An air supply device with double fans connected in series and precise air control

Abstract

The present invention discloses an air supply device with double fans connected in series and precise air control, wherein the air collecting chamber of the air box body and the air outlet of the second fan assembly are connected through an air inlet pipe; the second fan assembly comprises an independent fan, a series air duct and a damper device, the air outlets of multiple independent fans are connected through the series air duct, and the air outlet of the series air duct is the air outlet of the second fan assembly; the side wall of the series air duct is provided with an adjustment opening, and the series air duct is connected with the outside through the adjustment opening; the adjustment opening is fixedly connected with a damper device; the damper device comprises an adjustment plate unit, a mounting seat and a clamping cylinder; a shielding assembly is fixedly connected in the mounting seat, the adjustment plate unit is provided with an adjustment connection hole, the central axis of the adjustment plate unit passes through the adjustment connection hole, and the connecting shaft of the clamping cylinder is fixed to the adjustment connection hole. The present invention solves the problem that the damper of the air duct for adjusting the air pressure of the existing air supply device may leak air, thereby affecting the accuracy of adjusting the air pressure.

Description

Technical Field

[0001] The invention relates to the technical field of glass tempering, and in particular to an air supply device with dual fans connected in series for precise air control. Background Art

[0002] The air supply device includes a fan, an air duct and an air collecting box. After the fan works to form high-pressure cold air, the high-pressure cold air is sent to the air collecting box through the air duct. The air collecting box evenly distributes the high-pressure cold air to its own air outlets, and then blows it to the glass heated by the tempered glass furnace through the wind grid. The thickness of tempered glass for different purposes is different. When cooling the glass, the thicker the glass, the slower the cooling speed. Therefore, the air pressure needs to be adjusted according to the thickness of the glass.

[0003] In the prior art, the upper limit of wind pressure is usually increased by connecting fans in series, and a duct damper is set between two fans in series to adjust the wind pressure. The existing duct dampers are generally plug-in dampers, which are set perpendicular to the duct. When the duct damper is pulled away from the inside of the duct, the duct damper is opened, and when the duct damper is inserted into the duct, the duct damper is closed. However, the duct damper of this structure is not airtight enough. Even if the duct damper is closed, there is a gap between the movable cover of the duct damper and the guide rails on both sides, which makes it difficult to ensure the airtightness of the damper, and there will be air leakage, thereby affecting the accuracy of adjusting the wind pressure. Summary of the invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to propose an air supply device with dual fans connected in series for precise air control, which solves the problem that the air duct damper for adjusting the air pressure in the existing air supply device may leak air, thereby affecting the accuracy of adjusting the air pressure.

[0005] To achieve this object, the present invention adopts the following technical scheme: an air supply device with dual fans in series and precise air control, comprising an air collecting box and a second fan assembly, the air collecting box comprising an air box body and an air inlet duct, the air collecting chamber of the air box body and the air outlet of the second fan assembly are connected via the air inlet duct; the second fan assembly comprises an independent fan, a series air duct and a gate device, a plurality of the independent fans are connected in series via the series air duct; an adjustment opening is provided on the side wall of the series air duct, and the series air duct is connected to the outside through the adjustment opening; the gate device is fixedly connected to the adjustment opening; the gate device comprises an adjustment plate unit, a mounting seat and a clamping cylinder, the mounting seat is a cylindrical tube body structure, the mounting seat is fixedly connected to the tube wall of the series air duct, the adjustment plate unit is arranged in the mounting seat and the central axis of the adjustment plate unit coincides with the central axis of the mounting seat; the mounting seat A shielding assembly is fixedly connected in the mounting seat, and the shielding assembly is parallel to the adjustment plate unit, and the sum of the areas of the shielding assembly and the adjustment plate unit is greater than or equal to the cross-sectional area of ​​the mounting seat; the adjustment plate unit is provided with an adjustment connecting hole, the central axis of the adjustment plate unit passes through the adjustment connecting hole, and the connecting shaft of the clamping cylinder is fixed to the adjustment connecting hole; when the gate device is closed to close the adjustment opening, the clamping cylinder drives the adjustment plate unit to rotate with its own central axis as the rotating axis and moves in the direction close to the shielding assembly, and the adjustment plate unit and the shielding assembly jointly cover the mounting seat; when the gate device is opened to open the adjustment opening, the clamping cylinder drives the adjustment plate unit to rotate with its own central axis as the rotating axis and moves in the direction away from the shielding assembly, and the adjustment plate unit and the shielding assembly partially or completely overlap.

[0006] It is worth mentioning that it also includes a first fan assembly; the air collecting chamber of the wind box body is divided into a passing section cold air chamber and a cooling section cold air chamber, a gate valve is provided between the passing section cold air chamber and the cooling section cold air chamber, the opening and closing of the gate valve controls the connection or closing of the passing section cold air chamber and the cooling section cold air chamber; the air inlet pipe is divided into a passing section air inlet duct and a cooling section air inlet duct, the passing section air inlet duct and the cooling section air inlet duct are both installed on the rear side of the wind box body, the front end of the passing section air inlet duct is connected with the rear end of the passing section cold air chamber, the front end of the cooling section air inlet duct is connected with the rear end of the cooling section cold air chamber, the rear end of the passing section air inlet duct is connected with the air outlet of the second fan assembly, and the rear end of the cooling section air inlet duct is connected with the air outlet of the first fan assembly.

[0007] Optionally, the adjustment plate unit is provided with a first slot, and the shielding assembly is provided with a second slot, and when the gate device is fully opened, the first slot is aligned with the second slot; the first slot divides the adjustment plate unit into an adjustment connection portion, a plurality of fan-shaped portions and a plurality of first arc portions, the vertex sides of all the fan-shaped portions are connected through the adjustment connection portion, and the arc sides of two adjacent fan-shaped portions are connected through the first arc portion, the adjustment connection portion is arranged on the central axis of the mounting seat, and the adjustment connection hole is arranged in the adjustment connection portion.

[0008] Specifically, the shielding assembly is provided with a plurality of second grooves, and the second grooves divide the shielding assembly into a shielding connection portion, a plurality of fan-shaped portions and a plurality of second arc portions, the arc side of the fan-shaped portion is fixedly connected to the inner wall of the mounting seat, the vertex sides of all the fan-shaped portions are connected through the shielding connection portion, and the arc sides of two adjacent fan-shaped portions are connected through the second arc portion, and the second arc portion is fixedly connected to the inner wall of the mounting seat; the shielding connection portion is arranged on the central axis of the mounting seat, and the shielding connection portion is provided with a shielding connection hole, and the connecting shaft of the clamping cylinder passes through the shielding connection hole and rotates in the shielding connection hole.

[0009] Preferably, the fan-shaped portions are arranged at intervals in the mounting seat, the fan-shaped portions are arranged at intervals in the mounting seat, and the number of the fan-shaped portions is equal to the number of the fan-shaped portions; when the gate device is closed, the fan-shaped portions and the fan-shaped portions are staggered.

[0010] It is worth noting that the gate valve includes a connecting channel, an upper cylinder, a lower cylinder, an upper gate plate and a lower gate plate; the connecting channel is installed on a partition between the cold air cavity of the passing section and the cold air cavity of the cooling section, and the cold air cavity of the passing section and the cold air cavity of the cooling section are connected through the connecting channel; the upper cylinder and the lower cylinder are respectively installed on the top surface and the bottom surface of the connecting channel; the lower end of the upper gate plate passes through the upper side wall of the connecting channel and is inserted into the connecting channel, and the upper end of the lower gate plate passes through the lower side wall of the connecting channel. The wall is inserted into the connecting channel, the upper end of the upper gate plate is transmission connected to the output end of the upper cylinder, and the lower end of the lower gate plate is transmission connected to the output end of the lower cylinder; the upper cylinder drives the upper gate plate to move up and down, and the lower cylinder drives the lower gate plate to move up and down, the lower gate plate and the upper gate plate are arranged in a front-to-back manner, and when the upper gate plate slides to the maximum stroke, the upper gate plate completely covers the connecting channel, and when the lower gate plate slides to the maximum stroke, the lower gate plate covers a partial area of ​​the connecting channel.

[0011] Optionally, the end edge of the lower end of the upper gate plate is in the shape of an arc protruding toward the center direction of the connecting channel; the end edge of the upper end of the lower gate plate is in the shape of an arc protruding toward the center direction of the connecting channel.

[0012] Specifically, the gate valve also includes a plurality of guide plate assemblies; a guide groove is provided in the guide plate assembly, and the plurality of guide plate assemblies are grouped in pairs and symmetrically installed on the front and rear sides of the partition respectively, and the guide plate assemblies are distributed on the upper and lower sides of the connecting channel; the upper gate plate and the lower gate plate slide along the corresponding guide grooves of the guide plate assemblies.

[0013] Preferably, the front ends of the through-section cold air cavity and the cooling-section cold air cavity are both connected to a plurality of air outlet ducts distributed in an array, the through-section cold air cavity supplies air to the through-section of the glass tempering furnace through the air outlet duct, and the cooling-section cold air cavity supplies air to the cooling section of the glass tempering furnace through the air outlet duct; the front ends of the through-section cold air cavity and the cooling-section cold air cavity are respectively equipped with the cold air regulating device, the cold air regulating device comprises a lifting mechanism and a wind shield plate, the wind shield plate is transmission-connected to the lifting mechanism, the lifting mechanism drives the wind shield plate to move up and down, and the wind shield plate blocks a row of the outlet ducts or the area between the upper and lower rows of the outlet ducts when moving up and down.

[0014] It is worth mentioning that the cold air regulating device also includes a driving motor, which is installed on the outside of the bellows body; the lifting mechanism also includes a rotating wheel, a transmission chain and a connecting rod; the connecting rod is installed below the wind shield, and one end of the connecting rod is transmission-connected to the output end of the driving motor; the multiple rotating wheels are divided into two groups, the first group of rotating wheels are arranged at intervals and mounted on the connecting rod, the second group of rotating wheels are installed above the wind shield, and the second group of rotating wheels are arranged one-to-one with the first group of rotating wheels separated by the wind shield; every two upper and lower corresponding rotating wheels are mounted with the transmission chain, and the transmission chain is connected to the rear side of the wind shield; the driving motor drives the rotating wheel to rotate forward and reverse through the connecting rod, thereby driving the transmission chain to move up and down, and then driving the wind shield to move up and down synchronously.

[0015] One of the above technical solutions has the following beneficial effects:

[0016] 1. During operation, the air outlet of the second fan assembly is connected to the air inlet pipe of the air collecting box, and the gate device is used to adjust the opening of the adjustment opening, thereby adjusting the wind pressure at the air outlet of the series air duct, thereby achieving the purpose of indirectly controlling the air outlet pressure of the air collecting box. When making thin glass, the gate device is closed, and all independent fans work at the same time. The first independent fan blows air into the next independent fan, and finally the last independent fan blows air into the air collecting box. When multiple fans are used in series, the total output air pressure is the superposition of the wind pressures of multiple independent fans. The wind pressure is increased to speed up the tempering rate, so that the thin glass meets the tempering requirements. When making thick glass, only the independent fan closest to the air inlet pipe needs to be turned on. At this time, the gate device is opened, and the wind from the external environment enters the independent fan from the gate device, thereby achieving the purpose of energy saving. The cold air blown by the fan enters the air collecting cavity in the air box from the air inlet pipe, and after the wind pressure is evenly distributed in the air collecting cavity, the cold air is blown from the air outlet duct of the air collecting box to the wind grille, and then blown to the hot glass through the wind grille, thereby cooling the glass.

[0017] 2. When the adjustment plate unit rotates and the gate device is closed, the adjustment opening is closed and the adjustment plate unit moves toward the shielding assembly. When the gate device is completely closed, the adjustment plate unit moves toward the shielding assembly, which avoids a gap between the adjustment plate unit and the shielding assembly, improves the air tightness of the gate device, and avoids the inaccurate adjustment of the wind pressure of the air collecting box due to air leakage from the gate device, thereby improving the accuracy of the adjustment of the wind pressure of the air supply device. In addition, the gate device adopts a rotating opening and closing structure, which saves more space than the plug-in gate, thereby increasing the application flexibility of the gate device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a top view of an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of an air collecting box according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 An enlarged schematic diagram of the middle circle A;

[0021] Figure 4 is a schematic structural diagram of a gate device according to an embodiment of the present invention;

[0022] Figure 5 is a schematic structural diagram of a gate device according to an embodiment of the present invention;

[0023] Figure 6 is a front view of a gate device in one embodiment of the present invention when it is fully opened;

[0024] Figure 7 yes Figure 6 Cross-sectional view in the BB direction;

[0025] Figure 8 is a front view of a gate device in one embodiment of the present invention when it is half opened;

[0026] Fig. 9 is a front view of a gate device in one embodiment of the present invention when it is fully closed;

[0027] Fig.10 yes Fig. 9 The cross-sectional view in CC direction;

[0028] Fig.11 is an exploded view of a gate device in one embodiment of the present invention;

[0029] Fig.12 is a schematic structural diagram of a gate device according to another embodiment of the present invention;

[0030] Fig.13 is a structural schematic diagram of an air collecting box according to another embodiment of the present invention;

[0031] Fig.14 It is a schematic diagram of the cross-sectional structure of the gate valve and the air inlet duct through the section of the present invention;

[0032] Fig.15 is a schematic cross-sectional structural diagram of a lifting mechanism and a baffle according to an embodiment of the present invention;

[0033] Fig.16 yes Fig.15 An enlarged schematic diagram of the middle circle D;

[0034] Fig.17 is a schematic cross-sectional structure diagram of a gate valve and a lifting mechanism according to an embodiment of the present invention;

[0035] Fig.18 is a schematic structural diagram of a gate valve according to an embodiment of the present invention;

[0036] Wherein: A1 air collecting box; A11 air box body; A111 through-section cold air cavity; A112 cooling section cold air cavity; A113 support portion; A114 bottom plate portion; A115 pull ring; A12 through-section air inlet duct; A13 cooling section air inlet duct; A14 air outlet duct; A2 first fan assembly; A3 second fan assembly; A31 independent fan; A32 series air duct; A321 adjustment opening; A4 gate device; A41 adjustment plate unit; A411 fan-shaped portion; A412 adjustment connection portion; A413 adjustment connection hole; A414 first arc portion; A415 first slot; A42 mounting seat; A421 shielding assembly ; A4211 fan-shaped portion; A4212 shielding connection portion; A4213 shielding connection hole; A4214 second arc portion; A4215 second slot; A422 rubber sealing portion; A423 grid portion; A43 clamping cylinder; A431 connecting shaft; A44 linear bearing; A5 gate valve; A51 connecting channel; A52 upper cylinder; A53 lower cylinder; A54 upper gate; A55 lower gate; A57 guide plate assembly; A6 cold air regulating device; A61 wind shield; A62 lifting mechanism; A621 rotating wheel; A622 transmission chain; A623 connecting rod; A63 driving motor; A7 pressure gauge; A8 maintenance door. DETAILED DESCRIPTION

[0037] Combine the following Figures 1 to 18, describes an air supply device with dual fans connected in series and precise air control according to an embodiment of the present invention, including an air collecting box 1 and a second fan assembly A3, the air collecting box 1 includes a wind box body A11 and an air inlet pipe, the air collecting cavity of the wind box body A11 and the air outlet of the second fan assembly A3 are connected through the air inlet pipe; the second fan assembly A3 includes an independent fan A31, a series air duct A32 and a shutter device A4, a plurality of the independent fans A31 are connected in series through the series air duct A32; an adjustment opening A321 is opened on the side wall of the series air duct A32, and the series air duct A32 is connected to the outside through the adjustment opening A321. The adjusting opening A321 is fixedly connected with the gate device A4; the gate device A4 comprises an adjusting plate unit A41, a mounting seat A42 and a clamping cylinder A43, the mounting seat A42 is a cylindrical tube structure, the mounting seat A42 is fixedly connected to the tube wall of the series air duct A32, the adjusting plate unit A41 is arranged in the mounting seat A42 and the central axis of the adjusting plate unit A41 coincides with the central axis of the mounting seat A42; thereby, it can rotate in the mounting seat A42 with the central axis of the mounting seat A42 as the rotating axis, and will not collide with the inner wall of the mounting seat A42. The mounting seat A42 is fixedly connected with a shielding component A421, the shielding component A421 is parallel to the adjustment plate unit A41, and the sum of the areas of the shielding component A421 and the adjustment plate unit A41 is greater than or equal to the cross-sectional area of ​​the mounting seat A42; for example, the shielding component A421 is a semicircular structure, and the adjustment plate unit A41 is also a semicircular structure. For another example, the shielding component A421 is a 120° fan-shaped structure, and the adjustment plate unit A41 is a fan-shaped structure greater than 240°. For another example, Fig.12As shown, the shielding assembly A421 is a U-shaped structure, one side of the arc is fixed to one side of the mounting seat A42, and the other side is suspended away from the central axis of the mounting seat A42, and the adjustment plate unit A41 is a structure complementary to the shielding assembly A421. When the shielding assembly A421 and the adjustment plate unit A41 are staggered with each other, it can be ensured that the surface formed by the shielding assembly A421 and the adjustment plate unit A41 can cover the entire cross-sectional area of ​​the mounting seat A42, thereby achieving the purpose of closing the gate device A4. The adjustment plate unit A41 is provided with an adjustment connecting hole A413, the central axis of the adjustment plate unit A41 passes through the adjustment connecting hole A413, and the connecting shaft A431 of the clamping cylinder A43 is fixed to the adjustment connecting hole A413; when the gate device A4 is closed to close the adjustment opening A321, the clamping cylinder A43 drives the adjustment plate unit A41 to rotate with its own central axis as the rotating axis, and moves toward the direction approaching the shielding component A421, and the adjustment plate unit A41 and the shielding component A421 jointly cover the mounting seat A42; when the gate device A4 is opened to open the adjustment opening A321, the clamping cylinder A43 drives the adjustment plate unit A41 to rotate with its own central axis as the rotating axis, and moves toward the direction away from the shielding component A421, and the adjustment plate unit A41 and the shielding component A421 partially or completely overlap. Specifically, by adjusting the rotation angle of the adjustment plate unit A41, the opening of the gate device A4 can be adjusted, thereby achieving the purpose of controlling the wind pressure.

[0038] The clamping cylinder A43 is an existing commonly used cylinder, also called a rotary clamping cylinder. The clamping cylinder A43 can perform a rotational movement while performing a telescopic movement during operation. During operation, the air outlet of the second fan assembly A3 is connected to the air inlet pipe of the air collecting box 1, and the gate device A4 is used to adjust the opening of the adjustment opening A321, thereby adjusting the wind pressure of the air outlet of the series air duct A32, thereby achieving the purpose of indirectly controlling the air outlet pressure of the air collecting box 1. When making thin glass, the gate device A4 is closed, and all independent fans A31 work at the same time. The first independent fan A31 blows air into the next independent fan A31, and finally the last independent fan A31 blows air into the air collecting box A1. When multiple fans are used in series, the total output air pressure is the superposition of the wind pressures of the multiple independent fans A31. The wind pressure is increased to speed up the tempering rate so that the thin glass meets the tempering requirements. When making thick glass, only the independent fan A31 closest to the air inlet pipe needs to be turned on. At this time, the shutter device A4 is opened, and the wind from the external environment enters the independent fan A31 from the shutter device A4, thereby achieving the purpose of energy saving. After the cold air blown out by the fan enters the air collecting cavity in the air box body A11 from the air inlet pipe, the wind pressure is evenly distributed in the air collecting cavity, and then the cold air is blown from the air outlet duct A14 of the air collecting box 1 to the wind grid, and then blown to the hot glass through the wind grid, thereby cooling the glass. When the adjustment plate unit A41 rotates and the gate device A4 closes, the adjustment opening is closed, and the adjustment plate unit A41 moves toward the shielding assembly A421. When the gate device A4 is completely closed, the adjustment plate unit A41 moves toward the shielding assembly A421, thereby avoiding a gap between the adjustment plate unit A41 and the shielding assembly A421, improving the air tightness of the gate device A4, and avoiding the inaccurate adjustment of the wind pressure of the air collecting box 1 due to air leakage from the gate device A4, thereby improving the accuracy of adjusting the wind pressure of the air supply device. In addition, the gate device A4 uses a rotating opening and closing structure, which saves more space than a plug-in gate, thereby increasing the application flexibility of the gate device A4.

[0039] In some embodiments, a first fan assembly A2 is further included; specifically, the first fan assembly A2 is a single fan, and the air outlet of the first fan assembly A2 is the air outlet of the fan. The air collecting cavity of the wind box body A11 is divided into a passing section cold air cavity A111 and a cooling section cold air cavity A112, such as Figure 2 and 14As shown, a gate valve A5 is provided between the passing section cold air chamber A111 and the cooling section cold air chamber A112, and the opening and closing of the gate valve A5 controls the connection or closing of the passing section cold air chamber A111 and the cooling section cold air chamber A112; the air inlet pipe is divided into a passing section air inlet duct A12 and a cooling section air inlet duct A13, and the passing section air inlet duct A12 and the cooling section air inlet duct A13 are both installed on the rear side of the wind box body A11, and the front end of the passing section air inlet duct A12 is connected to the rear end of the passing section cold air chamber A111, and the front end of the cooling section air inlet duct A13 is connected to the rear end of the cooling section cold air chamber A112, as shown Figure 1 As shown, the rear end of the through-section air inlet duct A12 is connected to the air outlet of the second fan assembly A3, and the rear end of the cooling section air inlet duct A13 is connected to the air outlet of the first fan assembly A2. The glass that has been heated at high temperature in the tempered glass furnace needs to be cooled after it comes out of the furnace. The thicker the glass, the slower the cooling speed. Too fast cooling speed will cause the glass to crack and quality accidents. Therefore, it is necessary to adjust the wind pressure of the cooling air according to the thickness of the glass to avoid quality accidents. Figure 1 , 2 As shown in , 3 and 14, a through-section cold air cavity A111 and a cooling section cold air cavity A112 are provided, the second fan assembly A3 inputs the first cooling air into the through-section cold air cavity A111 through the through-section air inlet duct A12, and the first fan assembly A2 inputs the second cooling air into the cooling section cold air cavity A112 through the cooling section air inlet duct A13. Since the first fan assembly A2 has only one fan, and the second fan assembly A3 has multiple independent fans connected in series, the wind pressure of the first cooling air is higher than the wind pressure of the second cooling air. A gate valve A5 is installed between the through-section cold air cavity A111 and the cooling section cold air cavity A112. According to the thickness of the glass to be cooled, the fan connected to the through-section cold air cavity A111 can be opened or closed, or the gate valve A5 can be opened or closed, so that the through-section cold air cavity A111 and the cooling section cold air cavity A112 can obtain suitable wind pressure to ensure the production quality when the glass is cooled.

[0040] For example, when it is necessary to cool tempered glass with a smaller thickness, both the first fan assembly A2 and the second fan assembly A3 are turned on, the wind pressure input through the cold air chamber A111 is higher, and the wind pressure input through the cold air chamber A112 of the cooling section is lower, and the gate valve A5 is closed, and cooling air with a lower component is output to the cooling section with a higher glass temperature through the cold air chamber A112 of the cooling section and the second group of air outlet ducts A14, so that the glass is pre-cooled first, and then when the glass passes through the passing section, the cooling air with a higher wind pressure is output through the cold air chamber A111 of the passing section and the first group of air outlet ducts A14 to quickly cool the glass, thereby improving production efficiency; conversely, when it is necessary to cool thicker tempered glass, the second fan assembly A3 with a higher wind pressure connected to the cold air chamber A111 of the passing section can be closed, or the gate device A4 can be used to adjust the required The wind pressure at the air outlet of the second fan assembly A3 is reduced, and then the gate valve A5 is opened, and the first fan assembly A2 with lower wind pressure connected to the cooling section cold air chamber A112 is opened, and the wind in the passing section cold air chamber A111 is mixed with the wind in the cooling section cold air chamber A112 through the gate valve A5, and the wind pressure in the passing section cold air chamber A111 and the cooling section cold air chamber A112 are the same, and the wind pressures are both low, so that the glass can pass through the cooling section and the passing section at a relatively low speed, and the same wind pressure cooling wind is output through the first group of air outlet ducts A14 and the second group of air outlet ducts A14, so that the glass can be continuously and evenly cooled in the cooling section and the passing section, which can avoid the glass from bursting due to excessively rapid cooling, thereby avoiding the occurrence of quality accidents and further ensuring the quality of the output glass.

[0041] It is worth noting that the adjustment plate unit A41 is provided with a first slot A415, and the shielding assembly A421 is provided with a second slot A4215. When the gate device A4 is fully opened, the first slot A415 is aligned with the second slot A4215. Fig.11As shown, the first slot A415 and the second slot A4215 play a role in guiding wind. When the adjustment plate unit A41 rotates to align the first slot A415 with the second slot A4215, the first slot A415 is connected with the second slot A4215, and wind can be discharged to the outside through the gate device A4. The first slot A415 and the second slot A4215 can be processed into different shapes, such as rectangular, circular, triangular or fan-shaped. The first slot A415 divides the adjustment plate unit A41 into an adjustment connection portion A412, a plurality of fan-shaped portions A411, and a plurality of first arc portions A414. The vertex sides of all the fan-shaped portions A411 are connected through the adjustment connection portion A412, and the arc sides of two adjacent fan-shaped portions A411 are connected through the first arc portion A414. The adjustment connection portion A412 is arranged on the central axis of the mounting seat A42, and the adjustment connection hole A413 is arranged on the adjustment connection portion A412. Figure 5-11 As shown, the connecting shaft A431 of the clamping cylinder A43 drives the adjusting connecting part A412 to rotate and drives the adjusting connecting part A412 to perform telescopic movement in the inner and outer directions of the adjusting opening A321, so that the adjusting connecting part A412 drives all the fan-shaped parts A411 to perform the same rotation and telescopic movement. Since the fan-shaped part A411 is a fan-shaped structure, when rotating and performing telescopic movement, the arc side of the fan-shaped part A411 always matches the shape of the inner wall of the mounting seat A42 of the cylindrical tube structure and will not touch the inner wall of the mounting seat A42, thereby ensuring the smoothness of the rotation of the adjusting plate unit A41. The first arc part A414 plays the role of reinforcing the adjusting plate unit A41, so that the arc sides of all the fan-shaped parts A4211 are connected, thereby improving the firmness and not being easily damaged when subjected to strong winds.

[0042] Optionally, the shielding component A421 is provided with a plurality of second slots A4215, and the second slots A4215 divide the shielding component A421 into a shielding connection portion A4212, a plurality of fan-shaped portions A4211, and a plurality of second arc portions A4214, the arc side of the fan-shaped portion A4211 is fixedly connected to the inner wall of the mounting seat A42, and the vertex sides of all the fan-shaped portions A4211 are connected through the shielding connection portion A4212, and two adjacent ones of the fan-shaped portions A4211 are connected to each other. The arc side of the fan-shaped portion A4211 is connected through the second arc portion A4214, and the second arc portion A4214 is fixedly connected to the inner wall of the mounting seat A42; the shielding connection portion A4212 is arranged on the central axis of the mounting seat A42, and the shielding connection portion A4212 is provided with a shielding connection hole A4213, and the connecting shaft A431 of the clamping cylinder A43 passes through the shielding connection hole A4213 and rotates in the shielding connection hole A4213. Fig. 9 As shown, since the fan-shaped portion A4211 is a fan-shaped structure, the arc side of the fan-shaped portion A4211 can cooperate with the inner wall of the mounting seat A42, and combined with the wind-blocking effect of the second arc portion A4214, it is possible to prevent the adjustment opening A321 from leaking air after the shutter device A4 is closed. In addition, since the vertex sides of all the fan-shaped portions A4211 are connected through the shielding connection portion A4212, the shielding assembly A421 can be stably fixed to the inner wall of the mounting seat A42, and it is not easy to separate from the mounting seat A42 even in strong winds. The shielding connection portion A4212 also plays a role in supporting the clamping cylinder A43, and the clamping cylinder A43 is fixed to the mounting seat A42 through the shielding connection portion A4212, so that its own connecting shaft A431 can rotate relative to the mounting seat A42, thereby driving the adjustment plate unit A41 to rotate. In this embodiment, when the shielding assembly A421 and the adjustment plate unit A41 are staggered to close the gate device A4, the surface formed by the fan-shaped portion A411, the adjustment connection portion A412, the fan-shaped portion A4211 and the shielding connection portion A4212 can cover the entire cross-sectional area of ​​the mounting seat A42, thereby achieving the purpose of closing the gate device A4.

[0043] Specifically, the fan-shaped portions A411 are arranged at intervals in the mounting seat A42, the fan-shaped portions A4211 are arranged at intervals in the mounting seat A42, and the number of the fan-shaped portions A411 is equal to the number of the fan-shaped portions A4211; when the gate device A4 is closed, the fan-shaped portions A411 and the fan-shaped portions A4211 are staggered. Figure 5As shown, the inner side of the adjustment opening A321 of the series air duct A32 is the air inlet, and the outer side of the adjustment opening A321 is the air outlet. The more the number of the fan-shaped parts A411 and / or the number of the fan-shaped parts A4211, the smaller the angle of rotation of the fan-shaped parts A411 when the gate device A4 is opened and closed, and the higher the requirement for the rotation accuracy. After the gate device A4 is closed, the structure of the fan-shaped parts A411 and the fan-shaped parts A4211 that are staggered can make the fan-shaped parts A411 overlap with the fan-shaped parts A4211 when the gate device A4 is opened, so that the first slot A415 is aligned with the second slot A4215, so that the wind can be evenly discharged from the air outlet of the flip gate. Preferably, the adjustment plate unit A41 includes two fan-shaped portions A411, which are relatively arranged on both sides of the adjustment connection portion A412; the shielding assembly A421 includes two fan-shaped portions A4211, which are relatively arranged on both sides of the shielding connection portion A4212, and the angular arc of the fan-shaped portion A4211 is 90°. When the angular curvature of the fan-shaped portion A4211 is greater than 90°, the maximum angular curvature of a single air inlet is less than 90°, which makes the area of ​​the air inlet too small and is not conducive to strong wind flowing through; when the angular curvature of the fan-shaped portion A4211 is less than 90°, the maximum angular curvature of a single air inlet is greater than 90°, the arc length of the air inlet is too long, and the angle at which the adjustment plate unit A41 needs to rotate is too large, which is not conducive to the rapid opening and closing of the gate device A4; when the angular curvature of the fan-shaped portion A4211 is 90°, it is not only conducive to the strong wind flowing through, but also conducive to the rapid opening and closing of the gate device A4.

[0044] In some embodiments, such as Figure 4 , 5 As shown in Figures 7 and 10, the adjustment plate unit A41 is arranged on the air inlet side of the mounting seat A42, and the shielding assembly A421 is arranged on the air outlet side of the mounting seat A42. In this way, after the gate device A4 is completely closed, strong wind blows onto the surface of the adjustment plate unit A41, thereby pressing the adjustment plate unit A41 against the shielding assembly A421, further improving the sealing performance and avoiding air leakage. It is worth noting that the edge of the second slot A4215 is provided with a rubber sealing portion A422. Figure 5 , 8 As shown in FIG. 11 , the rubber seal A422 can further ensure the air tightness of the gate device A4, and it is not easy to leak air after the gate device A4 is completely closed. Optionally, the mounting seat A42 is provided with a mesh portion A423, and the area of ​​the mesh portion A423 is equal to the cross-sectional area of ​​the mounting seat A42. Figure 4As shown, the grid portion A423 can effectively isolate large items from the outside, thereby preventing large items from entering the series air duct A32 and damaging related equipment of the air supply device. Specifically, the shielding connection hole A4213 is provided with a linear bearing A44, and the connecting shaft A431 of the pressing cylinder A43 passes through the linear bearing A44 and is slidably connected to the linear bearing A44. Figure 4 and 7 As shown, the linear bearing A44 is used to guide the connecting shaft A431 of the clamping cylinder A43 to perform telescopic movement in the inner and outer directions of the adjustment opening A321.

[0045] In some embodiments, the gate valve A5 includes a connecting channel A51, an upper cylinder A52, a lower cylinder A53, an upper gate A54 and a lower gate A55; the connecting channel A51 is installed on the partition between the passing section cold air chamber A111 and the cooling section cold air chamber A112, and the passing section cold air chamber A111 and the cooling section cold air chamber A112 are connected through the connecting channel A51; the upper cylinder A52 and the lower cylinder A53 are respectively installed on the top surface and the bottom surface of the connecting channel A51; the lower end of the upper gate A54 passes through the upper side wall of the connecting channel A51 and is inserted into the connecting channel A51, and the upper end of the lower gate A55 passes through the connecting channel The lower side wall of A51 is inserted into the connecting channel A51, the upper end of the upper gate A54 is connected to the output end of the upper cylinder A52, and the lower end of the lower gate A55 is connected to the output end of the lower cylinder A53; the upper cylinder A52 drives the upper gate A54 to move up and down, and the lower cylinder A53 drives the lower gate A55 to move up and down. The lower gate A55 and the upper gate A54 are arranged in a front-to-back arrangement. When the upper gate A54 slides to the maximum stroke, the upper gate A54 completely covers the connecting channel A51, and when the lower gate A55 slides to the maximum stroke, the lower gate A55 covers part of the connecting channel A51. Fig.14 , 17As shown in Figure 18, the upper gate plate A54 or the lower gate plate A55 can be controlled to move up and down respectively by the upper cylinder A52 or the lower cylinder A53, thereby controlling the opening and closing of the gate valve A5, and further controlling the connection or isolation of the cold air chamber A111 and the cooling section cold air chamber A112 to adjust the wind pressure output by the first group of air outlet ducts A14 and the second group of air outlet ducts A14. The cold air chamber A111 of the passing section and the cold air chamber A112 of the cooling section are connected through the gap between the upper gate A54 and the lower gate A55. As the upper gate A54 moves downward and the lower gate A55 moves upward, the lower end of the upper gate A54 and the upper end of the lower gate A55 gradually approach each other, and the gap between the lower end of the upper gate A54 and the upper end of the lower gate A55 gradually decreases, and the air flow in the gap also decreases. When the lower end of the upper gate A54 passes over the upper end of the lower gate A55 downward, the channel that can be used for air supply is the relative channel between the upper gate A54 and the lower gate A55. The gap between the two plate surfaces reaches the maximum stroke when the lower end of the upper gate plate A54 passes over the lower side of the connecting channel A51, and the connecting channel A51 is completely isolated and in a completely closed state; in the process from fully open to fully closed, the air supply channel of the connecting channel A51 is gradually reduced; similarly, in the process from fully closed to fully open, the wind flow conveying channel of the connecting channel A51 is also gradually expanded. When the wind pressure of the fan remains unchanged, the wind pressure fluctuation of the airflow conveyed in the connecting channel A51 is small, which can effectively avoid the appearance of air mark defects on the glass surface due to excessive wind pressure changes.

[0046] It is worth noting that the lower end edge of the upper gate A54 is an arc-shaped protruding toward the center direction of the connecting channel A51; the upper end edge of the lower gate A55 is an arc-shaped protruding toward the center direction of the connecting channel A51. Fig.17 and 18 As shown, the end edge of the lower end of the upper gate plate A54 and the end edge of the upper end of the lower gate plate A55 are set to be a protruding arc shape. When the two gate plates are close to each other and the arc-shaped ends of the upper gate plate A54 and the lower gate plate A55 overlap, the ventilation area changes in a curve, and the force of the wind acting on the plate surface changes relatively smoothly, so that the force change of the cylinder output is smoother, the control of the upper gate plate A54 and the lower gate plate A55 is more stable, and the cylinder is not easily damaged.

[0047] Optionally, the gate valve A5 further comprises a plurality of guide plate assemblies A57; guide grooves are provided in the guide plate assemblies A57, and the plurality of guide plate assemblies A57 are symmetrically installed on the front and rear sides of the partition in groups of two, and the guide plate assemblies A57 are distributed on the upper and lower sides of the connecting channel A51; the upper gate plate A54 and the lower gate plate A55 slide along the corresponding guide grooves of the guide plate assemblies A57. Fig.18As shown, the left and right sides of the upper gate plate A54 or the lower gate plate A55 move up and down in the guide groove of the corresponding guide plate assembly A57, which can ensure that the upper gate plate A54 and the lower gate plate A55 will not swing left and right when moving up and down, further improving the operating stability of the wind collecting box 1 with wind pressure regulating function.

[0048] Specifically, the front end of the passing section cold air cavity A111 and the front end of the cooling section cold air cavity A112 are both connected to a plurality of air outlet ducts A14 distributed in an array, the passing section cold air cavity A111 supplies air to the passing section of the glass tempering furnace through the air outlet duct A14, and the cooling section cold air cavity A112 supplies air to the cooling section of the glass tempering furnace through the air outlet duct A14; the front end of the passing section cold air cavity A111 and the front end of the cooling section cold air cavity A112 are respectively installed with the cold air regulating device A6, the cold air regulating device A6 comprises a lifting mechanism A62 and a wind shield A61, the wind shield A61 is transmission-connected to the lifting mechanism A62, the lifting mechanism A62 drives the wind shield A61 to move up and down, and when moving up and down, the wind shield A61 blocks a row of the air outlet ducts A14 or the area between the upper and lower rows of the air outlet ducts A14. Fig.15 and 16 As shown, the upper and lower heights of the wind shield A61 can be adjusted by the cold air regulating device A6, and an exhaust air duct A14 can be partially or completely covered, or all exhaust air ducts A14 can be left uncovered, so as to achieve the purpose of adjusting the wind pressure and wind speed output by the exhaust air duct A14, thereby ensuring the production quality of tempered glass cooling.

[0049] Preferably, the cold air regulating device A6 further comprises a driving motor A63, and the driving motor A63 is installed on the outside of the bellows body A11; the lifting mechanism A62 further comprises a rotating wheel A621, a transmission chain A622 and a connecting rod A623; the connecting rod A623 is installed below the wind shield A61, and one end of the connecting rod A623 is drivingly connected to the output end of the driving motor A63; the plurality of rotating wheels A621 are divided into two groups, the rotating wheels A621 of the first group are arranged at intervals and are fitted on the connecting rod A623, and the rotating wheels A621 of the second group are arranged at intervals and are fitted on the connecting rod A623. 621 is installed above the wind shield A61, and the second group of rotating wheels A621 and the first group of rotating wheels A621 are arranged one by one with respect to the wind shield A61; every two rotating wheels A621 corresponding to each other are equipped with the transmission chain A622, and the transmission chain A622 is connected to the rear side of the wind shield A61; the driving motor A63 drives the rotating wheels A621 to rotate forward and reverse through the connecting rod A623, thereby driving the transmission chain A622 to move up and down, and further driving the wind shield A61 to move up and down synchronously. Fig.15 and 16As shown, by driving the motor A63, the rotating wheel A621, the transmission chain A622 and the connecting rod A623 to drive the wind shield A61 to move up and down synchronously, the first exhaust air duct A14 or the second exhaust air duct A14 can be covered by the wind shield A61, thereby ensuring that the wind pressure and wind speed of the cooling air output by each air outlet duct A14 of the first exhaust air duct A14 or the second exhaust air duct A14 are the same, thereby keeping the surface temperature of the tempered glass cooling down at a relatively consistent speed, thereby preventing quality accidents such as glass bursting.

[0050] Furthermore, the bellows body A11 is further provided with four supporting parts A113, which are respectively installed below the four corners of the bellows body A11; and the bottom surfaces of the four supporting parts A113 are located on the same plane. Fig.17 As shown, the bottom surfaces of the four support parts A113 are located on the same plane, which can make the wind box body A11 have better installation stability and improve the operating stability of the wind collecting box 1 with wind pressure regulating function. Furthermore, the wind box body A11 is also provided with a bottom plate part A114; the bottom plate part A114 is located below the passing section cold air cavity A111 and the cooling section cold air cavity A112, and the distance between the rear bottom edge of the bottom plate part A114 away from the air outlet duct A14 and the bottom surface of the support part A113 is greater than the distance between the front bottom edge of the bottom plate part A114 close to the air outlet duct A14 and the bottom surface of the support part A113. Fig.17 As shown, the air collecting box 1 is installed near the cooling section and the passing section of the tempered glass output from the glass tempering furnace. The tempered glass running from right to left is located on the front side of the wind box body A11. The cold air with the tempered glass blows downward on the surface of the tempered glass. The cold air that has exchanged heat becomes hot air carrying heat and then passes through the bottom of the bottom plate A114 and is discharged to the rear side of the wind box body A11. The bottom plate A114 is set to be inclined, and the rear bottom edge of the bottom plate A114 away from the air outlet duct A14 is higher than the front bottom edge of the bottom plate A114, which is beneficial to the discharge and diffusion of hot air and the improvement of the cooling efficiency of the tempered glass. Furthermore, it also includes a pressure gauge A7; the two pressure gauges A7 are respectively installed on the outer side surfaces of the left and right sides of the wind box body A11, and the pressure gauge A7 is used to measure the wind pressure of the passing section cold air cavity A111 or the cooling section cold air cavity A112. Figure 2 and 13As shown, the pressure gauge A7 can effectively monitor the wind pressure passing through the cold air chamber A111 and the cooling cold air chamber A112, so that the operator can open and close the gate valve A5 in time, or open and close the second fan assembly A3 to adjust the output wind pressure, and then control the wind pressure passing through the cold air chamber A111 and the cooling cold air chamber A112 to meet the requirements of the production process. Furthermore, the wind box body A11 is also provided with a maintenance door A8; the two maintenance doors A8 are respectively installed on the left and right sides of the wind box body A11, and the pressure gauge A7 is located in front of or behind the maintenance door A8. Figure 2 and 13 As shown, the maintenance door A8 can be used to timely and effectively repair and maintain the equipment and facilities in the cold air chamber A111 or the cold air chamber A112 of the cooling section. Furthermore, the top surface of the wind box body A11 is also provided with two pull rings A115; the midpoint of the line connecting the two pull rings A115 and the center of gravity of the wind box body A11 are on the same vertical line; the connection angles in the wind box body A11 are all arc angles. Figure 2 and 13 As shown, the wind box 1 with wind pressure regulating function can be stably lifted by two pull rings A115, and disassembly and installation are more convenient. The connection angles in the wind box body A11 are all arc angles, which can reduce the wind speed loss in the wind box body A11 and improve the utilization rate of cooling air.

[0051] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. An air supply device with dual fans in series and precise air control, comprising an air collecting box and a second fan assembly, characterized in that: The air collecting box comprises an air box body and an air inlet pipe, and the air collecting cavity of the air box body and the air outlet of the second fan assembly are connected via the air inlet pipe; The second fan assembly includes an independent fan, a series air duct and a damper device, wherein a plurality of the independent fans are connected in series through the series air duct; an adjustment opening is provided on the side wall of the series air duct, and the series air duct is connected to the outside through the adjustment opening; and the damper device is fixedly connected to the adjustment opening; The gate device comprises an adjusting plate unit, a mounting seat and a pressing cylinder, wherein the mounting seat is a cylindrical tube structure, the mounting seat is fixedly connected to the tube wall of the series air duct, the adjusting plate unit is arranged in the mounting seat and the central axis of the adjusting plate unit coincides with the central axis of the mounting seat; A shielding component is fixedly connected in the mounting seat, the shielding component is parallel to the adjustment plate unit, and the sum of the areas of the shielding component and the adjustment plate unit is greater than or equal to the cross-sectional area of ​​the mounting seat; The adjusting plate unit is provided with an adjusting connection hole, the central axis of the adjusting plate unit passes through the adjusting connection hole, and the connecting axis of the clamping cylinder is fixed to the adjusting connection hole; when the gate device is closed to close the adjusting opening, the clamping cylinder drives the adjusting plate unit to rotate with its own central axis as the rotating axis, and moves in the direction close to the shielding assembly, and the adjusting plate unit and the shielding assembly jointly cover the mounting seat; when the gate device is opened to open the adjusting opening, the clamping cylinder drives the adjusting plate unit to rotate with its own central axis as the rotating axis, and moves in the direction away from the shielding assembly, and the adjusting plate unit and the shielding assembly partially or completely overlap; The adjusting plate unit is provided with a first slot, the shielding assembly is provided with a second slot, and when the gate device is fully opened, the first slot is aligned with the second slot; The first slot divides the adjustment plate unit into an adjustment connection portion, a plurality of fan-shaped portions and a plurality of first arc portions, the vertex sides of all the fan-shaped portions are connected through the adjustment connection portion, and the arc sides of two adjacent fan-shaped portions are connected through the first arc portion, the adjustment connection portion is arranged on the central axis of the mounting seat, and the adjustment connection hole is arranged on the adjustment connection portion; Also included is a first fan assembly; The air collecting chamber of the wind box body is divided into a passing section cold air chamber and a cooling section cold air chamber, and a gate valve is provided between the passing section cold air chamber and the cooling section cold air chamber, and the opening and closing of the gate valve controls the connection or closing of the passing section cold air chamber and the cooling section cold air chamber; The air inlet duct is divided into a passing section air inlet duct and a cooling section air inlet duct, both of which are installed on the rear side of the wind box body, the front end of the passing section air inlet duct is connected to the rear end of the passing section cold air cavity, the front end of the cooling section air inlet duct is connected to the rear end of the cooling section cold air cavity, the rear end of the passing section air inlet duct is connected to the air outlet of the second fan assembly, and the rear end of the cooling section air inlet duct is connected to the air outlet of the first fan assembly.

2. The air supply device with dual fans connected in series and precise air control according to claim 1, characterized in that: The shielding assembly is provided with a plurality of second grooves, and the second grooves divide the shielding assembly into a shielding connection portion, a plurality of fan-shaped portions and a plurality of second arc portions, the arc side of the fan-shaped portion is fixedly connected to the inner wall of the mounting seat, the vertex sides of all the fan-shaped portions are connected through the shielding connection portion, the arc sides of two adjacent fan-shaped portions are connected through the second arc portion, and the second arc portion is fixedly connected to the inner wall of the mounting seat; the shielding connection portion is arranged on the central axis of the mounting seat, and the shielding connection portion is provided with a shielding connection hole, and the connecting shaft of the clamping cylinder passes through the shielding connection hole and rotates in the shielding connection hole.

3. The air supply device with dual fans connected in series and precise air control according to claim 2, characterized in that: The fan-shaped parts are arranged at intervals in the mounting seat, the fan-shaped parts are arranged at intervals in the mounting seat, and the number of the fan-shaped parts is equal to the number of the fan-shaped parts; When the gate device is closed, the fan-shaped parts are arranged alternately with the fan-shaped parts.

4. The air supply device with dual fans connected in series and precise air control according to claim 1, characterized in that: The gate valve comprises a connecting channel, an upper cylinder, a lower cylinder, an upper gate plate and a lower gate plate; The connecting channel is installed on a partition between the passing section cold air cavity and the cooling section cold air cavity, and the passing section cold air cavity and the cooling section cold air cavity are connected through the connecting channel; The upper cylinder and the lower cylinder are respectively mounted on the top surface and the bottom surface of the connecting channel; The lower end of the upper gate plate is inserted into the connecting channel through the upper side wall of the connecting channel, the upper end of the lower gate plate is inserted into the connecting channel through the lower side wall of the connecting channel, the upper end of the upper gate plate is transmission-connected to the output end of the upper cylinder, and the lower end of the lower gate plate is transmission-connected to the output end of the lower cylinder; The upper cylinder drives the upper gate plate to move up and down, and the lower cylinder drives the lower gate plate to move up and down. The lower gate plate and the upper gate plate are arranged in a front-to-back manner. When the upper gate plate slides to the maximum stroke, the upper gate plate completely covers the connecting channel. When the lower gate plate slides to the maximum stroke, the lower gate plate covers a partial area of ​​the connecting channel.

5. The air supply device with dual fans connected in series and precise air control according to claim 4, characterized in that: The end edge of the lower end of the upper gate plate is in an arc shape protruding toward the center direction of the connecting channel; The end edge of the upper end of the lower gate plate is in an arc shape protruding toward the center direction of the connecting channel.

6. The air supply device with dual fans connected in series and precise air control according to claim 4, characterized in that: The gate valve also includes a plurality of guide plate assemblies; A guide groove is provided in the guide plate assembly, and a plurality of the guide plate assemblies are symmetrically installed on the front and rear sides of the partition in groups of two, and the guide plate assemblies are distributed on the upper and lower sides of the connecting channel; The upper gate plate and the lower gate plate slide along the corresponding guide grooves of the guide plate assembly.

7. The air supply device with dual fans connected in series and precise air control according to claim 1, characterized in that: The front ends of the through-section cold air cavity and the cooling-section cold air cavity are both connected with a plurality of air outlet ducts distributed in an array, the through-section cold air cavity supplies air to the through-section of the glass tempering furnace through the air outlet duct, and the cooling-section cold air cavity supplies air to the cooling section of the glass tempering furnace through the air outlet duct; A cold air regulating device is respectively installed at the front end of the passing section cold air cavity and the front end of the cooling section cold air cavity, and the cold air regulating device includes a lifting mechanism and a wind shield plate, and the wind shield plate is transmission-connected to the lifting mechanism, and the lifting mechanism drives the wind shield plate to move up and down, and when moving up and down, the wind shield plate blocks a row of the air outlet ducts or the area between the upper and lower rows of the air outlet ducts.

8. The air supply device with dual fans connected in series and precise air control according to claim 7, characterized in that: The cold air regulating device further comprises a driving motor, and the driving motor is installed on the outside of the wind box body; The lifting mechanism further comprises a rotating wheel, a transmission chain and a connecting rod; the connecting rod is installed below the wind shield, and one end of the connecting rod is transmission-connected to the output end of the driving motor; The plurality of rotating wheels are divided into two groups, the rotating wheels of the first group are arranged at intervals and mounted on the connecting rod, and the rotating wheels of the second group are installed above the wind shielding plate, and the rotating wheels of the second group correspond to the rotating wheels of the first group and are arranged at intervals from the wind shielding plate one by one; Every two upper and lower corresponding rotating wheels are provided with the transmission chain, and the transmission chain is connected to the rear side of the wind shield; The driving motor drives the rotating wheel to rotate forward and reversely through the connecting rod, thereby driving the transmission chain to move up and down, and further driving the wind shield to move up and down synchronously.

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