Method for automatically filtering and purifying air in operating room

Abstract

The invention relates to the technical field of medical environment control, in particular to an operating room air automatic filtering and purifying method which comprises the steps that first environment quality data in an operating room are collected in real time through a distributed sensor network, and a first pollution load parameter is determined according to the first environment quality data; determining a strategy adjustment parameter according to the first pollution load parameter and an operating room use frequency coefficient; determining a filtering and purifying strategy according to the strategy adjustment parameter; determining a filtering effect parameter according to the first environment quality data before filtering and purifying and the first environment quality data during filtering and purifying and the operating room use frequency coefficient; the filtering and purifying strategy is determined to be adjusted according to the filtering effect parameters, or the purifying parameters are adjusted, and the problem that in the filtering and purifying process, the filtering and purifying parameters cannot be flexibly adjusted according to the actual concentration of environmental pollution is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical environment control, and particularly to an automatic air filtration and purification method for operating rooms. Background Art

[0002] In the modern medical system, as a key place for performing surgical operations, carrying out first aid and other core medical activities, the air quality in the operating room plays a decisive role in the success of the operation and the postoperative recovery of patients. Dust particles in the air may carry pathogens such as bacteria and viruses, which are extremely likely to cause infections after directly contacting the surgical wound; while microorganisms such as Staphylococcus aureus and Escherichia coli, once spread in the operating room and attached to surgical instruments and patients' wounds, will greatly increase the risk of postoperative infections; harmful gases such as anesthetic waste gas and formaldehyde will not only endanger the physical health of medical staff, but long-term residues may also affect the performance of surgical equipment. Therefore, strictly controlling the air quality in the operating room to ensure that it meets the standards of being sterile, dust-free and harmless is an important prerequisite for ensuring medical safety.

[0003] Currently, the traditional operating room air purification systems adopted by most hospitals mainly rely on fixed operation modes. In terms of ventilation and air change, it usually operates at a constant air change rate. For example, in some operating rooms, regardless of the actual number of personnel and surgical operation conditions, the air change frequency is always maintained at 15 - 20 times per hour. This fixed ventilation strategy cannot adapt to the dynamic changes in the amount of pollutants generated in the operating room. During high-difficulty and long-duration surgeries, a large number of personnel activities and complex operations lead to rapid generation of pollutants, and the constant air change rate is difficult to quickly reduce the pollutant concentration; while during the idle period of the operating room, excessive ventilation causes waste of energy.

[0004] In the use of filters, the traditional system replaces filters according to a fixed cycle, such as replacing the high-efficiency filter every 3 - 6 months. However, in actual use, the pollution levels of different operating rooms vary significantly. In some operating rooms with frequent use and serious pollution, the filter may lose its filtering efficiency before reaching the replacement cycle and cannot effectively intercept dust particles and microorganisms; while for operating rooms with low usage frequency, replacing the filter in advance causes waste of resources.

[0005] In addition, the traditional disinfection methods mostly turn on ultraviolet lamps or ozone generators regularly, lacking the analysis of real-time air quality data and being unable to flexibly adjust the disinfection intensity and time according to the actual concentration of pollutants, resulting in poor disinfection effects or over-disinfection, which not only affects the service life of operating room equipment but may also cause secondary pollution. Summary of the Invention

[0006] Therefore, the present invention provides an automatic air filtration and purification method for operating rooms to overcome the problem in the prior art that the filtration and purification parameters cannot be flexibly adjusted according to the actual concentration of environmental pollution.

[0007] To achieve the above object, the present invention provides an automatic filtering and purification method for the air in the operating room, including: Collecting the first environmental quality data in the operating room in real time through a distributed sensor network, and determining the first pollution load parameter according to the first environmental quality data; Determining a strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient; Determining a filtering and purification strategy according to the strategy adjustment parameter; Determining a filtering effect parameter according to the first environmental quality data before and during filtering and purification, and the operating room usage frequency coefficient; Determining to adjust the filtering and purification strategy or adjust the purification parameters according to the filtering effect parameter; Obtaining the second environmental quality data at the air inlets of each fresh air system, and determining the second pollution load parameter of each second environmental quality data; Adjusting the air direction of each fresh air system according to each second pollution load parameter.

[0008] Further, the process of determining the first pollution load parameter according to the first environmental quality data includes: Calculating the ratio of each first parameter detection value in the first environmental quality data to the corresponding standard detection value to obtain the parameter deviation rate of the first parameter detection value; Determining the weighted sum result of each parameter deviation rate as the first pollution load parameter.

[0009] Further, the process of determining the strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient includes: Determining the operating room usage frequency coefficient according to the number of operating tables in the operating room per day; Determining the weighted sum result of the operating room usage frequency coefficient and the first pollution load parameter as the strategy adjustment parameter.

[0010] Further, determining the operating room usage frequency coefficient according to the number of operating tables in the operating room per day includes: If the number of operating tables is less than or equal to the first standard number of operating tables, determining that the value of the operating room usage frequency coefficient is equal to 1; If the number of operating tables is greater than the first standard number of operating tables and less than or equal to the second standard number of operating tables, determining that the value of the operating room usage frequency coefficient is equal to 2; Otherwise, determining that the value of the operating room usage frequency coefficient is equal to 3; The first standard number of operating tables is less than the second standard number of operating tables.

[0011] Further, according to the strategy adjustment parameters, the determined filtration and purification strategies include a first filtration and purification strategy, a second filtration and purification strategy, and a third filtration and purification strategy; The first filtration and purification strategy is to only operate the primary filter, and its operating power is set to 30% of the rated power. The ultraviolet light is irradiated regularly for 30 minutes after each surgery day, and the air change rate of the fresh air system is maintained at 12 times per hour; The second filtration and purification strategy is to add the operation of the intermediate filter on the basis of operating the primary filter. The operating power of the primary filter is increased to 50% of the rated power, and the operating power of the intermediate filter is set to 40% of the rated power. Ozone disinfection is turned on, and the ozone concentration is maintained at 0.05 mg / m³, and the disinfection time is 20 minutes. The air change rate of the fresh air system is increased to 22 times per hour; The third filtration and purification strategy is to operate the high-efficiency filtration equipment. The operating power of the high-efficiency filter is set to 80% of the rated power, the ozone disinfection concentration is increased to 0.1 mg / m³, and the disinfection time is extended to 30 minutes. At the same time, hydrogen peroxide atomization disinfection is added, the atomization particle size is 5 μm, and the atomization time is 15 minutes. The air change rate of the fresh air system is maximally set to 25 times per hour.

[0012] Further, according to the strategy adjustment parameters, the determined filtration and purification strategies include: If the strategy adjustment parameter is less than or equal to the first standard strategy adjustment parameter, then it is determined to enable the first filtration and purification strategy; If the strategy adjustment parameter is greater than the first standard strategy adjustment parameter and less than or equal to the second standard strategy adjustment parameter, then it is determined to enable the second filtration and purification strategy; Otherwise, it is determined to enable the third filtration and purification strategy; The first standard strategy adjustment parameter is less than the second standard strategy adjustment parameter.

[0013] Further, the process of determining the filtration effect parameter includes: According to the detection values of each first parameter in the first environmental quality data before and after purification filtration, determine the removal rate of the detection value of the first parameter; Calculate the cumulative sum value of the removal rates of the detection values of each first parameter; The weighted sum result of the cumulative sum value and the operating frequency coefficient of the operating room is determined as the filtration effect parameter.

[0014] Further, according to the filtration effect parameter, determining to adjust the filtration and purification strategy or adjust the purification parameters includes: If the filtering effect parameter is smaller than the first standard filtering effect parameter, and the strategy adjustment parameter is smaller than the second strategy adjustment parameter, it is determined to adjust the filtering and purification strategy; Otherwise, it is determined to adjust the filtration purification parameters.

[0015] Further, determining the second pollution load parameter of each of the second environmental quality data includes: Calculate the ratio of each second parameter detection value to the standard value in the second environmental quality data, and determine the parameter deviation rate of each second parameter detection value; Calculate the ratio of the wind speed at the air outlet to the rated wind speed, and determine the correction factor; Calculating the distance between the air outlet and the operating table, and determining an inverse proportional weight; The weighted sum of the parameter deviation rates of the second parameter detection values ​​and the product of the correction factor and the inverse proportional weight are cumulatively summed to obtain the second pollution load parameter.

[0016] Further, adjusting the wind direction of each of the fresh air systems according to each of the second pollution load parameters includes: If the second pollution load parameter is greater than or equal to the first standard pollution load parameter, and the second pollution load parameter is less than the second standard pollution load parameter, the wind direction angle of the air outlet is adjusted so that the wind direction is reciprocated 15 degrees to 30 degrees toward the center of the operating table, and the wind speed is 60% of the approved rated power; If the second pollution load parameter is greater than or equal to the second standard pollution load parameter, the wind direction angle of the air outlet is adjusted so that the wind direction is fixedly deflected 45 degrees from the center of the operating table and the wind speed reaches 80% of the approved rated power.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the present invention uses a distributed sensor network to achieve comprehensive and real-time collection of environmental quality parameters such as dust particle concentration, microbial content, harmful gas concentration, temperature and humidity in the operating room. Combined with the pollution load assessment model, the weight coefficient is set by comprehensively considering national standards, surgical types and historical data, and the degree of pollution is accurately quantified, providing scientific and reliable data support for purification decisions, changing the problem of incomplete monitoring and inaccurate assessment in traditional methods.

[0018] Furthermore, according to the first pollution load parameter and the frequency of use of the operating room, the strategy adjustment parameter is calculated through a formula, and a corresponding relationship with the filtration and purification strategy library is established to achieve intelligent selection of purification strategies. And in the purification process, according to the comparison between the filtration effect parameter and the preset target range, mathematical expressions and logical expressions are used to dynamically adjust the purification strategy or parameters, so that the purification system can adapt to the complex and changing environment of the operating room to ensure that the air quality always meets the standard.

[0019] Furthermore, break through the limitations of the traditional fixed purification mode and no longer blindly operate the purification equipment with constant parameters. By dynamically adjusting the filtration and purification strategies and parameters, reduce the equipment operation intensity when the operating room is idle or less polluted, and strengthen the purification intensity when the pollution is severe or the usage is frequent, effectively reducing energy consumption and the amount of consumables used, improving the resource utilization efficiency, and significantly reducing the operating costs of the hospital in the air purification of the operating room.

[0020] Furthermore, the continuously optimized filtration and purification strategy can efficiently control the concentration of various pollutants in the operating room, greatly reduce the risk of surgical wound infection, create a safe and reliable air quality environment for the smooth progress of the operation and the postoperative rehabilitation of the patient, and has important clinical significance and social benefits for improving medical quality and ensuring the life and health of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the step flowchart of the automatic air filtration and purification method for the operating room according to the embodiment of the present invention; Figure 2 is the step flowchart of determining the first pollution load parameter according to the first environmental quality data in the embodiment of the present invention; Figure 3 is the step flowchart of determining the strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient in the embodiment of the present invention; Figure 4 is the step flowchart of determining the filtration effect parameter in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the purpose and advantages of the present invention clearer, the present invention will be 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.

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and do not limit the protection scope of the present invention.

[0024] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0025] Please refer to Figure 1 as shown Figure 1This is a flowchart of the steps of the automatic air filtration and purification method for the operating room according to the embodiments of the present invention.

[0026] The automatic air filtration and purification method for the operating room according to the embodiments of the present invention includes: Collecting the first environmental quality data in the operating room in real time through a distributed sensor network, and determining the first pollution load parameter according to the first environmental quality data; Determining the strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient; Determining the filtration and purification strategy according to the strategy adjustment parameter; Determining the filtration effect parameter according to the first environmental quality data before and during filtration and purification, and the operating room usage frequency coefficient; Determining to adjust the filtration and purification strategy or the purification parameter according to the filtration effect parameter; Obtaining the second environmental quality data at the air inlets of each fresh air system, and determining the second pollution load parameter of each second environmental quality data; Adjusting the air direction of each fresh air system according to each second pollution load parameter.

[0027] Please refer to Figure 2 as shown in Figure 2 This is a flowchart of the steps of determining the first pollution load parameter according to the first environmental quality data in the embodiments of the present invention.

[0028] Specifically, the process of determining the first pollution load parameter according to the first environmental quality data includes: Calculating the ratio of each first parameter detection value in the first environmental quality data to the corresponding standard detection value to obtain the parameter deviation rate of the first parameter detection value; Determining the weighted sum result of each parameter deviation rate as the first pollution load parameter.

[0029] Specifically, the first pollution load parameter is calculated by the following formula:

[0030] where is the number of types of the first parameter detection values; is the weight coefficient of the i-th first parameter detection value, ; is the i-th first parameter detection value; is the standard value corresponding to the i-th first parameter detection value.

[0031] Please refer to Figure 3 as shown in Figure 3This is a flowchart of the steps for the embodiment of the present invention to determine the strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient.

[0032] Specifically, determining the strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient includes the following steps: Determine the operating room usage frequency coefficient according to the number of operating tables performed in the operating room daily; Determine the weighted sum result of the operating room usage frequency coefficient and the first pollution load parameter as the strategy adjustment parameter.

[0033] Specifically, the strategy adjustment parameter is calculated by the following formula:

[0034] where, and are weight coefficients, ; is the operating room usage frequency coefficient.

[0035] Specifically, determining the operating room usage frequency coefficient according to the number of operating tables performed in the operating room daily includes: If the number of operating tables is less than or equal to the first standard number of operating tables, determine that the value of the operating room usage frequency coefficient is equal to 1; If the number of operating tables is greater than the first standard number of operating tables and less than or equal to the second standard number of operating tables, determine that the value of the operating room usage frequency coefficient is equal to 2; Otherwise, determine that the value of the operating room usage frequency coefficient is equal to 3; Set the first standard number of operating tables to 1 and the second standard number of operating tables to 5.

[0036] Specifically, the filtration and purification strategy includes a first filtration and purification strategy, a second filtration and purification strategy, and a third filtration and purification strategy; The first filtration and purification strategy is to only operate the primary filter, and its operating power is set to 30% of the rated power. The ultraviolet light is irradiated regularly for 30 minutes after each operation, and the air change rate of the fresh air system is maintained at 12 times per hour; The second filtration and purification strategy is to add the operation of the intermediate filter on the basis of operating the primary filter. The operating power of the primary filter is increased to 50% of the rated power, and the operating power of the intermediate filter is set to 40% of the rated power. Ozone disinfection is turned on, and the ozone concentration is maintained at 0.05 mg / m³, and the disinfection time is 20 minutes. The air change rate of the fresh air system is increased to 22 times per hour; The third filtration and purification strategy is to operate an efficient filtration device. The operating power of the high-efficiency filter is set to 80% of the rated power. The ozone disinfection concentration is increased to 0.1 mg / m³, and the disinfection time is extended to 30 minutes. At the same time, hydrogen peroxide atomization disinfection is added, with the atomization particle size of 5 μm and the atomization time of 15 minutes. The fresh air system air change rate is maximally set to 25 times per hour.

[0037] Specifically, the filtration and purification strategy is determined according to the strategy adjustment parameters, including: If the strategy adjustment parameter is less than or equal to the first standard strategy adjustment parameter, then it is determined to enable the first filtration and purification strategy; If the strategy adjustment parameter is greater than the first standard strategy adjustment parameter and less than or equal to the second standard strategy adjustment parameter, then it is determined to enable the second filtration and purification strategy; Otherwise, it is determined to enable the third filtration and purification strategy; The first standard strategy adjustment parameter is set to 1.5, and the second standard strategy adjustment parameter is set to 3.

[0038] Please refer to Figure 4 as shown Figure 4 which is the step flowchart for determining the filtration effect parameter in the embodiment of the present invention.

[0039] Specifically, the process of determining the filtration effect parameter includes: According to the detection values of each first parameter in the first environmental quality data before and after purification and filtration, determine the removal rate of the first parameter detection value; Calculate the cumulative sum value of the removal rates of each first parameter detection value; The weighted sum result of the cumulative sum value and the operating frequency coefficient of the operating room is determined as the filtration effect parameter.

[0040] Specifically, the removal rate of the first parameter detection value is calculated according to the following formula;

[0041] where, is the detection value of the i-th first parameter before purification, is the detection value of the i-th first parameter after purification; The filtration effect parameter is calculated according to the following formula:

[0042] where, and are the weight coefficients, + = 1.

[0043] Specifically, determining the adjustment of the filtration and purification strategy or the adjustment of the purification parameters according to the filtration effect parameter, including: If the filtration effect parameter is less than the first standard filtration effect parameter and the strategy adjustment parameter is less than the second strategy adjustment parameter, then determine to adjust the filtration and purification strategy; Otherwise, determine to adjust the filtration and purification parameters.

[0044] Specifically, when determining to adjust the filtration and purification strategy, determine the adjustment step size of the strategy adjustment parameter according to the gap between the strategy adjustment parameter and the first standard strategy adjustment parameter.

[0045] Specifically, calculate the adjustment step size of the strategy adjustment parameter through the following formula:

[0046] Where k is the adjustment coefficient, and the value range is 0 - 1.

[0047] Specifically, when determining to adjust the filtration and purification parameters, determine the adjustment step size of the filtration and purification parameters according to the gap between the first standard strategy adjustment parameter and the strategy adjustment parameter.

[0048] Specifically, calculate the adjustment step size through the following:

[0049] Where m is the adjustment coefficient, and the value range is 0 - 1.

[0050] It should be noted that the filtration and purification parameters include but are not limited to various operating parameters mentioned in the filtration and purification strategy, such as rated power, disinfection time, fresh air system air change rate, etc.

[0051] Specifically, determining the second pollution load parameter of each second environmental quality data, including: Calculate the ratio of each second parameter detection value in the second environmental quality data to the standard value, and determine the parameter deviation rate of each second parameter detection value; Calculate the ratio of the outlet air velocity to the rated air velocity, and determine the correction factor; Calculate the distance between the outlet and the operating table, and determine the inverse proportional weight; Accumulate and sum the weighted sum result of the parameter deviation rates of each second parameter detection value and the product of the correction factor and the inverse proportional weight to obtain the second pollution load parameter.

[0052] Specifically, calculate the second pollution load parameter using the following formula:

[0053]

[0054]

[0055]

[0056] wherein, is the i-th second parameter detection value of the fresh air system air inlet; is the standard value of the i-th second parameter detection value; is the parameter deviation rate of the i-th second parameter detection value of the fresh air system air inlet; is the wind speed of the j-th fresh air system air inlet; is the standard wind speed; is the distance weight coefficient of the j-th fresh air system air inlet; is the minimum distance; is the distance between the j-th fresh air system air inlet and the operating table; is the wind speed correction factor of the fresh air system air inlet; is the weight parameter of the second parameter detection value, giving priority to the dust particle weight, and the sum of the coefficients is 1.

[0057] Furthermore, according to each second pollution load parameter, the wind direction of each fresh air system is adjusted, including: If the second pollution load parameter is greater than or equal to the first standard pollution load parameter and less than the second standard pollution load parameter, then adjust the air outlet wind direction angle so that the wind direction reciprocally deflects 15 degrees - 30 degrees towards the center of the operating table, and at the same time the wind speed reaches 60% of the approved rated power; If the second pollution load parameter is greater than or equal to the second standard pollution load parameter, then adjust the air outlet wind direction angle so that the wind direction is fixedly deflected 45 degrees towards the center of the operating table, and at the same time the wind speed reaches 80% of the approved rated power.

[0058] Specifically, the first standard pollution load parameter is 0.8, and the second standard pollution load parameter is 1.2.

[0059] So far, the technical solution of the present invention has 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 all fall within the protection scope of the present invention.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention; for those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic air filtration and purification method for operating rooms, characterized in that, Including: Collecting first environmental quality data in the operating room in real time through a distributed sensor network, and determining a first pollution load parameter according to the first environmental quality data; Determining a strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient; Determining a filtration and purification strategy according to the strategy adjustment parameter; Determining a filtration effect parameter according to the first environmental quality data before and during filtration and purification, and the operating room usage frequency coefficient; Determining to adjust the filtration and purification strategy or adjust the purification parameters according to the filtration effect parameter; Obtaining second environmental quality data at the air inlets of each fresh air system, and determining a second pollution load parameter for each of the second environmental quality data; Determining to adjust the air direction of each fresh air system according to each of the second pollution load parameters.

2. The automatic air filtration and purification method for the operating room according to claim 1, characterized in that Determining the first pollution load parameter according to the first environmental quality data, the process including: Calculating the ratio of each first parameter detection value in the first environmental quality data to the corresponding standard detection value to obtain the parameter deviation rate of the first parameter detection value; Determining the weighted summation result of each of the parameter deviation rates as the first pollution load parameter.

3. The automatic air filtration and purification method for operating rooms according to claim 2, characterized in that, Determining the strategy adjustment parameter according to the first pollution load parameter and the operating room usage frequency coefficient, the process including: Determining the operating room usage frequency coefficient according to the number of operating tables in the operating room per day; Determining the weighted summation result of the operating room usage frequency coefficient and the first pollution load parameter as the strategy adjustment parameter.

4. The method for automatic filtration and purification of the air in the operating room according to claim 3, wherein, Determining the operating room usage frequency coefficient according to the number of operating tables in the operating room per day, including: If the number of operating tables is less than or equal to the first standard number of operating tables, determining that the value of the operating room usage frequency coefficient is equal to 1; If the number of operating tables is greater than the first standard number of operating tables and less than or equal to the second standard number of operating tables, determining that the value of the operating room usage frequency coefficient is equal to 2; Otherwise, determining that the value of the operating room usage frequency coefficient is equal to 3; The first standard number of operating tables is less than the second standard number of operating tables.

5. The automatic air filtration and purification method for operating rooms according to claim 4, characterized in that, Determining the filtration and purification strategy according to the strategy adjustment parameter includes a first filtration and purification strategy, a second filtration and purification strategy, and a third filtration and purification strategy; The first filtration and purification strategy is to only operate the primary filter, its operating power is set to 30% of the rated power, the ultraviolet light is irradiated regularly for 30 minutes after each operation, and the fresh air system air change rate is maintained at 12 times per hour; The second filtration and purification strategy is: on the basis of operating the primary filter, adding the operation of the medium filter, the operating power of the primary filter is increased to 50% of the rated power, the operating power of the medium filter is set to 40% of the rated power, ozone disinfection is turned on, the ozone concentration is maintained at 0.05 mg / m³, the disinfection time is 20 minutes, and the fresh air system air change rate is increased to 22 times per hour; The third filtration and purification strategy is to operate an efficient filtration device. The operating power of the high-efficiency filter is set to 80% of the rated power. The ozone disinfection concentration is increased to 0.1 mg / m³, and the disinfection time is extended to 30 minutes. At the same time, hydrogen peroxide atomization disinfection is added. The atomization particle size is 5 μm, and the atomization time is 15 minutes. The fresh air system air change rate is maximally set to 25 times per hour.

6. The automatic air filtration and purification method for operating rooms according to claim 5, characterized in that, Determine the filtration and purification strategy according to the parameters adjusted by the strategy, including: If the parameter adjusted by the strategy is less than or equal to the first standard strategy adjustment parameter, it is determined to enable the first filtration and purification strategy; If the parameter adjusted by the strategy is greater than the first standard strategy adjustment parameter and less than or equal to the second standard strategy adjustment parameter, it is determined to enable the second filtration and purification strategy; Otherwise, it is determined to enable the third filtration and purification strategy; The first standard strategy adjustment parameter is less than the second standard strategy adjustment parameter.

7. The automated air filtration and purification method for the operating room according to claim 6, characterized in that, Determine the filtration effect parameter, and the process includes: According to the detection values of each first parameter in the first environmental quality data before and after purification and filtration, determine the removal rate of the detection value of the first parameter; Calculate the cumulative sum value of the removal rates of the detection values of each first parameter; Determine the weighted sum result of the cumulative sum value and the operating frequency coefficient of the operating room as the filtration effect parameter.

8. The automatic air filtration and purification method for operating rooms according to claim 7, characterized in that, Determine to adjust the filtration and purification strategy or the purification parameters according to the filtration effect parameter, including: If the filtration effect parameter is less than the first standard filtration effect parameter and the parameter adjusted by the strategy is less than the second strategy adjustment parameter, it is determined to adjust the filtration and purification strategy; Otherwise, it is determined to adjust the filtration and purification parameters.

9. The automatic air filtering and purification method for operating rooms according to claim 8, characterized in that Determine the second pollution load parameter of each second environmental quality data, including: Calculate the ratio of the detection value of each second parameter in the second environmental quality data to the standard value, and determine the parameter deviation rate of the detection value of each second parameter; Calculate the ratio of the outlet air velocity to the rated air velocity to determine the correction factor; Calculate the distance between the outlet and the operating table to determine the inverse proportion weight; Accumulatively sum the weighted sum result of the parameter deviation rates of the detection values of each second parameter and the product of the correction factor and the inverse proportion weight to obtain the second pollution load parameter.

10. The automated air filtration and purification method for operating rooms according to claim 9, characterized in that, Determine to adjust the air direction of each fresh air system according to each second pollution load parameter, including: If the second pollution load parameter is greater than or equal to the first standard pollution load parameter and less than the second standard pollution load parameter, adjust the air outlet direction angle so that the air direction reciprocally deflects 15 degrees - 30 degrees towards the center of the operating table, and at the same time, the air velocity is adjusted to 60% of the rated power; If the second pollution load parameter is greater than or equal to the second standard pollution load parameter, adjust the air outlet direction angle so that the air direction is fixedly deflected 45 degrees towards the center of the operating table, and at the same time, the air velocity is adjusted to 80% of the rated power.

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