Airflow coupling and blowing device based on near-far end cooperative control

Abstract

The utility model discloses a kind of airflow coupling air supply devices based on near-end collaborative control, including annular static pressure tank, cylinder, the annular static pressure tank has the pipe body being penetrated with upper end and lower end, pipe body upper end is equipped with air inlet, pipe body lower end is connected annular skirt, pipe body side surface is equipped with spout, the upper portion of cylinder is embedded in the annular skirt of annular static pressure tank, the surface edge of cylinder upper end or the surface of pipe body lower end is equipped with protruding part being spaced apart along circumference, so that annular strip gap air port is formed between the inner periphery of annular skirt and the outer periphery of cylinder, and air supply airflow is formed along the column surface Attachment jet flow.The utility model strengthens air delivery capacity by spout far-end air supply, and air flow is guided along wall surface by using column surface attachment jet flow, optimizes air flow, improves ventilation efficiency, while effectively absorbing and excluding wall surface moisture, improve space environmental quality.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation and air conditioning technology, specifically to an airflow coupling air supply device based on near-far end coordinated control. Background Technology

[0002] With the increasing use of underground spaces, moisture control and airflow within these spaces have become pressing technical challenges. Traditional underground ventilation systems mostly rely on natural or mechanical ventilation, but both methods have significant limitations. Natural ventilation is less effective in enclosed or large spaces, failing to achieve uniform airflow and effectively control moisture. While mechanical ventilation systems can provide strong airflow, their single air delivery method results in uneven air distribution, causing moisture to accumulate in low-lying areas near walls, making effective removal difficult.

[0003] Existing ventilation systems commonly use conventional direct-flow air vents or simple nozzle air supply devices. While this method can improve ventilation to some extent, its relatively simple airflow pattern makes it difficult to effectively remove moisture, especially in areas near walls and corners, resulting in excessive humidity. This further affects the comfort of people in the space and the safety of equipment.

[0004] Furthermore, some existing patents (such as CN101988731A) propose column-mounted ventilation technology, but this technology is usually limited to localized ventilation and fails to fully integrate with nozzle air delivery technology for long-distance air treatment in large spaces, and it also fails to solve the problem of moisture generation on walls. The high efficiency of column-mounted ventilation has not been effectively combined with the long-distance delivery characteristics of nozzle air delivery, resulting in the inability of existing technologies to achieve the dual goals of uniform airflow and efficient moisture removal in large spaces. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an airflow coupling ventilation device based on near-far end coordinated control. It enhances air delivery capacity by delivering air from the far end of the nozzle and guides the airflow along the wall surface using a column-mounted jet to optimize airflow, improve ventilation efficiency, and effectively absorb and remove moisture from the wall surface, thereby improving the quality of the spatial environment.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: an airflow coupling air supply device based on near-far end coordinated control, including an annular static pressure box and a column. The annular static pressure box has a pipe that is penetrated at the upper and lower ends. An air inlet is provided at the upper end of the pipe, and an annular skirt is connected to the lower end of the pipe. A nozzle is provided on the side of the pipe. The upper part of the column is embedded in the annular skirt of the annular static pressure box. The edge of the upper surface of the column or the lower surface of the pipe is provided with spaced protrusions along the circumference, so that an annular slot air outlet is formed between the inner circumference of the annular skirt and the outer circumference of the column.

[0007] A protective filter screen is installed below the air inlet inside the pipe.

[0008] The diameter of the column is larger than the diameter of the inner circumference of the tube, but smaller than the diameter of the inner circumference of the annular skirt.

[0009] The circumferential surface of the column is free of obstructions.

[0010] The beneficial effects of this invention are as follows: The attached jet and distal nozzle of this invention ensure uniform airflow distribution, reduce air stagnation, and improve air delivery coverage and efficiency. This device actively absorbs and removes moisture from the wall surface through the attached jet, preventing moisture accumulation. It is particularly suitable for high-humidity environments, effectively improving air quality and significantly reducing condensation and mold growth. Simultaneously, it optimizes airflow organization, avoids short-circuiting, improves air delivery efficiency, reduces air conditioning load, and achieves energy-saving effects. Attached Figure Description

[0011] Figure 1 This is a schematic diagram and a partial enlarged detail view of the air supply device of this utility model;

[0012] Figure 2 A schematic diagram of the jet flow from a single air supply device within a built environment;

[0013] Figure 3 A schematic diagram of the jet flow from multiple air supply devices within the building environment and different zones;

[0014] Figure 4 This is a contour map showing the velocity magnitude distribution in the vertical plane direction under Example 3.

[0015] Figure 5 This is a contour map showing the velocity distribution on a horizontal plane at a height of 1700mm in Example 4. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] like Figure 1-2As shown, an airflow coupling air supply device based on near-far end coordinated control is provided. An annular static pressure box with an air inlet 1, a nozzle 2 and an annular skirt 3 is installed on the upper end of a column 5 in a space. The annular static pressure box has a pipe 4 that is penetrated at the upper and lower ends. The upper end of the pipe 4 is provided with an air inlet 1, which is connected to a ventilation pipe or a wind pump. The lower end of the pipe body 4 is connected to the annular skirt 3, and the side of the pipe body 4 is provided with a nozzle 2. The upper part of the column body 5 is embedded in the annular skirt 3 of the annular static pressure box. The upper surface edge of the column body 5 or the lower surface of the pipe body 4 is provided with spaced protrusions 7 along the circumference, so that the inner circumference of the annular skirt 3 and the outer circumference of the column body 5 form an annular slot air outlet. A protective filter screen 6 is provided below the air inlet 1 inside the pipe body 4. The air supply airflow is discharged through the nozzle 2 and the annular slot air outlet of the pipe body 4. The air discharged from the annular slot air outlet forms an adhering jet along the cylindrical surface of the column body 4, while the nozzle provides long-range air supply capability, realizing a high-efficiency air supply method that combines long and short distances.

[0018] The circumferential surface of column 5 is unobstructed, and the annular static pressure box delivers air outward through annular slotted vents. Utilizing the Coanda Effect, the airflow adheres to the surface of column 5, allowing air to diffuse along the wall, avoiding localized airflow stagnation or short-circuiting, optimizing airflow organization, and thus significantly improving the uniformity of airflow. The jet range is extended, and mixing with indoor air is reduced, thereby optimizing the air delivery path. The adhering flow formed by nozzle 2 at the wall actively absorbs and removes moisture from the wall surface during its flow, effectively suppressing moisture accumulation on walls and in corners. Furthermore, nozzle 2 provides far-end air delivery, making the airflow throughout the space more uniform and improving ventilation efficiency.

[0019] The annular slotted air vent delivers air along the surface of column 5 from top to bottom to the bottom of the room, allowing the supplied air to settle and diffuse, forming a stable airflow area and optimizing indoor airflow organization. This method improves air quality in areas where people are active, while reducing unnecessary energy consumption, improving system operating efficiency, and ultimately achieving the goals of efficient ventilation, humidity control, and energy saving.

[0020] Example 2

[0021] like Figure 3 As shown, when this utility model device is applied to a large space, the device is symmetrically installed at corner A of the wall. The main nozzles spray airflow towards both walls, causing it to contact the walls and generate a downward airflow, thus forming a bidirectional adhering flow along both walls. At point B in the middle of the wall, there is a single nozzle whose airflow extends towards one side of the wall, causing it to contact the wall and generate a downward airflow, thus forming a unidirectional adhering flow along both walls. At point C in the middle of the space, four independent jets of air are horizontally radially distributed without adhering to any column, delivering air to the area far from the column.

[0022] During operation, the main nozzle delivers airflow at a speed of 6-12 m / s to cover the distant area, while the column-mounted delivery port delivers airflow near the wall at a speed of 1-5 m / s. Through the Coanda effect, the airflow near the wall adheres to the wall surface, forming a negative pressure zone that actively adsorbs moisture from the wall surface, working together with the main airflow to carry the moisture away from the wall surface.

[0023] Example 3

[0024] Based on the actual situation, a numerical calculation model for the device's air supply mode is established: nozzle diameter 60mm, air supply velocity 8m / s, ground height 5500mm, column radius 500mm; slotted air supply outlet width 87mm, air supply velocity 4m / s, ground height 5000mm, column center point 5000mm from wall, and column spacing 1000mm.

[0025] To verify the air supply effect and indoor airflow of the device in this embodiment, a Realizable k-ε turbulence model was used, and the governing equations were established as follows:

[0026]

[0027] The meanings and units of each physical term in the formula are listed in Table 1.

[0028] Table 1

[0029]

[0030] The SIMPLEC algorithm was selected, with the pressure discretization scheme set to Standard. All other parameters were discretized using second-order upwind schemes. The convergence criterion was set to a residual value for the turbulent term of less than 10. -3 The residual value of the energy term is less than 10. -6 .

[0031] Figure 4 The diagram shows the velocity distribution along the vertical plane in Example 3, illustrating the air delivery of the device. In the diagram, the nozzle area at the top of the column ejects air at high speed towards the left wall, where the airflow descends along the wall, providing relatively uniform coverage of the vertical area from 0 to 5000 mm. The nozzle on the right side similarly ejects air to cover the area further from the column end. The column's slotted air vents blow air vertically downwards along the wall, with an adhesion length of 4500 mm. Upon reaching the ground, air undergoes secondary adhesion, resulting in relatively effective airflow control near the column end. In the air delivery mode with coordinated control of both inlet and outlet airflow, the airflow can effectively cover the working area at a low velocity, improving both air delivery efficiency and comfort.

[0032] Example 4

[0033] A numerical calculation model for the air supply mode is established using multiple devices in multiple groups, with parameters the same as in Example 2. Figure 5 The distribution of air velocity contours of the device at a horizontal plane 1700mm high is shown; the air velocity gradient in the working area is small and uniformly distributed; the air velocity gradient at the wall is large and closely adheres to the wall; indicating that the device can effectively control the overall airflow in the indoor working area and form an adhering jet to the wall to absorb heat and moisture.

[0034] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An airflow coupling ventilation device based on near-far end coordinated control, characterized in that, The system includes an annular static pressure box and a column (5). The annular static pressure box has a tube (4) that is penetrated at the upper and lower ends. The upper end of the tube (4) is provided with an air inlet (1). The lower end of the tube (4) is connected to an annular skirt (3). The side of the tube (4) is provided with a nozzle (2). The upper part of the column (5) is embedded in the annular skirt (3) of the annular static pressure box. The upper surface edge of the column (5) or the lower surface of the tube (4) is provided with spaced protrusions (7) along the circumference, so that an annular strip air outlet is formed between the inner circumference of the annular skirt (3) and the outer circumference of the column (5).

2. The airflow coupling ventilation device based on near-far end coordinated control according to claim 1, characterized in that, A protective filter (6) is installed below the air inlet (1) inside the pipe body (4).

3. The airflow coupling ventilation device based on near-far end coordinated control according to claim 1, characterized in that, The diameter of the column (5) is greater than the diameter of the inner circumference of the tube (4) and smaller than the diameter of the inner circumference of the annular skirt (3).

4. The airflow coupling ventilation device based on near-far end coordinated control according to claim 1, characterized in that, The circumferential surface of the column (5) is free of obstructions.

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