Cooling device and glass production line

Abstract

The utility model belongs to glass forming field especially relates to a cooling device and glass production line. Cooling device includes: conveying structure for conveying the piece of cooling, blow structure for blowing jet airflow, air guide structure is equipped with ventilation pipeline, both ends of ventilation pipeline are respectively communicated blow structure and conveying structure, and multiple ventilation pipelines are arranged at intervals, and control valve is located ventilation pipeline, multiple control valves are arranged at intervals, and each control valve corresponds with each ventilation pipeline one to one respectively, and any control valve has start state and close state, when control valve is in start state, airflow blows towards the piece of cooling through ventilation pipeline, when control valve is in close state, control valve closes ventilation pipeline to block airflow and blows towards the piece of cooling. The utility model can improve the applicability of cooling device and enhance the cooling effect.

Description

Technical Field

[0001] This utility model belongs to the field of glass forming technology, and in particular relates to cooling devices and glass production lines. Background Technology

[0002] In the field of glass deep processing, physical tempering is a widely used technology for manufacturing high-strength, high-safety tempered glass. The core process involves heating the flat glass to near its softening point, placing it in a red-hot, softened state, and then conveying it to a cooling zone for rapid and uniform cooling. Rapid cooling is crucial for achieving glass tempering. Currently, mainstream production lines typically use cooling devices composed of fans and air ducts. The high-speed airflow generated by the cooling fans is evenly blown onto the upper and lower surfaces of the glass through the nozzles of the air ducts, causing the glass surface to cool and solidify rapidly, thereby creating permanent compressive stress within the glass that significantly increases its strength.

[0003] However, existing cooling devices exhibit significant limitations when dealing with glass products of varying specifications. Different types of glass differ in thickness, size, and shape, resulting in drastically different heat dissipation rates and the cooling intensity required to achieve optimal tempering. For instance, thin glass dissipates heat quickly, requiring lower air pressure to prevent excessive deformation; while thick glass dissipates heat slowly, necessitating higher air pressure and volume to ensure sufficient cooling. Traditional cooling fan grilles typically provide a fixed airflow or allow for uniform overall airflow adjustment, failing to provide differentiated and precise airflow control based on the cooling needs of different types of glass. This can easily lead to uneven internal stress distribution, resulting in optical distortion, insufficient strength, or even direct breakage. Utility Model Content

[0004] The purpose of this application is to provide a cooling device that addresses the problems of improving the applicability of the cooling device and enhancing the cooling effect.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, a cooling device is provided for cooling a component to be cooled, the cooling device comprising: The system includes a conveying structure for conveying the component to be cooled; a blowing structure for blowing airflow; a guiding structure with ventilation ducts, the two ends of which are connected to the blowing structure and the conveying structure, and multiple ventilation ducts arranged at intervals; and control valves located in the ventilation ducts, with multiple control valves arranged at intervals, each control valve corresponding to a specific ventilation duct, and each control valve having an on state and a off state. When a control valve is in the on state, the airflow is blown towards the component to be cooled through the ventilation duct; when a control valve is in the off state, the control valve closes the ventilation duct to prevent the airflow from blowing towards the component to be cooled.

[0006] In some embodiments, the distance between two adjacent ventilation ducts gradually increases along the direction of the air blowing structure toward the part to be cooled.

[0007] In some embodiments, the conveying structure has a conveying surface for supporting the part to be cooled, the conveying surface being a curved surface with a preset curvature, so as to bend and shape the heated and softened part to be cooled during conveying.

[0008] In some embodiments, each of the ventilation ducts is arranged radially along the curved surface.

[0009] In some embodiments, the conveying structure includes a rotatably arranged support roller for supporting the part to be cooled. Multiple support rollers are arranged at intervals, and the contact surfaces of each support roller and the part to be cooled together constitute the conveying surface.

[0010] In some embodiments, the conveying structure further includes rotatably arranged pressure rollers, a plurality of pressure rollers are arranged at intervals, each pressure roller corresponds one-to-one with each support roller, a channel is formed between the pressure rollers and the support rollers for the part to be cooled to pass through, and the rotation directions of the pressure rollers and the support rollers are opposite.

[0011] In some embodiments, the cooling device further includes a control structure communicatively connected to the conveying structure, the control structure being used to control the forward or reverse rotation of the support roller and the pressure roller.

[0012] In some embodiments, the control valve is a solenoid valve or a pneumatic valve.

[0013] In some embodiments, the blowing structure includes a bellows with an inner cavity and a fan communicating with the inner cavity. The fan is used to draw external gas into the inner cavity. The bellows has an air outlet facing the conveying structure. The air outlet is provided with a plurality of air holes communicating with the inner cavity. The air holes are connected to the ventilation duct.

[0014] Secondly, a glass production line is provided, which includes the cooling device described above. The beneficial effects of this application are as follows: When the cooling device of this application is in use, the control valve can be switched to the start state or the close state as needed, so that each ventilation duct can be selectively opened. When the control valve is in the start state, the airflow blows towards the part to be cooled through the ventilation duct; when the control valve is in the close state, the control valve closes the ventilation duct, thereby blocking the airflow from blowing towards the part to be cooled, so that the air volume can be flexibly controlled to adapt to the parts to be cooled with different cooling intensity requirements. There is no need to replace the cooling device for a specific part to be cooled, which improves the applicability of the cooling device. Furthermore, the embodiments of this application integrate the cooling function into the conveying path of the part to be cooled, eliminating the need to set up separate conveying stations and cooling stations. This makes the structure of the cooling device more compact and helps to reduce the space occupied by the cooling device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the cooling device provided in one embodiment of this application; Figure 2 This is a schematic diagram of the cooling device provided in another embodiment of this application; Figure 3 This is a partial structural schematic diagram of the cooling device provided in the embodiments of this application.

[0017] The following are the labeling elements in the figure: 10. Conveying structure; 11. Support roller; 12. Pressure roller; 13. Channel; 14. Conveying surface; 20. Blowing structure; 21. Air box; 211. Inner cavity; 212. Air hole; 22. Fan; 23. Filter; 30. Air guide structure; 31. Ventilation duct; 40. Control valve; 200. Component to be cooled. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Please see Figures 1 to 3This application provides a cooling device for cooling a component 200. The cooling device includes: a conveying structure 10 for conveying the component 200; a blowing structure 20 for blowing airflow; a guide structure 30 with ventilation ducts 31, the two ends of which are connected to the blowing structure 20 and the conveying structure 10 respectively, and multiple ventilation ducts 31 arranged at intervals; and control valves 40 disposed in the ventilation ducts 31, with multiple control valves 40 arranged at intervals, each control valve 40 corresponding to a specific ventilation duct 31, and each control valve 40 having an open state and a closed state; when the control valve 40 is in the open state, airflow is blown towards the component 200 through the ventilation ducts 31; when the control valve 40 is in the closed state, the control valve 40 closes the ventilation ducts 31 to block airflow from blowing towards the component 200.

[0023] Understandably, the part to be cooled 200 is glass that has been heated and softened. In the previous process, after the glass is heated to near its softening point, it is quickly sent to the cooling device. The blowing structure 20 blows a large amount of high-pressure, low-temperature cold air. When the control valve 40 is in the activated state, the airflow blows towards the part to be cooled 200 through the ventilation duct 31 where the control valve 40 is located. The glass surface cools and hardens first, that is, the glass surface cools and solidifies rapidly and becomes hard. At this time, the inside of the glass is still in a high-temperature, expanding state. When the inside slowly cools and tries to contract, the solidified surface will "pull" the inside, thereby forming a permanent stress field inside the glass. Finally, a strong compressive stress layer is formed on the glass surface, while a tensile stress layer is formed inside to balance it. This can create tempering stress and improve the strength of the glass, which is 3-5 times stronger than that of ordinary annealed glass.

[0024] In this embodiment, the control valve 40 refers to any structure or device capable of opening, closing, or regulating a fluid passage. The control valve 40, located in the ventilation duct 31, can respond to a control signal to change the airflow state to the component 200 to be cooled. In this embodiment, the control valve 40 is located on the ventilation duct 31, specifically near the inlet end of the blowing structure 20, in the middle section of the duct, or near the outlet end of the component 200 to be cooled. Optionally, the control valve 40 is located in a position where the airflow is stable and easy to maintain.

[0025] It should be noted that traditional tempered glass bending production requires heating first, then moving to the forming station, and finally moving to the cooling station, involving multiple work areas. This embodiment, however, seamlessly integrates the cooling and forming function into the conveying path, eliminating the separate forming station and complex transfer mechanism. This makes the cooling device more compact, reduces its footprint, and significantly shortens the production cycle, achieving efficient and continuous production.

[0026] The cooling device provided in this application embodiment can be switched to an on or off state as needed, allowing each ventilation duct 31 to be selectively opened. When the control valve 40 is in the on state, airflow blows through the ventilation duct 31 toward the part to be cooled 200; when the control valve 40 is in the off state, the control valve 40 closes the ventilation duct 31, thereby blocking the airflow from blowing toward the part to be cooled 200. This allows for flexible control of the airflow, adapting to parts 200 with different cooling intensity requirements, without the need to replace the cooling device for a specific part 200, thus improving the applicability of the cooling device. Furthermore, this application embodiment integrates the cooling function into the conveying path of the part 200 to be cooled, eliminating the need for separate conveying and cooling stations. This makes the structure of the cooling device more compact, which helps to reduce the space occupied by the cooling device.

[0027] In addition, the cooling device of this application performs cooling treatment during the continuous conveying of the part to be cooled 200 without interruption, so that the airflow can blow to various areas of the surface of the part to be cooled 200, thereby achieving uniform cooling of the part to be cooled 200 and effectively enhancing the cooling effect.

[0028] Understandably, in this embodiment of the application, the ventilation duct 31 can be corresponding to different cooling areas of the part to be cooled 200. By independently controlling the opening and closing of the ventilation duct 31 corresponding to different cooling areas, different cooling intensities can be applied to different parts of the part to be cooled 200, such as the main planar area, edge, periphery of holes, or areas of abrupt thickness change. This effectively avoids the problem of local cooling being too fast or too slow due to the complex shape or uneven thickness of the glass, fundamentally reduces the optical distortion and stress unevenness of the glass, and significantly improves the finished quality and mechanical properties of tempered glass.

[0029] Specifically, when the component 200 to be cooled is perforated glass, the ventilation duct 31 facing the perforation area can be closed to prevent airflow leakage or the formation of vortices at the perforation, which could cause defects. When the component 200 to be cooled is glass of uneven thickness, more ducts can be opened in the thicker areas to enhance cooling. This flexibility reduces reliance on dedicated air grilles or complex mechanical adjustments and improves cold production efficiency.

[0030] In some embodiments, the spacing between two adjacent ventilation ducts 31 gradually increases along the direction from the blowing structure 20 toward the component to be cooled 200. Understandably, a smaller spacing is used near the inlet end of the blowing structure 20, which aligns with the relatively concentrated state of the airflow as it exits the blowing structure 20, facilitating efficient airflow distribution. As the ducts extend forward, the spacing gradually increases, providing ample space for expansion and stabilization of the airflow within each duct. This significantly reduces potential mutual interference, entrainment, and vortex phenomena that may occur between adjacent high-speed airflows inside the ducts and at the outlet. This not only reduces internal airflow loss and improves air delivery efficiency but also makes the airflow blowing onto the glass surface more stable and smooth, resulting in superior cooling effects and glass surface quality.

[0031] In some embodiments, the conveying structure 10 has a conveying surface 14 for supporting the part to be cooled 200. The conveying surface 14 is a curved surface with a preset curvature, so as to bend and shape the heated and softened part to be cooled 200 during conveying. Compared with external molding and other methods, the embodiments of this application support the glass with a conveying surface 14 having a preset curvature. It mainly relies on the natural downward droop of the glass in the softened state to conform to the curved surface, so that the final formed glass also has a preset curvature, that is, the curvature of the final formed glass is consistent with the curvature of the conveying surface 14. This forming method has uniform and gentle force, which can effectively reduce local stress concentration and optical distortion caused by mechanical pressure, and make the thickness distribution of the glass more uniform, thereby obtaining a bent tempered glass product with higher surface quality and better visual performance.

[0032] It should be noted that traditional tempered glass bending production requires heating, then moving the glass to the forming station, and finally to the cooling station, involving multiple work areas. This embodiment, however, seamlessly integrates the forming function into the conveyor path, eliminating the separate forming station and complex transfer mechanism. This makes the cooling device more compact, reduces its footprint, and significantly shortens the production cycle, achieving truly efficient and continuous production.

[0033] In some embodiments, each ventilation duct 31 is arranged radially along the curved surface. The radial arrangement of each ventilation duct 31 means that the airflow direction at the outlet of each ventilation duct 31 is always perpendicular to the tangent at the corresponding position on the transmission surface 14. This vertical airflow method minimizes airflow slippage and scattering on the surface of the component to be cooled 200, maximizing the utilization of the kinetic energy and heat exchange area of ​​the cold air. This ensures that the cooling intensity per unit area on the three-dimensional curved surface of the component to be cooled remains consistent, improving the stress uniformity and optical quality of the tempered glass.

[0034] Furthermore, the radial layout of the ventilation duct 31 allows the airflow exiting the ventilation duct 31 to naturally conform to the contour of the surface of the component 200 to be cooled. Whether in the central or edge region of the surface of the component 200, the airflow can reach the surface of the component 200 with the most direct and shortest path, avoiding cooling dead zones and overheated areas caused by oblique airflow or distance differences. Moreover, in this embodiment, the ventilation duct 31 is configured as a straight line or approximately a straight line along the radial direction of the curved surface. A straight duct structure not only has lower flow resistance and lower energy loss, but also higher mechanical strength and greater structural stability, resulting in higher reliability and a longer service life under long-term vibration and high-load operating environments.

[0035] In some embodiments, the conveying structure 10 includes rotatably arranged support rollers 11 for supporting the part to be cooled 200. Multiple support rollers 11 are spaced apart, and the contact surfaces of each support roller 11 and the part to be cooled 200 together form a conveying surface 14. The multiple support rollers 11 are arranged along a curved contour, providing continuous and uniform linear support for the heated and softened glass. This spaced contact greatly reduces the contact area with the high-temperature glass, thereby minimizing scratches, cooling marks, or thermal shock cracks on the glass surface caused by excessive contact area, ensuring the original surface quality of the glass.

[0036] Furthermore, the spacing between adjacent support rollers 11 provides a flow channel 13 for airflow, allowing the cooling airflow blown from the ventilation duct 31 to act on the upper surface of the glass. Using a standard rotating roller as the core component, the structure is mature, the drive is simple, and the reliability is high. Damage to a single support roller 11 only requires individual replacement, resulting in extremely low maintenance costs. Moreover, by changing the height of the support rollers 11 at different positions, various curvatures of the transmission surface 14 can be flexibly combined, enabling this structure to be used for cooling flat glass as well as quickly adapting to the production of bent tempered glass with various curvatures, further improving the applicability of the cooling device.

[0037] In some embodiments, the conveying structure 10 further includes rotatably arranged pressure rollers 12, with multiple pressure rollers 12 spaced apart. Each pressure roller 12 corresponds one-to-one with a support roller 11, forming a channel 13 between the pressure rollers 12 and the support rollers 11 for the material to be cooled 200 to pass through. The pressure rollers 12 and the support rollers 11 rotate in opposite directions. The synergistic effect of the pressure rollers 12 and the support rollers 11 applies an active and controllable bending moment to the heated and softened glass, allowing the glass to be pressed more precisely into a preset curvature, significantly reducing shape deviations and springback effects. Furthermore, the pressure rollers 12 and the support rollers 11 form a stable linear clamping grip on the glass, greatly limiting any vertical jump, lateral drift, or self-vibration that may occur during conveying, forming, and cooling. This rigid constraint ensures that the glass can be cooled in a stable shape after bending, thereby guaranteeing the high flatness and optical consistency of the final product.

[0038] In some embodiments, the cooling device further includes a control structure (not shown) communicatively connected to the conveying structure 10. The control structure controls the forward or reverse rotation of the support roller 11 and the pressure roller 12. Understandably, for glass with uneven thickness, deep bends, or complex curvatures, a single cooling operation often fails to achieve uniform cooling and tempering. By controlling the forward and reverse rotation of the support roller 11 and the pressure roller 12, the glass can undergo multiple reciprocating movements within the cooling area, thereby achieving more uniform cooling. In this embodiment, during the glass conveying process, the glass undergoes a first forming, followed by reciprocating movement to cool it.

[0039] In some embodiments, the control valve 40 is a solenoid valve or a pneumatic valve. Understandably, the solenoid valve is directly driven by an electrical signal, while the pneumatic valve is driven by an electro-pneumatic component. Both the solenoid and pneumatic valves open and close in milliseconds, instantly responding to commands from the control unit. This extremely high response speed ensures that the control system can switch airflow almost in real-time and rapidly according to cooling requirements, thereby achieving precise and timely control of the cooling area and avoiding control lag and uneven cooling caused by valve action delays.

[0040] In some embodiments, the blowing structure 20 includes a bellows 21 with an inner cavity 211 and a fan 22 communicating with the inner cavity 211. The fan 22 is used to draw external gas into the inner cavity 211. The bellows 21 has an air outlet surface facing the conveying structure 10, and the air outlet surface is provided with a plurality of air holes 212 communicating with the inner cavity 211. The air holes 212 are connected to the ventilation duct 31. In this embodiment, the inner cavity 211 of the bellows 21 can effectively buffer the pulsating airflow generated by the fan 22, transforming the unstable incoming flow into a pressure-uniform and stable air source. Subsequently, the airflow is evenly distributed to each ventilation duct 31 through the plurality of air holes 212. This ensures that each ventilation duct 31 receives an airflow with a basically uniform initial pressure, fundamentally eliminating the cooling difference caused by uneven air source pressure, making the subsequent precise zoning adjustment achieved by the control valve 40 more effective and reliable.

[0041] Optionally, the blowing structure 20 also includes a filter 23 connected to the fan 22. The filter 23 is in communication with the fan 22 and is used to filter the gas entering the fan 22. By setting the filter 23, impurities in the gas entering the air box 21 can be removed, ensuring that the surface of the part to be cooled 200 is relatively clean, meeting the production process requirements, and providing a clean part to be cooled 200 for the next production process.

[0042] This utility model also proposes a glass production line, which includes a cooling device. The specific structure of the cooling device is as described in the above embodiments. Since this glass production line adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] In summary, the cooling device provided in this application embodiment can selectively open each ventilation duct 31 by switching the control valve 40 to the start or stop state as needed. When the control valve 40 is in the start state, airflow blows through the ventilation duct 31 towards the component 200 to be cooled; when the control valve 40 is in the stop state, the control valve 40 closes the ventilation duct 31, thereby blocking the airflow from blowing towards the component 200 to be cooled. This allows for flexible control of the airflow, adapting to components 200 with different cooling intensity requirements, without the need to replace the cooling device for a specific component 200, thus improving the applicability of the cooling device. Furthermore, this application embodiment integrates the cooling function into the conveying path of the component 200 to be cooled, eliminating the need for separate conveying and cooling stations. This makes the structure of the cooling device more compact, which helps to reduce the space occupied by the cooling device.

[0044] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A cooling device for cooling a component (200) to be cooled, characterized in that, The cooling device includes: A conveying structure (10) is used to convey the part to be cooled (200); A blowing structure (20) is used to blow airflow; The air guiding structure (30) is provided with ventilation ducts (31), the two ends of which are respectively connected to the air blowing structure (20) and the conveying structure (10), and multiple ventilation ducts (31) are arranged at intervals; and A control valve (40) is provided in the ventilation duct (31). Multiple control valves (40) are arranged at intervals, and each control valve (40) corresponds to each ventilation duct (31). Each control valve (40) has an open state and a closed state. When the control valve (40) is in the open state, the airflow blows through the ventilation duct (31) toward the part to be cooled (200). When the control valve (40) is in the closed state, the control valve (40) closes the ventilation duct (31) to block the airflow from blowing toward the part to be cooled (200).

2. The cooling device as described in claim 1, characterized in that: Along the direction of the air blowing structure (20) pointing towards the part to be cooled (200), the distance between two adjacent ventilation ducts (31) gradually increases.

3. The cooling device as described in claim 1, characterized in that: The conveying structure (10) has a conveying surface (14) for supporting the part to be cooled (200), the conveying surface (14) being a curved surface with a preset curvature, so as to bend and shape the heated and softened part to be cooled (200) when conveying it.

4. The cooling device as described in claim 3, characterized in that: Each of the ventilation ducts (31) is arranged radially along the curved surface.

5. The cooling device as described in claim 3, characterized in that: The conveying structure (10) includes a rotatably arranged support roller (11), which is used to support the part to be cooled (200). Multiple support rollers (11) are arranged at intervals, and the contact surface of each support roller (11) and the part to be cooled (200) together constitute the conveying surface (14).

6. The cooling device as described in claim 5, characterized in that: The conveying structure (10) further includes a rotating pressure roller (12), a plurality of pressure rollers (12) are arranged at intervals, each pressure roller (12) corresponds to each support roller (11), and a channel (13) is formed between the pressure roller (12) and the support roller (11) for the part to be cooled (200) to pass through. The rotation direction of the pressure roller (12) and the support roller (11) is opposite.

7. The cooling device as described in claim 6, characterized in that: The cooling device also includes a control structure that is communicatively connected to the conveying structure (10). The control structure is used to control the support roller (11) to rotate forward or backward, and the control structure is used to control the pressure roller (12) to rotate forward or backward.

8. The cooling device as described in any one of claims 1 to 7, characterized in that: The control valve (40) is a solenoid valve or a pneumatic valve.

9. The cooling device according to any one of claims 1 to 7, characterized in that: The blowing structure (20) includes a bellows (21) having an inner cavity (211) and a fan (22) communicating with the inner cavity (211). The fan (22) is used to draw external gas into the inner cavity (211). The bellows (21) has an air outlet facing the conveying structure (10). The air outlet is provided with a plurality of air holes (212) communicating with the inner cavity (211). The air holes (212) are communicating with the ventilation duct (31).

10. A glass production line, characterized in that, Includes the cooling device as described in any one of claims 1-9.

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