CN219083353U - Flow equalizing air supply device for cylindrical wall-attached ventilation - Google Patents
Flow equalizing air supply device for cylindrical wall-attached ventilation Download PDFInfo
- Publication number
- CN219083353U CN219083353U CN202222776517.2U CN202222776517U CN219083353U CN 219083353 U CN219083353 U CN 219083353U CN 202222776517 U CN202222776517 U CN 202222776517U CN 219083353 U CN219083353 U CN 219083353U
- Authority
- CN
- China
- Prior art keywords
- shell
- plate
- air supply
- air
- supply device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Duct Arrangements (AREA)
Abstract
The utility model belongs to the technical field of heating ventilation and air conditioning, and relates to a flow equalizing air supply device for cylindrical wall-attached ventilation, which comprises a first shell, an upper layer pore plate, a second shell, a lower layer pore plate, a third shell and an air outlet plate, wherein the first shell, the upper layer pore plate, the second shell, the lower layer pore plate, the third shell and the air outlet plate are sequentially communicated from top to bottom and are formed by splicing two semicircular ring bodies; a guide plate is arranged at the joint of the two semicircular ring bodies of the first shell; an air inlet is formed in one side of each of the two semi-annular bodies of the first shell, and the guide plate is positioned at one side of the air inlet; a ventilation area is formed on the upper pore plate, and an eccentric distance exists between the ventilation area and the center of the cylindrical column body and is deviated to one side of the air inlet; a plurality of rows of air supply orifices are formed in the lower orifice plate; the air outlet plate is provided with an annular slit air port. The opening ratio of the near air supply outlet is ensured to be higher, the resistance loss is small, the downward flow is easier, the rear opening ratio is reduced, the resistance loss is increased, the speed reduction effect is achieved, the forward and backward downward flow speeds tend to be consistent, and the like equal pressure reduction uniform air outlet is realized.
Description
Technical Field
The utility model belongs to the technical field of heating ventilation and air conditioning, and particularly relates to a flow equalizing air supply device for cylinder wall-attached ventilation.
Background
The improvement of the energy efficiency of the building is an important measure for reducing the energy shortage and the environmental deterioration, and the reduction of the energy consumption generated by the resistance loss in the heating ventilation and air conditioning system is necessary, thereby having important significance for building energy conservation and sustainable development. The column wall adherence air supply depends on the coanda effect air supply air flow to flow downwards from the wall surface, the air supply air flow is supplied to the ground, and the air supply air flow spreads on the ground to form an air lake-shaped flow field. The ventilation mode is widely applied to high-large-space buildings with multiple bearing columns in rooms such as subway stations, shopping centers and exhibition centers.
In order to ensure uniform and stable air distribution, and to increase the energy utilization factor, it is desirable to effectively reduce the turbulence of the air flow while the air flow noise is within an acceptable range. The flow equalizing air supply device is widely applied to heating ventilation air conditioning systems, is often arranged between a main pipeline and an air outlet, reduces the speed of the air supply air flow in the device to be close to zero, and changes dynamic pressure into static pressure to the maximum extent so as to realize uniform air flow distribution.
The existing flow equalizing air supply device for column wall adherence air supply still has the defects of low air supply uniformity, high manufacturing cost, complicated installation and the like when the device works, so that the device is not suitable for the existing bearing column of a building and is difficult to popularize and apply.
Disclosure of Invention
The utility model aims to provide a flow equalizing air supply device for cylindrical wall-attached ventilation, which solves the problems of air supply uniformity, low manufacturing cost and complicated installation of the existing air supply device.
The utility model is realized by the following technical scheme:
a flow equalizing air supply device for cylindrical wall-attached ventilation comprises a first shell, an upper layer pore plate, a second shell, a lower layer pore plate, a third shell and an air outlet plate, which are sequentially communicated from top to bottom;
the first shell, the upper layer pore plate, the second shell, the lower layer pore plate, the third shell and the air outlet plate are formed by splicing two semicircular ring bodies, and the inner diameter is the same as the outer diameter of the cylindrical column body and is used for encircling and connecting the cylindrical column body;
the lower side surface of the first shell is open, and a guide plate is arranged at the joint of the two semicircular ring bodies of the first shell; an air inlet is formed in one side of each of the two semi-annular bodies of the first shell, and the guide plate is positioned at one side of the air inlet;
a ventilation area is formed on the upper pore plate, and an eccentric distance exists between the ventilation area and the center of the cylindrical column body and is deviated to one side of the air inlet;
a plurality of rows of air supply orifices are formed in the lower orifice plate;
the air outlet plate is provided with an annular slit air port.
Further, the upper orifice plate is an annular plate with the inner diameter of R, and a plurality of rows of air supply orifices are formed in a circular area with the radius of R' on the upper orifice plate to form a ventilation area;
the circle center O ' of the circle with the radius of R ' deviates from the circle center O of the annular plate by 0.25L, and R ' =R+0.5L; l is the difference between the inner diameter and the outer diameter of the annular plate.
Further, the included angle between two adjacent rows of air supply orifices is 2-5 degrees.
Further, the air inlet is connected with the main pipeline through a flange.
Further, the installation position of the upper layer pore plate is flush with the lower edge line of the air inlet.
Further, the deflector is a 1/4 arc section of a circle, and the height of the deflector is the same as that of the first shell.
Further, the air outlet plate is connected with the third shell through a fixing piece.
Further, a plurality of annular slit air openings are formed, and the annular slit air openings are arranged at equal intervals;
the inner diameter of the annular strip seam positioned at the innermost side is R 1 The outer diameter of the annular strip seam positioned at the outermost side is R 2 The width of the annular slit tuyere is R 2 -R 1 ；
R 2 And R is R 1 The following relationship is satisfied:
satisfy the following requirements
Further, the range of the width of the annular slit tuyere is 30-150 mm.
Further, the inner walls of the first shell, the second shell and the third shell are provided with silencing and heat-insulating cotton.
Compared with the prior art, the utility model has the following beneficial technical effects:
the utility model discloses a flow equalizing air supply device for cylindrical wall-attached ventilation, which can be used for cylindrical wall-attached air supply, on the basis of not changing the conventional size of the flow equalizing device, the air supply air flow enters a shell and flows behind the shell under the action of a guide plate and air supply momentum, so that the air supply speed at a position close to an air supply port is smaller. The utility model improves the uniform air outlet effect of the annular strip seam air outlet.
Further, in order to better realize the column wall adherence air supply effect, the inner diameter of the annular strip seam positioned at the innermost side is R 1 The outer diameter of the annular strip seam positioned at the outermost side is R 2 The width of the annular slit tuyere is R 2 -R 1 ；R 2 And R is R 1 The following relationship is satisfied: satisfy the following requirements
The air flow is influenced by the coanda effect, and the air flow clings to the wall surface of the column body and flows downwards, so that the air flow is more effectively sent into the working area.
Drawings
FIG. 1 is an isometric schematic of the structure of the present utility model;
FIG. 2 is an exploded view of the structure of the present utility model;
FIG. 3 is a schematic diagram of an upper orifice plate design;
FIG. 4 is a schematic view of the structure of the lower orifice plate;
FIG. 5 is a layout view of annular slit tuyeres on an air outlet plate;
FIG. 6 is a schematic view of the flow of indoor air streams using the present utility model;
FIG. 7 is a schematic diagram of site wind speed data.
Wherein, 1 is first casing, 2 is the air intake, 3 is the guide plate, 4 is upper orifice plate, 5 is lower orifice plate, 6 is annular strip seam wind gap, 7 is the air-out board, 8 is the second casing, 9 is the third casing.
Detailed Description
The objects, technical solutions and advantages of the present utility model will be more apparent from the following detailed description with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the utility model, i.e., the embodiments described are only some, but not all, of the embodiments of the utility model.
The components illustrated in the figures and described and shown in the embodiments of the utility model may be arranged and designed in a wide variety of different configurations, and thus the detailed description of the embodiments of the utility model provided in the figures below is not intended to limit the scope of the utility model as claimed, but is merely representative of selected ones of the embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model, based on the figures and embodiments of the present utility model.
It should be noted that: the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, element, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, element, method, article, or apparatus.
The features and properties of the present utility model are described in further detail below with reference to examples.
The bearing is carried out through the cylindrical structural design in the building, the spacing between adjacent columns is approximately the same, and no barrier is used for shielding. The cylindrical wall-attached ventilation mode air flow reaches the ground and is radially diffused along the 360-degree circumference. The column wall adherence ventilation is combined with the indoor structural column, so that the indoor upper space is saved, the device is arranged in the suspended ceiling, and the appearance is attractive. By adopting the utility model, the air supply uniformity in the current air supply mode can be effectively improved, and better flow field distribution is realized in the breathing zone of the personnel.
As shown in fig. 1-4, the flow equalizing air supply device for cylindrical wall-attached ventilation comprises a first shell 1, an upper layer pore plate 4, a second shell 8, a lower layer pore plate 5, a third shell 9 and an air outlet plate 7 which are sequentially communicated from top to bottom; the first shell 1, the upper layer pore plate 4, the second shell 8, the lower layer pore plate 5, the third shell 9 and the air outlet plate 7 are of a double semicircular ring structure formed by splicing two semicircular rings, and the inner diameter is the same as the outer diameter of the cylindrical column body and is used for encircling and connecting the cylindrical column body; the lower side surface of the first shell 1 is open, and a guide plate 3 is arranged at the joint of the two semicircular ring bodies of the first shell 1; an air inlet 2 is formed in one side of each of the two semicircular ring bodies of the first shell 1, and a guide plate 3 is positioned at one side of the air inlet 2; a ventilation area is formed on the upper pore plate 4, and an eccentric distance exists between the ventilation area and the center of the cylindrical column body and is deviated to one side of the air inlet 2; a plurality of rows of air supply orifices are formed in the lower orifice plate 5; the air outlet plate 7 is provided with an annular slit air port 6.
The air inlet 2 is a rectangular air inlet 2, is connected with the main air supply pipeline through a flange, ensures tightness by adopting sealant, and is used for installing components, wherein the distance between the air inlet 2 and the top of the first shell 1 is 50-150 mm.
The guide plate 3 is connected to the air inlet 2, the height of the guide plate 3 is the distance from the upper orifice plate 4 to the top of the first shell 1, and the firmness of the guide plate 3 is ensured by adopting modes such as welding. The guide plate 3 is in a 1/4 arc shape and is tangential to the inner wall surface of the first shell 1.
As shown in fig. 3, the upper orifice plate 4 is an annular plate with an inner diameter R, and a plurality of rows of air supply orifices are formed in the upper orifice plate 4 at equal angles along the circumferential direction in a circular area with a radius R', so as to form a ventilation area; the circle center O 'of the upper layer pore plate 4 deviates from the circle center O of the annular plate by 0.25L, and R' =R+0.5L; l is the difference between the inner diameter and the outer diameter of the annular plate.
The aperture ratio of the orifice plate refers to the ratio of the area of the orifice plate aperture to the area of the whole orifice plate mounting area. The resistance loss of the orifice plate is in an exponential relation with the aperture ratio, and the orifice plate with large aperture ratio has small resistance loss and large resistance loss. After the air flow enters the shell, the air flow flows behind the shell under the action of the guide plate 3 and the air flow momentum, so that the air flow speed at the position close to the air supply port is smaller, and therefore, the resistance is changed by adjusting the difference of the opening ratios at the front and rear positions, the opening ratio at the position close to the air supply port is ensured to be higher, the resistance loss is small and the downward flow is easier, the rear opening ratio is reduced, the resistance loss is increased, the effect of 'reducing' is achieved, and the front and rear downward flow speeds tend to be consistent. The upper layer pore plate 4 is flush with the lower edge line of the air inlet 2.
As shown in fig. 4, the aperture ratio of the lower layer orifice plate 5 should ensure 20% -40%, the punched holes are uniformly distributed, the intervals are equal, each row of holes are distributed along the circumferential direction of the annular first shell 1, the included angle is θ, and the recommended value of θ of two adjacent rows of air supply orifices is 2 ° to 5 °.
As shown in fig. 5, the annular slit air openings 6 are installed below the air supply device through fixing pieces, and as shown in fig. 5, a plurality of annular slit air openings 6 are formed and are arranged at equal intervals; the inner diameter of the annular strip seam positioned at the innermost side is R1, and the outer diameter of the annular strip seam positioned at the outermost side is R 2 The width of the annular slit tuyere 6 is R 2 -R 1 ；R 2 And R is R 1 The following relationship is satisfied:
R 2 -R 1 The range of the value of (C) is 30 mm-150 mm.
The silencing and heat-preserving cotton cloth is arranged inside the shell, and is made of materials with silencing functions, so that airflow noise is reduced, and the effects of heat insulation and heat preservation are achieved.
And when the air supply device is manufactured, the joints of all the components should be sealed with gaps, so that the air supply air flow is prevented from penetrating outwards from other parts except the annular strip gap air port 6.
The following examples are given in connection with the present utility model, and the present utility model is not limited to the following examples, but all equivalent changes or substitutions within the technical content of the present utility model fall within the scope of the present utility model.
Example 1
As shown in FIG. 6, a full-size experimental model of a flow equalizing air supply device for cylindrical wall-attached ventilation is established according to practical conditions, the outer diameter of the first shell 1 is 1050mm, the inner diameter R is 700mm, and R 1 750mm, R 2 The annular slit tuyere 6 is 780mm in width and 600mm in height, the air inlet 2 is 250mm in length and 200mm in width, the distance between two layers of pore plates is 186mm, the pore diameter of the lower layer of pore plates 5 is 15mm, and the aperture ratio is 30.83%.
The experiment is carried out under isothermal working condition, the centrifugal variable frequency fan is adopted to adjust the air quantity, and the air quantity is set to 2000m 3 And (h) uniformly arranging 24 measuring points at the annular slit tuyere 6 along the circumferential direction for wind speed measurement, wherein the included angle between each adjacent measuring point and the circle center is 15 degrees, and the wind supply device is symmetrically designed, so that the wind speeds of 12 measuring points on one side are tested, and the measurement result is shown in figure 7.
Testing the uniformity of the section speed of the air outlet by adopting the non-uniformity coefficient
And evaluating the air outlet uniformity of the flow equalization air supply device. Wherein K is u For the non-uniform velocity coefficient, n is the number of measuring points, u i For the speed of each measuring point, the speed is->
For each measurementPoint velocity average.
The flow equalization device is made of galvanized steel plates, and silencing materials are tightly attached to the inner side wall of the first shell 1 of the flow equalization device.
In order to compare with the uniformity of the air outlet of the traditional single-layer orifice plate flow straightener, the speed distribution of the single-layer orifice plate flow straightener is further tested under the same parameter setting conditions, the same air outlet boundary conditions and the same experimental test method.
As shown in FIG. 7, the air supply volume is 2000m 3 And (3) during/h, summarizing data obtained by 12 measuring points by using a non-uniformity coefficient calculation formula, wherein when the current-sharing air supply device is adopted, the average air outlet speed is 3.5m/s, the non-uniformity is 9.2%, the non-uniformity of the air outlet of the current-sharing air supply device designed by the traditional single-layer pore plate is 11.7%, and the air outlet uniformity is improved by 21.37% compared with the air outlet uniformity of the current-sharing air supply device.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the utility model without departing from the spirit and scope of the utility model, which is intended to be covered by the claims.
Claims (10)
1. The flow equalizing air supply device for cylindrical wall-attached ventilation is characterized by comprising a first shell (1), an upper layer pore plate (4), a second shell (8), a lower layer pore plate (5), a third shell (9) and an air outlet plate (7) which are sequentially communicated from top to bottom;
the first shell (1), the upper layer pore plate (4), the second shell (8), the lower layer pore plate (5), the third shell (9) and the air outlet plate (7) are formed by splicing two semicircular ring bodies, and the inner diameter is the same as the outer diameter of the cylindrical column body and is used for encircling and connecting the cylindrical column body;
the lower side surface of the first shell (1) is open, and a guide plate (3) is arranged at the joint of the two semicircular ring bodies of the first shell (1); an air inlet (2) is formed in one side of each of the two semicircular ring bodies of the first shell (1), and the guide plate (3) is positioned at one side of the air inlet (2);
a ventilation area is arranged on the upper layer pore plate (4), and an eccentric distance exists between the ventilation area and the center of the cylindrical column body and is deviated to one side of the air inlet (2);
a plurality of rows of air supply orifices are arranged on the lower orifice plate (5);
an annular slit air port (6) is arranged on the air outlet plate (7).
2. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein the upper layer orifice plate (4) is an annular plate with an inner diameter of R, and a plurality of rows of air supply orifices are formed in the upper layer orifice plate (4) in a circular area with a radius of R' at equal angles along the circumferential direction to form a ventilation area;
the circle center O ' of the circle with the radius of R ' deviates from the circle center O of the annular plate by 0.25L, and R ' =R+0.5L; l is the difference between the inner diameter and the outer diameter of the annular plate.
3. A flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 2, wherein the angle between two adjacent rows of air supply openings is 2-5 °.
4. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein the air inlet (2) is connected with the main pipeline through a flange.
5. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein the installation position of the upper orifice plate (4) is flush with the lower edge line of the air inlet (2).
6. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein the flow guide plate (3) is a 1/4 arc section of a circle, and the height of the flow guide plate is the same as that of the first shell (1).
7. A flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, characterized in that the air outlet plate (7) and the third housing (9) are connected by means of a fixing element.
8. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein a plurality of annular slit air openings (6) are formed and are arranged at equal intervals;
the inner diameter of the annular strip seam positioned at the innermost side is R1, the outer diameter of the annular strip seam positioned at the outermost side is R2, and the width of the annular strip seam air port (6) is R 2 -R 1 ；
R 2 And R is R 1 The following relationship is satisfied:
satisfy the following requirements
9. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein the width of the annular slit tuyere (6) ranges from 30mm to 150mm.
10. The flow equalizing air supply device for cylindrical wall-attached ventilation according to claim 1, wherein the inner walls of the first shell (1), the second shell (8) and the third shell (9) are provided with silencing and heat-insulating cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222776517.2U CN219083353U (en) | 2022-10-19 | 2022-10-19 | Flow equalizing air supply device for cylindrical wall-attached ventilation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222776517.2U CN219083353U (en) | 2022-10-19 | 2022-10-19 | Flow equalizing air supply device for cylindrical wall-attached ventilation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219083353U true CN219083353U (en) | 2023-05-26 |
Family
ID=86422430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222776517.2U Active CN219083353U (en) | 2022-10-19 | 2022-10-19 | Flow equalizing air supply device for cylindrical wall-attached ventilation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219083353U (en) |
-
2022
- 2022-10-19 CN CN202222776517.2U patent/CN219083353U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107966254A (en) | Air-tightness detection method in a kind of residential housing room | |
| CN204757260U (en) | Air supply system and phytotron | |
| CN105067220B (en) | A kind of mine ventilation network system experimental device and method | |
| CN104990239A (en) | Annular uniform cross-section flow equalizing apparatus for cylinder wall-attached air supply | |
| CN219083353U (en) | Flow equalizing air supply device for cylindrical wall-attached ventilation | |
| CN102937350B (en) | Low wind resistance type thin evaporator and indoor unit of air conditioner | |
| JPH11223378A (en) | Air-outlet for air-conditioning equipment | |
| CN209910126U (en) | Ventilating duct | |
| CN110887206A (en) | Air duct of air conditioner with lower air supply | |
| CN207089622U (en) | Variable air volume end device and air conditioning system | |
| CN211233299U (en) | Air duct of air conditioner with lower air supply | |
| CN212362206U (en) | Embedded air conditioner and building provided with same | |
| CN113790867B (en) | Method for detecting flow field characteristics in cut stem sorting channel | |
| CN110723997B (en) | Composting reactor uniform ventilation system | |
| JPH01142354A (en) | Ceiling blow-off structure for air-conditioning room | |
| CN111537179B (en) | Small-size wind tunnel-based screen window small micro-pressure drop testing device | |
| CN108716732A (en) | New wind turbine | |
| CN105135585B (en) | A kind of bilateral ventilation device and its control method for forming air pond air current composition | |
| CN201653683U (en) | Suddenly expanding pipe system with circulatory particles | |
| CN113446691A (en) | Wall-attached air supply device with double flow guide plates and air supply method thereof | |
| CN217952626U (en) | Flow equalizing fan and diffusion type flow equalizer used by same | |
| CN207527717U (en) | Ducting system, air conditioner indoor unit and air conditioner | |
| CN111561736B (en) | Embedded air conditioner and building provided with same | |
| CN221789970U (en) | Drying device is used in processing of special fluorine dragon sticky tape | |
| CN217464651U (en) | Indoor side structure of window type air conditioner and window type air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |