A carbon neutral air filtration system based on air purification

Abstract

The present invention relates to the field of filtering equipment, and in particular to a carbon-neutral air filtering system based on air purification, comprising: a workshop, an information collection module for collecting welding light intensity, smoke image information, and smoke concentration information, an air intake module for intake into the workshop, an air outlet module arranged at the middle of the side wall opposite to the air intake module, a filtering module arranged at the input end of the air outlet module and comprising a purification unit, an elastic pipe and a mobile unit, and a control module for determining a welding fume purification mode according to a filtering evaluation value, determining a welding fume purification strategy of the purification unit according to a first diffusion characteristic of the welding fume, and determining whether the welding fume purification meets a preset standard according to a second diffusion characteristic, thereby improving the air purification efficiency while reducing energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of filtering equipment, and in particular to a carbon-neutral air filtering system based on air purification. Background Art

[0002] The workshop air purification system is an important facility to ensure that the air cleanliness in the workshop meets the production requirements. The system filters, purifies and circulates the air in the workshop through a series of precision-designed and high-quality equipment to ensure a clean and stable production environment.

[0003] Chinese Patent Publication No.: CN113318532B, discloses an air purification system for a printing workshop, including an air intake device and an exhaust device. The air intake device is provided with a dust removal device, and an air compressor is provided at the outlet of the air intake device. The air compressor is used to compress the gas discharged by the air intake device. It also includes a control console and a gas internal circulation device. The gas internal circulation device is used to remove dust from the air inside the printing workshop. The control console is used to control the operation of the air intake device, the exhaust device, the air compressor and the gas internal circulation device. It can be seen that the technical solution lacks precise control of filtration, resulting in low air filtration efficiency and high energy consumption. Summary of the invention

[0004] To this end, the present invention provides a carbon-neutral air filtration system based on air purification, so as to overcome the problems in the prior art of lacking precise control of filtration, resulting in low air filtration efficiency and high energy consumption.

[0005] To achieve the above objectives, the present invention provides a carbon neutral air filtration system based on air purification, comprising:

[0006] workshop;

[0007] An information acquisition module, for collecting welding smoke information inside the workshop, comprising a first light intensity acquisition unit and a second light intensity acquisition unit respectively arranged on the top and side walls of the workshop for collecting welding light intensity, a first image acquisition unit arranged adjacent to the first light intensity acquisition unit for collecting smoke image information and a first smoke concentration acquisition unit for collecting smoke concentration information, and a second image acquisition unit arranged adjacent to the second light intensity acquisition unit for collecting smoke image information and a second smoke concentration acquisition unit for collecting smoke concentration information;

[0008] An air intake module, used for intake of air into the workshop, comprising a first air intake unit and a second air intake unit respectively arranged at the top and the bottom of one side wall of the workshop;

[0009] An air outlet module is disposed at the middle of the side wall opposite to the air inlet module;

[0010] A filter module, which is arranged at the input end of the air outlet module, comprises a purification unit for filtering welding fumes inside the workshop, an elastic pipe connecting the purification unit and the air outlet module, and a moving unit for controlling the vertical movement of the purification unit along the side wall of the workshop, wherein the moving unit comprises a slide rail vertically arranged on the side wall, a sliding block connected to the purification unit, and a stepping motor for controlling the movement of the sliding block on the slide rail;

[0011] A control module, which is respectively connected to the information acquisition module, the air intake module, the air outlet module and the filtering module, and is used to determine the welding fume purification mode according to the filtering evaluation value, to determine the welding fume purification strategy of the purification unit according to the first diffusion characteristic of the welding fume, and to determine whether the welding fume purification meets the preset standard according to the second diffusion characteristic.

[0012] Further, the control module determines the welding fume purification mode based on the filtering evaluation value, wherein:

[0013] The first welding fume purification mode is that the control module only uses the first outlet power to operate the outlet module; the first welding fume purification mode is determined by the filtering evaluation value being less than a preset filtering evaluation value;

[0014] The second welding fume purification mode is that the control module uses the second outlet power to operate the outlet module and uses the first inlet power to operate the first air intake unit or the second air intake unit; the second welding fume purification mode is determined by the filtering evaluation value being greater than or equal to the preset filtering evaluation value.

[0015] Furthermore, the filtering evaluation value is determined jointly based on the average intensity of welding light and the proportion of welding working time within the first preset time period.

[0016] Further, the control module determines the welding fume purification strategy of the purification unit based on the first diffusion characteristic of the welding fume in the second welding fume purification mode, wherein:

[0017] If the welding smoke floats up and spreads, the control module controls the purification unit to move to the initial point on the upper part of the slide rail and turns on the second air intake unit;

[0018] If the welding smoke is suspended and diffused, the control module controls the purification unit to move to the initial point in the middle of the slide rail, and turns on the first air intake unit and the second air intake unit;

[0019] If the welding smoke sinks and spreads, the control module controls the purification unit to move to the initial point at the bottom of the slide rail and turns on the first air intake unit;

[0020] Among them, the upper part of the guide rail, the middle part of the guide rail and the lower part of the guide rail have the same length and each initial point position is the midpoint position of the corresponding part.

[0021] Furthermore, the first diffusion feature is determined based on the position and distance of the midpoints of two smoke images collected by the second image collection unit at a second preset time interval, wherein:

[0022] If the midpoint of the next frame of smoke image is located above the midpoint of the previous frame of smoke image and the distance between the midpoint of the next frame of smoke image and the midpoint of the previous frame of smoke image is greater than the preset distance, it is determined that the first diffusion feature is the upward diffusion of welding smoke;

[0023] If the midpoint of the next frame of smoke image is located below the midpoint of the previous frame of smoke image and the distance between the midpoint of the next frame of smoke image and the midpoint of the previous frame of smoke image is greater than the preset distance, the first diffusion feature is determined to be welding smoke downward diffusion.

[0024] Furthermore, the control module determines whether the welding fume purification meets the preset standard according to the second diffusion characteristic under the condition that the welding fume floats and diffuses upward, wherein:

[0025] If the characteristic value of the second diffusion characteristic is less than the first preset characteristic threshold, the control module determines that the welding fume purification does not meet the preset standard, and increases the operating power of the gas outlet module according to the difference between the first preset characteristic threshold and the characteristic value of the second diffusion characteristic;

[0026] If the characteristic value of the second diffusion characteristic is greater than or equal to the first preset characteristic threshold and less than the second preset characteristic threshold, the control module determines that the welding fume purification does not meet the preset standard, and adjusts the position of the purification unit on the slide rail to a corresponding value according to the difference between the characteristic value of the second diffusion characteristic and the first preset characteristic threshold;

[0027] If the characteristic value of the second diffusion characteristic is greater than or equal to the second preset characteristic threshold, the control module determines that the welding fume purification meets the preset standard and continues to purify the welding fume;

[0028] The characteristic value of the second diffusion characteristic is the ratio of the lateral diffusion rate of welding smoke to the upward diffusion rate.

[0029] Furthermore, the increase amplitude of the operating power of the air outlet module is positively correlated with the characteristic difference, wherein the characteristic difference is the difference between the first preset characteristic threshold and the characteristic value of the second diffusion characteristic.

[0030] Furthermore, the control module is provided with a smoke warning threshold and corrects the preset filtering evaluation value when it is determined that the operation of the filtering system does not meet the preset standard according to the number of warnings within a preset time period.

[0031] Further, the control module records a warning in response to the smoke concentration being greater than the smoke warning threshold, wherein the smoke concentration is jointly determined by the first smoke concentration collection unit and the second smoke concentration collection unit.

[0032] Furthermore, the correction range of the preset filtering evaluation value is positively correlated with the frequency difference, wherein the frequency difference is the difference between the number of warnings within a preset time period and the warning frequency threshold.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides an air intake module that can be controlled to open and close and a purification unit that can move up and down, and at the same time provides an information collection module that collects welding light intensity, smoke image information, and smoke concentration information, so as to comprehensively determine the diffusion state of welding smoke, and determine the corresponding purification mode and strategy according to the diffusion state, thereby reducing filtration energy consumption and carbon emissions on the basis of achieving high-efficiency filtration, thereby achieving carbon neutrality in air filtration.

[0034] Furthermore, the present invention determines a filtering evaluation value based on the average intensity of welding light and the proportion of welding working time. The filtering evaluation value can accurately evaluate the initial concentration of welding smoke to accurately determine the corresponding welding fume purification mode, thereby selecting a low-power operation mode for low-concentration welding fume, effectively saving energy consumption.

[0035] Furthermore, the characteristic value of the second diffusion characteristic can be used to accurately verify whether the operation of the system is qualified after the welding fume purification mode and purification strategy are determined, and the corresponding system parameter operation strategy when it is unqualified can be determined.

[0036] Furthermore, the present invention also determines the corresponding preset filtration evaluation value through the historical smoke concentration, so as to continuously improve the operation of the system through self-learning, thereby further improving the filtration efficiency and reducing the filtration energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural schematic diagram of a carbon neutral air filtration system based on air purification according to an embodiment of the present invention;

[0038] Figure 2 This is a structural schematic diagram of a carbon neutral air filtration system based on air purification according to an embodiment of the present invention;

[0039] Figure 3 A flow chart of determining a welding fume purification mode based on a filtering evaluation value according to an embodiment of the present invention;

[0040] Figure 4 This is a flow chart of an embodiment of the present invention for determining whether welding fume purification meets a preset standard according to a second diffusion characteristic;

[0041] In the figure, 1, workshop; 21, first light intensity acquisition unit; 22, second light intensity acquisition unit; 23, first image acquisition unit; 24, first smoke concentration acquisition unit; 25, second image acquisition unit; 26, second smoke concentration acquisition unit; 31, first air intake unit; 32, second air intake unit; 4, air outlet module; 51, purification unit; 52, elastic pipe; 531, slide rail; 532, sliding block; 533, stepping motor. DETAILED DESCRIPTION

[0042] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] It should be pointed out that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical data of the control module of the present invention in the three months before this operation and the corresponding historical detection results. It can be understood by those skilled in the art that the determination method of the system of the present invention for the above-mentioned single parameter can be to select the value with the highest proportion as the preset standard parameter according to the data distribution, use weighted summation to use the obtained value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by the formula as the preset standard parameter or other selection methods, as long as the system of the present invention can clearly define the different specific situations in the single determination process through the obtained values.

[0044] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0045] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a structural schematic diagram of a carbon-neutral air filtration system based on air purification according to an embodiment of the present invention; a structural schematic diagram of a carbon-neutral air filtration system based on air purification according to an embodiment of the present invention; a flow chart of determining a welding fume purification mode based on a filtration evaluation value according to an embodiment of the present invention; and a flow chart of determining whether welding fume purification meets a preset standard according to a second diffusion characteristic according to an embodiment of the present invention.

[0046] An embodiment of the present invention provides a carbon neutral air filtration system based on air purification, comprising:

[0047] workshop;

[0048] An information acquisition module, for collecting welding smoke information inside the workshop, comprising a first light intensity acquisition unit and a second light intensity acquisition unit respectively arranged on the top and side walls of the workshop for collecting welding light intensity, a first image acquisition unit arranged adjacent to the first light intensity acquisition unit for collecting smoke image information and a first smoke concentration acquisition unit for collecting smoke concentration information, and a second image acquisition unit arranged adjacent to the second light intensity acquisition unit for collecting smoke image information and a second smoke concentration acquisition unit for collecting smoke concentration information;

[0049] An air intake module, used for intake of air into the workshop, comprising a first air intake unit and a second air intake unit respectively arranged at the top and the bottom of one side wall of the workshop;

[0050] An air outlet module is disposed at the middle of the side wall opposite to the air inlet module;

[0051] A filter module, which is arranged at the input end of the air outlet module, comprises a purification unit for filtering welding fumes inside the workshop, an elastic pipe connecting the purification unit and the air outlet module, and a moving unit for controlling the vertical movement of the purification unit along the side wall of the workshop, wherein the moving unit comprises a slide rail vertically arranged on the side wall, a sliding block connected to the purification unit, and a stepping motor for controlling the movement of the sliding block on the slide rail;

[0052] A control module, which is respectively connected to the information acquisition module, the air intake module, the air outlet module and the filtering module, and is used to determine the welding fume purification mode according to the filtering evaluation value, to determine the welding fume purification strategy of the purification unit according to the first diffusion characteristic of the welding fume, and to determine whether the welding fume purification meets the preset standard according to the second diffusion characteristic.

[0053] Specifically, the first light intensity collection unit and the second light intensity collection unit, such as light intensity sensors, are used to collect welding light intensity in a workshop without specific limitation.

[0054] Specifically, the first image acquisition unit and the second image acquisition unit are, for example, industrial cameras, which are not specifically limited, and are used to acquire smoke image information in a workshop.

[0055] Specifically, the first smoke concentration collection unit and the second smoke concentration collection unit, such as smoke sensors, are not specifically limited and are used to collect smoke concentration information in the workshop.

[0056] Specifically, the first air intake unit and the second air intake unit are, for example, one-way ventilation fans, and are not specifically limited, and only need to be able to input external air into the workshop.

[0057] Specifically, the air outlet module, such as a one-way ventilation fan, is not specifically limited and only needs to be able to transport the gas inside the workshop to the outside of the workshop.

[0058] Specifically, the combination of purification units such as a primary filter, a medium filter and a high efficiency filter is not specifically limited and can be set according to the actual purification requirements of the workshop.

[0059] It can be understood that the first air inlet unit and the second air inlet unit, the air outlet module and the purification unit constitute an air circulation purification channel.

[0060] Specifically, the stepper motor can control the movement of the purification unit through gears and racks. There is no specific limitation, and it only needs to satisfy that the stepper motor can control the movement of the purification unit.

[0061] Specifically, the control module, such as an industrial computer, is not specifically limited and only needs to output corresponding results according to input parameters.

[0062] Specifically, the control module determines the welding fume purification mode based on the filtering evaluation value, wherein:

[0063] The first welding fume purification mode is that the control module only uses the first outlet power to operate the outlet module; the first welding fume purification mode is determined by the filtering evaluation value being less than a preset filtering evaluation value;

[0064] The second welding fume purification mode is that the control module uses the second outlet power to operate the outlet module and uses the first inlet power to operate the first inlet unit or the second inlet unit; the second welding fume purification mode is determined by the filtering evaluation value being greater than or equal to the preset filtering evaluation value; wherein the preset filtering evaluation value is set to 1.22, wherein the first outlet power and the second outlet power are not specifically limited and can be set according to actual conditions, as long as the first outlet power is less than the second outlet power. Similarly, the first inlet power is not limited.

[0065] Specifically, the filtering evaluation value is determined based on the average intensity of welding light and the proportion of welding working time within the first preset time of 60 seconds. The filtering evaluation value is determined by the following formula:

[0066]

[0067] Among them, L is the filtering evaluation value, α is the lighting evaluation coefficient, α is set to 0.44, β is the time proportion evaluation coefficient, β is set to 0.37, P is the average welding light intensity, P0 is the preset welding light average intensity, P0 is set to 10000lm, η is the welding working time proportion, η0 is the preset welding working time proportion, and η0 is set to 12%.

[0068] Specifically, the control module determines the welding fume purification strategy of the purification unit based on the first diffusion characteristic of welding fume in the second welding fume purification mode, wherein:

[0069] If the welding smoke floats up and spreads, the control module controls the purification unit to move to the initial point on the upper part of the slide rail and turns on the second air intake unit;

[0070] If the welding smoke is suspended and diffused, the control module controls the purification unit to move to the initial point in the middle of the slide rail, and turns on the first air intake unit and the second air intake unit;

[0071] If the welding smoke sinks and spreads, the control module controls the purification unit to move to the initial point at the bottom of the slide rail and turns on the first air intake unit;

[0072] Among them, the upper part of the guide rail, the middle part of the guide rail and the lower part of the guide rail have the same length and each initial point position is the midpoint position of the corresponding part.

[0073] Specifically, the first diffusion feature is determined based on the position and spacing of the midpoints of two smoke images collected by the second image acquisition unit at a second preset time interval of 1.5 seconds, wherein:

[0074] If the midpoint of the next frame of smoke image is located above the midpoint of the previous frame of smoke image and the distance between the midpoint of the next frame of smoke image and the midpoint of the previous frame of smoke image is greater than the preset distance 0.20m, it is determined that the first diffusion feature is the upward diffusion of welding smoke;

[0075] If the midpoint of the next frame of smoke image is located below the midpoint of the previous frame of smoke image and the distance between the midpoint of the next frame of smoke image and the midpoint of the previous frame of smoke image is greater than the preset distance, the first diffusion feature is determined to be welding smoke downward diffusion.

[0076] Specifically, the control module determines whether the welding fume purification meets the preset standard according to the second diffusion characteristic under the condition that the welding fume floats and diffuses upward, wherein:

[0077] If the characteristic value of the second diffusion characteristic is less than the first preset characteristic threshold value of 5.7, the control module determines that the welding fume purification does not meet the preset standard, and increases the operating power of the gas outlet module according to the difference between the first preset characteristic threshold value and the characteristic value of the second diffusion characteristic;

[0078] If the characteristic value of the second diffusion characteristic is greater than or equal to the first preset characteristic threshold and less than the second preset characteristic threshold of 10.5, the control module determines that the welding fume purification does not meet the preset standard, and adjusts the position of the purification unit on the slide rail to a corresponding value according to the difference between the characteristic value of the second diffusion characteristic and the first preset characteristic threshold;

[0079] If the characteristic value of the second diffusion characteristic is greater than or equal to the second preset characteristic threshold, the control module determines that the welding fume purification meets the preset standard and continues to purify the welding fume;

[0080] Among them, the characteristic value of the second diffusion feature is the ratio of the lateral diffusion rate of welding smoke to the upward diffusion rate, wherein the lateral diffusion rate is determined by the first image acquisition unit, and the upward diffusion rate is determined by the second image acquisition unit, the lateral diffusion rate is the lateral diffusion rate of the smoke boundary, and the upward diffusion rate is the vertical expansion rate of the upper boundary of the smoke.

[0081] Specifically, the increase in the operating power of the air outlet module is positively correlated with the characteristic difference, where the characteristic difference is the difference between the first preset characteristic threshold and the characteristic value of the second diffusion characteristic. It can be understood that the larger the characteristic difference, the greater the increase in the operating power of the air outlet module.

[0082] Specifically, the control module is provided with a smoke warning threshold and determines that the operation of the filtration system does not meet the preset standard according to the number of warnings within the preset time, and modifies the preset filtration evaluation value, wherein the smoke warning threshold is not specifically limited, for example, 1.2 mg / m 3 .

[0083] Specifically, the control module responds by recording a warning when the smoke concentration is greater than the smoke warning threshold, wherein the smoke concentration is determined jointly by the first smoke concentration collection unit and the second smoke concentration collection unit, such as the average or maximum value collected by the first smoke concentration collection unit and the second smoke concentration collection unit, without specific limitation.

[0084] Specifically, the correction amplitude of the preset filtering evaluation value is positively correlated with the frequency difference, wherein the frequency difference is the difference between the number of warnings within a preset time period and the warning frequency threshold. It can be understood that the larger the frequency difference, the larger the correction amplitude of the preset filtering evaluation value.

[0085] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A carbon neutral air filtration system based on air purification, characterized in that: include: workshop; An information acquisition module, for collecting welding smoke information inside the workshop, comprising a first light intensity acquisition unit and a second light intensity acquisition unit respectively arranged on the top and side walls of the workshop for collecting welding light intensity, a first image acquisition unit arranged adjacent to the first light intensity acquisition unit for collecting smoke image information and a first smoke concentration acquisition unit for collecting smoke concentration information, and a second image acquisition unit arranged adjacent to the second light intensity acquisition unit for collecting smoke image information and a second smoke concentration acquisition unit for collecting smoke concentration information; An air intake module, used for intake of air into the workshop, comprising a first air intake unit and a second air intake unit respectively arranged at the top and the bottom of one side wall of the workshop; An air outlet module is disposed at the middle of the side wall opposite to the air inlet module; A filter module, which is arranged at the input end of the air outlet module, comprises a purification unit for filtering welding fumes inside the workshop, an elastic pipe connecting the purification unit and the air outlet module, and a moving unit for controlling the vertical movement of the purification unit along the side wall of the workshop, wherein the moving unit comprises a slide rail vertically arranged on the side wall, a sliding block connected to the purification unit, and a stepping motor for controlling the movement of the sliding block on the slide rail; a control module, which is respectively connected to the information acquisition module, the air intake module, the air outlet module and the filter module, and is used to determine a welding fume purification mode according to a filtering evaluation value, to determine a welding fume purification strategy of the purification unit according to a first diffusion characteristic of welding fume, and to determine whether welding fume purification meets a preset standard according to a second diffusion characteristic; The control module determines the welding fume purification mode based on the filtering evaluation value, wherein: The first welding fume purification mode is that the control module only uses the first outlet power to operate the outlet module; the first welding fume purification mode is determined by the filtering evaluation value being less than a preset filtering evaluation value; The second welding fume purification mode is that the control module uses the second air outlet power to operate the air outlet module and uses the first air inlet power to operate the first air inlet unit or the second air inlet unit; the second welding fume purification mode is determined by the filtering evaluation value being greater than or equal to the preset filtering evaluation value; The filtering evaluation value is determined based on the average intensity of welding light and the proportion of welding working time within the first preset time of 60 seconds. The filtering evaluation value is determined by the following formula: Wherein, L is the filtering evaluation value, α is the illumination evaluation coefficient, set α=0.44, β is the duration ratio evaluation coefficient, set β=0.37, P is the average intensity of welding illumination, P0 is the preset average intensity of welding illumination, set P0=10000lm, η is the welding working duration ratio, η0 is the preset welding working duration ratio, set η0=12%; The control module determines a welding fume purification strategy of the purification unit based on a first diffusion characteristic of welding fume in a second welding fume purification mode, wherein: If the welding smoke floats up and spreads, the control module controls the purification unit to move to the initial point on the upper part of the slide rail and turns on the second air intake unit; If the welding smoke is suspended and diffused, the control module controls the purification unit to move to the initial point in the middle of the slide rail, and turns on the first air intake unit and the second air intake unit; If the welding smoke sinks and spreads, the control module controls the purification unit to move to the initial point at the bottom of the slide rail and turns on the first air intake unit; The upper part, the middle part and the lower part of the guide rail have the same length and each initial point is the midpoint of the corresponding part; The first diffusion feature is determined based on the position and distance of the midpoints of two smoke images collected by the second image acquisition unit at a second preset time interval of 1.5 seconds, wherein: If the midpoint of the next frame of smoke image is located above the midpoint of the previous frame of smoke image and the distance between the midpoint of the next frame of smoke image and the midpoint of the previous frame of smoke image is greater than the preset distance, it is determined that the first diffusion feature is the upward diffusion of welding smoke; If the midpoint of the next frame of smoke image is located below the midpoint of the previous frame of smoke image and the distance between the midpoint of the next frame of smoke image and the midpoint of the previous frame of smoke image is greater than the preset distance, it is determined that the first diffusion feature is welding fume downward diffusion; The control module determines whether the welding fume purification meets the preset standard according to the second diffusion characteristic under the condition that the welding fume floats and diffuses upward, wherein: If the characteristic value of the second diffusion characteristic is less than the first preset characteristic threshold, the control module determines that the welding fume purification does not meet the preset standard, and increases the operating power of the gas outlet module according to the difference between the first preset characteristic threshold and the characteristic value of the second diffusion characteristic; If the characteristic value of the second diffusion characteristic is greater than or equal to the first preset characteristic threshold and less than the second preset characteristic threshold, the control module determines that the welding fume purification does not meet the preset standard, and adjusts the position of the purification unit on the slide rail to a corresponding value according to the difference between the characteristic value of the second diffusion characteristic and the first preset characteristic threshold; If the characteristic value of the second diffusion characteristic is greater than or equal to the second preset characteristic threshold, the control module determines that the welding fume purification meets the preset standard and continues to purify the welding fume; The characteristic value of the second diffusion characteristic is the ratio of the lateral diffusion rate of welding smoke to the upward diffusion rate.

2. The carbon neutral air filtration system based on air purification according to claim 1, characterized in that: The increase amplitude of the operating power of the outlet module is positively correlated with the characteristic difference, wherein the characteristic difference is the difference between the first preset characteristic threshold and the characteristic value of the second diffusion characteristic.

3. The carbon neutral air filtration system based on air purification according to claim 2, characterized in that: The control module is provided with a smoke warning threshold and corrects the preset filtering evaluation value when it is determined that the operation of the filtering system does not meet the preset standard according to the number of warnings within the preset time.

4. The carbon neutral air filtration system based on air purification according to claim 3 is characterized in that: The control module records a warning in response to smoke concentration being greater than the smoke warning threshold, wherein the smoke concentration is determined jointly by the first smoke concentration collection unit and the second smoke concentration collection unit.

5. The carbon neutral air filtration system based on air purification according to claim 4, characterized in that: The correction range of the preset filtering evaluation value is positively correlated with the frequency difference, wherein the frequency difference is the difference between the number of warnings within a preset time period and the warning frequency threshold.

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