sensor 3 being less than a first threshold V1. This means that dust has accumulated and clogged the filter 4. The air purification system 100, equipped with the wind speed sensor 3 and the cleaning device 5, can self-clean the filter 4, which helps to raise the measured wind speed above the first threshold.

[0076] When controller 7 controls the rotation of fan 2, controller 7 is configured to: stop fan 2 from rotating in response to cleaning device 5 operating; and rotate fan 2 in response to cleaning device 5 stopping operating. When cleaning device 5 is operating, fan 2 stops, which facilitates better dust removal and restores clogged and damaged filter 4 to a usable state.

[0077] When the fan 2 can be controlled by adjusting the duty cycle of the pulse width modulation signal, a duty cycle can be selected as a predetermined duty cycle, so that the measured wind speed of the wind speed sensor 3 is the second threshold V2, and the value of V2 is greater than the value of V1. Specifically, the second threshold is the wind speed value of the fan 2 based on the predetermined duty cycle when the filter 4 is in a clean state.

[0078] The controller 7 is configured to, in response to the measured wind speed of the wind speed sensor 3 being less than a first threshold, increase the duty cycle of the pulse width modulation signal acting on the fan 2 so that the measured wind speed of the wind speed sensor 3 is greater than a second threshold. Typically, dust accumulation gradually increases with usage time. When dust accumulation is minimal but causes the wind speed to drop below the effective wind speed, the duty cycle can be increased first, allowing the fan 2 to operate continuously without stopping, thus ensuring the effectiveness of the air curtain.

[0079] The controller 7 is configured to execute the step of controlling the cleaning device 5 to operate after the duty cycle reaches 100%. As dust accumulates, the cleaning device 5 can remove dust from the filter 4 after the duty cycle reaches 100% or another preset value. In the early stages of the air purification system 100's lifespan, the cleaning device 5 tends to clean more thoroughly. Since the duty cycle is increased before cleaning, after the cleaning device 5 operates, the measured wind speed of the wind speed sensor 3 can exceed the third threshold V3, where V3 is greater than V2.

[0080] The controller 7 is configured to, after the cleaning device 5 operates, reduce the duty cycle of the pulse width modulation signal acting on the fan 2 in response to the measured wind speed of the wind speed sensor 3 being greater than the third threshold V3, so that the measured wind speed of the wind speed sensor 3 is less than or equal to the third threshold. The air purification system 100 can control the rotation of the fan 2, for example, to maintain operation in a more economical manner; in addition, it helps to reduce the rate of dust accumulation.

[0081] As usage time increases, filter 4 will also accumulate some dirt that is difficult to clean. As a result, after each cleaning, the airflow speed will be difficult to maintain at a high level and will gradually remain below the third threshold value, and further below the second threshold value.

[0082] The controller 7 is configured to, after the cleaning device 5 has operated a predetermined number of times, control the fan 2 to continue operating in response to the measured wind speed of the wind speed sensor 3 being less than a second threshold but greater than a fourth threshold V4. The fourth threshold, being greater than the first threshold, can be referred to as the alarm threshold. The predetermined number of times the cleaning device 5 has operated can be selected through experimental measurement.

[0083] The controller 7 is configured to issue an alarm notification after the cleaning device 5 has operated a predetermined number of times, in response to the measured wind speed of the wind speed sensor 3 being less than a fourth threshold. This allows for preparation time when the air purification system 100 needs maintenance, which is beneficial for the continuous and reliable use of the air purification system 100.

[0084] This application provides a self-cleaning method S2000.

[0085] Step S210: In response to the wind speed measured by the wind speed sensor being less than a first threshold, control the cleaning device to operate. Specifically, step S210 may include: starting the filter cleaning program; turning off the fan and turning on the cleaning device; turning off the cleaning device and turning on the fan.

[0086] The method S2000 may include multiple steps S220, such as obtaining the measured wind speed of the wind speed sensor or the wind speed at the outlet; and comparing the wind speed at the outlet with the threshold value.

[0087] Before step S210, step S220 may include: comparing the measured wind speed from the anemometer with a first threshold. If the measured wind speed is smaller, then step S210 is executed. If the measured wind speed is larger, operation can continue, the outlet wind speed can be continuously acquired, and the comparison result can be confirmed to ensure that the measured wind speed is still larger in order to continue operation.

[0088] When the fan can be controlled by adjusting the duty cycle of the pulse width modulation signal, step S230 may be included.

[0089] If the measured wind speed is less than V1, the duty cycle can be increased first. Step S230 includes: increasing the fan speed duty cycle by one level. After each increase, the outlet wind speed can be compared with the first threshold. If the measured wind speed is consistently less than V1, it indicates severe blockage. Step S210 is only executed after the duty cycle reaches the set upper limit.

[0090] If, after upgrading, V1 < measured speed < V2, the system will continue running and continuously monitor the fan duty cycle. The speed difference can be configured to prevent the speed from exceeding V2 after upgrading. As running time increases, the filter will gradually become clogged, and the airflow speed at the outlet will decrease to below V1.

[0091] After step S210, step S220 may include: comparing the outlet air velocity with the magnitude of the third threshold.

[0092] If the speed is high, step S240 can be executed to reduce the fan speed by one level. Step S220 may include: comparing the outlet airflow speed with the second threshold; if high, continue to reduce the speed; if V1 < measured speed < V2, then execute the step of obtaining the fan duty cycle. The speed difference can be configured, and reducing the speed can prevent it from falling below V1 in one step.

[0093] If the blockage is small, it can maintain operation. However, when the blockage is severe, it becomes difficult to achieve an outlet air velocity of V3 or higher.

[0094] For example, after a predetermined number of cleaning cycles, if the outlet air velocity is lower than a third threshold, the outlet air velocity can be compared with a fourth threshold. If it is lower, step S250 can be executed to issue an alarm and notify relevant personnel for maintenance. If it is higher, operation can continue, and the velocity will naturally drop below V4.

[0095] refer to Figure 12 Based on the same concept, embodiments of this application also provide a self-cleaning device for implementing the self-cleaning method described above. Specific limitations thereof will not be repeated here.

[0096] In an exemplary embodiment, the self-cleaning device 500 may include a working module 510 for performing step S210.

[0097] The self-cleaning device 500 may further include a comparison module 520 for performing step S220. The comparison module 520 may include a first comparison unit for comparing a first threshold; a second comparison unit for comparing a second threshold; a third comparison unit for comparing a third threshold; and a fourth comparison unit for comparing a fourth threshold.

[0098] The self-cleaning device 500 may also include a speed-up module 530 for performing step S230. The speed-up module 530 may include a duty cycle acquisition unit, a duty cycle shift unit, and an upper limit determination unit.

[0099] The self-cleaning device 500 may also include a speed reduction module 540 for performing step S240.

[0100] The self-cleaning device 500 may also include an alarm module 550 for performing step S250.

[0101] Each module in the self-cleaning device 500 described above can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0102] refer to Figure 13 This application provides a computer device, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 14 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and databases. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a self-cleaning method.

[0103] For example, terminal 300 can be connected to server 400 via a communication network. Camera 200 can also be connected to server 400. Server 400 can be connected to a data storage system. Server 400 can be connected to multiple terminals 300 and multiple cameras 200. The data storage system can store images, maintenance records, and other data.

[0104] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0105] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0106] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0107] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0108] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0109] The technical features of the above-disclosed embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] In the embodiments disclosed above, unless otherwise explicitly specified and limited, the execution order of each step is not restricted. For example, they can be executed in parallel or sequentially in different orders. The sub-steps of each step can also be executed alternately. Various forms of processes described above can be used, and steps can be reordered, added, or deleted, as long as the desired result of the technical solution provided in this application can be achieved, and this application does not impose any restrictions here.

[0111] The embodiments disclosed above merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of patent protection claimed by this application. Therefore, the scope of patent protection of this application should be determined by the appended claims.

Claims

1. An air purification system, characterized in that, The air purification system includes: The housing has an air inlet and an air outlet; A fan, disposed in the housing, is used to drive air out of the air outlet; A wind speed sensor is installed on the air outlet side of the fan; A filter screen is disposed in the housing and at the air inlet; A cleaning device for cleaning the air intake surface of the filter; and A controller, electrically connected to a wind speed sensor, is used to control the operation of the cleaning device. The controller is configured to control the cleaning device to operate in response to the measured wind speed of the wind speed sensor being less than a first threshold, wherein the first threshold is the value of the effective wind speed of the air purification system.

2. The air purification system according to claim 1, characterized in that, The cleaning device includes a vibration motor connected to the filter.

3. The air purification system according to claim 2, characterized in that, The cleaning device includes multiple vibration motors adhered to the filter screen, with the vibration motors spaced apart from the periphery of the filter screen.

4. The air purification system according to claim 1, characterized in that, The air purification system is used to install on the camera, the air inlet faces the camera and is configured to be spaced apart from the camera, the housing has an air cavity located above the filter screen, the air inlet side of the fan communicates with the air cavity, and the air outlet is used to blow air into the camera's viewing window; The air purification system also includes a rectifier screen, which is located at the air outlet.

5. The air purification system according to claim 4, characterized in that, The cleaning device includes a dust scraper, one side of which is used to clean the air intake surface of the filter, and the other side of which is used to clean the top surface of the camera.

6. The air purification system according to claim 4, characterized in that, The cleaning device includes at least one cleaning fan, which is located outside the air inlet and the air blowing direction of the cleaning fan is deviated from the air outlet.

7. The air purification system according to claim 1, characterized in that, The controller is used to control the rotation of the fan; The controller is configured to: In response to the cleaning device operating, the fan is controlled to stop rotating; in response to the cleaning device stopping operating, the fan is controlled to rotate. In response to the measured wind speed of the wind speed sensor being less than a first threshold, the duty cycle of the pulse width modulation signal applied to the fan is increased so that the measured wind speed of the wind speed sensor is greater than a second threshold, wherein the second threshold is the wind speed value of the fan based on a predetermined duty cycle when the filter is in a clean state, and the second threshold is greater than the first threshold. The step of controlling the operation of the cleaning device is performed after the duty cycle is 100%; After the cleaning device is activated, in response to the measured wind speed of the wind speed sensor being greater than a third threshold, the duty cycle of the pulse width modulation signal acting on the fan is reduced so that the measured wind speed of the wind speed sensor is less than or equal to the third threshold, wherein the third threshold is greater than the second threshold.

8. The air purification system according to claim 7, characterized in that, The controller is configured to: After the cleaning device has operated a predetermined number of times, in response to the wind speed measured by the wind speed sensor being less than a second threshold but greater than a fourth threshold, the fan is controlled to continue operating, wherein the fourth threshold is greater than the first threshold. After the cleaning device has operated for the predetermined number of times, it issues an alarm notification in response to the measured wind speed of the wind speed sensor being less than the fourth threshold.

9. A camera device, characterized in that, include: Camera, including the viewport; and The air purification system as described in any one of claims 1 to 8 is used to blow air into the window.

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