Tunnel power distribution room, fresh air control method based on same and fresh air system

Abstract

The application discloses a tunnel power distribution room, a fresh air control method and a fresh air system. The power distribution room comprises an electrical equipment room, an air heat exchange chamber and an air purification chamber which are arranged on the two sides of the electrical equipment room respectively, and the air heat exchange chamber is provided with a fresh air device on the side adjacent to the tunnel. The tunnel power distribution room is provided with a first exhaust module which can be started when the ambient temperature is higher than a set temperature, a second exhaust module which can be started when the ambient temperature is lower than the set temperature, a temperature control module for monitoring the ambient temperature and a control module. The control module starts the first exhaust module or the second exhaust module according to the set temperature of the temperature control module and the monitored ambient temperature. The first exhaust module is arranged in the electrical equipment room and the air heat exchange chamber, and the second exhaust module is arranged in the air purification chamber. The power distribution room can select different operation modes to cool the electrical equipment room according to the temperature of different seasons and climates, and the electric power resource is effectively saved.

Description

Technical Field

[0001] This invention relates to the field of tunnel ventilation technology, specifically to a tunnel power distribution room, a fresh air control method based thereon, and a fresh air system. Background Technology

[0002] The challenges of cooling and dehumidifying in tunnel power distribution rooms have always affected the safe and efficient operation of facilities and equipment. If the electromechanical equipment in the power distribution room malfunctions due to temperature and humidity, the power distribution room will not be able to operate normally, thereby affecting safe driving in highway tunnels and potentially causing traffic accidents, resulting in significant loss of life and property.

[0003] Some enclosed power distribution rooms use air conditioning for cooling. Because these rooms are located in the middle of long tunnels, they are affected by factors such as vehicle exhaust and dust. The heat sink of the air conditioning unit is easily blocked by oily dust, and the air conditioning must be professionally cleaned and maintained every month, which is quite expensive.

[0004] Therefore, ensuring a good operating environment for the power distribution room, including dust prevention, cooling, and dehumidification, is crucial for the efficient operation of the power distribution room and is also an important basic guarantee for ensuring the smooth operation of highways. Summary of the Invention

[0005] The technical problem that this invention aims to solve is that existing tunnel power distribution rooms are difficult to dustproof, cool down and dehumidify, prone to equipment failure and have high maintenance costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a tunnel power distribution room, which includes an electrical equipment room and an air heat exchange room and an air purification room respectively located on both sides of the electrical equipment room. The air heat exchange room is equipped with a fresh air device on the side adjacent to the tunnel, which is used to introduce air from the tunnel side into the tunnel.

[0008] The tunnel power distribution room is equipped with a first exhaust module that can be activated when the ambient temperature is higher than the set temperature, a second exhaust module that can be activated when the ambient temperature is lower than the set temperature, a temperature control module for monitoring the ambient temperature, and a control module. The control module activates the first exhaust module or the second exhaust module according to the temperature set by the temperature control module and the monitored ambient temperature.

[0009] The first exhaust module is installed in the electrical equipment room and the air heat exchange room, and the second exhaust module is installed in the air purification room.

[0010] Furthermore, the temperature control module and the control module are located in the air heat exchange chamber; the first exhaust module includes an air conditioner and a first exhaust fan, the indoor unit of the air conditioner is located in the electrical equipment room, and the outdoor unit of the air conditioner and the first exhaust fan are located in the air heat exchange chamber.

[0011] Furthermore, the fresh air device includes an air intake hood that opens at a certain angle toward the tunnel side.

[0012] Furthermore, the fresh air device is also equipped with a filter, which is located inside the air intake hood and is supported and fixed by a detachable mesh baffle.

[0013] Furthermore, the suction hood is configured in a wedge shape.

[0014] Furthermore, the air heat exchange chamber is also equipped with an intelligent control integrated door, a wind pressure difference control module, and a toxic gas monitoring module. The wind pressure difference control module is used to monitor the flow pressure of the fresh air device, and the toxic gas monitoring module is used to monitor air quality data.

[0015] The temperature control module, the wind pressure difference control module, the toxic gas monitoring module, and the fresh air device are installed on the intelligent control integrated door.

[0016] To address the aforementioned technical problems, the present invention also provides a method for controlling fresh air in a tunnel power distribution room, comprising the following steps:

[0017] S1. The temperature control module monitors the ambient temperature of the power distribution room and compares the ambient temperature with the set temperature;

[0018] S2. The temperature control module transmits temperature comparison information to the control module;

[0019] S3. The control module starts the first exhaust module or the second exhaust module according to the temperature comparison information, and the first exhaust module or the second exhaust module exhausts the hot air in the power distribution room;

[0020] S4. The fresh air unit introduces air from the tunnel side into the tunnel to generate fresh air and regulate the temperature of the power distribution room;

[0021] Specifically, the first exhaust module is activated when the ambient temperature is higher than the set temperature, and the second exhaust module is activated when the ambient temperature is lower than the set temperature.

[0022] Specifically, the power distribution room includes an electrical equipment room and an air heat exchange room and an air purification room respectively located on both sides of the electrical equipment room, and the fresh air device is located in the air heat exchange room;

[0023] Step S3 specifically involves:

[0024] When the ambient temperature is higher than the set temperature of the temperature control module: the control module activates the first exhaust module located in the air heat exchange chamber and the electrical equipment room to exhaust the hot air in the electrical equipment room to the air heat exchange chamber; then, the hot air in the air heat exchange chamber is discharged unidirectionally by the first exhaust module; at this time, the electrical equipment room and the air purification room are not connected.

[0025] When the ambient temperature is lower than the set temperature of the temperature control module: the control module activates the second exhaust module installed in the air purification room to directly exhaust the hot air from the electrical equipment room in one direction; at this time, the electrical equipment room, the air heat exchange room and the air purification room are in a connected state.

[0026] Preferably, the temperature control module and the control module are located in the air heat exchange chamber; the first exhaust module includes an air conditioner and a first exhaust fan, the indoor unit of the air conditioner is located in the electrical equipment room, and the outdoor unit of the air conditioner and the first exhaust fan are located in the air heat exchange chamber;

[0027] When the ambient temperature is higher than the set temperature of the temperature control module: the control module starts the air conditioner, and the air conditioner discharges the hot air into the air heat exchange chamber; then the first exhaust fan discharges the hot air from the air heat exchange chamber in one direction.

[0028] To address the aforementioned technical problems, the present invention also provides a fresh air system for a tunnel power distribution room. The system includes a fresh air device, a temperature control module, a control module, a first exhaust module, and a second exhaust module. The temperature control module, the first exhaust module, and the second exhaust module are respectively connected to the control module. The temperature control module has a set temperature and is used to monitor the ambient temperature of the power distribution room. The control module activates the first exhaust module or the second exhaust module based on the temperature information from the temperature control module.

[0029] The control module activates the first exhaust module when the ambient temperature is higher than the set temperature, and activates the second exhaust module when the ambient temperature is lower than the set temperature; the fresh air device introduces air from the tunnel side to generate fresh air and regulate the temperature of the power distribution room.

[0030] Specifically, the power distribution room includes an electrical equipment room and an air heat exchange room and an air purification room respectively located on both sides of the electrical equipment room; the fresh air device is located in the air heat exchange room, the first exhaust module is located in the electrical equipment room and the air heat exchange room, and the second exhaust module is located in the air purification room;

[0031] When the first exhaust module is activated, the electrical equipment room and the air purification room are not connected; when the second exhaust module is activated, the electrical equipment room, the air heat exchange room, and the air purification room are connected.

[0032] Preferably, the temperature control module and the control module are located in the air heat exchange chamber, the first exhaust module includes an air conditioner and a first exhaust fan, the indoor unit of the air conditioner is located in the electrical equipment room, and the outdoor unit of the air conditioner and the first exhaust fan are located in the air heat exchange chamber.

[0033] The technical solution claimed in this invention has the following beneficial effects:

[0034] 1) The power distribution room in the middle of the tunnel is divided into three areas by the wall. The electrical equipment workshop is located in the middle of the power distribution room, and the air heat exchange room and air purification room are set at both ends respectively. This prevents the equipment workshop from being connected to the tunnels on both sides, effectively preventing the intrusion of the mixed air, dust and moisture in the tunnel, and providing effective protection for the electrical equipment in the equipment workshop, reducing maintenance difficulty and cost.

[0035] 2) This fresh air system can adopt two operating modes: an energy-saving operating mode in which the entire power distribution room is connected when the temperature is low, and an independent self-circulation operating mode when the temperature is high. Different operating modes can be selected according to the temperature of different seasons to cool down the equipment room of the power distribution room, effectively saving power resources. Attached Figure Description

[0036] Figure 1 A top view of the fresh air system in the tunnel's power distribution room;

[0037] Figure 2 A side view of the tunnel power distribution room's fresh air system as seen from the direction of the air heat exchange chamber;

[0038] Figure 3 Side view of the intelligent control integrated door;

[0039] Figure 4 for Figure 3 Enlarged view of section I (fresh air inlet);

[0040] Figure 5 This is a module diagram of the fresh air system in the tunnel power distribution room.

[0041] Attached reference numerals: 1. Electrical equipment room; 2. Air heat exchange room; 3. Air purification room; 4. First fire door; 5. Second fire door; 6. Third fire door; 7. Intelligent control integrated door; 7-1. Temperature control module; 7-2. Air pressure differential control module; 7-3. Toxic gas monitoring module; 7-4. Air intake hood; 7-5. Filter; 7-6. Mesh baffle; 8. Air conditioner outdoor unit; 9. Air conditioner indoor unit; 10. Power distribution equipment; 11. Power supply equipment; 12. Second exhaust fan; 13. First exhaust fan; 14. Control module; 15. FFU air purifier. Detailed Implementation

[0042] The technical solutions claimed in this invention will be further described clearly below with reference to the accompanying drawings and specific embodiments. Example 1

[0043] like Figure 1-5 As shown, the tunnel power distribution room provided in this embodiment is first divided into three rooms by a wall in the middle of the tunnel, including an electrical equipment room 1 and an air heat exchange room 2 and an air purification room 3 respectively located on both sides of the electrical equipment room 1. The air heat exchange room 2 is equipped with a fresh air device on the side adjacent to the tunnel. The fresh air device is used to introduce air from inside the tunnel to generate fresh air and regulate the temperature of the power distribution room. The electrical equipment room is equipped with power distribution equipment 10 and power supply equipment 11. Each room is connected by an inspection door. In addition, there is a third fire door 6 between the electrical equipment room 1 and the air heat exchange room 2, a second fire door 5 between the electrical equipment room 1 and the air purification room 3, and a first fire door 4 in the air purification room.

[0044] The tunnel power distribution room is equipped with a first exhaust module that can be used when the ambient temperature is higher than the set temperature, a second exhaust module that can be used when the ambient temperature is lower than the set temperature, a temperature control module 7-1 for monitoring the ambient temperature, and a control module 14. The control module 14 activates the first exhaust module or the second exhaust module according to the temperature set by the temperature control module 7-1 and the monitored ambient temperature.

[0045] Specifically, the temperature control module 7-1 and the control module 14 for monitoring ambient temperature are located in the air heat exchange chamber 2. The air heat exchange chamber 2 is also equipped with a wind pressure difference control module 7-2 and a toxic gas monitoring module 7-3. The wind pressure difference control module 7-2 is used to monitor the flow rate pressure of the fresh air device, and the toxic gas monitoring module 7-3 is used to monitor air quality data.

[0046] More specifically, the air heat exchange chamber 2 is equipped with a smart control integrated door 7 made of 304 stainless steel. The upper half of the smart control integrated door 7 is equipped with the temperature control module 7-1, the wind pressure difference control module 7-2, and the toxic gas monitoring module 7-3. The lower half of the smart control integrated door 7 is equipped with the fresh air device. The control module 14 of the fan electrical system is installed on the right side inside the smart control integrated door 7.

[0047] The second exhaust module includes a second exhaust fan 12 installed in the air purification room 3. The second exhaust fan can be a second explosion-proof louvered fan, installed in an exhaust vent located on the upper part of the right-side wall of the air purification room 3. The first exhaust module includes an air conditioner and a first exhaust fan 13. The indoor air conditioner unit 9 is installed in the electrical equipment room 1, and the outdoor air conditioner unit 8 and the first exhaust fan 13 are installed in the air heat exchange room 2. The first exhaust fan can be a first explosion-proof louvered fan, installed in an exhaust vent located on the upper part of the intelligent control integrated door 7.

[0048] The fresh air device includes a wedge-shaped air intake hood 7-4 that opens at a certain angle towards the tunnel side. Furthermore, the fresh air module also includes a filter 7-5, which is located inside the air intake hood 7-4 and may contain an activated carbon filter or a cotton filter. The filter 7-5 is supported and fixed by a removable mesh baffle 7-6. The air purification chamber 3 is equipped with an FFU (Fan Filter Unit) air purifier 15.

[0049] The fresh air control method for the power distribution room in this embodiment includes the following steps:

[0050] S1. Temperature control module 7-1 monitors the ambient temperature of the power distribution room and compares the ambient temperature with the set temperature;

[0051] S2. The temperature control module 7-1 transmits the temperature comparison information to the contactor of the control module 14;

[0052] S3. The control module 14 starts the first exhaust module or the second exhaust module according to the temperature comparison information, and the first exhaust module or the second exhaust module exhausts the hot air in the power distribution room.

[0053] S4. The fresh air unit introduces air from the tunnel side into the tunnel to generate fresh air and regulate the temperature of the power distribution room;

[0054] Specifically, the first exhaust module is activated when the ambient temperature is higher than the set temperature, and the second exhaust module is activated when the ambient temperature is lower than the set temperature.

[0055] Specifically, step S3 is as follows:

[0056] When the ambient temperature is higher than the set temperature of the temperature control module 7-1: the control module 14 activates the first exhaust module located in the air heat exchange chamber 2 and the electrical equipment room 1 to exhaust the hot air in the electrical equipment room 1 to the air heat exchange chamber 2; then, the hot air in the air heat exchange chamber 2 is discharged unidirectionally by the first exhaust module; at this time, the electrical equipment room 1 and the air purification room 3 are not connected.

[0057] When the ambient temperature is lower than the set temperature of the temperature control module 7-1: the control module 14 starts the second exhaust module set in the air purification room to directly exhaust the hot air of the electrical equipment room 1 in one direction; at this time, the electrical equipment room 1, the air heat exchange room 2 and the air purification room 3 are in a connected state.

[0058] More specifically, when the ambient temperature is higher than the set temperature of the temperature control module 7-1: the control module 14 starts the air conditioner and exhausts the hot air to the air heat exchange chamber 2 through the air conditioner; then the hot air in the air heat exchange chamber 2 is exhausted in one direction by the first exhaust fan 13.

[0059] In cases where the ambient temperature is high (such as in summer), the power distribution room provided in this embodiment adopts an independent self-circulation operation mode fresh air control method. The more detailed working process is as follows:

[0060] The airtight second fire door 5 and third fire door 6 installed on both sides of the electrical equipment room 1 are normally closed to keep the equipment room in a sealed state. The heat from the low-pressure side is continuously absorbed into the refrigerant through the indoor air conditioning unit 9 and then sent to the outdoor air conditioning unit 8 in the high-pressure side, dissipating the heat into the air in the air heat exchange chamber 2, thereby regulating the temperature.

[0061] The air temperature inside the air heat exchange chamber 2 is regulated by a fresh air module with a filter at the bottom of the intelligent control integrated door 7. Since this door is located outside the power distribution room and directly connected to the tunnel, and considering the frequent rinsing and cleaning of the tunnel wall tiles during tunnel maintenance, the door is made of SUS304 stainless steel for corrosion resistance and easy cleaning. The filter's air inlet is designed as a wedge-shaped suction hood 7-4, preventing dust accumulation on the outside of the hood and protecting against water splashes during tunnel wall cleaning. This prevents water from combining with dust adhering to the filter element and clogging the filter. Because the door opens outwards at a certain angle, dust will not fall into the room during filter replacement. A quick-release and removable mesh baffle 7-6 installed inside the filter helps to secure the filter element.

[0062] The fresh air module draws in air from the tunnel, filters it to produce fresh air, and the temperature difference between the air introduced from the tunnel and the hot air in the air heat exchange chamber creates airflow. Since the temperature of the air in the air heat exchange chamber 2 is only regulated, the requirement for fresh air is not high. Considering operating costs, a cotton filter element can be selected. The intelligent temperature control module at the top of the intelligent integrated door 7, made of 304 stainless steel, constantly monitors the room temperature. Based on the set temperature signal, it feeds back the monitored temperature to the control module 14 of the fan electrical system. Then, the hot air is discharged in one direction through the first exhaust fan 13 with explosion-proof louvers installed in the irreversible exhaust vent at the top of the air heat exchange chamber 2, preventing gas backflow.

[0063] The air pressure differential control module 7-2 at the top of the intelligent control integrated door 7 reflects the airflow and pressure of the fresh air system, thereby determining the degree of filter clogging and providing accurate data for filter maintenance, cleaning, or replacement. The toxic gas monitoring module 7-3 at the top of the intelligent control integrated door 7 monitors air quality data in the sealed electrical equipment room. This instrument can directly display values ​​on-site or upload data collected on-site to the central control room via a 485 port. Its main function is to protect equipment and prevent personnel from poisoning and suffocation, thus enhancing personnel safety.

[0064] Among them, the three instruments installed on the upper part of the intelligent control integrated door 7 are covered by a flip-top sealed acrylic glass cover. This transparent acrylic glass cover allows a clear view of the instrument's database and can be easily opened for numerical adjustments and settings. It also has waterproof and dustproof functions to protect the instruments from damage.

[0065] Due to the daily inspection requirements of electrical equipment, maintenance personnel are assigned to inspect the power distribution room every day. Personnel primarily enter and exit through the air purification room 3 on the other side of the central electrical power distribution room. The power distribution room is mainly separated from the tunnel by a second fire door 5 and a third fire door 6, preventing air circulation between the equipment room and the tunnel. First, maintenance personnel open the first fire door 4 to enter the air purification room. After the first fire door 4 is closed, mixed air and dust entering from the tunnel are purified by the FFU air purifier 15 installed in the air purification room. Then, the personnel open the inner second fire door 5 to enter the electrical equipment room. This prevents the mixed air and dust from the tunnel from being directly brought into the electrical equipment room, effectively protecting the internal equipment. Example 2

[0066] The tunnel power distribution room, the fresh air control method for the tunnel power distribution room, and the fresh air system setup in this embodiment are the same as in Embodiment 1.

[0067] Specifically, when the ambient temperature is low in the operating section, the tunnel power distribution room adopts an energy-saving fresh air control method with overall continuous operation. The specific working principle of the fresh air system at this time is as follows:

[0068] When the ambient temperature detected by the temperature control module 7-1 is lower than the set temperature: the control module 14 starts the second exhaust module. At this time, the electrical equipment room 1, the air heat exchange room 2 and the air purification room 3 are in a connected state; the airflow is generated by the temperature difference between the air and the hot air in the tunnel, and the hot air in the electrical equipment room 1 is directly discharged in one direction by the "gravity" of the second exhaust fan 12.

[0069] The more detailed work process is as follows:

[0070] First, shut down the air conditioning system and the exhaust fan of air heat exchange room 2. Open the second fire doors 5 and third fire doors 6 at both ends of the electrical equipment room, ensuring a continuous flow between electrical equipment room 1, air heat exchange room 2, and air purification room 3. The fresh air processed by the filter 7-5 at the bottom of the intelligent control door 7 in the air heat exchange room is fed back to the contactor of the control module 14 based on the set temperature by the intelligent temperature control module 7-1 at the top of the intelligent control door 7. This activates the second exhaust fan 12 (louvered explosion-proof type) at the top of the air purification room 3 on the other side of electrical equipment room 1, expelling the hot air and creating a unidirectional airflow in electrical equipment room 1. Fresh air is drawn from one tunnel, while hot air is expelled from the other tunnel, preventing gas backflow. The circulating clean fresh air regulates the temperature of the electrical equipment room within the power distribution room, achieving cooling and dust prevention, thus ensuring the normal operation of the internal equipment. Since the equipment in the equipment room has high requirements for fresh air, standard-specification activated carbon filter elements can be selected for the filter core to ensure the quality of the fresh air.

[0071] The embodiments described above are merely exemplary solutions of the present invention and are not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A tunnel power distribution house characterized by, The power distribution room comprises an electrical equipment room (1) and air heat exchange chambers (2) and air purification chambers (3) respectively arranged on both sides of the electrical equipment room (1), the air heat exchange chambers (2) and the air purification chambers (3) are respectively adjacent to the main line of the tunnel, the air heat exchange chambers (2) are provided with fresh air devices on the side adjacent to the tunnel, and the fresh air devices are used to introduce air in the tunnel from the side of the tunnel. The tunnel power distribution room is provided with a first exhaust module that can be started when the ambient temperature is higher than the set temperature, a second exhaust module that can be started when the ambient temperature is lower than the set temperature, a temperature control module (7-1) for monitoring the ambient temperature, and a control module (14), the control module (14) starts the first exhaust module or the second exhaust module according to the temperature set by the temperature control module (7-1) and the monitored ambient temperature. The first exhaust module is arranged in the electrical equipment room (1) and the air heat exchange chamber (2), and the second exhaust module is arranged in the air purification chamber (3). When the ambient temperature is higher than the set temperature of the temperature control module (7-1): the control module (14) starts the first exhaust module arranged in the air heat exchange chamber (2) and the electrical equipment room (1) to exhaust the hot air in the electrical equipment room (1) to the air heat exchange chamber (2); then the hot air in the air heat exchange chamber (2) is unidirectionally exhausted by the first exhaust module; at this time, the electrical equipment room (1) and the air purification chamber (3) are not connected. When the ambient temperature is lower than the set temperature of the temperature control module (7-1): the control module (14) starts the second exhaust module arranged in the air purification chamber, directly unidirectionally exhausts the hot air in the electrical equipment room (1) to the side of the main line of the tunnel adjacent to the air purification chamber; at this time, the electrical equipment room (1), the air heat exchange chamber (2) and the air purification chamber (3) are in a connected state. The first exhaust module comprises an air conditioner and a first exhaust fan, the indoor unit (9) of the air conditioner is arranged in the electrical equipment room (1), and the outdoor unit (8) of the air conditioner and the first exhaust fan are arranged in the air heat exchange chamber (2).

2. The tunneling power house of claim 1, wherein, The temperature control module (7-1) and the control module (14) are arranged in the air heat exchange chamber (2).

3. The tunneling power house of claim 1, wherein, The fresh air device comprises a suction hood (7-4) that is opened at a certain angle towards the tunnel side.

4. The tunneling power house of claim 3, wherein, The fresh air device is also provided with a filter (7-5), the filter (7-5) is arranged on the inner side of the suction hood (7-4), and the filter (7-5) is supported and fixed by a detachable grid baffle (7-6).

5. The tunneling power house according to claim 3 or 4, characterized in that The suction hood (7-4) is arranged in a wedge shape.

6. The tunneling power house of claim 1, wherein, The air heat exchange chamber (2) is also provided with an intelligent control comprehensive door (7), a wind pressure difference control module (7-2) and a toxic gas monitoring module (7-3), the wind pressure difference control module (7-2) is used to monitor the flow pressure difference of the fresh air device, and the toxic gas monitoring module (7-3) is used to monitor air quality data. The temperature control module (7-1), the wind pressure difference control module (7-2), the toxic gas monitoring module (7-3) and the fresh air device are arranged on the intelligent control comprehensive door (7).

7. A fresh air control method for a tunnel power distribution room, characterized by, The method comprises the following steps: S1. The temperature control module (7-1) monitors the ambient temperature of the power distribution room and compares the ambient temperature with a set temperature; S2. The temperature control module (7-1) transmits temperature comparison information to the control module (14); S3. The control module (14) starts the first exhaust module or the second exhaust module according to the temperature comparison information, and the first exhaust module or the second exhaust module exhausts hot air in the power distribution room; S4. The fresh air device introduces air from the tunnel side into the tunnel to generate fresh air and adjust the temperature of the power distribution room; Wherein, when the ambient temperature is higher than the set temperature, the first exhaust module is started, and when the ambient temperature is lower than the set temperature, the second exhaust module is started; The power distribution room comprises an electrical equipment room (1) and air heat exchange chambers (2) and air purification chambers (3) respectively arranged on both sides of the electrical equipment room (1), the air heat exchange chambers (2) and the air purification chambers (3) are respectively adjacent to the main line of the tunnel, and the fresh air device is arranged in the air heat exchange chamber (2); The step S3 is specifically: When the ambient temperature is higher than the set temperature of the temperature control module (7-1): the control module (14) starts the first exhaust module arranged in the air heat exchange chamber (2) and the electrical equipment room (1) to exhaust the hot air in the electrical equipment room (1) to the air heat exchange chamber (2); then the hot air in the air heat exchange chamber (2) is unidirectionally exhausted by means of the first exhaust module; at this time, the electrical equipment room (1) and the air purification chamber (3) are not connected; When the ambient temperature is lower than the set temperature of the temperature control module (7-1): the control module (14) starts the second exhaust module arranged in the air purification chamber to unidirectionally exhaust the hot air in the electrical equipment room (1) towards the side of the main line of the tunnel adjacent to the air purification chamber; at this time, the electrical equipment room (1), the air heat exchange chamber (2) and the air purification chamber (3) are in a connected state; The first exhaust module comprises an air conditioner and a first exhaust fan, the indoor unit (9) of the air conditioner is arranged in the electrical equipment room (1), and the outdoor unit (8) of the air conditioner and the first exhaust fan are arranged in the air heat exchange chamber (2).

8. The control method according to claim 7, characterized by, The temperature control module (7-1) and the control module (14) are arranged in the air heat exchange chamber (2); When the ambient temperature is higher than the set temperature of the temperature control module (7-1): the control module (14) starts the air conditioner to exhaust the hot air to the air heat exchange chamber (2) by means of the air conditioner; then the hot air in the air heat exchange chamber (2) is unidirectionally exhausted by means of the first exhaust fan.

9. A fresh air system for a tunnel power distribution room, characterized in that The system comprises a fresh air device, a temperature control module (7-1), a control module (14), a first exhaust module and a second exhaust module; the temperature control module (7-1), the first exhaust module and the second exhaust module are respectively connected with the control module (14); the temperature control module (7-1) has a set temperature and is used for monitoring the ambient temperature of the power distribution room, and the control module (14) starts the first exhaust module or the second exhaust module according to the temperature information of the temperature control module (7-1); The control module (14) starts the first exhaust module when the ambient temperature is higher than the set temperature, and starts the second exhaust module when the ambient temperature is lower than the set temperature; the fresh air device introduces air from the tunnel side into the tunnel, generates fresh air, and adjusts the temperature of the power distribution room; The power distribution room comprises an electrical equipment room (1) and air heat exchange chambers (2) and air purification chambers (3) arranged on both sides of the electrical equipment room (1), respectively; the air heat exchange chambers (2) and the air purification chambers (3) are adjacent to the main line of the tunnel, respectively; the fresh air device is arranged in the air heat exchange chamber (2), the first exhaust module is arranged in the electrical equipment room (1) and the air heat exchange chamber (2), and the second exhaust module is arranged in the air purification chamber (3). The electrical equipment room (1) and the air purification chamber (3) are not connected when the first exhaust module is started, and the electrical equipment room (1), the air heat exchange chamber (2) and the air purification chamber (3) are in a connected state when the second exhaust module is started; the first exhaust module comprises an air conditioner and a first exhaust fan, the indoor unit (9) of the air conditioner is arranged in the electrical equipment room (1), and the outdoor unit (8) of the air conditioner and the first exhaust fan are arranged in the air heat exchange chamber (2).

10. The fresh air system of claim 9, wherein, The temperature control module (7-1) and the control module (14) are arranged in the air heat exchange chamber (2).

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