Ventilation and heat dissipation structure of factory building

Abstract

The ventilation and heat dissipation structure is provided with a backflow blocking plate, and the two ends of the backflow blocking plate in the length direction are adjacent to the inner wall faces of the third side wall and the fourth side wall of the plant respectively. The backflow blocking plate is provided with a transverse plate part and a straight plate part, one side of the transverse plate part is fixed to the inner wall face of the first side wall, and the other side of the transverse plate part is combined with the straight plate part. The bottom edge of the straight plate part is higher than the top horizontal height of the at least one air inlet, and the height difference between the bottom edge of the straight plate part and the top horizontal height of the at least one air inlet ranges from 0 cm to 75 cm; therefore, when air is input into the at least one air inlet, passes through the lower part of the bottom edge of the straight plate part and generates rewound backflow, the backflow can be blocked above the transverse plate part, meanwhile, airflow below the transverse plate part can flow smoothly, and then hot air is discharged through the at least one air outlet.

Description

Technical Field

[0001] This invention relates to a ventilation and heat dissipation structure for a factory building, and more particularly to a structure that allows airflow to flow smoothly to effectively remove heat from the factory building. Background Technology

[0002] In traditional factories, to enhance heat dissipation, multiple self-rotating fans are typically installed on the roof to expel hot air and provide shelter from rain; or a series of fans are hung above workers in the work area or placed below body height to expel hot air and cool them. However, traditional cooling methods fail to address the details of fluid flow. When air is drawn into the factory through windows, a "mixing layer" of airflow flows upwards, creating a turbulent three-dimensional flow field with "return zones" and "low-speed zones." This causes warm air from the upper layer to mix with cool air from the lower layer, ultimately raising the temperature in the work area and making the factory stuffy and windless. Even with the addition of multiple fans to increase airflow, the airflow pattern and temperature distribution remain unchanged, resulting in a stuffy, windless factory that wastes energy and increases noise.

[0003] To address the aforementioned issues, a solution is proposed in Taiwan's Patent Application No. I798014, "Factory Building Heat Dissipation Structure." This solution primarily comprises a plurality of airflow control plates, spaced apart with at least one air inlet facing at least one exhaust outlet. Each airflow control plate is a long, downward-extending piece from the roof, and a long groove is formed between them. This "horizontal flow field" configuration allows for smooth airflow for heat dissipation. However, installing multiple large, enclosed airflow control plates under the roof results in a complex overall structure, increasing material and construction costs and cutting into and compressing factory space. Summary of the Invention

[0004] In view of this, in order to provide a structure different from conventional technology and to improve the above-mentioned disadvantages, the purpose of this invention is to provide a ventilation and heat dissipation structure for a factory building. This structure solves the problem that conventional factory buildings have multiple large-area and enclosed airflow control panels installed under the roof, which makes the overall structure complex, increases material and construction costs, and cuts and compresses the factory space. Instead, a backflow barrier plate is fixed on the inner wall of a first side wall. This allows the air entering from at least one air inlet to pass under the bottom edge of a vertical plate and generate a backflow. The backflowing air is blocked above a horizontal plate, thereby allowing the heat dissipation airflow to flow smoothly. This simplifies equipment, saves costs, makes the space more complete, reduces the feeling of oppression, and improves the quality of the working environment.

[0005] To achieve the above objectives, the present invention provides a ventilation and heat dissipation structure for a factory building. The factory building includes a roof and a first side wall, a third side wall, a second side wall, and a fourth side wall arranged sequentially below the roof. The first side wall is parallel to the second side wall, and the roof, first side wall, third side wall, second side wall, and fourth side wall together enclose an interior space. The lower half of the first side wall has at least one horizontally extending air inlet, and the lower half of the second side wall has at least one horizontally extending exhaust outlet, allowing air to be input through the at least one air inlet and hot air to be discharged through the at least one exhaust outlet. Its main technical feature is that the ventilation and heat dissipation structure of the factory building has a long strip-shaped return flow barrier plate, the length of which is... One end of the backflow baffle is adjacent to the inner wall surface of the third side wall, and the other end of the backflow baffle is adjacent to the inner wall surface of the fourth side wall. The backflow baffle has a horizontal plate portion and a vertical plate portion. One edge of the horizontal plate portion is fixed to the inner wall surface of the first side wall, and the horizontal plate portion extends toward the second side wall. The other edge of the horizontal plate portion is joined to the vertical plate portion. The bottom edge of the vertical plate portion is higher than the top horizontal level of at least one air inlet, and the height difference between the bottom edge of the vertical plate portion and the top horizontal level of at least one air inlet is between 0 and 75 cm. This is so that when the air input from at least one air inlet passes below the bottom edge of the vertical plate portion and generates a backflow, the backflowing air is blocked above the horizontal plate portion.

[0006] During implementation, the height difference between the bottom edge of the straight plate and the top edge of at least one air inlet is between 0 and 47 cm.

[0007] During implementation, the other edge of the horizontal plate is joined to the bottom edge of the vertical plate.

[0008] During implementation, the other edge of the horizontal plate is joined to the top edge of the vertical plate.

[0009] During implementation, the other edge of the horizontal plate is joined to the horizontal middle section of the vertical plate.

[0010] During implementation, the distance between the other edge of the horizontal plate and the inner wall surface of the first side wall is L, where L < 30m.

[0011] In practice, the present invention further includes at least one airflow control plate, at least one airflow control plate parallel to a backflow barrier plate, one end of the long direction of the at least one airflow control plate adjacent to the inner wall surface of the third side wall, and the other end of the long direction of the at least one airflow control plate adjacent to the inner wall surface of the fourth side wall.

[0012] In practice, at least one airflow control panel is an elongated piece, and at least one airflow control panel has at least one notch between its top edge and the roof.

[0013] In practice, there is an elongated notch between the top edge of any airflow control panel and the roof, and the long direction of the notch is parallel to the long direction of the airflow control panel.

[0014] During implementation, the bottom edge of any airflow control panel is at the same height as the bottom edge of the straight plate.

[0015] To further understand the present invention, preferred embodiments are listed below, and the specific composition and effects achieved by the present invention are described in detail below with reference to the accompanying drawings and reference numbers. Attached Figure Description

[0016] Figure 1 This is a three-dimensional appearance diagram of a preferred embodiment of the present invention.

[0017] Figure 2 for Figure 1 Side sectional view.

[0018] Figure 3 This is a side cross-sectional view of the other side edge of the horizontal plate portion of the present invention when it is joined to the bottom edge of the straight plate portion.

[0019] Figure 4 This is a side cross-sectional view of the horizontal plate portion of the present invention when it is joined to the horizontal middle section of the straight plate portion at the other side edge.

[0020] Figure 5 This is a schematic diagram illustrating the usage state of a preferred embodiment of the present invention.

[0021] Figure 6 The present invention provides velocity vectors, streamlines, and temperature distribution diagrams of the xz cross sections in segments (a), (b), and (c) based on the results of CFD computer program analysis and calculation when multiple airflow control plates are not set.

[0022] Figure 7 The present invention uses CFD computer program analysis and calculation results to show the velocity vector, streamlines and temperature distribution of the xz section in segments (a), (b) and (c) when a backflow barrier plate and an airflow control plate are set at the same time.

[0023] Explanation of reference numerals in the attached drawings: 1- Ventilation and heat dissipation structure of the factory building; 2- Factory building; 21- Roof; 22- First side wall; 23- Third side wall; 24- Second side wall; 25- Fourth side wall; 26- Indoor space; 3- Air inlet; 31- Work area; 4- Exhaust outlet; 5- Backflow baffle; 51- Horizontal plate section; 52- Vertical plate section; 6- Airflow control plate; 61- Notch; L- Length of the horizontal plate section; H- Height difference between the bottom edge of the vertical plate section and the top horizontal level of at least one air inlet; H V - Height distance of the top notch on the airflow control panel; H P - Height distance of the airflow control panel. Detailed Implementation

[0024] This invention provides a ventilation and heat dissipation structure for a factory building. The factory building mainly includes a roof and a first side wall, a third side wall, a second side wall, and a fourth side wall arranged sequentially below the roof. The first side wall is parallel to the second side wall, and the roof, the first side wall, the third side wall, the second side wall, and the fourth side wall together enclose an indoor space. The lower half of the first side wall has at least one horizontally extending air inlet, and the lower half of the second side wall has at least one horizontally extending exhaust outlet. The ventilation and heat dissipation structure of the factory building includes a return flow barrier plate. One end of the return flow barrier plate is adjacent to the inner wall surface of the third side wall, and the other end of the return flow barrier plate is adjacent to the fourth side wall. The interior wall surface; and the backflow barrier has a horizontal plate portion and a vertical plate portion, one side edge of the horizontal plate portion is fixed to the interior wall surface of the first side wall, and the other side edge of the horizontal plate portion is combined with the vertical plate portion; the bottom edge of the vertical plate portion is higher than the top horizontal level of at least one air inlet, and the height difference between the bottom edge of the vertical plate portion and the top horizontal level of at least one air inlet is between 0 and 75 cm; thereby, when the air input from at least one air inlet passes below the bottom edge of the vertical plate portion and generates a backflow, the backflowing air is blocked above the horizontal plate portion, while the airflow below the horizontal plate portion can flow smoothly, and then the hot air is discharged through at least one exhaust port.

[0025] Please see Figure 1 , Figure 2 As shown, this is a preferred embodiment of the ventilation and heat dissipation structure 1 for a factory building of the present invention, which is to be installed inside a factory building 2 and on various walls. The factory building 2 includes a roof 21 and a first side wall 22, a third side wall 23, a second side wall 24 and a fourth side wall 25 arranged sequentially and continuously around the roof 21. The four side walls form a rectangle and together with the roof 21, they form an interior space 26. The first side wall 22 and the second side wall 24 are parallel to each other, and the third side wall 23 and the fourth side wall 25 are parallel to each other.

[0026] This invention provides a ventilation and heat dissipation structure 1 for a factory building, mainly comprising a plurality of air inlets 3, a plurality of exhaust outlets 4, a return flow baffle 5, and a plurality of airflow control plates 6. The plurality of air inlets 3 are arranged in a rectangular array extending laterally in the lower half of the first side wall 22, and each air inlet 3 is an openable window, allowing air from outside the factory building 2 to enter the work area 31 of the factory building 2. In practice, the air inlets 3 can also be a single horizontal window or two rows of horizontal windows arranged vertically. Multiple exhaust ports 4 are horizontally extended in the lower half of the second side wall 24, and the exhaust ports 4 are fans. In practice, the exhaust ports 4 can also be horizontal air outlets connected to the air extraction equipment. The exhaust center height of the multiple exhaust ports 4 is between the center height and the top height of the multiple air inlets 3. That is, the exhaust center height of the multiple exhaust ports 4 is higher than the center height of the multiple air inlets 3, and lower than the top height of the multiple air inlets 3, so that cold air can enter the indoor space 26 through the multiple air inlets 3 and then exhaust hot air out through the multiple exhaust ports 4.

[0027] The reflux baffle 5 is a long strip with an inverted L-shaped cross-section. It is horizontally suspended in the interior space 26 of the factory building 2. One end of the reflux baffle 5 is adjacent to the inner wall of the third side wall 23, and the other end is adjacent to the inner wall of the fourth side wall 25. The reflux baffle 5 has a horizontal plate 51 and a vertical plate 52 that are perpendicular to each other. The horizontal plate 51 is a long flat plate, and the vertical plate 52 is a long vertical plate. One edge of the horizontal plate 51 is fixed to the inner wall of the first side wall 22. The horizontal plate 51 extends towards the second side wall 24, and the other edge of the horizontal plate 51 is joined to the top edge of the vertical plate 52. The distance between the other edge of the horizontal plate 51 and the inner wall of the first side wall 22 is L, where L < 30m. Alternatively, it can be implemented as follows... Figure 3 , Figure 4 As shown, the other edge of the horizontal plate portion 51 is joined to the bottom edge of the vertical plate portion 52, or to the horizontal middle section of the vertical plate portion 52. The bottom edge of the vertical plate portion 52 is higher than the top horizontal height of at least one air inlet 3, and the height difference between the bottom edge of the vertical plate portion 52 and the top horizontal height of at least one air inlet 3 is H, where H is between 0 and 75 cm. In practice, a more preferred height difference H is between 0 and 47 cm.

[0028] Each of the plurality of airflow control panels 6 is a horizontally arranged elongated piece. In practice, the airflow control panel 6 can be made of a solid board, fabric, or plastic sheet. The plurality of airflow control panels 6 are arranged at intervals with at least one air inlet 3 facing at least one exhaust outlet 4. The plurality of airflow control panels 6 are parallel to the first side wall 22, the second side wall 24, and the backflow barrier 5, respectively. One end of each airflow control panel 6 in its longitudinal direction is adjacent to the inner wall surface of the third side wall 23, and the other end of each airflow control panel 6 in its longitudinal direction is adjacent to the inner wall surface of the fourth side wall 25. Each airflow control panel 6 has an elongated notch 61 between its top edge and the roof 21, with the longitudinal direction of the notch 61 parallel to the longitudinal direction of the airflow control panel 6. Furthermore, the bottom edge of each airflow control panel 6 has the same height as the bottom edge of the straight plate portion 52.

[0029] In this way, such as Figure 5 As shown, when the air outside the factory 2 enters the work area 31 of the indoor space 26 through at least one air inlet 3, the incoming air passes under the bottom edge of the straight plate 52, causing a small portion of the hot air to circulate back in the low-speed zone, while most of the hot air flows downstream of the work area 31 along with the air in the high-speed zone. At this time, the blockage of the horizontal plate 51 prevents the large backflow of hot air above the work area 31 from flowing back upstream. Instead, the hot air flows down through the gap between the first side wall 22 and the straight plate 52 to the work area 31, and then downstream of the work area 31. This prevents the small portion of the hot air from flowing back from mixing with the cool air entering the factory 2 from at least one air inlet 3 and then flowing downstream together, thus preventing the temperature of the work area 31 from rising. Furthermore, through the obstruction and guidance of multiple airflow control plates 6, the airflow can be drawn into the plant 2 from at least one air inlet 3 and then suppressed in the working area 31 below the bottom of the multiple airflow control plates 6, and travel evenly to the downstream fan end. This reduces the defects of turbulent diffusion in the mixing layer and its gradual transmission downstream to the lower working area, thereby producing a better guiding effect in the middle and lower reaches of the working area 31, allowing most of the hot air to flow rapidly from the first side wall 22 toward the second side wall 24 along with the air in the high-speed zone.

[0030] Based on the structure of the above embodiment, without setting multiple airflow control panels 6, the present invention was simulated and tested in a typical factory building with a height of 9m, width of 50m, and length of 15m using the following parameters, and analyzed and calculated using a computer program of Computational Fluid Dynamics (CFD).

[0031] Total number of windows (air inlets): 70, 2 rows

[0032] Inlet wind speed at window (air inlet): 3.4 m / s

[0033] Length (L) of the horizontal section: 3m

[0034] Height difference (H) between the bottom edge of the straight section and the top horizontal level of at least one air intake: 40cm; Total number of fans (exhaust ports): 31, 1 row

[0035] Single fan (exhaust port) airflow: 687 CMM

[0036] Axial air velocity at the outlet of a single fan (exhaust port): 7.4 m / s

[0037] Total airflow of multiple fans (exhaust vents): 21297 CMM

[0038] The results of CFD computer program analysis and calculation are as follows: velocity vector, streamlines, and temperature distribution diagram are... Figure 6 The xz sections in segments (a), (b), and (c) are shown. Arrows represent velocity vectors, and the black lines along the tangent to the velocity vectors represent streamlines. Colored areas represent temperature levels; the roof is designated at 60°C, with red representing the highest temperature (the temperature inside the roof is designated as 60°C), followed by brown, yellow, light green, bright green, light blue, and finally dark blue (dark blue represents the atmospheric temperature, designated as 29°C). The velocity vectors and streamlines in the work area show almost parallel flow from left to right, with no backflow or low-speed zones. The colored temperature distribution shows that in the downstream area, below 3 meters above the floor, the airflow temperature is at most about 0.1–0.2°C higher than the atmospheric temperature, while within the work area, it remains almost at atmospheric temperature (dark blue), indicating that the high-temperature air above is not drawn into the work area, effectively reducing the temperature in work area 31.

[0039] With a backflow baffle plate 5 and an airflow control plate 3, the present invention was simulated and tested in a typical factory building with a height of 9m, width of 50m and length of 112m using the following parameters, and analyzed and calculated using a computer program of Computational Fluid Dynamics (CFD).

[0040] Total number of windows (air inlets): 70, 2 rows

[0041] Inlet wind speed at window (air inlet): 3.4 m / s

[0042] Length (L) of the horizontal section: 3m

[0043] The distance between the other edge of the horizontal section and the airflow control panel: 50m

[0044] Hole ratio of the airflow control panel: 0.8

[0045] Height difference (H) between the bottom edge of the straight section and the top horizontal level of at least one air intake: 40cm; Total number of fans (exhaust ports): 31, 1 row

[0046] Single fan (exhaust port) airflow: 687 CMM

[0047] Axial air velocity at the outlet of a single fan (exhaust port): 7.4 m / s

[0048] Total airflow of multiple fans (exhaust vents): 21297 CMM

[0049] The height distance of the top notch 61 of the airflow control panel 6 is H. V The height distance of the airflow control panel 6 is H. P Hollow ratio = H V / (H V +H P The results of CFD computer program analysis and calculation show that the velocity vector, streamlines, and temperature distribution diagram are as follows: Figure 7 The xz sections in segments (a), (b), and (c) are shown. Arrows represent velocity vectors, and the black lines along the tangent of the velocity vectors represent streamlines. Colored areas represent temperature levels, with the roof designated at 60°C. Red represents the highest temperature (the temperature inside the roof is designated as 60°C), followed by brown, yellow, light green, bright green, light blue, and dark blue (dark blue represents the atmospheric temperature, designated as 29°C). The velocity vector and streamlines in the work area show an almost parallel flow from left to right. This means that after the airflow enters the plant and passes through the return flow baffle 5, it is suppressed in the work area 31 below the bottom of multiple airflow control plates 6 and travels evenly downstream towards the fan. The colored temperature distribution shows that in the downstream area, below 3 meters from the floor, the airflow temperature is at most about 0.1–0.2°C higher than the atmospheric temperature. Within the work area, it maintains almost the atmospheric temperature (dark blue), indicating that the high-temperature air above is not drawn into the work area, effectively reducing the temperature of work area 31.

[0050] In summary, based on the above-disclosed content, the present invention can indeed achieve the intended purpose, providing a structure in which a backflow baffle is fixed on the inner wall of a first side wall. This allows air entering from at least one air inlet to pass below the bottom edge of a straight plate and generate a backflow, while the backflowing air is blocked above a horizontal plate, thereby ensuring smooth airflow for heat dissipation. This simplifies equipment, saves costs, makes the space more complete, reduces the feeling of oppression, and improves the quality of the working environment. Furthermore, by arranging a plurality of airflow control plates at intervals, with each plate parallel to the first side wall, the second side wall, and the backflow baffle, and the bottom edge of any airflow control plate having the same height as the bottom edge of the straight plate, the airflow entering the workshop and passing through the backflow baffle is suppressed within the working area below the plurality of airflow control plates and evenly travels downstream towards the fan end, achieving the effect of ventilation and heat dissipation.

Claims

1. A ventilation and heat dissipation structure for a factory building, the factory building comprising a roof and a first side wall, a third side wall, a second side wall, and a fourth side wall arranged sequentially below the roof, the first side wall being parallel to the second side wall, and the roof, the first side wall, the third side wall, the second side wall, and the fourth side wall collectively enclosing an indoor space; the lower half of the first side wall is provided with at least one horizontally extending air inlet, and the lower half of the second side wall is provided with at least one horizontally extending exhaust outlet, for air to be input through the at least one air inlet and for hot air to be discharged through the at least one exhaust outlet; characterized in that: The ventilation and heat dissipation structure of the factory building has a long strip-shaped backflow baffle. One end of the backflow baffle is adjacent to the inner wall of the third side wall, and the other end is adjacent to the inner wall of the fourth side wall. The backflow baffle has a horizontal plate portion and a vertical plate portion. One edge of the horizontal plate portion is fixed to the inner wall of the first side wall, and the horizontal plate portion extends toward the second side wall. The other edge of the horizontal plate portion is joined to the vertical plate portion. The bottom edge of the vertical plate portion is higher than the top horizontal level of the at least one air inlet, and the height difference between the bottom edge of the vertical plate portion and the top horizontal level of the at least one air inlet is between 0 and 75 cm. This allows the backflowing air to be blocked above the horizontal plate portion when the air input through the at least one air inlet passes below the bottom edge of the vertical plate portion and generates a backflow.

2. The ventilation and heat dissipation structure of the factory building as described in claim 1, characterized in that: The height difference between the bottom edge of the straight plate and the top edge of the at least one air inlet is between 0 and 47 cm.

3. The ventilation and heat dissipation structure of the factory building as described in claim 1, characterized in that: The other edge of the horizontal plate joins the bottom edge of the vertical plate.

4. The ventilation and heat dissipation structure of the factory building as described in claim 1, characterized in that: The other side edge of the horizontal plate joins the top edge of the vertical plate.

5. The ventilation and heat dissipation structure of the factory building as described in claim 1, characterized in that: The other edge of the horizontal plate joins the horizontal middle section of the vertical plate.

6. The ventilation and heat dissipation structure of the factory building as described in claim 1, characterized in that: The distance between the other edge of the horizontal plate and the inner wall surface of the first side wall is L, where L < 30m.

7. The ventilation and heat dissipation structure of the factory building as described in any one of claims 1 to 6, characterized in that: It also includes at least one airflow control plate, which is parallel to the backflow barrier plate. One end of the at least one airflow control plate in the longitudinal direction is adjacent to the inner wall surface of the third side wall, and the other end of the at least one airflow control plate in the longitudinal direction is adjacent to the inner wall surface of the fourth side wall.

8. The ventilation and heat dissipation structure of the factory building as described in claim 7, characterized in that: Any of the at least one airflow control panel is an elongated piece, and the top edge of the at least one airflow control panel has at least one notch between it and the roof.

9. The ventilation and heat dissipation structure of the factory building as described in claim 8, characterized in that: Each of the airflow control panels has an elongated notch between its top edge and the roof, and the length of the notch is parallel to the length of the airflow control panel.

10. The ventilation and heat dissipation structure of the factory building as described in claim 8, characterized in that: The bottom edge of any of the airflow control panels has the same height as the bottom edge of the straight plate.

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