A cooling system for annealing furnace A, B, C zone, Ret zone and F zone

Abstract

The present invention provides a cooling system for zones A, B, C, Ret and F of an annealing furnace, including a cooling device for zone A, a cooling device for zone B, a cooling device for zone C, a cooling device for zone Ret, a cooling device for zone F, a fan air outlet system and a fan air inlet system. The fan air outlet system is used to control the air volume of zones A, B and C, and the fan air inlet system is used to control the air volume of zones Ret and F. The present invention can effectively reduce the number of fans and reduce the equipment investment cost by merging the fan systems of zones A, B and C as well as zones Ret and F. At the same time, the fans are highly integrated, avoiding the situation of fan dispersion and numerous control points, which is beneficial to the operation and stability of production. At the same time, it can meet the mutual allocation of air volume in each area, ensure the air volume required for glass annealing, thereby improving the annealing quality of glass and the glass yield.

Description

Technical Field

[0001] The invention relates to the technical field of glass annealing furnaces, and in particular to a cooling system for A zone, B zone, C zone, Ret zone and F zone of an annealing furnace. Background Art

[0002] The general process flow of a flat glass production line is: batching-melting-forming-annealing-cutting-stacking. Among them, the annealing stage is completed in an annealing furnace of a certain length after the glass is formed. The glass plate belt is driven by the rotating annealing roller and slowly passes through the annealing furnace at a certain speed. The glass is cooled and cooled in the process of passing through the annealing furnace. The cooling process can be divided into multiple areas according to the process requirements. Each area is cooled at a different cooling rate according to the requirements. Finally, the glass belt passing through the annealing furnace eliminates the internal stress of the glass, meets the cutting stress requirements of the subsequent cold end process, and ensures the stress required for the internal structural strength of the glass.

[0003] At present, annealing furnaces can usually be divided into multiple areas such as A zone, B zone, C zone, D zone, Ret zone, E zone, and F zone. Among them, A zone, B zone, and C zone are insulation zones, D zone is a transition zone, Ret zone is a sealed zone, and E zone and F zone are open zones. Each zone is equipped with fans, corresponding air ducts, and butterfly valves to control the cooling rate and intensity according to the cooling requirements. During the cooling process, appropriate heating and insulation measures are also required to ensure that the glass ribbon is cooled according to the cooling rate required by different areas, so as to avoid cracking, warping, etc. of the glass plate during the annealing and cooling process, resulting in glass breakage and reduced yield. Therefore, the cooling air system of each zone of the entire annealing furnace is equipped with a large number of fans according to needs. Especially in actual production, since the cooling air systems of each zone are independent and not interconnected, it is impossible to achieve reasonable interconnection and allocation. At the same time, the number of equipment configurations is large and the utilization rate is low, resulting in a large waste of energy.

[0004] In order to meet the air volume requirements of each area, a larger power fan can be selected, but it will increase investment and later operating energy consumption. In addition, due to the long annealing kiln, the fan layout is scattered and the air duct layout is complicated, which makes maintenance and operation more difficult. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a cooling system for annealing furnace A zone, B zone, C zone, Ret zone and F zone. The A zone, B zone and C zone share a set of fan system, and the Ret zone and F zone share a set of fan system, which can reduce the number of fans, and the fans are highly integrated, avoiding the situation of fan dispersion and numerous control points, which is beneficial to the operation and stability of production.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The present invention provides a cooling system for zones A, B, C, Ret and F of an annealing furnace, comprising a cooling device for zone A, a cooling device for zone B, a cooling device for zone C, a cooling device for zone Ret, a cooling device for zone F, a fan air outlet system and a fan air inlet system.

[0008] Preferably, the zone A cooling device comprises: a plurality of zone A upper cooling air ducts, a plurality of zone A lower cooling air ducts, a first collecting air duct connected to the air outlets of each zone A upper cooling air duct, and a second collecting air duct connected to the air outlets of each zone A lower cooling air duct.

[0009] Preferably, the B zone cooling device comprises: a plurality of upper cooling air ducts in the B zone, a plurality of lower cooling air ducts in the B zone, a first collecting air outlet duct connected to the air outlets of the upper cooling air ducts in the B zone, and a third collecting air duct connected to the air outlets of the lower cooling air ducts in the B zone.

[0010] Preferably, the C zone cooling device includes: a plurality of upper cooling air ducts of the C zone, a plurality of lower cooling air ducts of the C zone, a fourth collecting air duct connected to the air outlets of the upper cooling air ducts of each C zone, and a fifth collecting air duct connected to the air outlets of the lower cooling air ducts of each A zone.

[0011] Preferably, the fan air outlet system is used to control the air volume in area A, area B and area C, and includes a first fan, a second fan, a second collecting air outlet duct, a first collecting main air duct and a first collecting main air outlet duct;

[0012] Preferably, the air outlet of the first collecting air duct is connected with the air inlet of the second collecting air outlet duct, the air outlets of the second collecting air duct and the third collecting air duct are respectively connected with the air inlet of the first collecting air outlet duct, the air outlet of the first collecting air outlet duct, the air outlet of the second collecting air outlet duct, the air outlet of the fourth collecting air duct and the air outlet of the fifth collecting air duct are respectively connected with the air inlet of the first collecting main air duct, the air outlet of the first collecting main air duct is respectively connected with the air inlet of the first fan and the air inlet of the second fan, the air outlet of the first fan and the air outlet of the second fan are respectively connected with the air inlet of the first collecting main air outlet duct, and the air outlet of the first collecting main air outlet duct is connected to the atmosphere.

[0013] Preferably, the Ret zone cooling device includes: a plurality of Ret zone upper cooling air ducts, a plurality of Ret zone lower cooling air ducts, a first upper air duct connected to the air inlet of each Ret zone upper cooling air duct, a first lower air duct connected to the air inlet of each Ret zone lower cooling air duct, and a first collecting air inlet duct connected to the air inlet of the first upper air duct and the air inlet of the first lower air duct.

[0014] Preferably, the F zone cooling device includes: a plurality of F zone upper cooling air ducts, a plurality of F zone lower cooling air ducts, a second upper air duct connected to the air inlet of each F zone upper cooling air duct, a second lower air duct connected to the air inlet of each F zone lower cooling air duct, and a first branch air duct connected to the air inlet of the second upper air duct and the air inlet of the second lower air duct.

[0015] Preferably, the fan air inlet system is used to control the air volume in the Ret zone and the F zone, and includes a third fan, a fourth fan, a second collecting air inlet duct, a second branch air duct and a third branch air duct.

[0016] Preferably, the air inlet of the second collecting air inlet duct is respectively connected with the air outlets of the third fan and the fourth fan, the air inlets of the first branch air duct and the second branch air duct are respectively connected with the air outlet of the second collecting air inlet duct, the air inlet of the third branch air duct is connected with the air outlet of the first collecting total air outlet duct, and the air outlet of the second branch air duct and the air outlet of the third branch air duct are connected to the air inlet of the first collecting air inlet duct after merging.

[0017] Preferably, the first fan and the second fan are respectively mounted on the housing of the B zone cooling device.

[0018] Preferably, the plurality of upper cooling air ducts in zone A and the plurality of lower cooling air ducts in zone A are horizontally distributed.

[0019] Preferably, the plurality of upper cooling air ducts in zone B and the plurality of lower cooling air ducts in zone B are horizontally distributed.

[0020] Preferably, a plurality of upper cooling air ducts in zone C and a plurality of lower cooling air ducts in zone C are horizontally distributed.

[0021] Preferably, the plurality of Ret zone upper cooling air ducts and the plurality of Ret zone lower cooling air ducts are horizontally distributed.

[0022] Preferably, the plurality of upper cooling air ducts of zone F and the plurality of lower cooling air ducts of zone F are horizontally distributed.

[0023] Preferably, the plurality of upper cooling air ducts in zone A and the plurality of lower cooling air ducts in zone A are respectively provided with control valves.

[0024] Preferably, the plurality of upper cooling air ducts in zone B and the plurality of lower cooling air ducts in zone B are respectively provided with control valves.

[0025] Preferably, the plurality of upper cooling air ducts in zone C and the plurality of lower cooling air ducts in zone B are respectively provided with control valves.

[0026] Preferably, control valves are respectively provided on the plurality of Ret zone upper cooling air ducts and the plurality of Ret zone lower cooling air ducts.

[0027] Preferably, control valves are respectively provided on the plurality of upper cooling air ducts of the F zone and the plurality of lower cooling air ducts of the F zone.

[0028] Preferably, the first air outlet converging pipe and the second air outlet converging pipe are respectively provided with control valves.

[0029] Preferably, the air inlet and the air outlet of the first fan are respectively provided with control valves.

[0030] Preferably, the air inlet and the air outlet of the second fan are respectively provided with control valves.

[0031] Preferably, the second branch air duct, the third branch air duct and the second collecting air duct are provided with control valves.

[0032] Preferably, the air inlet and the air outlet of the third fan are respectively provided with control valves.

[0033] Preferably, the air inlet and the air outlet of the fourth fan are respectively provided with control valves.

[0034] Preferably, the control valve is a manual control valve or an automatic control valve.

[0035] Preferably, the cooling device in zone A, the cooling device in zone B and the cooling device in zone C further include temperature measuring elements.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] (1) In the cooling system of the annealing furnace provided by the present invention, the A zone, the B zone, and the C zone share a set of fan systems, and the Ret zone and the F zone share a set of fan systems, which can effectively reduce the number of fans and reduce the equipment investment cost. At the same time, the fans are highly integrated, avoiding the situation of fan dispersion and numerous control points in the prior art, which is conducive to the operation and stability of production;

[0038] (2) The present invention, on the basis of simplifying the cooling air system, can meet the mutual coordination of air volumes in various areas, ensure the air volume required for glass annealing, and thus improve the annealing quality of the glass and the glass yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the cooling system of the annealing furnace A zone, B zone, C zone, Ret zone and F zone;

[0040] Among them, 1 is the upper cooling air duct of zone A, 2 is the lower cooling air duct of zone A, 3 is the first collecting air duct, 4 is the second collecting air duct, 5 is the upper cooling air duct of zone B, 6 is the lower cooling air duct of zone B, 7 is the third collecting air duct, 8 is the control valve, 9 is the first collecting air outlet duct, 10 is the second collecting air outlet duct, 11 is the first collecting main air duct, 12 is the first fan, 13 is the second fan, 14 is the first collecting main air outlet duct, 15 is the upper cooling air duct of zone C, 16 is the lower cooling air duct of zone C, 17 is the first There are four collecting air ducts, 18 is the fifth collecting air duct, 19 is the upper cooling air duct of Ret zone, 20 is the lower cooling air duct of Ret zone, 21 is the first upper air duct, 22 is the first lower air duct, 23 is the upper cooling air duct of F zone, 24 is the lower cooling air duct of F zone, 25 is the second upper air duct, 26 is the second lower air duct, 27 is the first branch air duct, 28 is the second branch air duct, 29 is the third branch air duct, 30 is the first collecting air inlet duct, 31 is the second collecting air inlet duct, 32 is the third fan, and 33 is the fourth fan. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. 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.

[0042] In view of the problem that the glass annealing furnace in the prior art has a large number of fans and is difficult to control, the present invention provides a cooling system for zones A, B, C, Ret and F of the annealing furnace, comprising: a cooling device for zone A, a cooling device for zone B, a cooling device for zone C, a cooling device for zone Ret, a cooling device for zone F, a fan air outlet system and a fan air inlet system.

[0043] Among them, the cooling device of zone A includes: a plurality of upper cooling air ducts 1 of zone A, a plurality of lower cooling air ducts 2 of zone A, a first collecting air duct 3 connected to the air outlets of the upper cooling air ducts of each zone A, and a second collecting air duct 4 connected to the air outlets of the lower cooling air ducts of each zone A.

[0044] The B zone cooling device includes: a plurality of upper cooling air ducts 5 of the B zone, a plurality of lower cooling air ducts 6 of the B zone, a first collecting air outlet duct 9 connected to the air outlets of the upper cooling air ducts of the B zone, and a third collecting air duct 7 connected to the air outlets of the lower cooling air ducts of the B zone.

[0045] The C zone cooling device includes: a plurality of C zone upper cooling air ducts 15, a plurality of C zone lower cooling air ducts 16, a fourth collecting air duct 17 connected to the air outlets of each C zone upper cooling air duct, and a fifth collecting air duct 18 connected to the air outlets of each A zone lower cooling air duct.

[0046] The fan air outlet system is used to control the air volume in area A, area B and area C, and includes a first fan 12 , a second fan 13 , a second collecting air outlet duct 10 , a first collecting main air duct 11 and a first collecting main air outlet duct 14 .

[0047] In the present invention, the air outlet of the first collecting air duct 3 is connected with the air inlet of the second collecting air outlet duct 10, the air outlets of the second collecting air duct 4 and the third collecting air duct 7 are respectively connected with the air inlet of the first collecting air outlet duct 9, the air outlet of the first collecting air outlet duct 9, the air outlet of the second collecting air outlet duct 10, the air outlet of the fourth collecting air duct 17 and the air outlet of the fifth collecting air duct 18 are respectively connected with the air inlet of the first collecting main air duct 11, the air outlet of the first collecting main air duct 11 is respectively connected with the air inlet of the first fan 12 and the air inlet of the second fan 13, the air outlet of the first fan 12 and the air outlet of the second fan 13 are respectively connected with the air inlet of the first collecting main air outlet duct 14, a part of the air outlet of the first collecting main air outlet duct 14 is connected with the atmosphere, and the other part is introduced into the Ret zone as a source of hot air in the Ret zone.

[0048] In order to achieve effective radiation cooling and reduce the temperature of the glass surface, the plurality of upper cooling ducts 1 in zone A, the plurality of lower cooling ducts 2 in zone A, the plurality of upper cooling ducts 5 in zone B, the plurality of lower cooling ducts 6 in zone B, the plurality of upper cooling ducts 15 in zone C and the plurality of lower cooling ducts 16 in zone B are all horizontally distributed. The present invention has no particular restrictions on the number and shape of the cooling ducts, which can be selected according to actual needs (the shape can be a circular tube or a rectangular parallelepiped). At the same time, in order to facilitate the regulation of the air volume in each area according to actual production needs, the plurality of upper cooling ducts 1 in zone A, the plurality of lower cooling ducts 2 in zone A, the plurality of upper cooling ducts 5 in zone B, the plurality of lower cooling ducts 6 in zone B, the plurality of upper cooling ducts 15 in zone C and the plurality of lower cooling ducts 16 in zone B are respectively provided with control valves 8. The first collecting outlet duct 9, the second collecting outlet duct 10, the air inlet and outlet of the first fan 12, and the air inlet and outlet of the second fan 13 are also respectively provided with control valves 8. The control valve 8 can be manually controlled or automatically controlled, and the opening of the valve can be automatically or manually controlled to effectively control the air volume.

[0049] In some specific embodiments of the present invention, the cooling device in zone A, the cooling device in zone B and the cooling device in zone C further include a temperature measuring element, and the temperature measuring element includes an infrared instrument and a thermocouple. The present invention has no particular restriction on the number of infrared instruments and thermocouples, and they can be set according to actual production needs. In the present invention, the cooling device in zone A, the cooling device in zone B and the cooling device in zone C preferably also include a temperature DCS control system for monitoring the ambient temperature of zones A, B and C.

[0050] Since the annealing furnace A, B, and C zones are the early stages of the annealing furnace, the purpose of their fans is to extract the hot air in the area, so the present invention merges the fan systems of the annealing furnace A, B, and C zones, which can be merged from 6 units (3 for use and 3 for standby) to 2 units (1 for use and 1 for standby), which can effectively reduce the number of fans. At the same time, the first fan 12 and the second fan 13 after the merger of the A, B, and C zones are both installed on the housing of the B zone (the first fan and the second fan are in a "one for use and one for standby" relationship, and in actual production applications, only one fan needs to be turned on), which can take into account the A and C zones, and at the same time facilitate the arrangement of the air duct and avoid the air duct line being too complicated.

[0051] In the present invention, the Ret zone cooling device includes: a plurality of Ret zone upper cooling air ducts 19, a plurality of Ret zone lower cooling air ducts 20, a first upper air duct 21 connected to the air inlet of each Ret zone upper cooling air duct, a first lower air duct 22 connected to the air inlet of each Ret zone lower cooling air duct, and a first collecting air inlet duct 30 connected to the air inlet of the first upper air duct and the air inlet of the first lower air duct.

[0052] The F zone cooling device includes: a plurality of F zone upper cooling air ducts 23, a plurality of F zone lower cooling air ducts 24, a second upper air duct 25 connected to the air inlet of each F zone upper cooling air duct, a second lower air duct 26 connected to the air inlet of each F zone lower cooling air duct, and a first branch air duct 27 connected to the air inlet of the second upper air duct and the air inlet of the second lower air duct.

[0053] The fan air intake system is used to control the air volume in the Ret zone and the F zone, and includes a third fan 32 , a fourth fan 33 , a second collecting air intake duct 31 , a second branch air duct 28 and a third branch air duct 29 .

[0054] Among them, the air inlet of the second collecting air inlet duct 31 is connected with the air outlet of the third fan 32 and the fourth fan 33 respectively, the air inlets of the first branch air duct 27 and the second branch air duct 28 are connected with the air outlet of the second collecting air inlet duct 31 respectively, the air inlet of the third branch air duct 29 is connected with the air outlet of the first collecting main air outlet duct 14, and the air outlet of the second branch air duct 28 and the air outlet of the third branch air duct 29 are connected with the air inlet of the first collecting air inlet duct 30 after merging.

[0055] In the present invention, the plurality of upper cooling ducts 19 of the Ret zone, the plurality of lower cooling ducts 20 of the Ret zone, the plurality of upper cooling ducts 23 of the F zone and the plurality of lower cooling ducts 24 of the F zone are all horizontally distributed. The present invention has no particular restrictions on the number and shape of the cooling ducts, which can be selected according to actual needs (the shape can be a circular tube or a rectangular parallelepiped). At the same time, in order to facilitate the regulation of the air volume of each area according to actual production needs, the plurality of upper cooling ducts 19 of the Ret zone, the plurality of lower cooling ducts 20 of the Ret zone, the plurality of upper cooling ducts 23 of the F zone and the plurality of lower cooling ducts 24 of the F zone are respectively provided with control valves 8. The second branch duct 28, the third branch duct 29, the second collecting duct 31, the air inlet and outlet of the third fan 32, and the air inlet and outlet of the fourth fan 33 are also respectively provided with control valves 8. As described in the above technical solution, the control valve 8 can be manually controlled or automatically controlled, and the opening of the valve 8 can be automatically or manually controlled to effectively control the air volume. In some embodiments of the present invention, in order to better control the wind temperature in the Ret zone, thermocouples are respectively provided on the third branch air duct 29 and at the air outlet of the first collecting air inlet duct 30 for temperature measurement.

[0056] Since the fans set in the Ret zone and the F zone are mainly used to blow room temperature air to the surface of the glass plate. Therefore, the present invention merges the fans in the Ret zone and the F zone. The Ret zone can generally include sub-zones such as Retl and Ret2, and the F zone can generally include sub-zones such as F1 and F2. At present, the fan configuration of these two zones is 1 fan per sub-zone, and there is no spare fan. After merging into 2 fans (1 for use and 1 for spare), the number of fans can be effectively reduced. It should be noted that the number of sub-zones in the Ret zone and the F zone can be 1, 2, 3 or more, which can be set according to actual production needs. In the present invention, the third fan 32 and the fourth fan 33 after the Ret zone and the F zone are merged can be installed on the ground relatively close to the Ret zone and the F zone, or one fan is installed on the Ret zone housing, and the other fan is installed on the F zone housing, which can be selected according to the air duct layout on site.

[0057] The structural schematic diagram of the annealing furnace A zone, B zone, C zone, Ret zone and F zone is as follows Figure 1As shown, 1 is the upper cooling air duct of zone A, 2 is the lower cooling air duct of zone A, 3 is the first collecting air duct, 4 is the second collecting air duct, 5 is the upper cooling air duct of zone B, 6 is the lower cooling air duct of zone B, 7 is the third collecting air duct, 8 is the control valve, 9 is the first collecting air outlet duct, 10 is the second collecting air outlet duct, 11 is the first collecting main air duct, 12 is the first fan, 13 is the second fan, 14 is the first collecting main air outlet duct, 15 is the upper cooling air duct of zone C, 16 is the lower cooling air duct of zone C, 17 is the first There are four collecting air ducts, 18 is the fifth collecting air duct, 19 is the upper cooling air duct of the Ret zone, 20 is the lower cooling air duct of the Ret zone, 21 is the first upper air duct, 22 is the first lower air duct, 23 is the upper cooling air duct of the F zone, 24 is the lower cooling air duct of the F zone, 25 is the second upper air duct, 26 is the second lower air duct, 27 is the first branch air duct, 28 is the second branch air duct, 29 is the third branch air duct, 30 is the first collecting air inlet duct, 31 is the second collecting air inlet duct, 32 is the third fan, and 33 is the fourth fan. It should be noted that for simplicity, Figure 1 The D and E zones are not shown in the figure, but in actual production, the D zone is between the C zone and the Ret zone, and the E zone is between the Ret zone and the F zone.

[0058] In order to further illustrate the present invention, the present invention takes a 700 tons / day float glass production line, a 1000 tons / day float glass production line, a 650 tons / day photovoltaic rolled glass production line and a 1200 tons / day photovoltaic rolled glass production line as examples, and statistically analyzes the equipment configurations before and after the fans are combined in the above different production lines. The results are shown in Tables 1 to 4 below:

[0059] Table 1 Fan configuration table for 700 tons / day float glass production line annealing furnace

[0060]

[0061]

[0062] Table 21000 tons / day float glass production line annealing furnace fan configuration table

[0063]

[0064] Table 3650 tons / day photovoltaic rolled glass production line annealing kiln fan configuration table

[0065]

[0066]

[0067] Table 4 Fan configuration of 1200 tons / day photovoltaic rolled glass production line annealing kiln

[0068]

[0069] The number of fans of annealing furnaces of different glass production lines in Tables 1 to 4 before and after merging is counted, and the results are shown in Table 5:

[0070] Table 5 Statistics of fans quantity of annealing furnaces in different glass production lines in Tables 1 to 4

[0071]

[0072] From the data in Tables 1 to 5, it can be seen that when the fans in the cooling systems of Zones A, B, C, Ret and F of the annealing furnace are combined, the number of fans can be greatly reduced, and the equipment investment cost can be reduced. At the same time, the fans are highly integrated, avoiding the situation of scattered fans and numerous control points in the prior art, which is conducive to the operation and stability of production, and can meet the mutual allocation of air volume in each area, ensuring the air volume required for glass annealing, thereby further improving the annealing quality of glass and the glass yield rate.

[0073] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling system for zones A, B, C, Ret and F of an annealing furnace, characterized in that: include: A zone cooling device, B zone cooling device, C zone cooling device, Ret zone cooling device, F zone cooling device, fan air outlet system and fan air inlet system; The A zone cooling device comprises: a plurality of upper cooling air ducts of the A zone, a plurality of lower cooling air ducts of the A zone, a first collecting air duct connected to the air outlets of the upper cooling air ducts of each A zone, and a second collecting air duct connected to the air outlets of the lower cooling air ducts of each A zone; The B zone cooling device comprises: a plurality of upper cooling air ducts of the B zone, a plurality of lower cooling air ducts of the B zone, a first collecting air outlet duct connected to the air outlets of the upper cooling air ducts of the B zone, and a third collecting air duct connected to the air outlets of the lower cooling air ducts of the B zone; The C zone cooling device comprises: a plurality of C zone upper cooling air ducts, a plurality of C zone lower cooling air ducts, a fourth collecting air duct connected to the air outlets of the C zone upper cooling air ducts, and a fifth collecting air duct connected to the air outlets of the A zone lower cooling air ducts; The fan air outlet system is used to control the air volume in area A, area B and area C, and includes a first fan, a second fan, a second collecting air outlet duct, a first collecting main air duct and a first collecting main air outlet duct; The air outlet of the first collecting air duct is connected with the air inlet of the second collecting air outlet duct, the air outlets of the second collecting air duct and the third collecting air duct are respectively connected with the air inlet of the first collecting air outlet duct, the air outlet of the first collecting air outlet duct, the air outlet of the second collecting air outlet duct, the air outlet of the fourth collecting air duct and the air outlet of the fifth collecting air duct are respectively connected with the air inlet of the first collecting main air duct, the air outlet of the first collecting main air duct is respectively connected with the air inlet of the first fan and the air inlet of the second fan, the air outlet of the first fan and the air outlet of the second fan are respectively connected with the air inlet of the first collecting main air outlet duct, and the air outlet of the first collecting main air outlet duct is connected with the atmosphere; The Ret zone cooling device comprises: a plurality of Ret zone upper cooling air ducts, a plurality of Ret zone lower cooling air ducts, a first upper air duct connected to the air inlet of each Ret zone upper cooling air duct, a first lower air duct connected to the air inlet of each Ret zone lower cooling air duct, and a first collecting air inlet duct connected to the air inlet of the first upper air duct and the air inlet of the first lower air duct; The F zone cooling device comprises: a plurality of F zone upper cooling air ducts, a plurality of F zone lower cooling air ducts, a second upper air duct connected to the air inlet of each F zone upper cooling air duct, a second lower air duct connected to the air inlet of each F zone lower cooling air duct, and a first branch air duct connected to the air inlet of the second upper air duct and the air inlet of the second lower air duct; The fan air intake system is used to control the air volume in the Ret zone and the F zone, and includes a third fan, a fourth fan, a second collecting air intake pipe, a second branch air pipe and a third branch air pipe; The air inlet of the second collecting air inlet duct is connected with the air outlets of the third fan and the fourth fan respectively, the air inlets of the first branch air duct and the second branch air duct are connected with the air outlet of the second collecting air inlet duct respectively, the air inlet of the third branch air duct is connected with the air outlet of the first collecting total air outlet duct, and the air outlet of the second branch air duct is connected with the air inlet of the first collecting air inlet duct after merging with the air outlet of the third branch air duct.

2. The cooling system according to claim 1, characterized in that: The first fan and the second fan are respectively mounted on the housing of the B zone cooling device.

3. The cooling system according to claim 1, characterized in that: The plurality of upper cooling air ducts in zone A and the plurality of lower cooling air ducts in zone A are horizontally distributed; The plurality of upper cooling air ducts in zone B and the plurality of lower cooling air ducts in zone B are horizontally distributed; The plurality of upper cooling air ducts in zone C and the plurality of lower cooling air ducts in zone C are horizontally distributed.

4. The cooling system according to claim 1, characterized in that: The plurality of upper cooling air ducts of the Ret zone and the plurality of lower cooling air ducts of the Ret zone are horizontally distributed; The plurality of upper cooling air ducts of zone F and the plurality of lower cooling air ducts of zone F are distributed horizontally.

5. The cooling system according to claim 1, characterized in that: The plurality of upper cooling air ducts in zone A and the plurality of lower cooling air ducts in zone A are respectively provided with control valves; The plurality of upper cooling air ducts in zone B and the plurality of lower cooling air ducts in zone B are respectively provided with control valves; The plurality of upper cooling air ducts in zone C and the plurality of lower cooling air ducts in zone B are respectively provided with control valves.

6. The cooling system according to claim 1, characterized in that: The plurality of upper cooling air ducts of the Ret zones and the plurality of lower cooling air ducts of the Ret zones are respectively provided with control valves; The plurality of upper cooling air ducts of the F zone and the plurality of lower cooling air ducts of the F zone are respectively provided with control valves.

7. The cooling system according to claim 1, characterized in that: The first air collecting pipe and the second air collecting pipe are respectively provided with control valves; The air inlet and the air outlet of the first fan are respectively provided with control valves; The air inlet and the air outlet of the second fan are respectively provided with control valves.

8. The cooling system according to claim 1, characterized in that: The second branch air duct, the third branch air duct and the second collecting air duct are provided with control valves; The air inlet and the air outlet of the third fan are respectively provided with control valves; The air inlet and the air outlet of the fourth fan are respectively provided with control valves.

9. The cooling system according to any one of claims 5 to 8, characterized in that: The control valve is a manual control valve or an automatic control valve.

10. The cooling system according to claim 1, characterized in that The A zone cooling device, the B zone cooling device and the C zone cooling device also include temperature measuring elements.

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