Football field lawn root ventilation and negative pressure drainage system and control method thereof

Abstract

The present application relates to a kind of football field lawn root ventilation and negative pressure drainage system and its control method, system includes: ventilation drainage pipe network, including pipe network main pipeline and several pipe network branch pipeline, pipe network main pipeline and pipe network branch pipeline and gas-water separation well are communicated;Send exhaust module, including the gas-water separation well and ventilation louver with the communication of send exhaust main pipeline, ventilation air conditioning unit is set on send exhaust main pipeline, first air valve is located between ventilation air conditioning unit and gas-water separation well, second air valve is located between ventilation air conditioning unit and ventilation louver, one end of first bypass is accessed between first air valve and ventilation air conditioning unit, the other end is accessed between second air valve and ventilation louver, and third air valve is arranged on it, one end of second bypass is accessed between gas-water separation well and first air valve, the other end is accessed between ventilation air conditioning unit and second air valve, and fourth air valve is arranged on it.Control the opening and closure of each air valve can meet the working condition demand of air supply, exhaust and negative pressure drainage.

Description

Technical Field

[0001] This invention relates to the field of ventilation and drainage technology, and in particular to a ventilation and negative pressure drainage system for the roots of a football field lawn and its control method. Background Technology

[0002] The quality of a football field's turf has a significant impact on the game, especially in professional football stadiums used for large-scale matches. The quality requirements for the turf are extremely high, demanding not only smoothness and uniformity but also control over its elasticity, rolling friction, and sliding friction properties. Football field grasses can be categorized into warm-season and cool-season turfgrasses. Warm-season turfgrasses thrive best at temperatures between 26℃ and 35℃, entering dormancy below 10℃. Cool-season turfgrasses thrive best between 15℃ and 25℃; growth slows above 30℃, and poor management during hot summers can lead to yellowing and decay. In my country, high-standard football fields in northern regions often use cool-season grasses. However, cool-season grasses primarily face summer survival challenges. The sustained high temperatures and humidity of summer make them susceptible to summer spot and Pythium diseases, which can rapidly infect the entire field, causing turf death. In southern regions, warm-season turfgrass is often used, which is more suitable for grass growth and produces high-quality lawns. However, the main problem is that the green period is relatively short and the grass will go dormant in winter.

[0003] Meanwhile, artificial turf in football fields differs from other crops. Its root system is interconnected, with strong clay content, making it prone to soil compaction and poor aeration. The dense, intertwined root system of artificial turf makes it susceptible to waterlogging in low-lying areas, leading to root rot. Excessive trampling further compacts the soil, hindering root respiration and drainage, causing further deterioration. If the turf roots remain in a poorly ventilated and aerated environment for extended periods, it not only affects the turf's growth but can also lead to root rot, causing large areas of turf to die and severely impacting the overall quality of the lawn. Summary of the Invention

[0004] The purpose of this invention is to provide a ventilation and negative pressure drainage system for the roots of a football field lawn and its control method, which can meet the working conditions of air supply, exhaust and negative pressure drainage, provide a suitable temperature environment for the roots of the lawn, enhance ventilation at the roots of the lawn, and accelerate the drainage of the lawn during heavy rain and storms, providing a complete set of technical protection measures for high-quality lawns.

[0005] To achieve the above objectives, the present invention provides a ventilation and negative pressure drainage system for the roots of a football field turf, comprising a ventilation and drainage pipe network, an air-water separation well, and a supply and exhaust air module, wherein: The ventilation and drainage network includes a main pipeline and several branch pipelines. The branch pipelines are evenly distributed in the soil at the root of the lawn and are connected to one end of the main pipeline. The other end of the main pipeline is connected to the gas-water separation well. Several through holes are opened on the branch pipelines. The air supply and exhaust module includes a ventilation and air conditioning unit, ventilation louvers, a main air supply and exhaust pipeline, a first bypass, and a second bypass. One end of the main air supply and exhaust pipeline is connected to the gas-water separation well, and the other end is connected to the ventilation louvers. The ventilation and air conditioning unit is installed on the main air supply and exhaust pipeline, and a first air valve and a second air valve are installed on the main air supply and exhaust pipeline. The first air valve is located between the ventilation and air conditioning unit and the gas-water separation well, and the second air valve is located between the ventilation and air conditioning unit and the ventilation louvers. One end of the first bypass is connected to the main air supply and exhaust pipeline between the first air valve and the ventilation and air conditioning unit, and the other end of the first bypass is connected to the main air supply and exhaust pipeline between the second air valve and the ventilation louvers. A third air valve is installed on the first bypass. One end of the second bypass is connected to the main air supply and exhaust pipeline between the gas-water separation well and the first air valve, and the other end of the second bypass is connected to the main air supply and exhaust pipeline between the ventilation and air conditioning unit and the second air valve. A fourth air valve is installed on the second bypass.

[0006] Optionally, the ventilation and negative pressure drainage system at the base of the football field turf also includes a control module, wherein the ventilation and air conditioning unit, the first air valve, the second air valve, the third air valve and the fourth air valve are respectively connected to the control module in communication.

[0007] Optionally, the first air valve, the second air valve, the third air valve, and the fourth air valve are all electric air valves.

[0008] Optionally, the ventilation and air conditioning unit includes a cooling and heating unit and a fan respectively connected to the control module. The fan is used to supply air to the ventilation and drainage pipe network and to draw exhaust air from the ventilation and drainage pipe network. The cooling and heating unit is used to adjust the supply air temperature.

[0009] Optionally, the ventilation and air conditioning unit further includes a temperature and humidity sensor and a humidifier respectively connected to the control module. The temperature and humidity sensor is used to monitor the temperature and humidity of the supplied air, and the control module is used to control the operation of the cooling and heating unit and the humidifier according to the temperature and humidity monitored by the temperature and humidity sensor.

[0010] Optionally, the football field turf root ventilation and negative pressure drainage system also includes a temperature sensor installed in the soil at the turf roots. The temperature sensor is communicatively connected to the control module, and the control module is used to adjust the operation of the cooling and heating unit according to the soil temperature monitored by the temperature sensor.

[0011] Optionally, a wind pressure sensor is installed on the main pipeline of the pipeline network and is communicatively connected to the control module. The control module is used to adjust the operating frequency of the fan based on the static pressure value monitored by the wind pressure sensor.

[0012] Optionally, the gas-water separation well is also equipped with a submersible pump and a liquid level sensor that are respectively connected to the control module. The control module is used to control the operation of the submersible pump based on the liquid level value monitored by the liquid level sensor.

[0013] Optionally, the branch pipes of the pipeline network are provided with a drainage slope and slope towards the main pipeline network, and the main pipeline network is provided with a drainage slope and slopes towards the gas-water separation well.

[0014] Based on the same technical concept, the present invention also provides a control method for controlling the switching of operating conditions of the football field turf root ventilation and negative pressure drainage system as described above, including: When switching to air supply mode, close the first and second air valves, open the third and fourth air valves, and start the ventilation and air conditioning unit so that outdoor air is drawn in through the ventilation louvers and sequentially passes through the first bypass, the ventilation and air conditioning unit, the second bypass, the main supply and exhaust air pipeline, the gas-water separation well, and the main pipeline into each branch pipeline, and then enters the soil at the root of the lawn through the through holes on the branch pipeline. When switching to exhaust mode, the first air valve and the second air valve are opened, the third air valve and the fourth air valve are closed, and the ventilation and air conditioning unit is started so that the ventilation and drainage pipe network enters a negative pressure state. The air in the soil at the root of the lawn enters the interior of the pipe network branch pipe through the through holes on the pipe network branch pipe and is discharged outdoors in sequence through the main pipe network, the air-water separation well, the supply and exhaust air main pipe and the ventilation louvers. When switching to negative pressure drainage mode, open the first air valve and the second air valve, close the third air valve and the fourth air valve, and start the ventilation and air conditioning unit to put the ventilation and drainage pipe network into a negative pressure state. Air and rainwater in the soil at the root of the lawn enter the interior of the pipe network branch pipe through the through holes on the pipe network branch pipe. The exhaust air entering the pipe network branch pipe passes through the main pipe network, the air-water separation well, the supply and exhaust air main pipe and the ventilation louvers in sequence before being discharged outdoors. Rainwater entering the pipe network branch pipe flows to the air-water separation well through the main pipe network.

[0015] In the football field turf root ventilation and negative pressure drainage system and its control method provided by the present invention, the working conditions of air supply, exhaust and negative pressure drainage can be met by controlling the opening and closing of each air valve, providing a suitable temperature environment for the turf roots, enhancing ventilation at the turf roots, and accelerating turf drainage during heavy rain and storms, providing a complete set of technical protection measures for high-quality turf. Attached Figure Description

[0016] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein: Figure 1 A schematic diagram of a ventilation and negative pressure drainage system for the roots of a football field lawn, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of a ventilation and air conditioning unit provided in an embodiment of the present invention.

[0017] in: 101-Main pipeline of the pipeline network; 102-Branch pipeline of the pipeline network; 201-Gas-water separation well; 202-Submersible pump; 301-Ventilation and air conditioning unit; 302-Ventilation louvers; 303-Supply and exhaust main pipeline; 304-First bypass; 305-Second bypass; 401-First air valve; 402-Second air valve; 403-Third air valve; 404-Fourth air valve; 3011-Refrigeration and heating unit; 3012-Fan; 3013-Temperature and humidity sensor; 3014-Humidifier; 3015-Filter; 3016-Electric bypass valve. Detailed Implementation

[0018] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clearly illustrate the purpose of the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this invention. Any modifications to the structure, changes in proportions, or adjustments to the size, if they are the same as or similar to the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0019] As used herein, the singular forms “a,” “an,” and “the” include plural objects unless otherwise expressly indicated. As used herein, the term “or” is generally used to include “and / or” unless otherwise expressly indicated. As used herein, the term “a number” is generally used to include “at least one” unless otherwise expressly indicated. As used herein, the term “at least two” is generally used to include “two or more” unless otherwise expressly indicated. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature.

[0020] Please refer to Figure 1 This embodiment provides a ventilation and negative pressure drainage system for the roots of a football field lawn, including a ventilation and drainage pipe network, an air-water separation well 201, and a supply and exhaust air module, wherein: The ventilation and drainage network includes a main pipeline 101 and several branch pipelines 102. The branch pipelines 102 are evenly distributed in the soil at the root of the lawn and are connected to one end of the main pipeline 101. The other end of the main pipeline 101 is connected to the gas-water separation well 201. Several through holes are opened on the branch pipelines 102. The air supply and exhaust module includes a ventilation and air conditioning unit 301, ventilation louvers 302, a main air supply and exhaust pipe 303, a first bypass 304, and a second bypass 305. One end of the main air supply and exhaust pipe 303 is connected to the gas-water separation well 201, and the other end is connected to the ventilation louvers 302. The ventilation and air conditioning unit 301 is installed on the main air supply and exhaust pipe 303, and a first air valve 401 and a second air valve 402 are installed on the main air supply and exhaust pipe 303. The first air valve 401 is located between the ventilation and air conditioning unit 301 and the gas-water separation well 201, and the second air valve 402 is located between the ventilation and air conditioning unit 301 and the ventilation louvers 302. One end of the first bypass 304 is connected to the main supply and exhaust air pipeline 303 between the first air valve 401 and the ventilation and air conditioning unit 301, and the other end of the first bypass 304 is connected to the main supply and exhaust air pipeline 303 between the second air valve 402 and the ventilation louver 302. A third air valve 403 is provided on the first bypass 304. One end of the second bypass 305 is connected to the main supply and exhaust air pipeline 303 between the gas-water separation well 201 and the first air valve 401, and the other end of the second bypass 305 is connected to the main supply and exhaust air pipeline 303 between the ventilation and air conditioning unit 301 and the second air valve 402. A fourth air valve 404 is provided on the second bypass 305.

[0021] By controlling the opening and closing of each air valve, the operating conditions of air supply, exhaust and negative pressure drainage can be met, providing a suitable temperature environment for the lawn roots, enhancing ventilation at the lawn roots, and accelerating lawn drainage during heavy rain and storms, providing a complete set of technical protection measures for high-quality lawns.

[0022] Specifically, the main pipeline 101 and several branch pipelines 102 are all made of HDPE pipe. The diameter of the main pipeline 101 is between De400 and De700, and the diameter of the branch pipelines 102 is between De100 and De200. The branch pipelines 102 are provided with through holes at the top, and the diameter of the through holes is between 8mm and 12mm. The through holes are arranged at equal intervals along the axial direction of the branch pipelines 102, and the interval is between 100mm and 200mm.

[0023] In this embodiment, the gas-water separation well 201 is mainly for collecting rainwater and preventing rainwater from entering the ventilation and air conditioning unit 301 through the main air supply and exhaust pipeline 303.

[0024] Preferably, the ventilation and negative pressure drainage system at the base of the football field turf also includes a control module. The ventilation and air conditioning unit 301, the first air valve 401, the second air valve 402, the third air valve 403, and the fourth air valve 404 are all communicatively connected to the control module. The control module includes, but is not limited to, a PLC, which is mainly used to realize the automatic control of the ventilation and negative pressure drainage system at the base of the football field turf, such as controlling the operation of the ventilation and air conditioning unit 301 and the opening and closing of each air valve to meet the switching requirements of different operating conditions.

[0025] In this embodiment, the PLC is a device well known in the art, and the present invention does not make any improvements to it, nor does it involve any improvement to the computer program. Those skilled in the art should know how to specifically implement the communication connection between the PLC and the various components.

[0026] In this embodiment, the first air valve 401, the second air valve 402, the third air valve 403, and the fourth air valve 404 are all electric air valves.

[0027] Please refer to Figure 2 The ventilation and air conditioning unit 301 includes a cooling and heating unit 3011 and a fan 3012, both connected to a control module. The fan 3012 supplies air to the ventilation and drainage network and draws exhaust air from the network. The cooling and heating unit 3011 regulates the supply air temperature. In this embodiment, the cooling and heating unit 3011 is, for example, a cooling and heating coil, which heats or cools the supply air according to the temperature requirements of the soil at the roots of the lawn. The fan 3012 pressurizes the supply air and draws negative pressure exhaust air from the ventilation and drainage network.

[0028] Preferably, the ventilation and air conditioning unit 301 further includes a temperature and humidity sensor 3013 and a humidifier 3014, which are respectively connected to the control module. The temperature and humidity sensor 3013 is used to monitor the temperature and humidity of the supplied air, and the control module is used to control the operation of the cooling and heating unit 3011 and the humidifier 3014 according to the temperature and humidity monitored by the temperature and humidity sensor 3013.

[0029] For example, if the soil temperature at the lawn root area is monitored at 29℃ in summer, compared to the set temperature of 13-27℃ (which can be set according to the needs of different grass species), the temperature is clearly too high. The control module can then control the cooling and heating unit 3011 to increase its cooling capacity, thereby lowering the air supply temperature and thus reducing the soil temperature at the lawn root area. Conversely, if the soil temperature at the lawn root area is below the set range in winter, the control module can control the cooling and heating unit 3011 to increase its heating capacity, thereby raising the air supply temperature. Simultaneously, to prevent the dry, hot air from causing a "drying" effect on the soil, the control module will also simultaneously control the humidifier 3014 to increase the humidity of the air supply, thus ensuring that the soil temperature at the lawn root area remains within the set range and preventing the soil from drying out due to the hot air supply.

[0030] It should be understood that the temperature and humidity sensor 3013 can be used to monitor the temperature and humidity of the soil at the root of the lawn simultaneously, or the temperature sensor and humidity sensor can be used to monitor the temperature and humidity of the soil at the root of the lawn separately. This invention does not limit this.

[0031] In addition, the ventilation and air conditioning unit 301 may also include at least one filter 3015, which is disposed before the cooling and heating unit 3011 and connected to the air inlet of the cooling and heating unit 3011. The filter 3015 is used to filter and purify the air entering the cooling and heating unit 3011.

[0032] Preferably, the ventilation and air conditioning unit 301 also includes an electric bypass valve 3016. The electric bypass valve 3016 is communicatively connected to the control module. The electric bypass valve 3016 is mainly used when the exhaust, drainage and cooling / heating units 3011 are not required to operate. At this time, opening the electric bypass valve 3016 can significantly reduce the resistance borne by the fan 3012 and achieve energy-saving operation.

[0033] Preferably, the ventilation and negative pressure drainage system at the base of the football field turf also includes a temperature sensor installed in the soil at the base of the turf. The temperature sensor is communicatively connected to a control module, which adjusts the operation of the cooling and heating unit 3011 based on the soil temperature monitored by the temperature sensor. For example, in the air supply mode, the control module monitors the soil temperature at the base of the turf in real time through the temperature sensor and adjusts the operation of the cooling and heating unit 3011 according to the real-time monitored soil temperature to ensure that the soil temperature is within the set range.

[0034] Preferably, a wind pressure sensor is installed on the main pipeline 101 of the pipeline network and is connected to the control module. The control module is used to adjust the operating frequency of the fan 3012 according to the static pressure value monitored by the wind pressure sensor in order to maintain the static pressure value in the main pipeline 101 of the pipeline network within the set range.

[0035] For example, in the case of air supply, if the static pressure at the wind pressure sensor is set to 1200 Pa, and the real-time static pressure value monitored by the wind pressure sensor is 1400 Pa, it indicates that the static pressure value is too high. The operating frequency of the fan 3012 can be appropriately reduced so that the static pressure value in the main pipeline 101 of the pipeline network reaches the set value. As another example, assuming the case of negative pressure drainage, if the static pressure at the wind pressure sensor is set to -1500 Pa, and the real-time static pressure value monitored by the wind pressure sensor is -1300 Pa, it indicates that the negative static pressure value is insufficient. The operating frequency of the fan 3012 needs to be increased so that the static pressure value in the main pipeline 101 of the pipeline network reaches the set negative static pressure value to accelerate drainage.

[0036] Preferably, the gas-water separation well 201 is also equipped with a submersible pump 202 and a liquid level sensor that are respectively connected to the control module. The control module is used to control the operation of the submersible pump 202 according to the liquid level value monitored by the liquid level sensor.

[0037] Specifically, when switching to negative pressure drainage mode (generally activated during heavy rain or storms to accelerate site drainage), under the control of the control module, the first air valve 401 and the second air valve 402 are opened, the third air valve 403 and the fourth air valve 404 are closed, and the ventilation and air conditioning unit 301 is started to put the ventilation and drainage network into a negative pressure state. Air and rainwater in the soil at the roots of the lawn enter the interior of the branch pipe 102 through the through holes on the branch pipe 102. The exhaust air entering the branch pipe 102 passes through the main pipe 101, the air-water separation well 201, the supply and exhaust main pipe 303, the ventilation and air conditioning unit 301, and the ventilation louvers 302 before being discharged outdoors. The rainwater entering the branch pipe 102 flows to the air-water separation well 201 through the main pipe 101. Meanwhile, the control module monitors the liquid level in the gas-water separation well 201 in real time through a liquid level sensor. When the liquid level reaches a high level, the submersible pump 202 is activated to drain water in real time (such as into a municipal rainwater well). When the liquid level drops to a low level, the submersible pump 202 is turned off to ensure that the liquid level in the gas-water separation well 201 is always between the high and low levels. At the same time, the control module calculates and adjusts the operating frequency of the blower 3012 by monitoring the static pressure value through a wind pressure sensor to ensure that the static pressure in the main pipeline 101 of the pipeline network is maintained at the set negative pressure value to accelerate drainage.

[0038] Preferably, the branch pipe 102 is provided with a drainage slope and slopes towards the main pipe 101, and the main pipe 101 is provided with a drainage slope and slopes towards the gas-water separation well, so that the rainwater entering the branch pipe 102 can flow towards the main pipe 101 by gravity along the drainage slope, and then flow towards the gas-water separation well 201 by gravity along the main pipe 101.

[0039] Based on this, embodiments of the present invention also provide a control method for controlling the switching of operating conditions of the football field turf root ventilation and negative pressure drainage system as described above, including: When switching to air supply mode, close the first air valve 401 and the second air valve 402, open the third air valve 403 and the fourth air valve 404, and start the ventilation and air conditioning unit 301 so that outdoor air is drawn in through the ventilation louvers 302 and sequentially passes through the first bypass 304, the ventilation and air conditioning unit 301, the second bypass 305, the main supply and exhaust air pipeline 303, the gas-water separation well 201, and the main pipeline 101 into each branch pipeline 102, and then enters the soil at the root of the lawn through the through holes on the branch pipeline 102. When switching to exhaust mode, open the first air valve 401 and the second air valve 402, close the third air valve 403 and the fourth air valve 404, and start the ventilation and air conditioning unit 301 so that the ventilation and drainage pipe network enters a negative pressure state. The air in the soil at the root of the lawn enters the interior of the pipe network branch pipe 102 through the through hole on the pipe network branch pipe 102 and passes through the main pipe network 101, the air-water separation well 201, the supply and exhaust main pipe 303 (through which the ventilation and air conditioning unit 301 flows) and the ventilation louvers 302 before being discharged outdoors.

[0040] When switching to negative pressure drainage mode, open the first air valve 401 and the second air valve 402, close the third air valve 403 and the fourth air valve 404, and start the ventilation and air conditioning unit 301 so that the ventilation and drainage pipe network enters a negative pressure state. Air and rainwater in the soil at the root of the lawn enter the interior of the branch pipe 102 through the through holes on the branch pipe 102. The exhaust air entering the branch pipe 102 passes through the main pipe 101, the air-water separation well 201, the supply and exhaust main pipe 303 (through which the ventilation and air conditioning unit 301 flows) and the ventilation louvers 302 before being discharged outdoors. The rainwater entering the branch pipe 102 flows through the main pipe 101 to the air-water separation well 201.

[0041] Preferably, when switching to the air supply mode, the control module calculates and adjusts the operating frequency of the fan 3012 based on the static pressure value monitored by the wind pressure sensor to ensure that the static pressure in the main pipeline 101 is maintained at the set positive pressure value, thereby ensuring smooth air supply; when switching to the exhaust or negative pressure drainage mode, the control module calculates and adjusts the operating frequency of the fan 3012 based on the static pressure value monitored by the wind pressure sensor to ensure that the static pressure in the main pipeline 101 is maintained at the set negative pressure value, thereby achieving negative pressure exhaust or drainage and improving the efficiency of exhaust or drainage.

[0042] In summary, the embodiments of the present invention provide a ventilation and negative pressure drainage system for the roots of a football field lawn and its control method. By controlling the opening and closing of each air valve, the system can meet the working requirements of air supply, exhaust and negative pressure drainage, provide a suitable temperature environment for the roots of the lawn, enhance ventilation at the roots of the lawn, and accelerate lawn drainage during heavy rain and storms, providing a complete set of technical protection measures for high-quality lawns.

[0043] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A ventilation and negative pressure drainage system for the roots of a football field lawn, characterized in that, This includes ventilation and drainage pipe networks, air-water separation wells, and air supply and exhaust modules, among which: The ventilation and drainage network includes a main pipeline and several branch pipelines. The branch pipelines are evenly distributed in the soil at the root of the lawn and are interconnected with one end of the main pipeline. The other end of the main pipeline is connected to the air-water separation well. Several through holes are opened on the branch pipelines. The branch pipelines have a drainage slope that slopes towards the main pipeline, and the main pipeline has a drainage slope that slopes towards the air-water separation well, forming a two-stage gravity-fed drainage slope. The air supply and exhaust module includes a ventilation and air conditioning unit, ventilation louvers, a main air supply and exhaust pipeline, a first bypass, and a second bypass. One end of the main air supply and exhaust pipeline is connected to the gas-water separation well, and the other end is connected to the ventilation louvers. The ventilation and air conditioning unit is installed on the main air supply and exhaust pipeline, and a first air valve and a second air valve are installed on the main air supply and exhaust pipeline. The first air valve is located between the ventilation and air conditioning unit and the gas-water separation well, and the second air valve is located between the ventilation and air conditioning unit and the ventilation louvers. One end of the first bypass is connected to the main air supply and exhaust pipeline between the first air valve and the ventilation and air conditioning unit, and the other end of the first bypass is connected to the main air supply and exhaust pipeline between the second air valve and the ventilation louvers. A third air valve is installed on the first bypass, and one end of the second bypass... The second bypass is connected to the main air supply and exhaust pipeline between the gas-water separation well and the first air valve. The other end of the second bypass is connected to the main air supply and exhaust pipeline between the ventilation and air conditioning unit and the second air valve, and a fourth air valve is provided on the second bypass. The ventilation and air conditioning unit also includes a filter, a cooling and heating unit, an electric bypass valve, a humidifier, and a fan. The filter, cooling and heating unit, electric bypass valve, humidifier, and fan are arranged sequentially along the airflow direction inside the ventilation and air conditioning unit. The first bypass and the second bypass are connected in parallel at both ends of the ventilation and air conditioning unit to form a free-flow bypass loop. When the exhaust, drainage, and air supply conditions of the cooling and heating unit are not required to work are met, the first air valve and the second air valve are closed. The airflow bypasses the heat exchange section of the cooling and heating unit through the two bypasses, and the electric bypass valve is opened simultaneously to depressurize the pipeline.

2. The football field turf root ventilation and negative pressure drainage system according to claim 1, characterized in that, The ventilation and negative pressure drainage system at the base of the football field lawn also includes a control module. The ventilation and air conditioning unit, the first air valve, the second air valve, the third air valve, and the fourth air valve are all communicatively connected to the control module.

3. The football field turf root ventilation and negative pressure drainage system according to claim 2, characterized in that, The first air valve, the second air valve, the third air valve, and the fourth air valve are all electric air valves.

4. The football field turf root ventilation and negative pressure drainage system according to claim 2, characterized in that, The cooling and heating unit and the fan are respectively connected to the control module. The fan is used to supply air to the ventilation and drainage network and to draw out the exhaust air from the ventilation and drainage network. The cooling and heating unit is used to adjust the supply air temperature.

5. The football field turf root ventilation and negative pressure drainage system according to claim 4, characterized in that, The ventilation and air conditioning unit also includes a temperature and humidity sensor. The temperature and humidity sensor and the humidifier are respectively connected to the control module. The temperature and humidity sensor is used to monitor the temperature and humidity of the supplied air. The control module is used to control the operation of the cooling and heating unit and the humidifier based on the temperature and humidity monitored by the temperature and humidity sensor.

6. The football field turf root ventilation and negative pressure drainage system according to claim 4 or 5, characterized in that, The ventilation and negative pressure drainage system at the base of the football field lawn also includes a temperature sensor installed in the soil at the base of the lawn. The temperature sensor is communicatively connected to the control module, which is used to adjust the operation of the cooling and heating unit according to the soil temperature monitored by the temperature sensor.

7. The football field turf root ventilation and negative pressure drainage system according to claim 4, characterized in that, A wind pressure sensor is installed on the main pipeline of the pipeline network and is connected to the control module. The control module is used to adjust the operating frequency of the fan according to the static pressure value monitored by the wind pressure sensor.

8. The football field turf root ventilation and negative pressure drainage system according to claim 2, characterized in that, The gas-water separation well is also equipped with a submersible pump and a liquid level sensor that are respectively connected to the control module. The control module is used to control the operation of the submersible pump based on the liquid level value monitored by the liquid level sensor.

9. A control method for controlling the switching of operating conditions of a football field turf root ventilation and negative pressure drainage system according to any one of claims 1-8, characterized in that, include: When switching to air supply mode, the first and second air valves are closed, the third and fourth air valves are opened, and the ventilation and air conditioning unit is started so that outdoor air is drawn in through the ventilation louvers and sequentially passes through the first bypass, the ventilation and air conditioning unit, the second bypass, the main supply and exhaust air pipeline, the gas-water separation well, and the main pipeline into each of the branch pipelines, and then enters the soil at the root of the lawn through the through holes on the branch pipelines. When switching to exhaust mode, the first air valve and the second air valve are opened, the third air valve and the fourth air valve are closed, and the ventilation and air conditioning unit is started so that the ventilation and drainage pipe network enters a negative pressure state. The air in the soil at the root of the lawn enters the interior of the pipe network branch pipe through the through holes on the pipe network branch pipe and is discharged outdoors in sequence through the main pipe network, the air-water separation well, the supply and exhaust air main pipe and the ventilation louvers. When switching to negative pressure drainage mode, open the first air valve and the second air valve, close the third air valve and the fourth air valve, and start the ventilation and air conditioning unit to put the ventilation and drainage pipe network into a negative pressure state. Air and rainwater in the soil at the root of the lawn enter the interior of the pipe network branch pipe through the through holes on the pipe network branch pipe. The exhaust air entering the pipe network branch pipe passes through the main pipe network, the air-water separation well, the supply and exhaust air main pipe and the ventilation louvers in sequence before being discharged outdoors. Rainwater entering the pipe network branch pipe flows to the air-water separation well through the main pipe network.

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