An air supply system for regulating the environment of a venue floor

Abstract

The present application relates to HVAC system control technology field, especially to a kind of for the floor environment regulation and control of stadium, including: with to closed type processing hall air inside circulation air supply module;With to utilize outdoor fresh air to the air exchange of stadium interior air is outside circulation air exchange module;Data acquisition module;With to determine the air supply strategy of stadium according to the trajectory turning angle density in first preset time period Strategy determination module;With to determine whether the air supply meets preset standard according to the temperature fluctuation characteristic value of motion trajectory dense area, with to determine the reason that air supply does not meet preset standard according to the carbon dioxide concentration of motion trajectory dense area Control module.The present application improves environmental regulation and control efficiency.

Description

Technical Field

[0001] This invention relates to the field of HVAC system control technology, and more particularly to an air supply system for regulating the floor environment of a venue. Background Technology

[0002] Underfloor air supply systems are a type of HVAC system that utilizes the space between the structural floor slab and the raised floor as a plenum. Processed air is delivered from the ground at a certain speed, flowing upwards to the core areas of human activity (typically 0-1.8 meters above ground). After absorbing heat emitted by people and equipment, the air rises naturally and is eventually drawn back out through the top return air vents, forming a complete airflow circulation pattern—a "bottom supply, top return" airflow cycle. Compared to traditional overhead air supply systems, underfloor air supply systems offer advantages in thermal comfort, energy efficiency, spatial flexibility, and indoor air quality.

[0003] However, existing floor ventilation systems mostly adopt a fixed air supply strategy and fail to dynamically adjust according to changes in the activity status of people in the venue. On the other hand, venue environmental control usually needs to strike a balance between energy-saving internal circulation (handling return air) and external circulation (introducing fresh air) to ensure air quality, but existing systems have difficulty coordinating internal and external circulation modes.

[0004] Chinese Patent Application Publication No. CN106885354A discloses a thermal and humidity environment control system and method for curling venues. The system includes a bottom-mounted air supply device in the competition area and a top-mounted air return device in the spectator area. The bottom-mounted air supply device includes overhead cavities arranged on both sides of the competition area, air supply ducts within the overhead cavities, and displacement air outlets on the overhead cavities. This invention utilizes air supply ducts located at the bottom of the competition area to deliver low-temperature, dry air, and then distributes this air into the competition area through displacement air outlets, thereby controlling the humidity in the competition area and maintaining a slightly positive pressure state to prevent heat and humidity generation in the spectator area from interfering with the competition area. Simultaneously, the top-mounted air return device in the spectator area returns the heat and humidity generated indoors, uniformly expelling it to meet the different thermal and humidity environment parameter control requirements of the spectator area and the competition area, thus achieving effective regulation of the thermal and humidity environment of the curling venue.

[0005] It can be seen that the air supply strategy in the above technical solution is based on the preset regional functions and does not take into account the impact of the movement trajectory and activity density of people in the venue on the air supply strategy, resulting in poor adaptability of the air supply strategy; in addition, the lack of an independent external circulation ventilation module makes it difficult to effectively refresh the indoor air, thus resulting in low environmental control efficiency. Summary of the Invention

[0006] To address this, the present invention provides an air supply system for environmental control of stadium floors, which overcomes the problems of poor adaptability of air supply strategies caused by the failure to consider the movement trajectory and activity density of people in the stadium in the prior art; in addition, the lack of an independent external circulation ventilation module makes it difficult to effectively refresh indoor air, resulting in low environmental control efficiency.

[0007] To achieve the above objectives, the present invention provides an air supply system for controlling the floor environment of a venue, comprising:

[0008] The internal circulation air supply module is used for closed-loop air treatment in the building.

[0009] The external circulation ventilation module is used to exchange the air inside the venue with fresh outdoor air;

[0010] The data acquisition module includes a graphic acquisition unit set in the center of the ceiling of the venue to acquire the movement trajectory of people inside the venue, a temperature acquisition unit set in the side wall of the venue to acquire the temperature inside the venue, and a carbon dioxide concentration acquisition unit set in the side wall of the venue to acquire the carbon dioxide concentration inside the venue.

[0011] The strategy determination module, which is connected to the data acquisition module, is used to determine the venue's air supply strategy based on the trajectory turning angle density within a first preset time period.

[0012] The control module, which is connected to the external circulation ventilation module, the data acquisition module and the strategy determination module respectively, is used to determine whether the air supply meets the preset standard based on the temperature fluctuation characterization value of the dense motion trajectory area, and to determine the reason why the air supply does not meet the preset standard based on the carbon dioxide concentration of the dense motion trajectory area.

[0013] Furthermore, the strategy determination module determines the venue's air supply strategy based on the trajectory turning angle density within a first preset time period, wherein,

[0014] If the trajectory turning angle density is less than the first preset trajectory turning angle density, then the internal circulation air supply module is determined to supply air at the first preset air supply rate and the external circulation ventilation module is determined to intermittently supply air at the second preset air supply rate according to the preset cycle.

[0015] If the trajectory turning angle density is greater than or equal to the first preset trajectory turning angle density and less than the second preset trajectory turning angle density, then it is determined that the external circulation ventilation module intermittently turns on the air supply at the second preset air supply rate according to the preset cycle, and the internal circulation air supply module supplies air at the third preset air supply rate.

[0016] If the trajectory turning angle density is greater than or equal to the second preset trajectory turning angle density, then it is determined that the internal circulation air supply module supplies air at the fourth preset air supply rate and the external circulation ventilation module supplies air at the fifth preset air supply rate.

[0017] Among them, the fourth preset air supply rate is greater than the first preset air supply rate, the first preset air supply rate is greater than the third preset air supply rate, the fifth preset air supply rate is less than the fourth preset air supply rate, the fifth preset air supply rate is greater than the first preset air supply rate, and the second preset air supply rate is less than the third preset air supply rate.

[0018] Furthermore, the trajectory turning angle density within the first preset time period is the ratio of the total number of acute-angle turns of all personnel in the venue within the first preset time period to the total length of the movement trajectory lines of all personnel in the venue within the first preset time period.

[0019] Furthermore, the control module determines whether the air supply meets the preset standard based on the temperature fluctuation characteristics of the densely populated movement trajectory area within the second preset time period, wherein...

[0020] If the temperature fluctuation characterization value is less than the first preset temperature fluctuation characterization value, then the air supply is determined to meet the preset standard.

[0021] If the temperature fluctuation characterization value is greater than or equal to the first preset temperature fluctuation characterization value and less than the second preset temperature fluctuation characterization value, it is determined that the air supply meets the preset standard, and the air supply meets the preset standard again based on the trajectory turning angle density change rate of the dense motion trajectory area.

[0022] If the temperature fluctuation characterization value is greater than or equal to the second preset temperature fluctuation characterization value, it is determined that the air supply does not meet the preset standard, and the reason for the air supply not meeting the preset standard is determined based on the carbon dioxide concentration in the dense motion trajectory area.

[0023] Furthermore, the dense area of ​​movement trajectories is a connected area formed by adjacent high-density floor areas covering several trajectory strip areas. The trajectory strip area is a strip-shaped area with the movement trajectory line of the people in the venue as the center line and extending to both sides by a predetermined width. The high-density floor area is a floor area with a density value greater than or equal to a predetermined density value.

[0024] Furthermore, the temperature fluctuation characterization value is the ratio of the time during which the difference between the temperature at a preset height of the venue and the initial temperature at the preset height when the external circulation ventilation module starts is greater than the preset difference to the preset ventilation duration of the external circulation ventilation module.

[0025] Furthermore, the control module makes a secondary determination of whether the air supply meets the preset standard based on the rate of change of trajectory turning angle density in the dense area of ​​the motion trajectory, wherein,

[0026] If the rate of change of trajectory turning angle density is less than the preset rate of change of trajectory turning angle density, the air supply is determined to meet the preset standard.

[0027] If the trajectory turning angle density change rate is greater than or equal to the preset trajectory turning angle density change rate, it is determined that the air supply does not meet the preset standard, and the preset cycle is reduced according to the difference between the preset trajectory turning angle density change rate and the trajectory turning angle density change rate.

[0028] The rate of change of trajectory turning angle density is determined by the initial trajectory turning angle density and the final trajectory turning angle density of the dense area of ​​motion trajectory within the second preset time period.

[0029] Furthermore, the control module has several cycle adjustment methods for reducing the preset cycle, wherein,

[0030] If the difference in trajectory steering angle density is less than the first preset difference, then the preset period is reduced to the corresponding value using the first adjustment coefficient;

[0031] If the difference in trajectory steering angle density is greater than or equal to the first preset difference and less than the second preset difference, then the preset period is reduced to the corresponding value using the second adjustment coefficient.

[0032] If the difference in trajectory steering angle density is greater than or equal to the second preset difference, then the preset period is reduced to the corresponding value using the third adjustment coefficient;

[0033] The difference in trajectory steering angle density is the difference between the preset trajectory steering angle density change rate and the trajectory steering angle density change rate.

[0034] Furthermore, the control module determines the reason why the air supply does not meet the preset standard based on the carbon dioxide concentration in the dense motion trajectory area, wherein...

[0035] If the carbon dioxide concentration is less than the preset carbon dioxide concentration, the cause is determined to be uneven airflow distribution in the dense motion trajectory area;

[0036] If the carbon dioxide concentration is greater than or equal to the preset carbon dioxide concentration, the cause is determined to be insufficient air supply rate of the external circulation ventilation module. The preset air supply time of the external circulation ventilation module is increased according to the difference between the carbon dioxide concentration and the preset carbon dioxide concentration.

[0037] The carbon dioxide concentration in the densely populated area of ​​the motion trajectory is obtained through the data acquisition module.

[0038] Furthermore, the increase in the preset gas delivery time is positively correlated with the difference between the carbon dioxide concentration and the preset carbon dioxide concentration.

[0039] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention quantifies the intensity of personnel activity by using trajectory turning angle density, dynamically generates a graded air supply strategy, and reduces energy consumption when personnel activity is low, with the internal circulation operating at a low rate and the external circulation intermittently activated according to a preset cycle; when personnel activity is intense, the high-speed operation mode of both internal and external circulation is activated; simultaneously, energy consumption is reduced by graded adjustment of the preset cycle and positive correlation adjustment between the external circulation air supply rate and the difference in carbon dioxide concentration; the stability of airflow distribution is assessed by temperature fluctuation characterization values, and when the judgment result is within a certain range, a secondary judgment is made by introducing the trajectory turning angle density change rate to ensure the accuracy of the judgment result; when the air supply does not meet the preset standard, the cause is quickly located based on the carbon dioxide concentration in the dense area of ​​the movement trajectory, forming a precise problem diagnosis and handling mechanism. The clear division of labor and coordinated cooperation between the internal and external circulation maintains the stability of the indoor air temperature through internal circulation and ensures the freshness of the air through external circulation, thereby improving the environmental control efficiency of the air supply system.

[0040] Furthermore, this invention formulates an adaptive air supply strategy based on the trajectory turning angle density. When there is little human activity, the internal circulation supplies air at a low rate, while the external circulation is intermittently activated to save energy. When human activity is moderate, the internal circulation air supply rate is adjusted, while the external circulation remains intermittently activated. When human activity is intense, both the internal and external circulation operate at higher rates to meet environmental control requirements. This hierarchical control strategy can adapt to different human activity states, thereby improving energy efficiency while ensuring environmental comfort.

[0041] Furthermore, this invention quantifies the complexity and activity level of personnel movement within the venue by defining a calculation method for the trajectory turning angle density within a first preset time period, namely the ratio of the total number of acute angle turns to the total length of the movement trajectory line, thereby improving the intelligence level of the air supply system.

[0042] Furthermore, this invention determines whether the air supply meets the preset standard by using the temperature fluctuation characterization value of the dense movement trajectory area. When the judgment result is within the range, a secondary judgment is made by combining the trajectory turning angle density change rate. If the temperature characterization value determines that the standard is not met, the reason for the non-compliance is determined by the carbon dioxide concentration. This judgment mechanism focuses on the key areas where people's activities are concentrated in the venue. The dense movement trajectory area is the core area where people stay the longest and have the most frequent activities. The temperature and air quality in this area directly affect people's experience. If the average environmental data of the entire venue is used as the judgment standard, it may mask the local anomalies in the core area, resulting in the environmental quality of the key area not being guaranteed. At the same time, through multi-dimensional judgment and cause analysis, the accuracy of the air supply effect judgment is improved.

[0043] Furthermore, this invention employs a secondary determination method based on the rate of change of trajectory turning angle density in dense motion trajectory areas, along with corresponding processing measures. When the rate of change of trajectory turning angle density is small, reducing the preset external circulation cycle better adapts to changes in personnel activity, avoids unnecessary energy consumption, and thus improves the adaptive capability of the air supply system. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the module connection of the air supply system for venue floor environmental control according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the air supply system for controlling the floor environment of a venue, according to an embodiment of the present invention.

[0046] Figure 3 A flowchart illustrating the air supply strategy for a venue in an embodiment of the present invention;

[0047] Figure 4 This is a flowchart illustrating how the air supply meets a preset standard based on the temperature fluctuation characteristics of a densely populated area of ​​motion trajectory, as described in an embodiment of the present invention.

[0048] In the diagram, 101 is the floor plenum chamber; 102 is the air supply outlet; 103 is the return air outlet; 104 is the first air supply duct; 105 is the second air supply duct; 106 is the air conditioner; 107 is the manifold; 201 is the side wall air supply outlet; 202 is the third air supply duct; 203 is the first variable frequency fan; 204 is the fourth air supply duct; 205 is the second variable frequency fan; 206 is the fifth air supply duct; and 207 is the sixth air supply duct. Detailed Implementation

[0049] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0050] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0051] It should be noted that the data in this embodiment are all derived from a comprehensive analysis and evaluation of historical test data and corresponding historical test results from the three months prior to this test. Those skilled in the art will understand that the determination method for any of the above parameters can be based on selecting the value with the highest percentage from the data distribution as the preset standard parameter, using weighted summation to obtain the value as the preset standard parameter, substituting each historical data point into a specific formula and using the value obtained from that formula as the preset standard parameter, or other selection methods, as long as the present invention can clearly define different specific situations in the single-item judgment process through the obtained values.

[0052] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The figures shown are: a schematic diagram of the module connection of the air supply system for venue floor environment control according to an embodiment of the present invention; a schematic diagram of the structure of the air supply system for venue floor environment control according to an embodiment of the present invention; a flowchart of determining the air supply strategy of the venue according to an embodiment of the present invention; and a flowchart of determining whether the air supply meets the preset standard based on the temperature fluctuation characterization value of the dense movement trajectory area according to an embodiment of the present invention.

[0053] This invention provides an air supply system for controlling the floor environment of a sports venue, comprising:

[0054] An internal circulation air supply module, used for closed-loop air treatment within the venue, includes a floor plenum 101, several air supply outlets 102, several return air outlets 103, a first air supply duct 104, a second air supply duct 105, an air conditioner 106, and a manifold 107. The floor plenum 101 is located beneath the venue floor, the air supply outlets 102 are evenly distributed on the surface of the venue floor above the floor plenum 101, and the return air outlets 103 are evenly distributed in the ceiling of the venue. The inlet of the air duct 104 is connected to the manifold 107, the outlet of the first air supply duct 104 is connected to the inlet of the air conditioner 106, the outlet of the second air supply duct 105 is connected to the floor plenum 101, and the inlet of the second air supply duct 105 is connected to the outlet of the air conditioner 106. The manifold 107 is installed inside the ceiling of the venue and is used to integrate the airflow of all return air vents 103 through several branch pipes.

[0055] An external circulation ventilation module, used to ventilate the interior of the venue using fresh outdoor air, includes several side wall air outlets 201, a third air supply duct 202, a first variable frequency fan 203, a fourth air supply duct 204, a second variable frequency fan 205, a fifth air supply duct 206, and a sixth air supply duct 207. The side wall air outlets 201 are located on the lower part of the side walls of the venue. The output end of the third air supply duct 202 is connected to the side wall air outlets 201, and the input end of the third air supply duct 202 is connected to the first variable frequency fan. The output end of the fourth air supply duct 204 is connected to the outside, the output end of the fourth air supply duct 204 is connected to the input end of the first variable frequency fan 203, the input end of the fifth air supply duct 206 is connected to the manifold 107, the output end of the fifth air supply duct 206 is connected to the input end of the second variable frequency fan 205, the input end of the sixth air supply duct 207 is connected to the output end of the second variable frequency fan 205, and the output end of the sixth air supply duct 207 is connected to the outside.

[0056] The data acquisition module includes a graphic acquisition unit set in the center of the venue ceiling to acquire the movement trajectory of people inside the venue, a temperature acquisition unit set in the side wall of the venue to acquire the temperature inside the venue, and a carbon dioxide concentration acquisition unit set in the side wall of the venue to acquire the carbon dioxide concentration inside the venue.

[0057] The strategy determination module, which is connected to the data acquisition module, is used to determine the venue's air supply strategy based on the trajectory turning angle density within a first preset time period.

[0058] The control module is connected to the external circulation ventilation module, the data acquisition module, and the strategy determination module, respectively, and is used to determine whether the air supply meets the preset standard based on the temperature fluctuation characterization value of the dense motion trajectory area.

[0059] In this embodiment, the image acquisition unit is an industrial-grade camera array, uniformly distributed in a regular dodecagon, covering a radius of 20m; the temperature acquisition unit is a temperature sensor, with 16 temperature sensors evenly arranged on the side wall of the venue at a height of 1.5m above the ground; the carbon dioxide concentration acquisition unit is an infrared carbon dioxide gas sensor, which is installed on the side wall at a height of 1.2m above the ground.

[0060] It should be noted that the data in this embodiment are all results obtained through preliminary experiments before this test using the method described in this invention. Each preset value can be adjusted according to the specific application, as long as the method described in this invention can clearly define different specific situations in the single-item judgment process through the acquired values. The preset values ​​set in this embodiment are all obtained from preliminary experiments, including the correction coefficients, which were also selected through experimental verification.

[0061] Specifically, there are no restrictions on the specific structure of the strategy determination module and the control module. They themselves and their units can be composed of logic components, including field-programmable components, computers, or microprocessors in computers.

[0062] Specifically, the strategy determination module determines the venue's air supply strategy based on the trajectory turning angle density within a first preset time period, wherein...

[0063] If the trajectory turning angle density is less than the first preset trajectory turning angle density of 0.4 times / m, then the internal circulation air supply module is determined to supply air at the first preset air supply rate of 1.2m. 3 / s air supply and the external circulation ventilation module intermittently turns on to supply air at a second preset air supply rate according to a preset cycle;

[0064] If the trajectory turning angle density is greater than or equal to the first preset trajectory turning angle density and less than the second preset trajectory turning angle density of 0.8 times / m, then the external circulation ventilation module is determined to operate at a second preset air supply rate of 0.7m / m according to a preset cycle. 3 The internal circulation air supply module intermittently activates air supply at a third preset air supply rate of 0.9m / s. 3 / s air supply;

[0065] If the trajectory turning angle density is greater than or equal to the second preset trajectory turning angle density, then the internal circulation air supply module is determined to supply air at a fourth preset air supply rate of 1.6m. 3 / s air supply and the external circulation ventilation module supplies air at a fifth preset air supply rate of 1.5m. 3 / s air supply;

[0066] Among them, the fourth preset air supply rate is greater than the first preset air supply rate, the first preset air supply rate is greater than the third preset air supply rate, the fifth preset air supply rate is less than the fourth preset air supply rate, the fifth preset air supply rate is greater than the first preset air supply rate, and the second preset air supply rate is less than the third preset air supply rate.

[0067] Specifically, the first preset trajectory turning angle density ranges from [0.2 times / m, 0.6 times / m], and the second preset trajectory turning angle density ranges from [0.7 times / m, 1.3 times / m]. Preferably, the first preset trajectory turning angle density is selected as 0.4 times / m, and the second preset trajectory turning angle density is selected as 0.8 times / m.

[0068] Specifically, a trajectory turning angle density less than the first preset trajectory turning angle density indicates that the movement paths of people in the venue are relatively direct, without frequent turns, and the movement paths of people are characterized by long-distance straight lines. Typical scenarios include low-intensity activities such as pre-match warm-up jogging and spectator movement.

[0069] A trajectory turning angle density that is greater than or equal to the first preset trajectory turning angle density and less than the second preset trajectory turning angle density indicates that the intensity of personnel activity in the venue is moderate.

[0070] A trajectory turning angle density greater than or equal to the second preset trajectory turning angle density indicates that people inside the venue are engaging in high-intensity activities and require a larger air supply to regulate the environment.

[0071] Specifically, the trajectory turning angle density within the first preset time period of 15 minutes is the ratio of the total number of acute-angle turns of all personnel in the venue within the first preset time period to the total length of the movement trajectory lines of all personnel in the venue within the first preset time period; and, acute-angle turning of personnel in the venue refers to the turning behavior in which the direction of movement changes and the turning angle is acute (i.e., less than 90°) during the movement of personnel in the venue. When personnel in the venue walk, run or perform other movements, their movement trajectory will form continuous line segments. If the included angle between two adjacent trajectory line segments is less than 90°, the turning behavior is defined as acute-angle turning.

[0072] Specifically, the control module determines whether the air supply meets the preset standard based on the temperature fluctuation value of the densely populated area of ​​movement trajectory within a second preset time period.

[0073] If the temperature fluctuation characterization value is less than the first preset temperature fluctuation characterization value of 0.19, then the air supply is determined to meet the preset standard.

[0074] If the temperature fluctuation characterization value is greater than or equal to the first preset temperature fluctuation characterization value and less than the second preset temperature fluctuation characterization value of 0.64, it is determined that the air supply meets the preset standard, and the air supply meets the preset standard again based on the trajectory turning angle density change rate of the dense motion trajectory area.

[0075] If the temperature fluctuation characterization value is greater than or equal to the second preset temperature fluctuation characterization value, it is determined that the air supply does not meet the preset standard, and the reason for the air supply not meeting the preset standard is determined based on the carbon dioxide concentration in the dense motion trajectory area.

[0076] Specifically, the first preset temperature fluctuation characterization value ranges from [0.10, 0.30], and the second preset temperature fluctuation characterization value ranges from [0.50, 0.67]. Preferably, the first preset temperature fluctuation characterization value is selected as 0.19, and the second preset temperature fluctuation characterization value is selected as 0.64.

[0077] Specifically, when the temperature fluctuation characterization value is less than the first preset temperature fluctuation characterization value, it indicates that the temperature fluctuation is within a small range for most of the air supply time. This means that the output of the air supply system is highly matched with the heat dissipation demand of the densely moving trajectory area, the heat generated by personnel activities can be stably discharged, and the ambient temperature is kept in a comfortable range, without the need for additional adjustment of the air supply strategy. If the temperature fluctuation characterization value is greater than or equal to the first preset temperature fluctuation characterization value and less than the second preset temperature fluctuation characterization value, it indicates that the temperature fluctuation is moderate. This means that the air supply system can basically meet the environmental control requirements, but there is a certain risk of fluctuation. This may be due to changes in the intensity of personnel activities in the densely moving trajectory area, while the response of the air supply system is lagging. Therefore, the trajectory turning angle density change rate is introduced for secondary judgment.

[0078] Specifically, the dense area of ​​movement trajectories is a connected area formed by adjacent high-density floor areas covering several trajectory strip areas. The trajectory strip area is a strip-shaped area with the movement trajectory line of the people in the venue as the center line and extending to both sides with a preset width of 0.5m. The high-density floor area is a floor area with a density value greater than or equal to a preset density value of 0.55.

[0079] Specifically, the process of obtaining the dense area of ​​motion trajectory includes:

[0080] The movement trajectory lines of each person in the venue are obtained within the second preset time period of 10 minutes. Taking the movement trajectory line of each person in the venue as the center line, a preset width of 0.5m is extended to both sides to form the trajectory strip area of ​​each person in the venue.

[0081] Divide the venue floor into several floor areas evenly; calculate the coverage area of ​​each floor area by the trajectory strips of all personnel in the venue;

[0082] The ratio of the covered area to the area of ​​the floor region is recorded as the density value of that floor region;

[0083] Flooring areas with a density value greater than or equal to a preset density value of 0.55 are designated as high-density flooring areas.

[0084] Adjacent high-density floor areas are aggregated into connected areas, which are called dense movement trajectory areas.

[0085] Specifically, the temperature fluctuation characterization value is the ratio of the duration during which the difference between the temperature at a preset height of 1.5m in the venue and the initial temperature at the preset height when the external circulation ventilation module is started is greater than the preset difference of 3.5℃ to the preset ventilation duration of 8min for the external circulation ventilation module.

[0086] Specifically, the control module makes a secondary determination of whether the air supply meets the preset standard based on the rate of change of trajectory turning angle density in the dense area of ​​motion trajectory.

[0087] If the rate of change of trajectory turning angle density is less than the preset rate of change of trajectory turning angle density of 0.59, the air supply is determined to meet the preset standard.

[0088] If the trajectory turning angle density change rate is greater than or equal to the preset trajectory turning angle density change rate, it is determined that the air supply does not meet the preset standard, and the preset cycle is reduced according to the difference between the preset trajectory turning angle density change rate and the trajectory turning angle density change rate.

[0089] The rate of change of trajectory turning angle density is determined by the initial trajectory turning angle density and the final trajectory turning angle density of the dense area of ​​motion trajectory within the second preset time period.

[0090] Specifically, a positive rate of change indicates that the intensity of human activity in densely populated areas is increasing; a negative rate indicates that the intensity of activity is decreasing.

[0091] In this embodiment, the preset trajectory steering angle density change rate is selected as 0.59, but the above value is not limited to this.

[0092] The process of obtaining the trajectory steering angle density change rate includes:

[0093] The difference between the initial trajectory turning angle density of the dense motion trajectory area within the second preset time period and the final trajectory turning angle density of the dense motion trajectory area within the second preset time period is obtained.

[0094] The ratio of this difference to the final trajectory turning angle density of the dense area of ​​motion trajectories within the second preset time period is denoted as the trajectory turning angle density change rate.

[0095] Specifically, the control module has several cycle adjustment methods for reducing the preset cycle, wherein,

[0096] If the difference in trajectory steering angle density is less than the first preset difference of 0.08, then the preset period is reduced to the corresponding value using the first adjustment coefficient of 0.96;

[0097] If the difference in trajectory steering angle density is greater than or equal to the first preset difference and less than the second preset difference of 0.26, then the preset period is reduced to the corresponding value using the second adjustment coefficient of 0.94.

[0098] If the difference in trajectory steering angle density is greater than or equal to the second preset difference, then the preset period is reduced to the corresponding value using a third adjustment coefficient of 0.92.

[0099] The difference in trajectory steering angle density is the difference between the preset trajectory steering angle density change rate and the trajectory steering angle density change rate.

[0100] Specifically, the control module determines the reason why the air supply does not meet the preset standard based on the carbon dioxide concentration in the densely populated area of ​​the motion trajectory.

[0101] If the carbon dioxide concentration is less than the preset carbon dioxide concentration of 900 ppm, the cause is determined to be uneven airflow distribution in the dense motion trajectory area;

[0102] If the carbon dioxide concentration is greater than or equal to the preset carbon dioxide concentration, the cause is determined to be insufficient air supply rate of the external circulation ventilation module. The preset air supply time of the external circulation ventilation module is increased according to the difference between the carbon dioxide concentration and the preset carbon dioxide concentration.

[0103] The carbon dioxide concentration in the densely populated area of ​​the motion trajectory is obtained through the data acquisition module.

[0104] Specifically, the preset carbon dioxide concentration is 900 ppm, but the above values ​​are not limited to this.

[0105] Specifically, the increase in the preset gas delivery time is positively correlated with the difference between the carbon dioxide concentration and the preset carbon dioxide concentration. The positive correlation can be linear or nonlinear. The slope of the linear positive correlation is not specifically limited. It can be understood that the greater the difference between the carbon dioxide concentration and the preset carbon dioxide concentration, the greater the increase in the preset gas delivery time.

[0106] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles 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 scope of protection of the present invention.

[0107] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air supply system for regulating an environment of a venue floor, characterized by, The application comprises: an inner circulation air supply module for enclosing the air in the venue; an outer circulation air exchange module for exchanging the air in the venue with outdoor fresh air; a data acquisition module comprising a trajectory acquisition unit arranged in the center of the ceiling of the venue for acquiring the trajectories of the people in the venue, a temperature acquisition unit arranged on the side wall of the venue for acquiring the temperature in the venue, and a carbon dioxide concentration acquisition unit arranged on the side wall of the venue for acquiring the carbon dioxide concentration in the venue; a strategy determination module connected to the data acquisition module for determining the air supply strategy of the venue according to the trajectory turning angle density in a first preset time period; a control module connected to the data acquisition module and the strategy determination module respectively for determining whether the air supply meets the preset standard according to the temperature fluctuation characteristic value of the motion trajectory dense area in a second preset time period, and determining the reason why the air supply does not meet the preset standard according to the carbon dioxide concentration of the motion trajectory dense area; the strategy determination module determines the air supply strategy of the venue according to the trajectory turning angle density in a first preset time period, wherein, if the trajectory turning angle density is less than a first preset trajectory turning angle density, it is determined that the inner circulation air supply module supplies air at a first preset air supply rate and the outer circulation air exchange module intermittently opens air supply at a second preset air supply rate at a preset period; if the trajectory turning angle density is greater than or equal to the first preset trajectory turning angle density and less than a second preset trajectory turning angle density, it is determined that the outer circulation air exchange module intermittently opens air supply at a second preset air supply rate at a preset period, and the inner circulation air supply module supplies air at a third preset air supply rate; if the trajectory turning angle density is greater than or equal to the second preset trajectory turning angle density, it is determined that the inner circulation air supply module supplies air at a fourth preset air supply rate and the outer circulation air exchange module supplies air at a fifth preset air supply rate; wherein the fourth preset air supply rate is greater than the first preset air supply rate, the first preset air supply rate is greater than the third preset air supply rate, the fifth preset air supply rate is less than the fourth preset air supply rate, the fifth preset air supply rate is greater than the first preset air supply rate, and the second preset air supply rate is less than the third preset air supply rate; the trajectory turning angle density in the first preset time period is the ratio of the total number of acute angle turning of all people in the venue in the first preset time period to the total length of the motion trajectory lines of all people in the venue in the first preset time period; the motion trajectory dense area is a connected area formed by adjacent high-density floor areas covering several trajectory strip areas, wherein the trajectory strip area is a strip-shaped area with the motion trajectory line of the people in the venue as the center line and extending a preset width on both sides, and the high-density floor area is a floor area with a density value greater than or equal to a preset density value; the temperature fluctuation characteristic value is the ratio of the time length during which the difference between the temperature of a preset height of the venue during the air supply process of the outer circulation air exchange module and the initial temperature of the preset height when the outer circulation air exchange module is started is greater than a preset difference value to the preset air supply time length of the outer circulation air exchange module.

2. An air supply system for regulating the environment of a venue floor according to claim 1, characterized in that, The control module determines whether the air supply meets the preset standard according to a temperature fluctuation characteristic value of the motion trajectory dense area in a second preset time period, wherein If the temperature fluctuation characteristic value is less than a first preset temperature fluctuation characteristic value, it is determined that the air supply meets the preset standard; If the temperature fluctuation characteristic value is greater than or equal to the first preset temperature fluctuation characteristic value and less than a second preset temperature fluctuation characteristic value, it is determined that the air supply meets the preset standard, and whether the air supply meets the preset standard is determined again according to a trajectory turning angle density change rate of the motion trajectory dense area; If the temperature fluctuation characteristic value is greater than or equal to the second preset temperature fluctuation characteristic value, it is determined that the air supply does not meet the preset standard, and the reason why the air supply does not meet the preset standard is determined according to a carbon dioxide concentration of the motion trajectory dense area.

3. An air supply system for regulating the environment of a venue floor according to claim 2, characterized in that, The control module determines whether the air supply meets the preset standard according to a trajectory turning angle density change rate of the motion trajectory dense area, wherein If the trajectory turning angle density change rate is less than a preset trajectory turning angle density change rate, it is determined that the air supply meets the preset standard; If the trajectory turning angle density change rate is greater than or equal to the preset trajectory turning angle density change rate, it is determined that the air supply does not meet the preset standard, and the preset period is reduced according to a difference between the preset trajectory turning angle density change rate and the trajectory turning angle density change rate. The trajectory turning angle density change rate is determined by an initial trajectory turning angle density and a final trajectory turning angle density of the motion trajectory dense area in the second preset time period.

4. An air supply system for regulating the environment of a venue floor according to claim 3, characterized in that, The control module is provided with a plurality of period adjustment modes for the reduction of the preset period, wherein If the trajectory turning angle density change difference is less than a first preset change difference, the preset period is reduced to a corresponding value by using a first adjustment coefficient; If the trajectory turning angle density change difference is greater than or equal to the first preset change difference and less than a second preset change difference, the preset period is reduced to a corresponding value by using a second adjustment coefficient; If the trajectory turning angle density change difference is greater than or equal to the second preset change difference, the preset period is reduced to a corresponding value by using a third adjustment coefficient; The trajectory turning angle density change difference is a difference between the preset trajectory turning angle density change rate and the trajectory turning angle density change rate.

5. An air supply system for regulating the environment of a venue floor according to claim 4, characterized in that, The control module determines the reason why the air supply does not meet the preset standard according to the carbon dioxide concentration of the motion trajectory dense area, wherein If the carbon dioxide concentration is less than a preset carbon dioxide concentration, it is determined that the reason is that the airflow distribution of the motion trajectory dense area is uneven; If the carbon dioxide concentration is greater than or equal to the preset carbon dioxide concentration, it is determined that the reason is that the air supply rate of the external circulation ventilation module is insufficient, and a preset air supply time length of the external circulation ventilation module is increased according to a difference between the carbon dioxide concentration and the preset carbon dioxide concentration; The carbon dioxide concentration of the motion trajectory dense area is obtained by the data acquisition module.

6. An air supply system for regulating the environment of a venue floor according to claim 5, characterized in that, The increase amplitude of the preset air supply time length is positively correlated with the difference between the carbon dioxide concentration and the preset carbon dioxide concentration.

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