CN218039312U - Fuel cell air system - Google Patents

Abstract

The utility model provides a fuel cell air system, which comprises a first blowing main path; the humidifier is provided with a first inlet, a first outlet, a second inlet and a second outlet, and the first main blowing-in path is communicated with the first inlet; the first outlet is communicated with the electric pile through a second blowing main path; the first end of the first main blowing-out path is communicated with a blowing-out port of the electric pile, the second end of the first main blowing-out path is communicated with the second inlet, and the second outlet is communicated with the second main blowing-out path, so that the air flow in the electric pile flows through the humidifier and is discharged through the second main blowing-out path; the two ends of the blowing branch circuit are respectively communicated with the first main blowing path and the second main blowing path; the first three-way valve is arranged on the first blowing main path and communicated with the first blowing main path, and the inlet end of the blowing branch is communicated with the first bypass interface of the first three-way valve. The utility model provides an among the prior art sweep the problem of the wet side air input of in-process unable regulation humidifier to the pile.

Description

Fuel cell air system

Technical Field

The utility model relates to a fuel cell engine pile sweeps technical field, particularly, relates to a fuel cell air system.

Background

At present, with the continuous development of the new energy field, more and more products use fuel cells as power sources so as to accord with the concept of environmental protection and energy conservation.

During the operation of the fuel cell, a certain water content in the galvanic pile is ensured, the humidification of the proton exchange membrane is ensured, and the hydrogen-oxygen reaction is facilitated; meanwhile, with the generation of water in the reaction, the cathode also needs to be blown and swept, so that the flooding phenomenon of the cathode is prevented. Therefore, a humidifier is arranged in the fuel cell system to humidify the air so as to ensure that the humidity in the stack is kept stable, but the air humidified by the humidifier has a certain influence on the purging.

In addition, when the flow rate of the gas flowing back into the humidifier from the galvanic pile is increased, the air inflow at the wet side of the humidifier cannot be adjusted, so that the pressure difference between the inside and the outside of a membrane tube of the humidifier is increased, and the service life of the humidifier is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a fuel cell air system to solve among the prior art and sweep the problem of the unable wet side air input that adjusts the humidifier of in-process to the pile.

In order to achieve the above object, the present invention provides a fuel cell air system, comprising: a first blow-in main passage for circulating an air flow; the humidifier is provided with a first inlet, a first outlet, a second inlet and a second outlet, and the first main blowing-in path is communicated with the first inlet; the first outlet is communicated with the electric pile through a second blowing main path; the first end of the first main blowing-out path is communicated with the blowing-out port of the electric pile, the second end of the first main blowing-out path is communicated with the second inlet, and the second outlet is communicated with the second main blowing-out path, so that the airflow in the electric pile flows through the humidifier and then is discharged through the second main blowing-out path; the two ends of the blowing branch circuit are respectively communicated with the first main blowing path and the second main blowing path; the first three-way valve is arranged on the first blowing main path and communicated with the first blowing main path, and the inlet end of the blowing branch is communicated with the first bypass interface of the first three-way valve.

Further, the fuel cell air system further includes: and the second three-way valve is arranged on the second main blowing-out path and communicated with the second main blowing-out path, and the airflow outlet of the blowing-out branch path is communicated with a second bypass interface of the second three-way valve.

Further, the fuel cell air system further includes: the gas-liquid separator is arranged on the second main blowing path and communicated with the second main blowing path, and the second three-way valve is positioned between the gas-liquid separator and the humidifier; and a silencer component which is arranged on the second main blowing path and communicated with the second main blowing path, wherein the silencer component is positioned at the outlet side of the gas-liquid separator.

Further, the fuel cell air system further includes: a first humidity detection part disposed in the humidifier; the control module, first three-way valve, second three-way valve and first humidity detection part all are connected with control module, and control module is used for receiving the humidity information that first humidity detection part detected to according to the aperture of humidity information control first three-way valve and/or second three-way valve. Further, the fuel cell air system further includes: and the two ends of the blowing branch are respectively communicated with the first blowing main path and the second blowing main path.

Further, the fuel cell air system further includes: the control valve is arranged on the blowing-in branch and communicated with the blowing-in branch, and the flow of the airflow in the blowing-in branch is adjusted through the control valve; wherein, the control valve is a one-way valve or a flow control valve; the control valve and the first three-way valve are opened synchronously.

Further, the fuel cell air system further includes: and the third three-way valve is arranged on the first blowing main path and communicated with the first blowing main path, and the airflow inlet port of the blowing branch is communicated with a third bypass interface of the third three-way valve so as to control the flow of the airflow flowing into the blowing branch by adjusting the opening of the third three-way valve.

Further, the fuel cell air system further includes: a second humidity detection part disposed in the stack; the control module, second humidity detection part, third three-way valve and first three-way valve all are connected with control module, and control module control third three-way valve and first three-way valve are opened in step to humidity information control third three-way valve and the aperture of first three-way valve that detect according to second humidity detection part.

Further, the fuel cell air system further includes: and the fourth three-way valve is arranged on the second blowing main road and communicated with the second blowing main road, and the airflow blowing end of the blowing branch is communicated with a fourth bypass joint of the fourth three-way valve.

Further, the fuel cell air system further includes: air cleaner, flow monitoring part, air compressor machine and intercooler, along the first air current circulation direction of blowing in the main road, air cleaner, flow monitoring part, air compressor machine and intercooler set gradually on the first main road of blowing in.

By applying the technical scheme of the utility model, the fuel cell air system comprises a humidifier and an electric pile, the humidifier is provided with a first inlet, a first outlet, a second inlet and a second outlet, and a first blowing main path is communicated with the first inlet; the fuel cell air system is provided with a first blowing-in main path used for circulating air flow, a humidifier, a first outlet and a second blowing-out main path, wherein the first blowing-in main path is communicated with the humidifier through a first inlet, a first outlet on the humidifier is communicated with a galvanic pile through a second blowing-in main path, a blowing-out port of the galvanic pile is communicated with a second inlet of the humidifier through the first blowing-out main path, and a second outlet of the humidifier is communicated with the second blowing-out main path; the first main blowing path is provided with a first three-way valve which is communicated with the first main blowing path, and the inlet end of the blowing branch is communicated with a first bypass interface of the first three-way valve. By utilizing the arrangement mode, when the air flow is blown out by the electric pile, a part of air flow can be controlled according to the actual operation working condition and is directly conveyed to the first main blowing-out path through the blowing-out branch circuit to be discharged, so that the air inflow of the wet side of the humidifier is adjusted, the position of the pressure difference inside and outside the membrane tube in the humidifier is stable, and the service life of the humidifier is prolonged.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic structural view of a first embodiment of a fuel cell air system according to the present invention;

fig. 2 is a schematic view showing a connection relationship between a humidifier and a stack in an embodiment of a fuel cell air system according to the present invention;

figure 3 shows a schematic structural view of a second embodiment of a fuel cell air system according to the present invention;

fig. 4 shows a control flow chart of a fuel cell air system according to the present invention.

Wherein the figures include the following reference numerals:

100. a humidifier; 101. a first inlet; 102. a first outlet; 103. a second inlet; 104. a second outlet; 200. a galvanic pile; 300. a gas-liquid separator; 400. a sound deadening member; 500. an air filter; 600. a flow monitoring component; 700. an air compressor; 800. an intercooler;

1. a first main blowing path; 2. a second blowing main path; 3. a first main blowing path; 4. a second main blowing path; 5. blowing out a branch circuit; 6. blowing in a branch; 60. a control valve; 30. a first three-way valve; 301. a first bypass interface; 40. a second three-way valve; 401. a second bypass interface; 10. a third three-way valve; 11. a third bypass interface; 20. a fourth three-way valve; 201. a fourth bypass interface.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 3, the present invention provides a fuel cell air system, including: a first main blowing path 1 for circulating an air flow; a humidifier 100, the humidifier 100 being provided with a first inlet 101, a first outlet 102, a second inlet 103, and a second outlet 104, the first main blowing path 1 being communicated with the first inlet 101; a pile 200, the first outlet 102 communicating with the pile 200 through the second main blowing path 2; a first main blowing path 3, a first end of the first main blowing path 3 being communicated with a blowing outlet of the stack 200, a second end of the first main blowing path 3 being communicated with a second inlet 103, and a second outlet 104 being communicated with the second main blowing path 4, so that the air flow in the stack 200 is discharged through the second main blowing path 4 after passing through the humidifier 100; the two ends of the blowing-out branch 5 are respectively communicated with the first main blowing-out path 3 and the second main blowing-out path 4; and a first three-way valve 30 disposed on the first main blowing path 3 and communicated with the first main blowing path 3, and an inlet end of the blowing branch 5 is communicated with the first bypass interface 301 of the first three-way valve 30.

According to the utility model provides a fuel cell air system, including humidifier 100 and galvanic pile 200, be provided with first inlet 101, first outlet 102, second inlet 103 and second outlet 104 on humidifier 100, first main 1 and the first inlet 101 intercommunication of blowing in; the first main blowing-in path 1 for the circulating air flow is communicated with the humidifier 100 through a first inlet 101, a first outlet 102 on the humidifier 100 is communicated with the electric pile 200 through a second main blowing-in path 2, a blowing-out port of the electric pile 200 is communicated with a second inlet 103 of the humidifier 100 through a first main blowing-out path 3, and a second outlet 104 of the humidifier 100 is communicated with a second main blowing-out path 4, wherein the fuel cell air system is further provided with a blowing-out branch 5, and two ends of the blowing-out branch 5 are respectively communicated with the first main blowing-out path 3 and the second main blowing-out path 4; a first three-way valve 30 is provided on the first main blowing path 3, the first three-way valve 30 is communicated with the first main blowing path 3, and the inlet end of the blowing branch 5 is communicated with the first bypass port 301 of the first three-way valve 30. By means of the arrangement mode, when the air flow is blown out from the electric pile 200, a part of the air flow can be controlled according to actual operation conditions to be directly conveyed to the first main blowing path 3 through the blowing-out branch 5 to be discharged, so that the air inflow of the wet side of the humidifier 100 is adjusted, the pressure difference inside and outside the membrane tubes in the humidifier 100 is kept stable, and the service life of the humidifier 100 is prolonged.

In the present application, the fuel cell air system further includes: the second three-way valve 40 is provided in the second main outlet path 4 and communicates with the second main outlet path 4, and the outlet of the outlet branch 5 communicates with the second bypass port 401 of the second three-way valve 40. By providing the second three-way valve 40 and cooperating with the first three-way valve 30, the flow rate of the air flow in the blowout branch 5 and the flow rate of the air flow discharged from the humidifier 100 can be controlled, and the air flow in the blowout branch 5 can be merged into the second blowout main path 4 by the second three-way valve 40.

In an embodiment of the present invention, the fuel cell air system further includes: a gas-liquid separator 300 provided in the second main blowing path 4 and communicating with the second main blowing path 4, the second three-way valve 40 being located between the gas-liquid separator 300 and the humidifier 100; a silencer component 400 provided in the second main outlet duct 4 and communicating with the second main outlet duct 4, the silencer component 400 being located on the outlet side of the gas-liquid separator 300. The gas and the liquid in the second main blowout path 4 are separated by the gas-liquid separator 300. Since the air contains humidity after passing through the humidifier 100, the air passes through the stack 200 and the humidifier 100 in this order, and then the air is separated from the liquid, and the air can be recycled, and the noise reduction part 400 is used to reduce the noise in the process of discharging the air flow from the second main blowing path 4.

In particular implementations, the fuel cell air system further includes: a first humidity detection part provided in the humidifier 100; the control module, first three-way valve 30, second three-way valve 40 and first humidity detection component all are connected with the control module, and the control module is used for receiving the humidity information that first humidity detection component detected to according to the aperture of humidity information control first three-way valve 30 and/or second three-way valve 40. The humidity in the humidifier 100 is detected in real time through the first humidity detection component, the humidity information in the humidifier 100 is fed back to the control module, the control module adjusts the opening degree of the first three-way valve 30 and/or the second three-way valve 40 according to the change of the humidity in the humidifier 100, the flow of the air flow flowing into the humidifier 100 is adjusted, and the purpose of controlling the humidity in the humidifier 100 to maintain stability is achieved, so that the humidifier 100 is protected.

Specifically, in the first embodiment provided by the present invention, in order to adjust the flow direction of the air flow, the fuel cell air system further includes: the two ends of the blowing branch 6 are respectively communicated with the first blowing main path 1 and the second blowing main path 2; and a third three-way valve 10 disposed on the first blowing main path 1 and communicated with the first blowing main path 1, wherein an airflow inlet port of the blowing branch 6 is communicated with a third bypass port 11 of the third three-way valve 10, so as to control the flow rate of the airflow flowing into the blowing branch 6 by adjusting the opening degree of the third three-way valve 10. When the air flow is blown into the humidifier 100 through the first blowing main path 1, a part of the air flow is adjusted to be directly blown into the stack 200 through the blowing branch 6 according to the actual ambient temperature and the actual humidity of the air flow, the humidity value of the air flow entering the stack 200 can be controlled, and when the opening degree of the third three-way valve 10 is adjusted to the first preset opening degree value, the proportion of the air entering the humidifier 100 and the air flowing into the blowing branch 6 is controlled, so that the humidity range of the air blown into the stack 200 is 30% ± 3%.

The fuel cell air system further includes: a second humidity detecting part disposed in the stack 200; the control module, the second humidity detection component, the third three-way valve 10 and the first three-way valve 30 are all connected with the control module, the control module controls the third three-way valve 10 and the first three-way valve 30 to be opened synchronously, and controls the opening degrees of the third three-way valve 10 and the first three-way valve 30 according to the humidity information detected by the second humidity detection component. The humidity in the cell stack 200 is detected in real time by the second humidity detection component, and the humidity information in the cell stack 200 is fed back to the control module, when the fuel cell runs at idle speed, the control module controls the third three-way valve 10 and the first three-way valve 30 to be synchronously opened, and adjusts the opening of the first three-way valve 30 to a second preset opening value by the control module, so as to adjust the proportion of the air in the first main blowing-out path 3 and the air in the blowing-out branch 5, and in addition, the third three-way valve 10 and the first three-way valve 30 are simultaneously opened, so that the risk that the humidifier 100 is damaged or the service life of the humidifier 100 is shortened due to the increase of the pressure drop inside and outside the membrane tube caused by the change of the flow of the gas entering the humidifier 100 is eliminated.

Further, the fuel cell air system further includes: and a fourth three-way valve 20 provided on the second main blowing path 2 and communicating with the second main blowing path 2, and an air flow blowing end of the branch blowing path 6 communicating with a fourth bypass port 201 of the fourth three-way valve 20. By arranging the fourth three-way valve 20, in cooperation with the third three-way valve 10, the air flow blown into the branch 6 is converged into the second blown main path 2 by the fourth three-way valve 20, and then directly blown into the stack 200.

In the second embodiment, as shown in fig. 3, in order to make the structure of the fuel cell air system simpler, the control flow is optimized, and the purpose of adjusting the humidity of the gas entering the stack 200 is achieved, the fuel cell system further includes: and the control valve 60 is arranged on the blowing branch 6 and communicated with the blowing branch 6, and the flow rate of the airflow in the blowing branch 6 is regulated through the control valve 60. The control valve 60 is a one-way valve or a flow control valve; and/or the control valve 60 is opened in synchronism with the first three-way valve 30. The control valve 60 on the blowing branch 6 can be used for adjusting the flow of the air flow in the blowing branch 6 according to actual requirements, when the humidity in the air is low, the control valve 60 can be directly closed, and the air is prevented from being directly blown into the galvanic pile 200 through the blowing branch 6; preferably, the control valve 60 is provided as a one-way valve, which also prevents the second air flow blown into the main path 2 from flowing back into the first main blowing path 1 through the blowing branch 6.

In the present application, the third three-way valve 10 has three interfaces, and when the third three-way valve 10 is disposed on the first main insufflation path 1, the third three-way valve communicates with the first main insufflation path 1 through the first inflow interface and the first outflow interface, and communicates with the branch insufflation path 6 through the third bypass interface 11; similarly, the fourth three-way valve 20 has three ports, and the second inflow port and the second outflow port of the fourth three-way valve 20 are communicated with the second main blowing path 2 and communicated with the branch blowing path 6 by using the fourth bypass port 201 of the fourth three-way valve 20; the first three-way valve 30 has three interfaces, a third inflow interface and a third outflow interface of the first three-way valve 30 are respectively communicated with the first main blowing path 3, and a first bypass interface 301 of the first three-way valve 30 is communicated with the blow-out branch 5; the second three-way valve 40 has three ports, a fourth inflow port and a fourth outflow port of the second three-way valve 40 are respectively communicated with the second main blowout path 4, and a second bypass port 401 of the second three-way valve 40 is communicated with the blowout branch 5.

In a specific implementation, the fuel cell air system further comprises: air cleaner 500, flow monitoring component 600, air compressor 700 and intercooler 800, along the first air current circulation direction of blowing into main road 1, air cleaner 500, flow monitoring component 600, air compressor 700 and intercooler 800 set gradually on the first main road 1 of blowing into. The air flow blown into the first main passage 1 is filtered by the air filter 500. This prevents impurities in the air from entering the humidifier 100 to cause damage to the humidifier 100; the flow rate of the air flow in the first main blowing path 1 is monitored by the flow rate monitoring means 600. Preferably, the flow rate monitoring means 600 is a flow meter, by means of which the flow rate of the air flow in the first main blowing path 1 is monitored; utilize air compressor machine 700 to make the first air current that blows into in the main road 1 increase to improve the velocity of flow of air current, protect air compressor machine 700 through intercooler 800.

In the practical application process, as shown in fig. 4, firstly, the performance of the humidifier is tested, the humidifier stably operates for 15min under the rated working condition of the system, the dry-out humidity value of the humidifier and the moisture content of the humidifier are tested, and the moisture content of the humidifier is converted according to a conversion formula (H = m) of the moisture content of the humidifier _{Water (W)} /m _{Qi (Qi)} ) Calculating the amount of dry air entering the humidifier and the amount of bypass dry air when the first outlet reaches a humidity range of 30% +/-3%, then confirming the flow, temperature and pressure of system gas during purging, then adjusting the flow of gas entering the humidifier and flowing into the branch by using a third three-way valve to control the humidity of gas entering the cell stack 200 from the first outlet of the humidifier, further, operating the cell stack under an idle working condition during purging, purging according to the flow at a rated operating pressure (150 KPaA, the temperature of 57 +/-3 ℃), setting the humidity of purging gas to be 30% +/-3%, adjusting the third three-way valve to a certain opening degree, and controlling the proportion of dry air entering the humidifier and dry air blown into the branch to reach the humidity range of 30% +/-3% of stack entering air. This also avoids the risk of freezing of the gas entering the stack 200 during cold system start-up.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

according to the utility model provides a fuel cell air system, including humidifier 100 and galvanic pile 200, be provided with first inlet 101, first outlet 102, second inlet 103 and second outlet 104 on humidifier 100, first main 1 and the first inlet 101 intercommunication of blowing in; the first main blowing-in path 1 for the circulating air flow is communicated with the humidifier 100 through a first inlet 101, a first outlet 102 on the humidifier 100 is communicated with the electric pile 200 through a second main blowing-in path 2, a blowing-out port of the electric pile 200 is communicated with a second inlet 103 of the humidifier 100 through a first main blowing-out path 3, and a second outlet 104 of the humidifier 100 is communicated with a second main blowing-out path 4, wherein the fuel cell air system is further provided with a blowing-out branch 5, and two ends of the blowing-out branch 5 are respectively communicated with the first main blowing-out path 3 and the second main blowing-out path 4; a first three-way valve 30 is disposed on the first main blowing path 3, the first three-way valve 30 is communicated with the first main blowing path 3, and an inlet end of the blowing branch 5 is communicated with a first bypass interface 301 of the first three-way valve 30. By means of the arrangement mode, when the air flow is blown out from the electric pile 200, a part of the air flow can be controlled according to actual operation conditions to be directly conveyed to the first main blowing path 3 through the blowing-out branch 5 to be discharged, so that the air inflow of the wet side of the humidifier 100 is adjusted, the position of the pressure difference between the inside and the outside of the membrane tube in the humidifier 100 is stable, and the service life of the humidifier 100 is prolonged.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A fuel cell air system, comprising:

a first main blowing path (1) for circulating an air flow;

the humidifier (100) is provided with a first inlet (101), a first outlet (102), a second inlet (103) and a second outlet (104), and the first blowing main path (1) is communicated with the first inlet (101);

a galvanic pile (200), said first outlet (102) communicating with said galvanic pile (200) through a second main insufflation path (2);

a first main blowing path (3), a first end of the first main blowing path (3) is communicated with a blowing outlet of the electric pile (200), a second end of the first main blowing path (3) is communicated with the second inlet (103), and the second outlet (104) is communicated with a second main blowing path (4), so that the airflow in the electric pile (200) is discharged through the second main blowing path (4) after flowing through the humidifier (100);

a blow-out branch (5), wherein two ends of the blow-out branch (5) are respectively communicated with the first main blow-out path (3) and the second main blow-out path (4);

the first three-way valve (30) is arranged on the first main blowing path (3) and communicated with the first main blowing path (3), and the inlet end of the blowing branch (5) is communicated with a first bypass interface (301) of the first three-way valve (30).

2. The fuel cell air system according to claim 1, further comprising:

and the second three-way valve (40) is arranged on the second main blowing-out path (4) and is communicated with the second main blowing-out path (4), and the airflow outlet of the blowing-out branch (5) is communicated with a second bypass interface (401) of the second three-way valve (40).

3. The fuel cell air system according to claim 2, further comprising:

a gas-liquid separator (300) provided on the second main blowout path (4) and communicating with the second main blowout path (4), the second three-way valve (40) being located between the gas-liquid separator (300) and the humidifier (100);

a silencer component (400) provided on the second main blowing path (4) and communicating with the second main blowing path (4), the silencer component (400) being located at an outlet side of the gas-liquid separator (300).

4. The fuel cell air system according to claim 2, further comprising:

a first humidity detection part provided inside the humidifier (100);

the control module, first three-way valve (30), second three-way valve (40) and first humidity detection component all with control module is connected, control module is used for receiving the humidity information that first humidity detection component detected to according to the aperture of humidity information control first three-way valve (30) and/or second three-way valve (40).

5. The fuel cell air system according to claim 1, further comprising:

blow in branch road (6), the both ends that blow in branch road (6) respectively with first main road (1) of blowing in with the second blows in main road (2) intercommunication.

6. The fuel cell air system according to claim 5, further comprising:

the control valve (60) is arranged on the blowing-in branch (6) and communicated with the blowing-in branch (6), and the flow rate of the airflow in the blowing-in branch (6) is adjusted through the control valve (60);

wherein the control valve (60) is a one-way valve or a flow control valve; the control valve (60) is opened in synchronism with the first three-way valve (30).

7. The fuel cell air system according to claim 5, further comprising:

and the third three-way valve (10) is arranged on the first blowing main path (1) and communicated with the first blowing main path (1), and an airflow inlet port of the blowing branch (6) is communicated with a third bypass interface (11) of the third three-way valve (10) so as to control the flow of the airflow flowing into the blowing branch (6) by adjusting the opening degree of the third three-way valve (10).

8. The fuel cell air system according to claim 7, further comprising:

a second humidity detection part disposed in the stack (200);

and the second humidity detection component, the third three-way valve (10) and the first three-way valve (30) are connected with the control module, the control module controls the third three-way valve (10) and the first three-way valve (30) to be synchronously opened, and controls the opening degree of the third three-way valve (10) and the first three-way valve (30) according to the humidity information detected by the second humidity detection component.

9. The fuel cell air system according to claim 7, further comprising:

and the fourth three-way valve (20) is arranged on the second blowing main path (2) and communicated with the second blowing main path (2), and the airflow blowing end of the blowing branch (6) is communicated with a fourth bypass interface (201) of the fourth three-way valve (20).

10. The fuel cell air system according to any one of claims 1 to 9, further comprising:

air cleaner (500), flow monitoring part (600), air compressor machine (700) and intercooler (800), along the first air current circulation direction of blowing into main road (1), air cleaner (500) flow monitoring part (600) air compressor machine (700) and intercooler (800) set gradually first blow into on the main road (1).

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