CN111806487A - Intelligent air purification system of high-speed train and control method thereof - Google Patents
Intelligent air purification system of high-speed train and control method thereof Download PDFInfo
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- CN111806487A CN111806487A CN202010726850.5A CN202010726850A CN111806487A CN 111806487 A CN111806487 A CN 111806487A CN 202010726850 A CN202010726850 A CN 202010726850A CN 111806487 A CN111806487 A CN 111806487A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
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Abstract
The invention discloses an intelligent air purification system for a high-speed train, which comprises a fresh air main pipe and a return air main pipe, wherein flow regulating valves are respectively arranged on the fresh air main pipe and the return air main pipe; the filter core includes the frame, and the frame is pegged graft with the slot and is cooperated, and the frame internal fixation has the filter core body, and the air inlet side and the air-out side of frame have the coupling respectively to have a plurality of upset baffle, and the surface mounting of upset baffle has wind pressure sensor. The invention can improve the defects of the prior art, effectively monitor the air filter element and is convenient to operate in the replacement process.
Description
Technical Field
The invention relates to the technical field of intelligent control of high-speed trains, in particular to an intelligent air purification system of a high-speed train and a control method thereof.
Background
With the rapid construction of the highway network in China, more and more high-speed trains are put into use. Because the high-speed train is fast in speed and high in requirement on the sealing performance of the carriage, operations such as air exchange, purification, temperature regulation and the like of the air in the carriage of the high-speed train need to be completed by a special air purification system. The existing air purification system of the high-speed train is complex in structure, but the using state of an air filter element cannot be effectively monitored, the replacement of the filter element is completely controlled by a replacement period determined by an empirical value, and the replacement process easily causes secondary pollution to the operating environment.
Disclosure of Invention
The invention aims to provide an intelligent air purification system of a high-speed rail train and a control method thereof, which can overcome the defects of the prior art, simplify the complexity of the system, effectively monitor an air filter element, facilitate the operation of the replacement process and avoid secondary pollution to the operation environment.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
An intelligent air purification system of a high-speed train comprises a fresh air main pipe and a return air main pipe, wherein flow regulating valves are respectively arranged on the fresh air main pipe and the return air main pipe, the tail end of the fresh air main pipe is respectively connected with a fresh air temperature regulating pipe and a fresh air bypass pipe, an air conditioning temperature regulating module is arranged on the fresh air temperature regulating pipe, the fresh air bypass pipe and the return air main pipe are jointly connected to a primary return air pipe, the fresh air temperature regulating pipe and the primary return air pipe are jointly connected to a mixing cavity, a slot is formed in the inner wall of the mixing cavity, a filter element is inserted into the slot, the air outlet side of the mixing cavity is connected with an air outlet; the filter element comprises a frame, the frame is in inserting fit with the inserting grooves, a filter element body is fixed in the frame, a plurality of overturning baffles are respectively and axially connected to the air inlet side and the air outlet side of the frame, threaded mounting holes are formed in the surfaces of the overturning baffles, and air pressure sensors are mounted on the threaded mounting holes; the input end of the controller is respectively in communication connection with the temperature sensor and the air pressure sensor, and the output end of the controller is respectively in communication connection with the flow regulating valve and the air conditioner temperature regulating module.
Preferably, the adjacent wind pressure sensors are arranged in a staggered mode.
Preferably, a rubber sealing strip is fixed on the edge of the overturning baffle.
Preferably, the surface of the filter element body is provided with grooves in one-to-one correspondence with the wind pressure sensors, the grooves are coaxially arranged with the wind pressure sensors, a baffle is arranged between the wind pressure sensors and the grooves, and the baffle is connected to the turnover baffle in a shaft mode.
Preferably, a signal output end of the wind pressure sensor is provided with a filter module, an input end of the filter module is connected with a signal output end of the wind pressure sensor, an input end of the filter module is connected to a reverse input end of the first operational amplifier through a first capacitor and a second capacitor which are connected in series, the first capacitor and the second capacitor are grounded through a third capacitor, a forward input end of the first operational amplifier is grounded through a first resistor, a reverse input end of the first operational amplifier is connected to an output end of the first operational amplifier through a second resistor, the first capacitor and the second capacitor are connected to an output end of the first operational amplifier through a fourth capacitor, a reverse input end of the first operational amplifier is connected to a forward input end of the second operational amplifier through a third resistor, a reverse input end of the second operational amplifier is grounded through a fourth resistor, and an output end of the second operational amplifier is connected to a reverse input end of the third operational amplifier through a fifth resistor and a sixth resistor which are connected, the positive input end of the third operational amplifier is grounded through a seventh resistor, the reverse input end of the third operational amplifier is connected to the output end of the third operational amplifier through a fifth capacitor, the output end of the third operational amplifier is connected to the positive input end of the second operational amplifier through an eighth resistor, a base electrode of a triode is connected between the fifth resistor and a sixth resistor, the base electrode of the triode is grounded through a fifteenth resistor and an inductor which are connected in series, a collector electrode of the triode is connected to a high level, an emitter electrode of the triode is connected to the positive input end of the fourth operational amplifier through a ninth resistor, the output end of the first operational amplifier is connected to the positive input end of the fourth operational amplifier through a tenth resistor, the positive input end of the fourth operational amplifier is grounded through an eleventh resistor, the reverse input end of the fourth operational amplifier is grounded through a twelfth resistor, the reverse input end of the fourth operational amplifier is connected to the output end of the fourth operational amplifier through a thirteenth resistor, and the output end of the fourth operational amplifier is connected to the, and the output end of the filtering module is used as the signal output end of the wind pressure sensor.
A control method of the intelligent air purification system of the high-speed train comprises the following steps:
A. presetting a fresh air inlet volume range, an air outlet temperature range of an air outlet pipe and a return air temperature range of a primary return air pipe, and presetting a wind pressure differential pressure threshold value for replacing a filter element;
B. when the actual return air temperature of the primary return air pipe exceeds a preset temperature range, the actual return air temperature is adjusted preferentially in a mode of changing the fresh air inlet volume within the fresh air inlet volume setting range, and when the actual return air temperature of the primary return air pipe cannot be restored to the preset temperature range through a mode of independently changing the fresh air inlet volume, the air conditioner temperature adjusting module is started to adjust the temperature; in the temperature adjusting process, the actual air outlet temperature of the air outlet pipe is kept not to exceed a set temperature range;
C. the wind pressure difference of the two sides of the filter element is monitored in real time through the wind pressure sensor, and when the total duration that the wind pressure difference exceeds a set threshold value within any continuous 1min is more than 30s, the filter element replacement is prompted.
Preferably, the step C of monitoring the wind pressure difference between the two sides of the filter element comprises the following steps,
c1, setting a wind pressure value deviation threshold value, and collecting wind pressure value curves of different wind pressure sensors positioned on the same side;
c2, synchronously traversing the wind pressure value curves collected in the step C1, when the wind pressure value deviation of any two wind pressure value curves at the same moment is larger than the deviation threshold set in the step C1, setting a segmentation mark, and segmenting the wind pressure value curves according to the segmentation mark until the traversal is finished;
c3, obtaining the total average value of all the wind pressure value curves in each section and the individual average value of each wind pressure value curve section, if the individual average value exceeds the range of [ total average value x (1 +/-30%) ], deleting the corresponding wind pressure value curve;
and C4, respectively obtaining the average value of the wind pressure value curves at the two sides of the filter element processed in the step C3, and obtaining the wind pressure difference at the two sides of the filter element by taking the difference of the two average values.
Preferably, in step C2, the fluctuations in each wind pressure curve are classified into periodic fluctuations and aperiodic fluctuations, and the positions of the wind pressure curves on the time axis are adjusted according to the phase difference of the periodic fluctuations with the same frequency in different wind pressure curves, so as to achieve synchronization of the different wind pressure curves.
Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, through an optimized control strategy, the number of the temperature sensors and the flow regulating valves is effectively reduced, the air temperature in the carriage is regulated in a fresh air priority mode, energy is saved, and the freshness of the air in the carriage can be ensured to the greatest extent. The invention carries out special design on the filter element structure, the turning baffles with the rubber sealing strips are arranged on the two sides of the filter element, the turning baffles are closed firstly when the old filter element is disassembled, dust attached to the surface of the filter element can be effectively prevented from being diffused into the air when the filter element is disassembled, and the turning baffles are opened after the new filter element is installed, so that normal air filtration can be carried out. Because the distance of upset baffle and filter core body is fixed, so fix the wind pressure sensor on the upset baffle, can the accurate distance of injecing wind pressure sensor and filter core body to guarantee the relative accuracy between the different wind pressure curves of later stage collection. The wind pressure sensors are arranged in a staggered mode, and the distribution uniformity of collection points of the whole filtering surface can be improved. Since the newly installed wind pressure sensor has data deviation after each filter element replacement, the data needs to be corrected through software, and the process is very time-consuming. According to the invention, the wind pressure sensors which are in one-to-one correspondence with the grooves are arranged, the grooves are utilized to form a local stable airflow state in the detection range of the wind pressure sensors, and meanwhile, the angle of the baffle plate is adjusted to realize the correction of the detection data of the wind pressure sensors, so that the consistency of the detection data among different wind pressure sensors is ensured. Install the filtering module at wind pressure sensor signal output end and be simple high pass filter, this wave filter keeps and strengthens the pulse fluctuation of large amplitude on the basis of realizing basic high pass filtering to avoid because the undulant disappearance influence of low frequency that the filtering leads to is to the undulant classification in the wind pressure value curve, the third electric capacity is used for carrying out the prefiltration to the clutter in the fluctuation value of carrying out the enhancement, thereby improve the stability after the pulse fluctuation strengthens. The invention uses a mode of multipoint acquisition and average calculation to calculate the wind pressure difference, and can ensure the high similarity of the average and the actual wind pressure while reducing the calculation amount by synchronously adjusting and sectionally screening the wind pressure value curve when calculating the average.
Drawings
FIG. 1 is a block diagram of one embodiment of the present invention.
FIG. 2 is a block diagram of a mixing chamber in accordance with one embodiment of the present invention.
Fig. 3 is a block diagram of a roll-over damper in accordance with an embodiment of the present invention.
Fig. 4 is a circuit diagram of a filtering module in an embodiment of the invention.
Detailed Description
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.
Referring to fig. 1-4, a specific embodiment of the present invention includes a fresh air main pipe 1 and a return air main pipe 2, wherein the fresh air main pipe 1 and the return air main pipe 2 are respectively provided with a flow regulating valve 3, the end of the fresh air main pipe 1 is respectively connected with a fresh air temperature regulating pipe 4 and a fresh air bypass pipe 5, the fresh air temperature regulating pipe 4 is provided with an air conditioning temperature regulating module 6, the fresh air bypass pipe 5 and the return air main pipe 2 are jointly connected to a primary return air pipe 7, the fresh air temperature regulating pipe 4 and the first return air pipe 7 are jointly connected to a mixing chamber 8, the inner wall of the mixing chamber 8 is provided with a slot 18, the slot 18 is inserted with a filter element 9, the air outlet side of the mixing chamber 8 is connected with an air; the filter element 9 comprises a frame 12, the frame 12 is in inserted fit with a slot 18, a filter element body 13 is fixed in the frame 12, a plurality of turnover baffles 14 are respectively coupled to the air inlet side and the air outlet side of the frame 12, threaded mounting holes 15 are formed in the surfaces of the turnover baffles 14, and a wind pressure sensor 16 is mounted on the threaded mounting holes 15; the input end of the controller 17 is respectively in communication connection with the temperature sensor 11 and the air pressure sensor 16, and the output end of the controller 17 is respectively in communication connection with the flow regulating valve 3 and the air conditioner temperature regulating module 6. The adjacent wind pressure sensors 16 are arranged in a staggered manner. The edge of the turnover baffle plate 14 is fixed with a rubber sealing strip 19. The surface of the filter element body 13 is provided with grooves 20 corresponding to the wind pressure sensors 16 one by one, the grooves 20 are coaxial with the wind pressure sensors 16, a baffle plate 21 is arranged between the wind pressure sensors 16 and the grooves 20, and the baffle plate 21 is coupled to the turnover baffle plate 14.
When replacing the filter cartridge, the air pressure sensor 16 is first removed and then all the flap 14 is closed, so that the used filter cartridge 9 can be pulled out of the mixing chamber 8. After a new filter element 9 is inserted into the mixing chamber 8, the entire turn-over flap 14 is opened to mount the wind pressure sensor 16 on the corresponding threaded mounting hole 15. By rotating the baffle plate 21, the correction of the wind pressure sensor 16 is realized.
A signal output end of the wind pressure sensor 16 is provided with a filter module, an input end IN of the filter module is connected with a signal output end of the wind pressure sensor 16, the input end IN of the filter module is connected to an inverting input end of a first operational amplifier a1 through a first capacitor C1 and a second capacitor C2 which are connected IN series, the first capacitor C1 and the second capacitor C2 are grounded through a third capacitor C3, a forward input end of the first operational amplifier a1 is grounded through a first resistor R1, an inverting input end of the first operational amplifier a1 is connected to an output end of the first operational amplifier a1 through a second resistor R2, the first capacitor C1 and the second capacitor C2 are connected to an output end of the first operational amplifier a1 through a fourth capacitor C4, an inverting input end of the first operational amplifier a1 is connected to a forward input end of the second operational amplifier a2 through a third resistor R3, an inverting input end of the second operational amplifier a2 is grounded through a fourth resistor R4, an output end of the second operational amplifier a A582 is connected to an inverting input end of the sixth resistor R8653 and a resistor R828653 which are connected IN series, a forward input end of the third operational amplifier A3 is grounded through a seventh resistor R7, an inverting input end of the third operational amplifier A3 is connected to an output end of the third operational amplifier A3 through a fifth capacitor C5, an output end of the third operational amplifier A3 is connected to a forward input end of the second operational amplifier a2 through an eighth resistor R8, a base of the triode Q is connected between the fifth resistor R5 and the sixth resistor R6, the base of the triode Q is grounded through a fifteenth resistor R15 and an inductor L connected in series, a collector of the triode Q is connected to a high level VCC, an emitter of the triode Q is connected to a forward input end of the fourth operational amplifier A4 through a ninth resistor R9, an output end of the first operational amplifier a1 is connected to a forward input end of the fourth operational amplifier A4 through a tenth resistor R10, a forward input end of the fourth operational amplifier A4 is grounded through an eleventh resistor R11, an inverting input end of the fourth operational amplifier A4 is grounded through a twelfth resistor R12, a thirteenth resistor R4 is connected to an output end of the fourth operational amplifier a 599, an output end of the fourth operational amplifier a4 is connected to an output end OUT of the filter module through a fourteenth resistor R14, and the output end OUT of the filter module is used as a signal output end of the wind pressure sensor 16.
The first resistor R1 is 2.2k Ω, the second resistor R2 is 0.5 k Ω, the third resistor R3 is 1.3 k Ω, the fourth resistor R4 is 2k Ω, the fifth resistor R5 is 0.25 k Ω, the sixth resistor R6 is 3.5 k Ω, the seventh resistor R7 is 0.95 k Ω, the eighth resistor R8 is 0.55, the ninth resistor R9 is 0.3 k Ω, the tenth resistor R10 is 1.2 k Ω, the eleventh resistor R11 is 5k Ω, the twelfth resistor R12 is 0.5 k Ω, the thirteenth resistor R13 is 1.5 k Ω, the fourteenth resistor R14 is 0.75k Ω, the fifteenth resistor R15 is 3 k Ω, the first capacitor C1 is 350 μ F, the second capacitor C6 is 200 μ F, the third capacitor C3 VCC is 0.75k Ω, the fifteenth resistor R15 is 3 k Ω, the first capacitor C1 μ F is 350 μ F, the fifth capacitor C4 μ F is 500 μ F, and the fifth capacitor C4 μ F is 3612 μ L.
A control method of the intelligent air purification system of the high-speed train comprises the following steps:
A. presetting a fresh air inlet volume range, an air outlet temperature range of an air outlet pipe 10 and a return air temperature range of a primary return air pipe 7, and presetting a wind pressure differential pressure threshold value for replacing a filter element;
B. when the actual return air temperature of the primary return air pipe 7 exceeds the preset temperature range, the actual return air temperature is preferentially adjusted by changing the fresh air inlet volume within the fresh air inlet volume setting range, and when the actual return air temperature of the primary return air pipe 7 cannot be restored to the preset temperature range by independently changing the fresh air inlet volume, the air-conditioning temperature adjusting module 6 is started to adjust the temperature; in the temperature adjusting process, the actual air outlet temperature of the air outlet pipe 10 is kept not to exceed the set temperature range;
C. the wind pressure difference of the two sides of the filter element 9 is monitored in real time through the wind pressure sensor 16, and when the total duration that the wind pressure difference exceeds a set threshold value within any continuous 1min is more than 30s, the filter element replacement is prompted.
In the step C, the monitoring of the wind pressure difference on the two sides of the filter element 9 comprises the following steps,
c1, setting a wind pressure value deviation threshold value, and collecting wind pressure value curves of different wind pressure sensors 16 positioned on the same side;
c2, synchronously traversing the wind pressure value curves collected in the step C1, when the wind pressure value deviation of any two wind pressure value curves at the same moment is larger than the deviation threshold set in the step C1, setting a segmentation mark, and segmenting the wind pressure value curves according to the segmentation mark until the traversal is finished;
c3, obtaining the total average value of all the wind pressure value curves in each section and the individual average value of each wind pressure value curve section, if the individual average value exceeds the range of [ total average value x (1 +/-30%) ], deleting the corresponding wind pressure value curve;
and C4, respectively obtaining the average values of the wind pressure value curves at the two sides of the filter element 9 processed in the step C3, and obtaining the wind pressure difference at the two sides of the filter element 9 by subtracting the two average values.
In step C2, the fluctuations in each wind pressure curve are classified into periodic fluctuations and aperiodic fluctuations, and the positions of the wind pressure curves on the time axis are adjusted according to the phase difference of the periodic fluctuations of the same frequency in different wind pressure curves, so as to achieve synchronization of the different wind pressure curves.
Local turbulence is easily generated on the surface of the filter element due to the portion blocked by the inside of the filter element, and if the turbulence occurs near the groove 20, the local turbulence is more obvious, and the local turbulence is represented by pulse-shaped fluctuation with large amplitude on the curve of the wind pressure value. The filtering module used by the invention can reserve and strengthen the pulse fluctuation with large amplitude, so that the large-amplitude pulse fluctuation on the wind pressure value curve is monitored while the wind pressure difference is monitored, and when the large-amplitude pulse fluctuation strengthened by the filtering module for more than or equal to 8 times appears in continuous 1min, the filter element replacement is prompted.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an intelligent air purification system of high-speed railway train, is responsible for (2) including the new trend (1) and return air, installs flow control valve (3), its characterized in that on the new trend is responsible for (1) and return air is responsible for (2) respectively: the tail end of the fresh air main pipe (1) is respectively connected with a fresh air temperature adjusting pipe (4) and a fresh air bypass pipe (5), an air conditioner temperature adjusting module (6) is installed on the fresh air temperature adjusting pipe (4), the fresh air bypass pipe (5) and the return air main pipe (2) are jointly connected to a primary return air pipe (7), the fresh air temperature adjusting pipe (4) and the primary return air pipe (7) are jointly connected to a mixing cavity (8), a slot (18) is formed in the inner wall of the mixing cavity (8), a filter element (9) is inserted into the slot (18), an air outlet pipe (10) is connected to the air outlet side of the mixing cavity (8), and temperature sensors (11) are respectively installed on the primary return air pipe (7) and the air outlet; the filter element (9) comprises a frame (12), the frame (12) is in plug fit with a slot (18), a filter element body (13) is fixed in the frame (12), the air inlet side and the air outlet side of the frame (12) are respectively and axially connected with a plurality of turning baffles (14), the surfaces of the turning baffles (14) are provided with threaded mounting holes (15), and wind pressure sensors (16) are mounted on the threaded mounting holes (15); the input end of the controller (17) is respectively in communication connection with the temperature sensor (11) and the air pressure sensor (16), and the output end of the controller (17) is respectively in communication connection with the flow regulating valve (3) and the air-conditioning temperature regulating module (6).
2. The intelligent air purification system of high-speed train according to claim 1, wherein: the adjacent wind pressure sensors (16) are arranged in a staggered mode.
3. The intelligent air purification system of high-speed train according to claim 2, wherein: and a rubber sealing strip (19) is fixed at the edge of the overturning baffle plate (14).
4. The intelligent air purification system of high-speed train according to claim 3, wherein: the filter core body (13) surface is provided with recess (20) with wind pressure sensor (16) one-to-one, and recess (20) and wind pressure sensor (16) coaxial setting are provided with baffle (21) between wind pressure sensor (16) and recess (20), and baffle (21) hub connection is on upset baffle (14).
5. The intelligent air purification system of high-speed train according to claim 4, wherein: the signal output end of the wind pressure sensor (16) is provided with a filter module, the input end (IN) of the filter module is connected with the signal output end of the wind pressure sensor (16), the input end (IN) of the filter module is connected with the reverse input end of a first operational amplifier (A1) through a first capacitor (C1) and a second capacitor (C2) which are connected IN series, the first capacitor (C1) and the second capacitor (C2) are grounded through a third capacitor (C3), the forward input end of the first operational amplifier (A1) is grounded through a first resistor (R1), the reverse input end of the first operational amplifier (A1) is connected with the output end of the first operational amplifier (A1) through a second resistor (R2), the first capacitor (C1) and the second capacitor (C2) are connected with the output end of the first operational amplifier (A1) through a fourth capacitor (C4), the reverse input end of the first operational amplifier (A1) is connected with the forward input end of the second operational amplifier (A2) through a third resistor (R3), the reverse input end of the second operational amplifier (A2) is grounded through a fourth resistor (R4), the output end of the second operational amplifier (A2) is connected to the reverse input end of a third operational amplifier (A3) through a fifth resistor (R5) and a sixth resistor (R6) which are connected in series, the forward input end of the third operational amplifier (A3) is grounded through a seventh resistor (R7), the reverse input end of the third operational amplifier (A3) is connected to the output end of the third operational amplifier (A3) through a fifth capacitor (C5), the output end of the third operational amplifier (A3) is connected to the forward input end of the second operational amplifier (A2) through an eighth resistor (R8), a base of a triode (Q) is connected between the fifth resistor (R5) and the sixth resistor (R6), a base of the triode (Q) is connected to the ground through a fifteenth resistor (R15) and an inductor (L) which are connected in series, a collector of the triode (Q) is connected to the emitter of a ninth operational amplifier (R9), and a collector of the ninth operational amplifier (Q) is connected to a ninth resistor (R4), the output end of the first operational amplifier (A1) is connected to the forward input end of the fourth operational amplifier (A4) through a tenth resistor (R10), the forward input end of the fourth operational amplifier (A4) is grounded through an eleventh resistor (R11), the reverse input end of the fourth operational amplifier (A4) is grounded through a twelfth resistor (R12), the reverse input end of the fourth operational amplifier (A4) is connected to the output end of the fourth operational amplifier (A4) through a thirteenth resistor (R13), the output end of the fourth operational amplifier (A4) is connected to the output end of the filter module (OUT) through a fourteenth resistor (R14), and the output end of the filter module (OUT) serves as the signal output end of the wind pressure sensor (16).
6. The control method of the intelligent air purification system of the high-speed train as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
A. presetting a fresh air inlet volume range, an air outlet temperature range of an air outlet pipe (10) and a return air temperature range of a primary return air pipe (7), and presetting a wind pressure differential pressure threshold value for replacing a filter element;
B. when the actual return air temperature of the primary return air pipe (7) exceeds a preset temperature range, the actual return air temperature is adjusted preferentially in a mode of changing the fresh air inlet volume within a fresh air inlet volume setting range, and when the actual return air temperature of the primary return air pipe (7) cannot be restored to the preset temperature range through a mode of independently changing the fresh air inlet volume, the air-conditioning temperature adjusting module (6) is started to adjust the temperature; in the temperature adjusting process, the actual air outlet temperature of the air outlet pipe (10) is kept not to exceed a set temperature range;
C. the wind pressure difference of two sides of the filter element (9) is monitored in real time through the wind pressure sensor (16), and when the total duration that the wind pressure difference exceeds a set threshold value within any continuous 1min is more than 30s, the filter element replacement is prompted.
7. The control method of the intelligent air purification system of the high-speed train according to claim 6, wherein: in the step C, the monitoring of the wind pressure difference on the two sides of the filter element (9) comprises the following steps,
c1, setting a wind pressure value deviation threshold value, and collecting wind pressure value curves of different wind pressure sensors (16) positioned on the same side;
c2, synchronously traversing the wind pressure value curves collected in the step C1, when the wind pressure value deviation of any two wind pressure value curves at the same moment is larger than the deviation threshold set in the step C1, setting a segmentation mark, and segmenting the wind pressure value curves according to the segmentation mark until the traversal is finished;
c3, obtaining the total average value of all the wind pressure value curves in each section and the individual average value of each wind pressure value curve section, if the individual average value exceeds the range of [ total average value x (1 +/-30%) ], deleting the corresponding wind pressure value curve;
and C4, respectively obtaining the average value of the wind pressure value curves at the two sides of the filter element (9) processed in the step C3, and obtaining the wind pressure difference at the two sides of the filter element (9) by subtracting the two average values.
8. The control method of the intelligent air purification system of the high-speed train according to claim 7, wherein: in step C2, the fluctuations in each wind pressure curve are classified into periodic fluctuations and aperiodic fluctuations, and the positions of the wind pressure curves on the time axis are adjusted according to the phase difference of the periodic fluctuations of the same frequency in different wind pressure curves, so as to achieve synchronization of the different wind pressure curves.
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