Air distribution system capable of adjusting air volume

Abstract

The utility model belongs to the technical field of livestock and poultry breeding, and discloses an air distribution system capable of adjusting air volume, which comprises an air supply mechanism, a main pipeline is arranged at an air outlet of the air supply mechanism, the end part of the main pipeline is connected with a transverse pipe, a plurality of air distribution pipes are arranged on the transverse pipe along the width direction of a livestock and poultry house, and the length direction of the air distribution pipes is consistent with the length direction of the livestock and poultry house. One end of the air distribution pipe is communicated with a pipe cavity of the transverse pipe, the other end of the air distribution pipe is sealed, the air distribution pipe is internally divided into an upper air cavity and a lower air cavity, the upper air cavity and the lower air cavity are communicated at one end of the air distribution pipe far away from the transverse pipe, cavity switching lining cloth is arranged at the end of the lower air cavity close to the transverse pipe, and an air outlet is formed in the pipe wall of the air distribution pipe corresponding to the lower air cavity. In cold winter, fresh air flows in from the upper air cavity, exchanges heat with the environment in the livestock and poultry house and then is exhausted from the air outlet of the lower air cavity, so that the fresh air is preheated, the cold stress of livestock and poultry is effectively reduced, and the comfort level of the livestock and poultry is improved. In spring and autumn, the cavity switching lining cloth is opened, air can enter the whole air distribution pipe, and the requirement for the large air inlet amount is met.

Description

Technical Field

[0001] The utility model relates to the technical field of livestock and poultry breeding, in particular to an air distribution system with adjustable air volume. Background Art

[0002] In modern farming models, fresh air must be continuously introduced into livestock and poultry houses to provide the oxygen necessary for their survival. However, in winter and in cold regions, outdoor temperatures can reach around -30°C, far below the ideal temperature for livestock growth. Directly introducing outdoor air into livestock and poultry houses as fresh air can cause cold stress in the livestock and poultry, impacting their growth and reproduction. Therefore, preheating of the fresh air is essential. In spring and autumn, as the outside temperature rises, a higher volume of fresh air is required for air exchange.

[0003] While existing fresh air preheating technologies, such as electric heaters and gas boilers, can provide fresh air at the appropriate temperature for livestock and poultry houses, they consume significant energy. This can lead to significant temperature fluctuations, large temperature swings, and drastic variations in air quality within the house, making it difficult to maintain a temperature-appropriate, energy-efficient, and safe growth environment. Effectively regulating air volume is also challenging. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an air distribution system with adjustable air volume.

[0005] The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: an adjustable air volume air distribution system, comprising an air supply mechanism arranged outside a livestock and poultry house, a main duct being arranged at the air outlet of the air supply mechanism, the main duct extending into the livestock and poultry house and connected to a transverse pipe at the end, a plurality of air distribution pipes being arranged on the transverse pipe along the width direction of the livestock and poultry house, the length direction of the air distribution pipe being consistent with the length direction of the livestock and poultry house, the transverse pipe and the air distribution pipe being arranged on the top of the livestock and poultry house, one end of the air distribution pipe being connected to the transverse pipe cavity and the other end being sealed, the air distribution pipe being divided into an upper air cavity and a lower air cavity, the upper air cavity and the lower air cavity being connected at the end of the air distribution pipe away from the transverse pipe, and an air outlet being provided on the air distribution pipe wall corresponding to the lower air cavity.

[0006] By adopting the above technical scheme, an air supply mechanism, a main duct, a cross duct, and an air distribution duct are set up, and the air distribution duct is divided into an upper air cavity and a lower air cavity connected at the end away from the air inlet, and an air outlet is opened on the wall of the air distribution duct corresponding to the lower air cavity. In this way, the fresh air sent in by the air supply mechanism enters the air distribution duct through the main duct and the cross duct, and the fresh air is first allowed to flow from the upper air cavity of the air distribution duct to the sealed end of the air distribution duct, and then enter the lower air cavity, and is discharged from the air outlet while flowing in the lower air cavity. In this way, the fresh air needs to flow once along the length direction of the livestock and poultry house along the upper air cavity. At this time, the fresh air in the upper air cavity can exchange heat with the environment inside the livestock and poultry house through the wall of the air distribution duct, and the temperature inside the livestock and poultry house is used to preheat the fresh air. In this way, when the fresh air reaches the lower air cavity, its temperature can reach a temperature close to that inside the livestock and poultry house, thereby effectively reducing the cold stress of livestock and poultry and improving the comfort of livestock and poultry.

[0007] Furthermore, an intermediate mesh lining cloth is provided in the middle part of the tube cavity of the air distribution pipe along its length direction, the length of the intermediate mesh lining cloth is less than the length of the air distribution pipe and the end adjacent to the horizontal pipe is flush with the end of the air distribution pipe, the width of the intermediate mesh lining cloth is consistent with the diameter of the air distribution pipe and the two long sides are connected to the tube walls on both sides of the air distribution pipe, and a split lining cloth is also provided on the upper side of the intermediate mesh lining cloth, the length of the split lining cloth is consistent with the length of the intermediate mesh lining cloth and the width is equal to the arc length of the upper semicircle of the air distribution pipe, the split lining cloth divides the tube cavity of the air distribution pipe into an upper air cavity and a lower air cavity connected at the sealed end, and a semicircular cavity switching lining cloth 1 is provided at the end of the lower air cavity adjacent to the horizontal pipe, the bottom end of the cavity switching lining cloth 1 is fixedly connected to the air distribution pipe, and the edges of the cavity switching lining cloth 1 are respectively connected to the corresponding positions of the air distribution pipe and the split lining cloth by a zipper.

[0008] By adopting the above technical solution, an intermediate grid lining and a dividing lining are set, the air distribution duct can be divided into an upper air cavity and a lower air cavity, and then a cavity switching lining is set to seal the end of the lower air cavity adjacent to the horizontal tube, so that the fresh air first enters from the upper air cavity, then enters the lower air cavity from the sealed end of the air distribution duct, and finally is discharged along the air outlet; when a large air volume is needed in spring and autumn, the cavity switching lining can be opened by a zipper, so that the upper air cavity and the lower air cavity adjacent to the horizontal tube are all opened, thereby realizing air intake of the entire air distribution duct and increasing the air volume.

[0009] Furthermore, a middle partition lining cloth is provided on the upper part of the tube cavity of the air distribution pipe along its length direction. The length of the middle partition lining cloth is less than the length of the air distribution pipe and the end adjacent to the horizontal pipe is flush with the end of the air distribution pipe. The two long sides of the middle partition lining cloth are connected to the tube walls on both sides of the air distribution pipe to divide the tube cavity of the air distribution pipe into an upper air cavity and a lower air cavity connected at the sealed end. The width of the middle partition lining cloth is greater than the diameter of the air distribution pipe. The end of the lower air cavity adjacent to the horizontal pipe is provided with a cavity switching lining cloth 2, and the edges of the cavity switching lining cloth 2 are respectively connected to the corresponding positions of the air distribution pipe and the middle partition lining cloth by a zipper.

[0010] By adopting the above technical solution, an intermediate partition lining is set to divide the air distribution duct into an upper air cavity and a lower air cavity, and then a cavity switching lining cloth 2 is set to seal the end of the lower air cavity adjacent to the horizontal tube, so that the fresh air first enters from the upper air cavity, then enters the lower air cavity from the sealed end of the air distribution duct, and finally is discharged along the air outlet; when a large air volume is needed in spring and autumn, the cavity switching lining cloth 2 can be removed through a zipper, so that the upper air cavity and the lower air cavity adjacent to the horizontal tube are all opened, thereby realizing air intake of the entire air distribution duct and increasing the air volume.

[0011] Furthermore, the air outlets are provided in two rows along the length direction of the air distribution duct, and the hole cores of the two rows of air outlets are arranged at an angle to the horizontal plane.

[0012] By adopting the above technical solution, two rows of air outlets are set, and the hole cores of the air outlets are arranged at an angle to the horizontal plane, that is, the air outlets are set on the side instead of directly below, avoiding fresh air blowing directly from top to bottom.

[0013] Furthermore, the air supply mechanism includes a shell, and a filter cotton layer, a high-efficiency filter, a wet curtain system and an air supply fan are arranged in the shell in sequence from the air inlet side to the air outlet side.

[0014] By adopting the above technical solution, setting up a filter cotton layer, a high-efficiency filter, a wet curtain system and an air supply fan, the outside air can be filtered frequently. When the outside temperature is too high, the wet curtain system can be started to cool the outside air.

[0015] In summary, the present invention has the following beneficial effects: in the present application, an air supply mechanism, a main duct, a cross duct, and an air distribution duct are provided, and the air distribution duct is divided into an upper air cavity and a lower air cavity which are connected at one end away from the air inlet, and an air outlet is opened on the wall of the air distribution duct corresponding to the lower air cavity, so that the fresh air sent in by the air supply mechanism enters the air distribution duct through the main duct and the cross duct, and the fresh air is first allowed to flow from the upper air cavity of the air distribution duct to the sealed end of the air distribution duct, and then enter the lower air cavity, and be discharged from the air outlet while flowing in the lower air cavity. In this way, the fresh air needs to flow once along the length direction of the livestock and poultry house along the upper air cavity. At this time, the fresh air in the upper air cavity can exchange heat with the environment inside the livestock and poultry house through the wall of the air distribution duct, and use the temperature inside the livestock and poultry house to preheat the fresh air. In this way, when the fresh air reaches the lower air cavity, its temperature can reach a temperature close to that inside the livestock and poultry house, thereby effectively reducing the cold stress of livestock and poultry and improving the comfort of livestock and poultry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0017] Figure 2 This is a structural diagram of the air supply mechanism of an embodiment of the utility model;

[0018] Figure 3This is a structural diagram of the air distribution duct according to an embodiment of the present utility model;

[0019] Figure 4 This is a cross-sectional view of the air distribution duct of Example 1 of the present utility model;

[0020] Figure 5 This is a schematic cross-sectional view of the air distribution duct of Example 1 of the utility model when working in winter or cold areas;

[0021] Figure 6 This is a schematic cross-sectional view of the air distribution duct in Example 1 of the utility model when working in spring and autumn;

[0022] Figure 7 This is a cross-sectional view of the air distribution duct of Example 2 of the present utility model;

[0023] Figure 8 This is a schematic cross-sectional view of the air distribution duct of Example 2 of the present utility model when operating in winter or a cold area;

[0024] Figure 9 This is a schematic cross-sectional view of the air distribution duct in Example 2 of the utility model when working in spring and autumn.

[0025] In the figure: 10, air supply mechanism; 11, shell; 12, filter cotton layer; 13, high-efficiency filter; 14, wet curtain system; 15, air supply fan; 20, main duct; 21, horizontal pipe; 30, air distribution duct; 31, upper air cavity; 32, lower air cavity; 33, air outlet; 34, middle grid lining; 35, dividing lining; 36, cavity switching lining 1; 37, middle partition lining; 38, cavity switching lining 2. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] Example 1

[0028] like Figure 1-4As shown, the embodiment of the present application discloses an adjustable air volume air distribution system, including an air supply mechanism 10, a main duct 20, a cross pipe 21 and an air distribution duct 30. The air supply mechanism 10 includes a shell 11, in which a filter cotton layer 12, a high-efficiency filter 13, a wet curtain system 14 and an air supply fan 15 are arranged in sequence from the air inlet side to the air outlet side. The filter cotton layer 12 is composed of primary filter cotton and stainless steel wire mesh, which performs preliminary filtration on the outside air; the high-efficiency filter 13 filters the outside air again; the wet curtain system 14 is equipped with a water inlet system and a water replenishment system. When the outside temperature is too high, the wet curtain system 14 can be started to cool the outside air; two air supply fans 15 are provided, which are used to suck in the outside air and blow it into the duct. The main duct 20 is connected to the two air supply fans 15, and its air outlet end extends to the top of the livestock and poultry house near the end of the air supply mechanism 10. The outlet end of the main duct 20 connects to a transverse duct 21, which runs the width of the livestock house. Several outlet ducts are installed along the width of the livestock house. These outlet ducts are connected to an air distribution duct 30. One end of the air distribution duct 30 communicates with the lumen of the transverse duct 21 through the outlet duct, while the other end is sealed. The air distribution duct 30 runs the length of the livestock house and is located at the top of the house to distribute fresh air throughout the entire building.

[0029] Specifically, the air distribution duct 30 is made of a fiber cloth tube, and its length is determined by the length of the livestock and poultry house. It is made of a full-length tube and does not require a zipper connection in the middle. In this embodiment, the length of the air distribution duct 30 is set to 36m and the diameter is 650mm. Two rows of air outlets 33 are opened on the tube wall of the lower semicircle of the air distribution duct 30, and the opening diameter of the air outlet 33 is 50mm. Each row of air outlets 33 is arranged along the length of the air distribution duct 30, and the hole core of the two rows of air outlets 33 is at an angle of 30° to the horizontal plane, so that fresh air is blown out from both sides of the tube wall of the lower semicircle of the air distribution duct 30, avoiding fresh air blowing directly from directly above the livestock and poultry. To ensure uniform ventilation throughout the livestock and poultry house, the spacing between the air outlets 33 is designed to be inconsistent. Specifically, the spacing between the hole cores of two adjacent air outlets 33 in the front 22.5m from the sealed end to the end adjacent to the horizontal tube 21 is 330mm, and the spacing between the hole cores of two adjacent air outlets 33 in the rear 13.5m is 200mm. That is, along the direction of fresh air flow, the spacing is first large and then small, that is, the spacing is large when the air volume is large in the front section, and the spacing is small when the air volume is small in the back section, thereby ensuring uniform ventilation.

[0030] During installation, a central mesh lining 34 is installed along the length of the air distribution duct 30. The length of the central mesh lining 34 is shorter than the length of the air distribution duct 30, and in this embodiment, is set to 35 meters. The end of the central mesh lining 34, which is adjacent to the transverse tube 21, is flush with the end of the air distribution duct 30, ensuring a certain distance between the end of the central mesh lining 34, which is distal to the transverse tube 21, and the sealed end of the air distribution duct 30. The width of the central mesh lining 34 matches the diameter of the air distribution duct 30, and its two long sides are connected to the walls of the air distribution duct 30. This tightens the central mesh lining 34 and divides the air distribution duct 30 into two sections, upper and lower. The central mesh lining 34 is a mesh with ventilation holes, which does not affect the ventilation of the upper and lower sections.

[0031] A split lining cloth 35 is also provided on the upper side of the middle mesh lining cloth 34. The length of the split lining cloth 35 is consistent with the length of the middle mesh lining cloth 34. The end of the split lining cloth 35 adjacent to the horizontal tube 21 is flush with the end of the middle mesh lining cloth 34. The width of the split lining cloth 35 is equal to the arc length of the upper semicircle of the air distribution duct 30. The two long sides of the split lining cloth 35 are connected to the two long sides of the middle mesh lining cloth 34 by a zipper. The split lining cloth 35 is not ventilated, so the split lining cloth 35 is used to divide the tube cavity of the air distribution duct 30 into an upper air cavity 31 and a lower air cavity 32. Since the length of the split lining cloth 35 is consistent with the length of the middle mesh lining cloth 34, there is a certain distance between it and the sealed end of the air distribution duct 30, so that the upper air cavity 31 and the lower air cavity 32 are connected at the sealed end of the air distribution duct 30. A semicircular cavity switching lining 1 36 is provided at the end of the lower air chamber 32 near the transverse tube 21. The bottom end of the cavity switching lining 1 36 is fixedly connected to the air distribution duct 30, and the edges of the cavity switching lining 1 36 are connected to the corresponding positions of the air distribution duct 30 and the split lining 35 via a zipper. The cavity switching lining 1 36 does not provide ventilation. When the cavity switching lining 1 36 is connected to the air distribution duct 30 and the split lining 35, the end of the lower air chamber 32 near the transverse tube 21 is blocked. During ventilation, fresh air from the outside can only enter from the upper air chamber 31, then flow along the upper air chamber 31 toward the sealed end of the air distribution duct 30. After reaching the sealed end, it flows into the lower air chamber 32, flows along the lower air chamber 32 toward the end near the transverse tube 21, and then flows into the livestock and poultry house through the air outlet 33.

[0032] During operation, in winter or cold areas, it is necessary to preheat the outside fresh air. The cavity switching lining cloth 1 36 is in a connected state, blocking the end of the lower air cavity 32 near the horizontal tube 21. The outside fresh air can only enter from the upper air cavity 31. Under the action of wind, the dividing lining cloth 35 will droop and spread on the middle grid lining cloth 34. Figure 5As shown, the fresh air then flows along the upper air cavity 31 toward the sealed end of the air distribution duct 30, and exchanges heat with the environment in the livestock and poultry house during circulation. Since the length of the air distribution duct 30 is 36m and the length of the middle mesh lining 34 is 35m, the outside fresh air continuously exchanges heat with the environment in the livestock and poultry house during the 35m flow path, so that the temperature of the outside fresh air can be continuously increased to be close to the ambient temperature in the livestock and poultry house, and then flows into the livestock and poultry house from the air outlet 33 on the lower air cavity 32, avoiding cold stress on the livestock and poultry and ensuring a suitable environment for the growth of livestock and poultry.

[0033] In spring and autumn, as the outside temperature rises, the demand for fresh air in the livestock and poultry house gradually increases, and a large amount of fresh air needs to be introduced through the air distribution duct 30. At this time, the zipper between the cavity switching lining cloth 36 and the air distribution duct 30 and the dividing lining cloth 35 can be unzipped, so that the end of the lower air cavity 32 near the horizontal tube 21 is opened. When the air supply mechanism 10 supplies air, the bottom end of the cavity switching lining cloth 36 is fixed to the air distribution duct 30, so that the cavity switching lining cloth 36 is blown into the air distribution duct 30 under the action of wind and sticks to the lower tube wall of the air distribution duct 30, and does not cause blockage to the lower air cavity 32; and the dividing lining cloth 35 will be blown upward under the action of wind and stick to the upper tube wall of the air distribution duct 30, forming a semicircle with the opening downward, so that the upper air cavity 31 and the lower air cavity 32 are connected to form an approximately full circle, such as Figure 6 As shown, this is equivalent to the entire air distribution duct 30 directly taking in air and then discharging the air through the air outlet 33, which greatly increases the air intake volume.

[0034] Example 2

[0035] like Figure 7As shown, this embodiment of the present application discloses an adjustable air volume distribution system. Its overall structure is identical to that of Example 1, differing only in the arrangement within the air distribution duct 30. Specifically, a middle interlayer lining cloth 37 is disposed along the length of the upper portion of the air distribution duct 30. This interlayer lining cloth 37 is shorter than the length of the air distribution duct 30, and its end adjacent to the transverse tube 21 is flush with the end of the air distribution duct 30. In this embodiment, this interlayer lining cloth 37 is 35 meters long, and its width is greater than the diameter of the air distribution duct 30. The two long sides of this interlayer lining cloth 37 are connected to the walls of the air distribution duct 30 on both sides. This interlayer lining cloth 37 is non-ventilated, thus dividing the air distribution duct 30 into an upper air chamber 31 and a lower air chamber 32, which are connected at the sealed end. Because the interlayer lining cloth 37 is shorter than the length of the air distribution duct 30, the upper and lower air chambers 31 and 32 are connected at the sealed end of the air distribution duct 30. A cavity switching lining cloth 2 38 is provided at the end of the air cavity near the transverse tube 21. The edges of the cavity switching lining cloth 2 38 are connected to the corresponding positions of the air distribution tube 30 and the middle interlayer lining cloth 37 via zippers. The cavity switching lining cloth 2 38 does not have ventilation. When the cavity switching lining cloth 2 38 is connected to the air distribution tube 30 and the middle interlayer lining cloth 37, the end of the lower air cavity 32 near the transverse tube 21 is blocked. During ventilation, fresh air from the outside can only enter from the upper air cavity 31, then flow along the upper air cavity 31 toward the sealed end of the air distribution tube 30. After reaching the sealed end, it flows into the lower air cavity 32, flows along the lower air cavity 32 toward the end near the transverse tube 21, and then flows into the livestock and poultry house from the air outlet 33.

[0036] During operation, in winter or cold areas, it is necessary to preheat the outside fresh air. The cavity switching lining cloth 2 38 is in a connected state, blocking the end of the lower air cavity 32 near the horizontal tube 21. The outside fresh air can only enter from the upper air cavity 31. Under the action of wind, the middle interlayer lining cloth 37 will sag to form an arc, forming the upper air cavity 31 with the upper half of the wall of the air distribution tube 30. Figure 8 As shown, the fresh air then flows along the upper air cavity 31 toward the sealed end of the air distribution duct 30, and exchanges heat with the environment in the livestock and poultry house during circulation. Since the length of the air distribution duct 30 is 36m and the length of the middle partition lining cloth 37 is 35m, the outside fresh air continuously exchanges heat with the environment in the livestock and poultry house during the 35m flow path, so that the temperature of the outside fresh air can be continuously increased to be close to the ambient temperature in the livestock and poultry house, and then flows into the livestock and poultry house from the air outlet 33 on the lower air cavity 32, avoiding cold stress on the livestock and poultry and ensuring a suitable environment for the growth of livestock and poultry.

[0037] In spring and autumn, as the outside temperature rises, the demand for fresh air in the livestock and poultry house gradually increases, and a large amount of fresh air needs to be introduced through the air distribution duct 30. At this time, the zipper between the cavity switching lining cloth 2 38 and the air distribution duct 30 and the middle partition lining cloth 37 can be unzipped, and the cavity switching lining cloth 2 38 can be taken out. In this way, the end of the lower air cavity 32 near the horizontal tube 21 is opened. When the air supply mechanism 10 supplies air, the middle partition lining cloth 37 will be blown up by the wind to form a semicircle with the opening downward and close to the upper half of the pipe wall of the air distribution duct 30, so that the upper air cavity 31 and the lower air cavity 32 are connected to form an approximately full circle, as shown in FIG. Figure 9 As shown, this is equivalent to the entire air distribution duct 30 directly taking in air and then discharging the air through the air outlet 33, which greatly increases the air intake volume.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An adjustable air volume distribution system, characterized by: The invention comprises an air supply mechanism (10) arranged outside a livestock and poultry house, wherein a main pipe (20) is arranged at an air outlet (33) of the air supply mechanism (10), the main pipe (20) extends into the livestock and poultry house and is connected to a transverse pipe (21) at the end thereof, and a plurality of air distribution pipes (30) are arranged on the transverse pipe (21) along the width direction of the livestock and poultry house, the length direction of the air distribution pipe (30) is consistent with the length direction of the livestock and poultry house, and the transverse pipe (21) and the air distribution pipe (30) are connected to each other. The pipes (30) are all arranged on the top of the livestock and poultry house. One end of the air distribution pipe (30) is connected to the tube cavity of the horizontal pipe (21), and the other end is sealed. The air distribution pipe (30) is divided into an upper air cavity (31) and a lower air cavity (32). The upper air cavity (31) and the lower air cavity (32) are connected at the end of the air distribution pipe (30) away from the horizontal pipe (21). An air outlet (33) is opened on the tube wall of the air distribution pipe (30) corresponding to the lower air cavity (32).

2. The adjustable air volume distribution system according to claim 1, characterized in that: A middle grid lining cloth (34) is provided in the middle of the tube cavity of the air distribution pipe (30) along its length direction. The length of the middle grid lining cloth (34) is less than the length of the air distribution pipe (30) and one end adjacent to the transverse pipe (21) is flush with the end of the air distribution pipe (30). The width of the middle grid lining cloth (34) is consistent with the diameter of the air distribution pipe (30) and the two long sides are connected to the tube walls on both sides of the air distribution pipe (30). A split lining cloth (35) is further provided on the upper side of the middle grid lining cloth (34). The length of the split lining cloth (35) is equal to the length of the middle grid lining cloth (34). The length of the split lining cloth (35) is consistent and the width is equal to the arc length of the upper semicircle of the air distribution pipe (30). The split lining cloth (35) divides the tube cavity of the air distribution pipe (30) into an upper air cavity (31) and a lower air cavity (32) connected at the sealed end. The lower air cavity (32) is provided with a semicircular cavity switching lining cloth (36) at the end adjacent to the horizontal pipe (21). The bottom end of the cavity switching lining cloth (36) is fixedly connected to the air distribution pipe (30), and the edges of the cavity switching lining cloth (36) are respectively connected to the corresponding positions of the air distribution pipe (30) and the split lining cloth (35) through zippers.

3. The adjustable air volume distribution system according to claim 1, characterized in that: An intermediate interlayer lining cloth (37) is provided on the upper part of the tube cavity of the air distribution pipe (30) along its length direction. The length of the intermediate interlayer lining cloth (37) is less than the length of the air distribution pipe (30) and one end adjacent to the transverse pipe (21) is flush with the end of the air distribution pipe (30). The two long sides of the intermediate interlayer lining cloth (37) are connected to the tube walls on both sides of the air distribution pipe (30) to divide the tube cavity of the air distribution pipe (30) into an upper air cavity (31) and a lower air cavity (32) connected at the sealed end. The width of the intermediate interlayer lining cloth (37) is greater than the diameter of the air distribution pipe (30). The end of the lower air cavity (32) adjacent to the transverse pipe (21) is provided with a cavity switching lining cloth 2 (38). The edges of the cavity switching lining cloth 2 (38) are respectively connected to the corresponding positions of the air distribution pipe (30) and the intermediate interlayer lining cloth (37) through a zipper.

4. The adjustable air volume distribution system according to any one of claims 1 to 3, characterized in that: The air outlets (33) are arranged in two rows along the length direction of the air distribution pipe (30), and the hole cores of the two rows of air outlets (33) are arranged at an angle to the horizontal plane.

5. The adjustable air volume air distribution system according to any one of claims 1 to 3, characterized in that: The air supply mechanism (10) comprises a housing (11), wherein a filter cotton layer (12), a high-efficiency filter (13), a wet curtain system (14) and an air supply fan (15) are sequentially arranged in the housing (11) from the air inlet side to the air outlet side.

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