Automatic cleaning system of fresh air duct filter

Abstract

The invention relates to an automatic cleaning system of a fresh air duct filter, which can improve air in an air duct and effectively improve air quality through a specific turbulent flow bulge structure, destroy a coherent vortex structure and reduce air resonance, is convenient to disinfect, convenient to use and simple to operate, greatly improves the cleanliness in the air duct, effectively kills viruses, and improves the air quality. Regeneration is prevented, and excellent surrounding environment is guaranteed. And the cleaning structure is ingenious in design, the rotary nozzles are pressurized, the filter screen can be flushed in all directions, cleaning without dead corners is ensured, and the cleaning efficiency is greatly improved. Water pressure driving is provided by means of an existing water supply system, and a manual and automatic dual-control mode is matched, so that the equipment cost is reduced, cleaning can be flexibly started according to actual requirements, and accurate and efficient cleaning operation is achieved. Due to the design of gravity settling collection and simple filtering recovery, large particles are effectively intercepted, blockage is avoided, and environment friendliness and convenience are achieved. The modular design enables maintenance and inspection to be easier, and maintenance cost and difficulty are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air duct filtering, and in particular to an automatic cleaning system for a fresh air duct filter. Background Art

[0002] Fresh air systems are used to replace fresh air in confined spaces. They are commonly used in homes, public places, factories, and data centers (such as 5G base stations). Fresh air systems must be able to both refresh outdoor air indoors and filter and purify it. Communication base stations are small in size and generate a relatively high amount of heat per unit area, typically measuring 30-40 square meters. Currently, base stations are equipped with fresh air systems to maintain the equipment within the room within a normal operating temperature range. Common fresh air systems for base stations primarily consist of fans, filters, and other components. These filters need to be replaced after a period of use, requiring regular maintenance and cleaning. However, most base stations are located in remote areas with harsh conditions and a wide distribution of mobile sites, making maintenance very demanding. Traditional manual cleaning requires workers to enter the air duct, which is limited by space and inconvenient to operate. It is also prone to missing areas and is inefficient. In terms of cleaning power and control, traditional manual cleaning relies on manual operation, making it difficult to precisely control time and intensity. Pollutant collection and treatment has always been a cumbersome step in manual cleaning, leading to secondary contamination and inconvenient cleanup.

[0003] In order to solve the above problems, the existing technology has already developed a fresh air system with a self-cleaning mechanism. The more common structure is as follows: Figure 1 As shown: a hose is connected to the dust suction fan, and the hose sucks the dust accumulated on the filter (filter screen) into the dust suction fan and then discharges it through another hose. However, the main disadvantages of this cleaning mechanism are: during the dust removal process, the hose must constantly move back and forth on the mesh surface of the filter screen, and the connection between the hose and the dust suction fan is prone to damage after a period of use; in the process of the hose moving back and forth with the dust suction fan, it is easy for the hose to have poor contact with the filter screen due to problems such as aging and deformation of the pipe, resulting in reduced dust collection efficiency or even failure to collect dust. In addition, after long-term use, the existing fresh air system will have serious hardening of the filter screen with smaller mesh, resulting in poor air circulation in the fresh air system and poor heat dissipation of the fresh air fan.

[0004] In order to ensure the efficient and energy-saving operation of the fresh air system and the indoor air quality, it is a better way to automatically clean the filter (filter screen) with liquids such as water, cleaning fluid and / or disinfectant. Some existing devices for cleaning the filter screen with liquid have the following defects: the entire surface is sprayed with liquid for cleaning simultaneously. Due to the large cross-section of the air duct, the water flow rate per unit time in the main spray pipe is large when multiple cleaning pipes are sprayed with liquid for cleaning at the same time. The water flow rate per unit time allowed by the municipal pipe network cannot meet the requirements, so a larger water storage tank needs to be set at the cleaning point; when only one cleaning pipe that can be lifted up and down for cleaning is used for cleaning, although it can be guaranteed that there is no water storage tank, a lifting drive mechanism needs to be set up, which is inconvenient to install, requires additional power consumption and has a high failure rate. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic cleaning system for a new air duct filter. By setting a humidity sensor in the air duct, the operation of the evaporator is controlled, the moisture in the evaporator and the air duct is blown dry, and the growth of mold in the air duct is prevented through double disinfection. This system is not only convenient for disinfection, but also does not require the disassembly of the evaporator, aiming to overcome the above-mentioned shortcomings in the prior art.

[0006] An automatic cleaning system for a new air duct filter includes an air duct 1 and an air damper 2. The air duct 1 is provided with a cavity, the front end of the cavity forming an air outlet, and the air damper 2 is rotatably disposed in the cavity and can open and close the air outlet. The system is characterized in that the air duct 1 is provided with an air damper drive mechanism 3 and a filter screen disposed in the cavity, the filter screen is provided with a group of flow-disturbing protrusions 5, and an evaporator device 6 is further provided in the cavity. The evaporator device 6 includes an evaporator body, a liquid collection tank 61 is fixedly provided at the bottom of the evaporator body, and a drain port 62 is connected to the bottom of the liquid collection tank 61. The cleaning system includes:

[0007] A signal acquisition module 41 is used to perform real-time detection on the filter in the air duct to obtain a sensing signal indicating that crops are attached to the filter;

[0008] a control module 42 connected to the signal acquisition module 41 and configured to generate an output signal when the sensing signal indicates the presence of attached crops;

[0009] a cleaning device driving module 43 connected to the control module 42 and configured to control the switch of the cleaning device according to the output signal;

[0010] a power supply unit 44, connected to the control module 42 and the cleaning device driving module 43, respectively, for providing power to the control module 42 and the cleaning device driving module 43;

[0011] The control module 42 includes:

[0012] A microcontroller chip is pre-set with multiple control pins. The operating voltage of the microcontroller chip is 2.5-4.8V, the operating current is 50-1350uA, and the operating frequency is 10.5-10.55GHz. The microcontroller chip is respectively connected to the power supply unit 44, the control module 42, the signal acquisition module 41, and the cleaning device drive module 43 through the multiple control pins.

[0013] A crystal oscillator is connected to the microcontroller chip via one of the control pins to provide a clock frequency for the microcontroller chip.

[0014] In one embodiment, the damper driving mechanism 3 includes a dial 31, a crank 32 and a connecting rod 33, wherein the dial 31 is rotatably arranged on one side of the air duct 1; the crank 32 is connected to the rotating shaft of the damper 2; one end of the connecting rod 33 is movably connected to the dial 31, and the other end is movably connected to the crank 32.

[0015] In one embodiment, the flow-disturbing protrusions 5 are evenly distributed at equal distances, and the flow-disturbing protrusions 5 are semi-conical and parallel to the filter surface.

[0016] In one embodiment, the number of the spoiler protrusions 5 is 3-7.

[0017] In one embodiment, guide grooves are provided on both side surfaces of the air duct 1, and six groups of guide grooves are equidistantly arranged.

[0018] In one embodiment, the cleaning device driving module 43 includes a signal receiver, which is signal-connected to the control module and is used to receive an operation signal for switching the working mode of the cleaning device, and switch the working mode of the cleaning device according to the operation signal.

[0019] The automatic cleaning system for a fresh air duct filter according to claim 5 is characterized in that the cleaning system further comprises a wireless communication module 45 and a user interface unit 46:

[0020] The user interface unit 46 is signal-connected to the control module 42 and serves as an input and output of the control module 42;

[0021] The wireless communication module 45 is connected to the mobile phone terminal APP by signal.

[0022] In one embodiment, the user interface unit 46 includes a switch module, a time setting module and a display device; the switch module is used by the operator to open and close the cleaning device, the time setting module is used by the operator to set the cleaning time and delay time, and the display device is used to display the current working status of the cleaning device and other information that needs to be displayed to the operator.

[0023] In one embodiment, the control module 42 includes a sensing module, a judgment module and a storage module: the sensing module is used to sense the user operation information input by the user interface unit 46; the judgment module is used to receive various input information, judge the current scene, and control the opening and closing of the cleaning device driving module 43 accordingly, and output the information to be displayed to the user interface unit 46; the storage module is used to store information.

[0024] The above technical solution has the following advantages or beneficial effects:

[0025] The automatic cleaning system of the new air duct filter of the present invention destroys the ordered vortex structure and reduces air resonance through a unique spoiler protrusion structure, which can improve the air in the air duct without affecting normal use and effectively improve the air quality. Through double disinfection, it is not only convenient for disinfection, but also does not need to disassemble the evaporator. It is easy to use and simple to operate, greatly improving the cleanliness of the air duct, effectively killing viruses, preventing regeneration, and ensuring the quality of the surrounding environment. In addition, the cleaning structure is cleverly designed, and the pressurized rotating nozzle can flush the filter in all directions to ensure cleaning without dead corners, greatly improving the cleaning efficiency. The present invention uses the existing water supply system of the subway to provide water pressure drive, and cooperates with manual and automatic dual control modes, which not only reduces equipment costs, but also can flexibly start cleaning according to actual needs, realizing accurate and efficient cleaning operations. The gravity sedimentation collection and simple filtration recovery design of this device automatically discharges sewage and effectively intercepts large particles to avoid blockage, which is environmentally friendly and convenient. The modular design makes maintenance and inspection easier and reduces maintenance costs and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying any creative work.

[0027] Figure 1 It is a structural schematic diagram of an automatic cleaning system for a fresh air duct filter of the present invention;

[0028] Figure 2 It is a signal connection diagram of the cleaning system of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the damper drive mechanism of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0033] The following is in conjunction with the instructions Figure 1 , the structural design of this device is described in detail.

[0034] The present invention provides an automatic cleaning system for a new air duct filter, comprising an air duct 1 and an air damper 2. The air duct 1 is provided with a cavity, the front end of the cavity forming an air outlet, the air damper 2 is rotatably disposed in the cavity and can open and close the air outlet, the air duct 1 is provided with an air damper drive mechanism 3 and a filter screen disposed in the cavity, the filter screen is provided with a group of flow-disturbing protrusions 5, and an evaporator device 6 is further provided in the cavity, the evaporator device 6 includes an evaporator body, a liquid collecting tank 61 is fixedly provided at the bottom of the evaporator body, and the bottom of the liquid collecting tank 61 is connected to a drain port 62. The cleaning system comprises:

[0035] The signal acquisition module 41 is used to perform real-time detection on the filter in the air duct to obtain a sensing signal indicating whether crops are attached to the filter surface. The signal acquisition module 41 detects the crops attached to the filter surface within the detection range in real time, obtains a sensing signal, and sends it to the control module 42. After receiving the sensing signal, the control module 42 first analyzes the sensing signal and compares the sensing signal with a preset threshold. If the sensing signal is less than the preset threshold, the cleaning device is activated; if the sensing signal is not less than the preset threshold, the cleaning device is not activated.

[0036] a control module 42 connected to the signal acquisition module 41 and configured to generate an output signal when the sensing signal indicates the presence of attached crops;

[0037] a cleaning device driving module 43 connected to the control module 42 and configured to control the switch of the cleaning device according to the output signal;

[0038] a power supply unit 44, connected to the control module 42 and the cleaning device driving module 43, respectively, for providing power to the control module 42 and the cleaning device driving module 43;

[0039] The control module 42 includes:

[0040] A microcontroller chip is pre-set with multiple control pins. The operating voltage of the microcontroller chip is 2.5-4.8V, the operating current is 50-1350uA, and the operating frequency is 10.5-10.55GHz. The microcontroller chip is respectively connected to the power supply unit 44, the control module 42, the signal acquisition module 41, and the cleaning device drive module 43 through the multiple control pins.

[0041] A crystal oscillator is connected to the microcontroller chip via one of the control pins to provide a clock frequency for the microcontroller chip.

[0042] The microcontroller chip adopts mature CMOS technology and makes full use of mixed analog-digital technology. It integrates a microwave transceiver, radar intermediate frequency amplifier circuit and signal processor on a single chip. It is a fully integrated SOC with good consistency and ultra-high cost performance compared with traditional radar sensing modules. The chip operates in the 10.5GHz to 10.55GHz frequency band by default, and the frequency is flexible and configurable. Due to the on-chip integrated adaptive calibration algorithm, it can effectively solve various interference problems, greatly improving the reliability and practicality of the sensor. The first microcontroller chip integrates LDO and adopts an ultra-low power architecture. Due to its low power consumption and support for a wide voltage range, it is directly powered by a battery and maintains a long standby time. The chip has an integrated signal processor that can directly output the sensing control signal. A complete microwave radar sensing sensor is formed by combining a small number of peripheral components.

[0043] Working principle: The microwave signal generated inside the chip is amplified and radiated through the antenna. The signal is reflected when it encounters an object in the air. When the object is in motion, there is a certain frequency difference between the reflected signal and the transmitted signal, which is the Doppler effect. By mixing the received reflected signal and the transmitted signal, the corresponding intermediate frequency signal can be obtained. By analyzing the intermediate frequency signal, the object's motion information can be inferred, thereby realizing the sensing function.

[0044] Furthermore, in a preferred embodiment of an automatic cleaning system for a new air duct filter of the present invention, the damper driving mechanism 3 includes a dial 31, a crank 32 and a connecting rod 33, the dial 31 being rotatably arranged on one side of the air duct 1; the crank 32 being connected to the rotating shaft of the damper 2; one end of the connecting rod 33 being movably connected to the dial 31, and the other end being movably connected to the crank 32.

[0045] Furthermore, in a preferred embodiment of the automatic cleaning system for a fresh air duct filter of the present invention, the spoiler protrusions 5 are evenly distributed at equal distances, and the spoiler protrusions 5 are semi-conical and parallel to the filter surface.

[0046] Furthermore, in a preferred embodiment of the automatic cleaning system for a fresh air duct filter of the present invention, the number of the spoiler protrusions 5 is 3-7.

[0047] Furthermore, in a preferred embodiment of the automatic cleaning system for a new air duct filter of the present invention, guide grooves are provided on both side surfaces of the air duct 1, and six groups of guide grooves are equidistantly arranged.

[0048] Furthermore, in a preferred embodiment of an automatic cleaning system for a fresh air duct filter of the present invention, the cleaning device driving module 43 includes a signal receiver, which is signal-connected to the control module, and is used to receive an operation signal for switching the working mode of the cleaning device, and switch the working mode of the cleaning device according to the operation signal.

[0049] Furthermore, in a preferred embodiment of the automatic cleaning system for a fresh air duct filter of the present invention, the cleaning system further includes a wireless communication module 45 and a user interface unit 46:

[0050] The user interface unit 46 is signal-connected to the control module 42 and serves as an input and output of the control module 42;

[0051] The wireless communication module 45 is connected to the mobile phone terminal APP by signal.

[0052] Furthermore, in a preferred embodiment of an automatic cleaning system for a fresh air duct filter of the present invention, the user interface unit 46 includes a switch module, a time setting module and a display device; the switch module is used by the operator to open and close the cleaning device, the time setting module is used by the operator to set the cleaning time and delay time, and the display device is used to display the current working status of the cleaning device and other information that needs to be displayed to the operator.

[0053] Furthermore, in a preferred embodiment of an automatic cleaning system for a fresh air duct filter of the present invention, the control module 42 includes a sensing module, a judgment module and a storage module: the sensing module is used to sense the user operation information input by the user interface unit 46; the judgment module is used to receive various input information, judge the current scene, and control the opening and closing of the cleaning device driving module 43 accordingly, and output the information to be displayed to the user interface unit 46; the storage module is used to store information.

[0054] During the cleaning process, the sewage is collected into the collecting tank 61 through the guide groove and discharged through the drain port 62. After cleaning with the detergent, the ultraviolet light of the ultraviolet lamp is used to greatly eliminate the bacteria generated on the evaporator body. The fan blows the atomized detergent into various parts of the internal cavity of the air duct 1 for cleaning, which not only makes cleaning convenient, but also greatly improves the cleanliness of the air duct and reduces the harm of mold.

[0055] The existing subway water supply system provides cleaning power. A simple water pressure conversion device is connected near the fresh air duct to direct water from the supply system into the cleaning device. The water pressure and flow rate are adjusted by controlling the opening of the water valve. The water flows through a specially designed nozzle, forming a powerful water column to flush the filter. This method eliminates the need for additional complex power equipment, reducing costs.

[0056] The system can be controlled in two ways: manual and automatic. Automatic control utilizes a pressure sensor, initiating the cleaning process when a certain threshold is reached. Manual control uses a single button, allowing staff to activate the cleaning system whenever needed. This allows for both routine automatic cleaning and manual intervention in special circumstances, resulting in simple, cost-effective operation.

[0057] A sloped sump 61 is located below the filter. Made of low-cost stainless steel or plastic, it allows for the removal of pollutants from the filter. When the filter is cleaned, pollutants flow into the sump along with the water. Due to the slope of the sump, wastewater and pollutants automatically flow toward one end of the sump, where they are connected to the subway's drainage system via a pipe for automatic discharge.

[0058] Install a simple filter on your drain pipe, using low-cost materials like coarse mesh or filter cotton. This filter can intercept larger particles of pollutants, preventing them from entering the drainage system and causing blockages. Regular cleaning of the filter is quick, convenient, and inexpensive.

[0059] The entire cleaning system is designed with multiple modular components, such as the control module and power module. Each module uses standardized interfaces, allowing for quick disassembly and replacement in the event of a malfunction. This reduces maintenance costs and improves repair efficiency.

[0060] In summary, the automatic cleaning system of the new air duct filter of the present invention destroys the ordered vortex structure and reduces air resonance through the unique spoiler protrusion structure, which can improve the air in the air duct without affecting normal use and effectively improve the air quality. Through double disinfection, it is not only convenient for disinfection, but also does not need to disassemble the evaporator. It is easy to use and simple to operate, greatly improving the cleanliness of the air duct, effectively killing viruses, preventing regeneration, and ensuring the quality of the surrounding environment. In addition, the cleaning structure is cleverly designed, and the pressurized rotating nozzle can flush the filter in all directions to ensure cleaning without dead corners, greatly improving the cleaning efficiency. The present invention uses the existing water supply system of the subway to provide water pressure drive, and cooperates with manual and automatic dual control modes, which not only reduces equipment costs, but also can flexibly start cleaning according to actual needs, realizing accurate and efficient cleaning operations. The gravity sedimentation collection and simple filtration recovery design of the device automatically discharges sewage and effectively intercepts large particles to avoid blockage, which is environmentally friendly and convenient. The modular design makes maintenance and inspection easier and reduces maintenance costs and difficulty.

[0061] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

[0062] In the description of the present invention, it should be understood that the terms "upper", "lower", "front" and "rear" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. An automatic cleaning system for a new air duct filter, comprising an air duct and an air door, wherein a cavity is provided in the air duct, an air outlet is formed at the front end of the cavity, and the air door is rotatably arranged in the cavity and can open and close the air outlet, characterized in that The air duct is provided with a damper drive mechanism and a filter screen disposed in the cavity, the filter screen being provided with a group of flow-disturbing protrusions. An evaporator device is also provided in the cavity, the evaporator device comprising an evaporator body, a liquid collecting tank being fixedly provided at the bottom of the evaporator body, and a liquid drain port being connected to the bottom of the liquid collecting tank. The cleaning system comprises: A signal acquisition module is used to perform real-time detection on the filter in the air duct to obtain a sensing signal indicating that crops are attached to the filter; a control module connected to the signal acquisition module and configured to generate an output signal when the sensing signal indicates the presence of an attached crop; a cleaning device driving module, connected to the control module, for controlling the switch of the cleaning device according to the output signal; a power supply unit, connected to the control module and the cleaning device driving module, respectively, for providing power to the control module and the cleaning device driving module respectively; The control module includes: A microcontroller chip is pre-set with multiple control pins. The operating voltage of the microcontroller chip is 2.5-4.8V, the operating current is 50-1350uA, and the operating frequency is 10.5-10.55GHz. The microcontroller chip is respectively connected to the power supply unit, the control module, the signal acquisition module, and the cleaning device drive module through the multiple control pins. A crystal oscillator is connected to the microcontroller chip via one of the control pins to provide a clock frequency for the microcontroller chip.

2. The automatic cleaning system for fresh air duct filter according to claim 1, characterized in that The damper driving mechanism includes a dial, a crank and a connecting rod. The dial can be rotatably arranged on one side of the air duct; the crank is connected to the rotating shaft of the damper; one end of the connecting rod is movably connected to the dial, and the other end is movably connected to the crank.

3. The automatic cleaning system for fresh air duct filter according to claim 2, characterized in that The spoiler protrusions are evenly distributed at equal distances, and the spoiler protrusions are semi-conical and parallel to the filter surface.

4. The automatic cleaning system for fresh air duct filter according to claim 3, characterized in that , the number of the spoiler protrusions is 3-7.

5. The automatic cleaning system for fresh air duct filter according to claim 1, characterized in that , guide grooves are provided on both side surfaces of the air duct, and there are 6 groups of guide grooves arranged at equal intervals.

6. The automatic cleaning system for fresh air duct filter according to claim 1, characterized in that The cleaning device driving module includes a signal receiver, which is signal-connected to the control module and is used to receive an operation signal for switching the working mode of the cleaning device, and switch the working mode of the cleaning device according to the operation signal.

7. The automatic cleaning system for fresh air duct filter according to claim 5, characterized in that , the cleaning system also includes a wireless communication module and a user interface unit: The user interface unit is signal-connected to the control module, serving as input and output of the control module; The wireless communication module signal is connected to the mobile phone terminal APP.

8. The automatic cleaning system for fresh air duct filter according to claim 7, characterized in that The user interface unit includes a switch module, a time setting module and a display device; the switch module is used by the operator to open and close the cleaning device, the time setting module is used by the operator to set the cleaning time and delay time, and the display device is used to display the current working status of the cleaning device and other information that needs to be displayed to the operator.

9. The automatic cleaning system for fresh air duct filter according to claim 1, characterized in that The control module includes a sensing module, a judgment module and a storage module: the sensing module is used to sense the user operation information input by the user interface unit; the judgment module is used to receive various input information, judge the current scene, and control the opening and closing of the cleaning device drive module accordingly, and output the information to be displayed to the user interface unit; the storage module is used to store information.

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