Novel large air-conditioning system applied to subway station

Abstract

The invention provides a novel large air conditioning system applied to a subway station. The system comprises an exhaust shaft, a fresh air shaft, an air mixing chamber, a combined air conditioning unit, a main air supply pipe, a station hall first air supply branch pipe, a station hall second air supply branch pipe, an air return plenum chamber, a station hall exhaust pipe, a platform first air supply branch pipe and a platform second air supply branch pipe. According to the system, the platform first air supply branch pipe and the platform second air supply branch pipe are arranged in the platform public area, so that air supply of the platform public area is uniform, the situation that cold and heat of the platform public area are not uniform is avoided, and the comfort degree of the indoor environment of the platform is improved. On the basis of uniform air supply of the system, the system only adopts one station hall exhaust pipe to uniformly exhaust air or smoke in the platform public area and the station hall public area, so that the occupied space of pipeline design is reduced, and the difficulty of comprehensive pipeline arrangement and the difficulty of electromechanical construction are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of subway air-conditioning systems, and in particular relates to a new large air-conditioning system applied to subway stations. Background Art

[0002] The ventilation and air conditioning system, as an important temperature control and ventilation system for underground stations, accounts for about 40% to 50% of the total energy consumption of the station during operation, and its supporting equipment occupies 50% of the area of ​​the station equipment management room. Therefore, it is of great significance to adopt a reasonable ventilation and air conditioning system design under the premise of ensuring indoor comfort, so as to minimize the civil construction investment and operating energy consumption of underground stations.

[0003] The existing station ventilation and air conditioning system serves the public areas of the station hall and the platform. Two air supply ducts and two return exhaust ducts are set for the public area of ​​the station hall, while only one air supply duct and one return exhaust duct are set for the public area of ​​the platform. This design takes up a lot of space and is difficult to lay out the integrated pipelines. Due to the special civil engineering conditions of the subway station, it is impossible to set up two air supply ducts and two return exhaust ducts in the public area of ​​the platform. If only one air supply duct and one return exhaust duct are set up in the public area of ​​the platform, one side of the public area of ​​the platform will be colder and the other side will be hotter, and the air supply will be uneven, which cannot ensure the indoor comfort of the underground station. Summary of the invention

[0004] The present invention provides a novel large air-conditioning system applied to a subway station, which is used to solve the problems existing in the prior art.

[0005] A new large air conditioning system applied to a subway station reduces the number of return and exhaust ducts in the public area of ​​the station hall and removes the number of return and exhaust ducts in the public area of ​​the platform, and includes an exhaust shaft, a fresh air shaft, an air mixing chamber, a combined air conditioning unit, a main air supply duct, a first air supply branch duct in the station hall, a second air supply branch duct in the station hall, a return air static pressure box, a station hall exhaust duct, a first air supply branch duct in the platform, and a second air supply branch duct in the platform;

[0006] Among them, the fresh air outlet of the fresh air shaft is connected to the fresh air inlet of the air mixing chamber through the valve body, the air outlet of the air mixing chamber is connected to the air inlet of the combined air conditioning unit, and the air outlet of the combined air conditioning unit is connected to the first air supply branch pipe of the station hall, the second air supply branch pipe of the station hall, the first air supply branch pipe of the platform and the second air supply branch pipe of the platform through the valve body; the first air supply branch pipe of the station hall and the second air supply branch pipe of the station hall are arranged in the public area of ​​the station hall, and the air outlets of the first air supply branch pipe of the station hall and the second air supply branch pipe of the station hall are spaced apart from each other and are located in the public area of ​​the station hall; the first air supply branch pipe of the platform and the second air supply branch pipe of the platform are arranged in the public area of ​​the platform, and the air outlets of the first air supply branch pipe of the platform and the second air supply branch pipe of the platform are spaced apart from each other and are located in the public area of ​​the platform;

[0007] There is only one station hall exhaust duct in the station hall public area. It is located in the station hall public area and close to the platform public area. No exhaust duct is installed in the platform public area. The air inlet of the station hall exhaust duct is located in the station hall public area. The air outlet of the station hall exhaust duct is connected to the air inlet of the return air static pressure box through the valve body; the return air static pressure box is connected to the exhaust shaft through the valve body and the fan.

[0008] Through the above technical solution, the system of the present invention sets the first platform air supply branch pipe and the second platform air supply branch pipe in the platform public area, so that the air supply in the platform public area is uniform, avoiding the uneven cold and hot conditions in the platform public area, and improving the comfort of the platform indoor environment. On the basis of the uniform air supply of the above system, the system of the present invention only uses one station hall exhaust pipe to uniformly exhaust air or smoke from the platform public area and the station hall public area, so as to reduce the space occupied by the pipeline design, and also reduce the difficulty of comprehensive pipeline layout and the difficulty of electromechanical construction.

[0009] Preferably, it also includes a fresh air duct, a first electric air valve, a second electric air valve and a fresh air fan; the air mixing chamber is provided with a first fresh air inlet and a second fresh air inlet; the main channel of the fresh air duct is connected to the fresh air shaft; the first branch of the fresh air duct is connected to the air inlet of the first electric air valve, and the air outlet of the first electric air valve is connected to the first fresh air inlet; the second branch of the fresh air duct is connected to the air inlet of the second electric air valve, and the air outlet of the second electric air valve is connected to the second fresh air inlet through the fresh air fan.

[0010] Preferably, it also includes a main air supply duct, a station hall air supply duct, a platform air supply duct, a third electric air valve for opening and closing the air supply channel of the main air supply duct, a fourth electric air valve for opening and closing the air supply channel of the station hall air supply duct and a fifth electric air valve for opening and closing the air supply channel of the platform air supply duct; the air inlet of the main air supply duct is connected to the air outlet of the combined air-conditioning unit, the third electric air valve is arranged at the first section of the main air supply duct, and the air outlet of the main air supply duct is connected to the station hall air supply duct and the platform air supply duct; the first air supply branch pipe in the station hall and the second air supply branch pipe in the station hall serve as two-way air outlet branches of the station hall air supply duct; the fourth electric air valve is arranged on the air supply main road of the station hall air supply duct; the first air supply branch pipe and the second air supply branch pipe on the platform serve as two-way air outlet branches of the platform air supply duct; the fifth electric air valve is arranged on the air supply main road of the platform air supply duct.

[0011] Preferably, it also includes a first muffler and a second muffler, the first muffler is arranged on the connecting main road between the exhaust shaft and the return air static pressure box; the second muffler is arranged on the connecting main road between the fresh air shaft and the mixing chamber.

[0012] Preferably, it also includes an exhaust duct, a return-exhaust air duct, a return air duct, a return-exhaust fan, a sixth electric air valve, an eighth electric air valve and a tenth electric air valve; the air outlet of the exhaust duct is connected to the inlet of the exhaust duct through the sixth electric air valve, and the outlet of the exhaust duct is connected to the exhaust shaft; the first air inlet of the exhaust duct is connected to the air outlet of the return-exhaust fan, and the air inlet of the return-exhaust fan is connected to the air outlet of the return air static pressure box through the eighth electric air valve; one end of the return air duct is connected to the exhaust duct, and the other end is connected to the mixing chamber through the tenth electric air valve.

[0013] Preferably, it also includes a smoke exhaust pipe, a smoke exhaust fan and a seventh electric air valve, the smoke outlet of the smoke exhaust pipe is connected to the entrance of the exhaust duct, the smoke inlet of the smoke exhaust pipe is connected to the smoke outlet of the smoke exhaust fan, and the smoke inlet of the smoke exhaust fan is connected to the smoke outlet of the return air static pressure box through the seventh electric air valve.

[0014] Preferably, it also includes a third muffler, which is arranged on the connecting pipeline between the eighth electric air valve and the wind static pressure box.

[0015] Preferably, it also includes a plurality of fire dampers, which are arranged on the connecting pipeline between the return air static pressure box and the exhaust shaft.

[0016] Preferably, a first manual air valve is provided on the first air supply branch pipe in the station hall; a second manual air valve is provided on the second air supply branch pipe in the station hall; a third manual air valve is provided on the first air supply branch pipe on the platform; and a fourth manual air valve is provided on the second air supply branch pipe on the platform.

[0017] The present invention also provides a new large air conditioning system control method for a subway station, which is used for the operating mode conversion of the new large air conditioning system described in any of the above paragraphs. The method of the present invention comprises:

[0018] S10: obtaining outdoor fresh air enthalpy value, indoor return air enthalpy value and air conditioning supply air enthalpy value in real time;

[0019] S20: If the outdoor fresh air enthalpy value is greater than the indoor return air enthalpy value, executing the first double-supply double-exhaust mode;

[0020] If the outdoor fresh air enthalpy value is greater than the air conditioning supply air enthalpy value and less than or equal to the indoor return air enthalpy value, the second double-supply and double-exhaust mode or the first supply-only mode is executed;

[0021] If the outdoor fresh air enthalpy value is less than or equal to the air conditioning supply air enthalpy value, the third double-supply and double-exhaust mode or the second supply-only mode is executed.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] 1) Compared with the prior art, the system of the present invention reduces the number of return and exhaust ducts in the public area of ​​the station hall, and also eliminates the number of return and exhaust ducts in the public area of ​​the platform. Only one station hall exhaust duct in the public area of ​​the station hall can ensure the uniformity of the platform air supply and effectively reduce the energy consumption of the subway air-conditioning system.

[0024] 2) Compared with the prior art, the system of the present invention uses only one station hall exhaust duct to uniformly exhaust air or smoke from the platform public area and the station hall public area, so as to reduce the space occupied by the pipeline design, and also alleviate the difficulty of comprehensive pipeline layout and mechanical and electrical construction.

[0025] 3) Compared with the prior art, the method of the present invention can automatically adjust the working conditions of the system of the present invention according to the actual conditions of the outdoor fresh air enthalpy value, the indoor return air enthalpy value and the air conditioning supply air enthalpy value, provide the uniformity of the system's own air supply, and reduce the air supply energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of a new large air-conditioning system used in a subway station in the first embodiment of the present invention.

[0028] Figure numerals: 1, exhaust shaft; 2, fresh air shaft; 3a, first muffler; 3b, second muffler; 3c, third muffler; 4, exhaust duct; 5, fresh air duct; 6, first electric air valve; 7, new air duct; 8, second electric air valve; 9, small fresh air duct; 10, fresh air fan; 11, mixing chamber; 12, combined air conditioning unit; 13, main air supply duct; 14, third electric air valve; 15a, first fire damper; 15b, second fire damper; 15c, third fire damper; 15d, fourth fire damper; 15e, fifth fire damper; 15f, sixth fire damper; 15g, seventh fire damper; 15h, eighth fire damper; 16, station hall air supply duct; 17, fourth electric air valve; 18a, first manual air valve; 18b, second manual air valve; 18c, third manual air valve; 18d, The fourth manual air valve; 19. The first air supply branch of the station hall; 20. The second air supply branch of the station hall; 21. The air outlet; 22. The platform air supply duct; 23. The fifth electric air valve; 24. The first air supply branch of the platform; 25. The second air supply branch of the platform; 26. The sixth electric air valve; 27. The return and exhaust air duct; 28. The tenth electric air valve; 29. ​​The return air duct; 30. The return and exhaust fan; 31. The eighth electric air valve; 32. The main return and exhaust air duct; 33. The return air static pressure box; 34. The smoke exhaust conversion air duct; 35. The eleventh electric air valve; 36. The station hall exhaust duct; 37. The ninth electric air valve; 38. The smoke exhaust duct; 39. The smoke exhaust fan; 40. The seventh electric air valve; 41. The environmental control room; 42. The equipment area; 43. The public area of ​​the station hall; 44. The public area of ​​the platform; 45. The electric two-way valve; 46. The chilled water pipe. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] This embodiment discloses a new large air-conditioning system applied to a subway station, which is used to solve the problems existing in the prior art.

[0032] Embodiment 1

[0033] like Figure 1 As shown, this embodiment discloses a new large air conditioning system applied to subway stations, which includes an exhaust shaft 1, a fresh air shaft 2, an air mixing chamber 11, a combined air conditioning unit 12, a main air supply duct 13, a first air supply branch 19 in the station hall, a second air supply branch 20 in the station hall, a return air static pressure box 33, a station hall exhaust duct 36, a first air supply branch 24 on the platform, and a second air supply branch 25 on the platform.

[0034] In this embodiment, the air mixing chamber 11, the modular air conditioning unit 12, the return air plenum box 33 and the main air supply duct 13 are arranged in the environmental control room 41. The air mixing chamber 11 is used to improve the quality of the air sent into the modular air conditioning unit 12. The modular air conditioning unit 12 is also called an air handling device, which has functions such as heating, cooling, dehumidification, and humidification. The return air plenum box 33 is used to balance the pressure of each room, recycle and reuse fresh air, reduce noise, evenly distribute the air volume and simplify the system structure.

[0035] Among them, the fresh air outlet of the fresh air shaft 2 is connected to the fresh air inlet of the air mixing chamber 11 through the valve body, the air outlet of the air mixing chamber 11 is connected to the air inlet of the combined air conditioning unit 12, and the air outlet of the combined air conditioning unit 12 is connected to the first air supply branch pipe 19 of the station hall, the second air supply branch pipe 20 of the station hall, the first air supply branch pipe 24 of the platform, and the second air supply branch pipe 25 of the platform through the valve body. The air outlet of the station hall exhaust duct 36 is connected to the air inlet of the return air static pressure box 33 through the valve body, and the return air static pressure box 33 is connected to the exhaust shaft 1 through the valve body and the fan.

[0036] Different from the conventional design, in this embodiment, the first air supply branch pipe 19 and the second air supply branch pipe 20 of the station hall are arranged in the public area 43 of the station hall, and the air outlets of the two station hall branches are spaced apart from each other and located in the public area 43 of the station hall. The first air supply branch pipe 24 and the second air supply branch pipe 25 of the platform are arranged in the public area 44 of the platform, and the air outlets of the two platform branches are spaced apart from each other and located in the public area 44 of the platform. As for the station hall exhaust duct 36, it is arranged in the public area 43 of the station hall and close to the public area 44 of the platform, and its air inlet is located in the public area 43 of the station hall.

[0037] It needs to be additionally explained that, in underground stations, the station hall public area 43 (the hall where the card swiping gate is located) is often located on the upper level of the platform public area 44 (the train stop hall). Warm air has a lower density than cold air. Therefore, in order to discharge warm air in a timely manner with the lowest energy consumption, the present invention only provides one station hall exhaust duct 36 in the station hall public area 43 located on the upper level.

[0038] Through the above-mentioned five-branch pipe design, the system of the present invention eliminates the need for exhaust ducts in the public area 43 of the station hall, and also eliminates the need for exhaust ducts in the public area. By simply adding air supply ducts in the public area 44 of the platform, the uniformity of platform air supply is ensured, the platform area is evenly cooled and heated, and the energy consumption of the subway air-conditioning system can be effectively reduced.

[0039] Furthermore, in order to improve the controllability of the system of the present invention at the level of fresh air intake, the system of the present invention also includes a fresh air duct 5, a first electric air valve 6 and a second electric air valve 8.

[0040] Specifically, the air mixing chamber 11 is provided with a first fresh air inlet and a second fresh air inlet, the main channel of the fresh air duct 5 is connected to the fresh air shaft 2, the first branch of the fresh air duct 5 is connected to the air inlet of the first electric air valve 6, the air outlet of the first electric air valve 6 is connected to the above-mentioned first fresh air inlet, the second branch of the fresh air duct 5 is connected to the air inlet of the second electric air valve 8, and the air outlet of the second electric air valve 8 is connected to the above-mentioned second fresh air inlet through the fresh air fan 10.

[0041] Furthermore, in order to improve the controllability of the system of the present invention in terms of fresh air supply, the system of the present invention also includes a main air supply duct 13, a station hall air supply duct 16, a platform air supply duct 22, a third electric air valve 14, a fourth electric air valve 17 and a fifth electric air valve 23.

[0042] Specifically, the first air supply branch pipe 19 and the second air supply branch pipe 20 in the station hall serve as two outlet air branches of the station hall air supply pipe 16. The first air supply branch pipe 24 and the second air supply branch pipe 25 in the platform serve as two outlet air branches of the platform air supply pipe 22. The air inlet of the main air supply pipe 13 is connected to the air outlet of the combined air conditioning unit 12, and the air outlet of the main air supply pipe 13 is connected to the station hall air supply pipe 16 and the platform air supply pipe 22. The third electric air valve 14 is arranged at the first section of the main air supply pipe 13, and is used to control the conduction and cutoff of the main air supply pipe 13. The fourth electric air valve 17 is arranged on the air supply main road of the station hall air supply pipe 16, and is used to control the conduction and cutoff of the station hall air supply pipe 16. The fifth electric air valve 23 is arranged on the air supply main road of the platform air supply pipe 22, and is used to control the conduction and cutoff on the air supply main road.

[0043] Furthermore, in order to provide controllability of the system of the present invention at the exhaust and return air levels, the system of the present invention also includes an exhaust duct 4, a return air duct 27, a return air duct 29, a return air fan 30, a sixth electric air valve 26, an eighth electric air valve 31 and a tenth electric air valve 28.

[0044] Specifically, the air outlet of the return air duct 27 is connected to the inlet of the exhaust duct 4 through the sixth electric air valve 26, and the outlet of the exhaust duct 4 is connected to the exhaust shaft 1. The first air inlet of the return air duct 27 is connected to the air outlet of the return exhaust fan 30, and the air inlet of the return exhaust fan 30 is connected to the air outlet of the return air static pressure box 33 through the eighth electric air valve 31. One end of the return air duct 29 is connected to the exhaust duct, and the other end is connected to the air mixing chamber 11 through the tenth electric air valve 28.

[0045] Furthermore, in order to prevent smoke from blocking the pipes and equipment in the system of the present invention and to improve the air quality, the system of the present invention further includes a smoke exhaust pipe 38, a smoke exhaust fan 39 and a seventh electric air valve 40. The smoke outlet of the smoke exhaust pipe 38 is connected to the entrance of the exhaust duct 4, the smoke inlet of the smoke exhaust pipe 38 is connected to the smoke outlet of the smoke exhaust fan 39, and the smoke inlet of the smoke exhaust fan 39 is connected to the smoke outlet of the return air static pressure box 33 through the seventh electric air valve 40. By regulating the opening and closing of the seventh electric air valve 40, the conduction and cutoff of the smoke exhaust pipe 38 can be achieved.

[0046] Furthermore, in order to reduce the noise emitted by the system of the present invention and the resonance phenomenon caused by the noise between the system equipment and pipelines, the system of the present invention also includes a first muffler 3a, a second muffler 3b and a third muffler 3c. The first muffler 3a is arranged on the connecting main road between the exhaust shaft 1 and the return air static pressure box 33, the second muffler 3b is arranged on the connecting main road between the fresh air shaft 2 and the mixing chamber 11, and the third muffler 3c is arranged on the connecting pipeline between the eighth electric air valve 31 and the wind static pressure box.

[0047] In this embodiment, in order to prevent the electric air valve from becoming uncontrollable due to a malfunction, the system of the present invention further includes a first manual air valve 18a, a second manual air valve 18b, a third manual air valve 18c and a fourth manual air valve 18d.

[0048] Specifically, the first manual air valve 18a is set on the first air supply branch pipe 19 in the station hall, the second manual air valve 18b is set on the second air supply branch pipe 20 in the station hall, the third manual air valve 18c is set on the first air supply branch pipe 24 on the platform, and the fourth manual air valve 18d is set on the second air supply branch pipe 25 on the platform.

[0049] Furthermore, an eleventh electric air valve 35 is provided on the connecting pipeline between the main air supply pipe 13 and the station hall exhaust pipe 36. Furthermore, a ninth electric air valve 37 is provided on the pipe section of the station hall exhaust pipe 36 located in the public area 43 of the station hall.

[0050] It should be additionally explained that an electric two-way valve 45 is provided on the chilled water pipe 46 of the combined air-conditioning unit 12 , and the condensing effect of the combined air-conditioning unit 12 can be adjusted by controlling the opening and closing of the electric two-way valve 45 .

[0051] In this embodiment, in order to improve the safety of the system of the present invention, the system of the present invention is provided with multiple fire dampers. The specific positions of the multiple fire dampers can be seen in FIG. Figure 1 As shown, no further description is given here.

[0052] Embodiment 2

[0053] This embodiment provides a new large air conditioning system control method applied to a subway station, which is used to realize the working condition conversion of the new large air conditioning system of the subway station in Embodiment 1, and is used to realize the conversion of the system of the present invention between normal working condition, fire working condition and civil air defense working condition. The method includes:

[0054] S10: Obtain the outdoor fresh air enthalpy value, indoor return air enthalpy value and air conditioning supply air enthalpy value in real time.

[0055] S20: If the outdoor fresh air enthalpy value is greater than the indoor return air enthalpy value, the first double-supply double-exhaust mode is executed;

[0056] If the outdoor fresh air enthalpy value is greater than the air conditioning supply air enthalpy value and less than or equal to the indoor return air enthalpy value, the second double-supply and double-exhaust mode or the first supply-only mode is executed;

[0057] If the outdoor fresh air enthalpy value is less than or equal to the air conditioning supply air enthalpy value, the third double-supply and double-exhaust mode or the second supply-only mode is executed.

[0058] It should be supplemented that the second double-delivery double-row mode or the first delivery-only mode may be selected interactively. The third double-delivery double-row mode or the second delivery-only mode may be selected interactively.

[0059] Among them, as shown in Table 1, the first double-delivery double-row mode is specifically:

[0060] S21: Adjust the combined air conditioning unit, the return exhaust fan and the fresh air fan to operate in variable frequency mode;

[0061] S22: Electric drive of relevant valves to connect and supply air to the small fresh air duct, the first air supply branch pipe in the station hall, the second air supply branch pipe in the station hall, the first air supply branch pipe on the platform and the second air supply branch pipe on the platform, and to connect and return air to the exhaust duct and return air duct in the station hall.

[0062] Among them, the second double-delivery double-row mode is specifically as follows:

[0063] S23: adjusting the combined air conditioning unit and the return and exhaust fans to operate in variable frequency mode;

[0064] S24: Electric drive of relevant valves to connect the new air duct, the first air supply branch in the station hall, the second air supply branch in the station hall, the first air supply branch in the platform and the second air supply branch in the platform to supply air, connect the exhaust duct in the station hall and the return exhaust duct to return air, and connect the chilled water pipe to allow chilled water to flow in.

[0065] Among them, the first delivery mode is as follows:

[0066] S25: adjusting the combined air conditioning unit to variable frequency operation;

[0067] S26: The related valves are electrically driven to connect the new air duct, the first air supply branch pipe in the station hall, the second air supply branch pipe in the station hall, the first air supply branch pipe on the platform and the second air supply branch pipe on the platform to supply air, and the chilled water pipe is connected to allow the chilled water to flow in.

[0068] The third double-supply double-row mode is specifically as follows: on the basis of the second double-supply double-row mode, the chilled water pipe of the combined air-conditioning unit is closed, that is, the electric two-way valve is closed;

[0069] The second supply-only mode is as follows: on the basis of the first supply-only mode, the chilled water pipe of the combined air-conditioning unit is closed, that is, the electric two-way valve is closed.

[0070] Through the above technical scheme, the method of the present invention can automatically adjust the working conditions of the system of the present invention according to the actual conditions of the outdoor fresh air enthalpy value, the indoor return air enthalpy value and the air conditioning supply air enthalpy value, provide the uniformity of the system's own air supply, and reduce the air supply energy consumption.

[0071] Furthermore, since the system of the present invention requires more valve bodies to be linked and controlled, the conversion between normal working conditions, fire working conditions and civil air defense working conditions is reflected in the following Table 1:

[0072] Table 1

[0073]

[0074]

[0075] It should be noted that:

[0076] 1. In Table 1, “×” means off, “O” means on, “variable” means variable frequency operation, “industrial” means industrial frequency operation, and “-” means keep the previous state.

[0077] 2. iW- represents the outdoor fresh air enthalpy value, which is monitored by the temperature and humidity sensor installed in the fresh air booth and the temperature and humidity detector installed in the station fresh air duct; iN- represents the indoor return air enthalpy value, which is monitored by the temperature and humidity sensor installed in the return air main pipe; iS- represents the air conditioning supply air enthalpy value, which is detected by the temperature and humidity sensor installed at the air outlet of the air conditioner; Tw-station outdoor air temperature, which is monitored by the temperature and humidity detector installed at the station fresh air shaft; TN- represents the indoor return air temperature, which is measured by the temperature and humidity sensor installed on the return air main pipe; TO- represents the station air conditioning supply air temperature, which is determined by the design load calculation. TO is 19℃.

[0078] 3. The load control of the large system air conditioning condition is determined by comparing the change of Tr with the set return air temperature. When TN≤29.4℃, it means that the air conditioning load is reduced, and the dynamic balance electric regulating valve is closed to reduce the chilled water volume of the combined air conditioning unit. When TN>29.4℃, it means that the air conditioning load is increased, and the dynamic balance electric regulating valve is opened to increase the chilled water volume of the combined air conditioning unit. 4. The operating condition switching control in the normal operating state of the station is determined by comparing the changes of iW and iN with the set air conditioning supply enthalpy value iS. When iW>iN, the system enters the small fresh air air conditioning mode. The frequency of the small fresh air fan is adjusted according to the CO / 2 concentration in the station hall and platform. When 1000ppm≤CO / 2 concentration≤1200ppm, the operating frequency of the small fresh air fan is 50Hz; when 800ppm≤CO / 2 concentration≤1000ppm, the operating frequency of the small fresh air fan is 37.5Hz (adjustable); when CO / 2 concentration is <800ppm, the operating frequency of the small fresh air fan is 25Hz (adjustable); the frequency of the return and exhaust fan is calculated and determined based on the air volume balance "return and exhaust fan air volume = combined air conditioning unit supply air volume - small fresh air fan air volume". When iS<iW≤iN, the system enters the full fresh air air conditioning mode. When iW≤iS, the system enters the full ventilation mode.

[0079] 5. The enthalpy value of air is determined by the air temperature and humidity. In order to prevent the working conditions from changing frequently within a day, the enthalpy value is only required to be collected once every half an hour.

[0080] 6. The set value of CO / 2 concentration in the public area of ​​the station hall and platform is SP = 1000ppm; the sampling value PV = the average CO / 2 concentration in the station hall and platform. When one device fails, the air volume of the other combined air conditioning unit will no longer be variable.

[0081] 7. Double delivery and double queueing will be implemented during morning and evening peak hours, and only delivery without queueing will be implemented during off-peak hours.

[0082] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc. Various media that can store program codes.

[0083] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A new large air conditioning system used in subway stations, characterized in that: It comprises an exhaust shaft (1), a fresh air shaft (2), an air mixing chamber (11), a combined air conditioning unit (12), a first air supply branch pipe (19) in the station hall, a second air supply branch pipe (20) in the station hall, a return air static pressure box (33), a station hall exhaust pipe (36), a first air supply branch pipe (24) in the platform, and a second air supply branch pipe (25) in the platform; The fresh air outlet of the fresh air shaft (2) is connected to the fresh air inlet of the air mixing chamber (11) through a valve body, the air outlet of the air mixing chamber (11) is connected to the air inlet of the combined air conditioning unit (12), and the air outlet of the combined air conditioning unit (12) is connected to the first air supply branch pipe (19) of the station hall, the second air supply branch pipe (20) of the station hall, the first air supply branch pipe (24) of the platform, and the second air supply branch pipe (25) of the platform through a valve body; the first air supply branch pipe (19) of the station hall and the second air supply branch pipe (20) of the station hall are connected to the first air supply branch pipe (19) of the station hall, and the second air supply branch pipe (25) of the platform ... The second air supply branch pipe (20) in the hall is arranged in the public area (43) of the hall, and the air outlets of the first air supply branch pipe (19) in the hall and the second air supply branch pipe (20) in the hall are spaced apart from each other and are located in the public area (43) of the hall; the first air supply branch pipe (24) in the platform and the second air supply branch pipe (25) in the platform are arranged in the public area (44) of the platform, and the air outlets of the first air supply branch pipe (24) in the platform and the second air supply branch pipe (25) in the platform are spaced apart from each other and are located in the public area (44) of the platform; There is only one station hall exhaust duct (36) in the station hall public area (43), which is located in the station hall public area (43) and close to the platform public area (44). No exhaust duct is provided in the platform public area (44); the air inlet of the station hall exhaust duct (36) is located in the station hall public area (43), and the air outlet of the station hall exhaust duct (36) is connected to the air inlet of the return air static pressure box (33) through a valve body; the return air static pressure box (33) is connected to the exhaust shaft (1) through a valve body and a fan.

2. The new large air conditioning system for subway stations according to claim 1 is characterized in that: It also includes a fresh air duct (5), a first electric air valve (6), a second electric air valve (8) and a fresh air fan (10); the air mixing chamber (11) is provided with a first fresh air inlet and a second fresh air inlet; the main channel of the fresh air duct (5) is connected to the fresh air shaft (2); the first branch of the fresh air duct (5) is connected to the air inlet of the first electric air valve (6), and the air outlet of the first electric air valve (6) is connected to the first fresh air inlet; the second branch of the fresh air duct (5) is connected to the air inlet of the second electric air valve (8), and the air outlet of the second electric air valve (8) is connected to the second fresh air inlet through the fresh air fan (10).

3. The new large air conditioning system for subway stations according to claim 1 is characterized in that: The air supply pipe (13) further comprises a main air supply pipe (13), a station hall air supply pipe (16), a platform air supply pipe (22), a third electric air valve (14) for opening and closing the air supply channel of the main air supply pipe (13), a fourth electric air valve (17) for opening and closing the air supply channel of the station hall air supply pipe (16), and a fifth electric air valve (23) for opening and closing the air supply channel of the platform air supply pipe (22); the air inlet of the main air supply pipe (13) is connected to the air outlet of the combined air conditioning unit (12), the third electric air valve (14) is arranged at the first section of the main air supply pipe (13), and the main air supply pipe (13) is connected to the air outlet of the combined air conditioning unit (12). ) has an air outlet connected to the hall air supply duct (16) and the platform air supply duct (22); the hall first air supply branch pipe (19) and the hall second air supply branch pipe (20) serve as two air outlet branches of the hall air supply duct (16); the fourth electric air valve (17) is arranged on the air supply main channel of the hall air supply duct (16); the platform first air supply branch pipe (24) and the platform second air supply branch pipe (25) serve as two air outlet branches of the platform air supply duct (22); the fifth electric air valve (23) is arranged on the air supply main channel of the platform air supply duct (22).

4. The new large air conditioning system for subway stations according to claim 1 is characterized in that: It also includes a first muffler (3a) and a second muffler (3b), wherein the first muffler (3a) is arranged on a connecting passage between the exhaust shaft (1) and the return air static pressure box (33); and the second muffler (3b) is arranged on a connecting passage between the fresh air shaft (2) and the air mixing chamber (11).

5. The new large air conditioning system for subway stations according to claim 1 is characterized in that: It also includes an exhaust duct (4), a return exhaust duct (27), a return air duct (29), a return exhaust fan (30), a sixth electric air valve (26), an eighth electric air valve (31) and a tenth electric air valve (28); the air outlet of the return exhaust duct (27) is connected to the inlet of the exhaust duct (4) through the sixth electric air valve (26), and the outlet of the exhaust duct (4) is connected to the exhaust shaft (1); the first air inlet of the return exhaust duct (27) is connected to the air outlet of the return exhaust fan (30), and the air inlet of the return exhaust fan (30) is connected to the air outlet of the return air static pressure box (33) through the eighth electric air valve (31); one end of the return air duct (29) is connected to the return exhaust duct (27), and the other end is connected to the air mixing chamber (11) through the tenth electric air valve (28).

6. The new large air conditioning system for subway stations according to claim 5 is characterized in that: It also includes a smoke exhaust pipe (38), a smoke exhaust fan (39) and a seventh electric air valve (40); the smoke outlet of the smoke exhaust pipe (38) is connected to the entrance of the exhaust duct (4); the smoke inlet of the smoke exhaust pipe (38) is connected to the smoke outlet of the smoke exhaust fan (39); and the smoke inlet of the smoke exhaust fan (39) is connected to the smoke outlet of the return air static pressure box (33) through the seventh electric air valve (40).

7. The new large air conditioning system for subway stations according to claim 5 is characterized in that: It also includes a third muffler (3c), which is arranged on the connecting pipeline between the eighth electric air valve (31) and the air static pressure box.

8. The new large air conditioning system for subway stations according to claim 1 is characterized in that: It also includes a plurality of fire dampers, which are arranged on the connecting pipeline between the return air static pressure box (33) and the exhaust shaft (1).

9. The new large air conditioning system for subway stations according to claim 1 is characterized in that: The first air supply branch pipe (19) of the station hall is provided with a first manual air valve (18a); the second air supply branch pipe (20) of the station hall is provided with a second manual air valve (18b); the first air supply branch pipe (24) of the platform is provided with a third manual air valve (18c); and the second air supply branch pipe (25) of the platform is provided with a fourth manual air valve (18d).

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