Laminar flow tuyere

Abstract

The utility model discloses a laminar flow tuyere which comprises a plenum chamber, an air inlet and an air outlet are formed in the top face and the bottom face of the plenum chamber respectively, a laminar flow outlet pore plate is arranged at the air outlet, and an adjustable flow equalizing pore plate, a fixed flow equalizing pore plate and a porous medium flow equalizing layer are sequentially arranged between the air inlet and the air outlet in an inner cavity of the plenum chamber. And the adjustable flow equalizing pore plate can be movably adjusted up and down relative to the air outlet. The adjustable flow equalizing pore plate, the fixed flow equalizing pore plate and the porous medium flow equalizing layer in the static pressure box of the laminar flow tuyere are used for diffusing air at the air inlet respectively, so that the pressure of the air is reduced step by step, finally, stable airflow is formed and is uniformly blown out from the bottom of the laminar flow air outlet pore plate at a low speed, and polluted air outside an area is prevented from being entrained.

Description

Technical Field

[0001] The utility model relates to an air outlet, in particular to a laminar flow air outlet. Background Art

[0002] The principle of the laminar flow air outlet is to divide the outgoing air flow into multiple uniform and stable air flows and send them into the room. It is mainly used in hospital operating rooms, laboratories, pharmacies, pharmaceutical factories, clean rooms and other key environmental spaces. Fresh air after high-efficiency filtration, disinfection and sterilization, and heat and humidity treatment is sent into the air inlet of the laminar flow air outlet through an air duct, and then the air flow is divided into multiple air flows through the diffusion and equalization of the laminar flow air outlet and sent into the required area of the room evenly and stably. For example, in a hospital operating room, it is usually installed in the top area of the operating table to avoid air in this area carrying pollutants. Content of the Utility Model

[0003] The purpose of the utility model is to provide a laminar flow air outlet with reasonable structure, remarkable laminar flow effect of the outgoing air, and applicable to a variety of inlet air pressure ranges.

[0004] The purpose of the utility model is achieved as follows:

[0005] A laminar flow air outlet includes a static pressure box. An air inlet and an air outlet are respectively arranged on the top surface or side surface and the bottom surface of the static pressure box. A laminar flow air outlet hole plate is arranged at the air outlet. An adjustable equalizing hole plate, a fixed V-shaped equalizing hole plate and a porous medium equalizing layer are sequentially arranged in the inner cavity of the static pressure box corresponding to between the air inlet and the air outlet. The adjustable equalizing hole plate can be adjusted up and down according to the air volume requirement.

[0006] The purpose of the utility model can also be solved by adopting the following technical measures:

[0007] As a more specific scheme, the adjustable equalizing hole plate is in the shape of a frustum or a cone with a narrower upper part and a wider lower part. It includes a top hole plate and a side hole plate. The top hole plate forms the top surface of the frustum or cone, and the side hole plate forms the side surface of the frustum or cone. The bottom of the frustum or cone is open.

[0008] As a further scheme, a screw rod is arranged on the top surface of the adjustable equalizing hole plate. An adjusting screw and a locking screw are externally screwed on the screw rod. A bracket is arranged at the air inlet. A connection hole corresponding to the center of the air inlet is arranged on the bracket. The screw rod passes through the connection hole. The adjusting screw and the locking screw are respectively arranged on the lower side and the upper side of the connection hole. When the air pressure entering the static pressure box is high, the adjustable equalizing hole plate is adjusted upward to reduce the air volume and the pressure in the static pressure box. When the air volume entering the static pressure box is too low, the adjustable equalizing hole plate is adjusted downward to increase the pressure in the static pressure box.

[0009] As a further solution, the fixed flow equalizing orifice plate is V-shaped, and its edge is close to the inner wall of the inner cavity of the static pressure box to divide the inner cavity into an upper cavity and a lower cavity. The V-shaped fixed flow equalizing orifice plate divides the static pressure box into two chambers. The V-shaped flow equalizing orifice plate is distributed along the length direction of the static pressure box to ensure that the high-speed air flow entering the static pressure box from the air inlet can fully diffuse and quickly become uniform along the length direction of the static pressure box.

[0010] As a further solution, the volume of the upper cavity is larger than that of the lower cavity. The air flow entering from the air inlet is first diffused by the adjustable flow equalizing orifice plate, so that the air flow diffuses in the upper cavity, and further diffuses evenly to the lower cavity through the fixed flow equalizing orifice plate; the volume of the lower cavity is smaller than that of the upper cavity, so that the air inside is more concentrated and passes through the porous medium flow equalizing layer, and is further diffused. After the pressure is further reduced, finally, the air is vertically discharged through the laminar flow outlet orifice plate at a constant low flow rate.

[0011] As a further solution, the static pressure box is in a cuboid shape, the adjustable flow equalizing orifice plate is in a frustum of a pyramid shape, the air inlet is located at the center of the top surface of the static pressure box, and the inclined plane forming the V shape of the fixed flow equalizing orifice plate extends along the long side direction of the static pressure box.

[0012] As a further solution, the porous medium flow equalizing layer is a high-density porous fireproof material, preferably flame-retardant cotton. The air can fully diffuse and reduce pressure in the flame-retardant cotton and is finally evenly discharged from the flame-retardant cotton.

[0013] As a further solution, a frame body is sleeved on the edge of the air outlet, a sunken platform is arranged on the inner side of the bottom surface of the frame body, and the laminar flow outlet orifice plate is embedded in the sunken platform.

[0014] As a further solution, the vertical projection area of the adjustable flow equalizing orifice plate is smaller than the vertical projection area of the air inlet. The air flow entering from the air inlet will not be completely blocked by the adjustable flow equalizing orifice plate, avoiding excessive pressure drop.

[0015] The beneficial effects of the present utility model are as follows:

[0016] (1) In the static pressure box of this laminar flow air outlet, the adjustable flow equalizing orifice plate, the fixed flow equalizing orifice plate and the porous medium flow equalizing layer respectively diffuse the air at the air inlet, so that the dynamic pressure of the air gradually decreases, and finally a stable pressure is formed and blown out evenly at a low speed from the bottom of the laminar flow outlet orifice plate, preventing the room air from being entrained by the clean filtered supply air.

[0017] (2) This laminar flow air outlet is suitable for applications where it is not desired or safe to inhale or mix indoor air, including operating rooms, laboratories, pharmacies, pharmaceutical factories, clean rooms and other critical environmental spaces.

[0018] (3) This laminar flow air outlet is provided with a porous medium flow equalizing layer, which on the one hand increases the uniformity of the air flow; on the other hand, it reduces the air outlet noise of the air outlet.

[0019] (4) A porous medium flow equalizing layer is arranged inside this laminar flow air outlet, which can better disperse the air dynamic pressure after secondary flow equalization more thoroughly and finally blow it out from the laminar flow air outlet plate in a low-speed and uniform form, so that the air in the area below it is pushed outwards; taking the installation and use above the operating table area as an example, through the uniform air outlet of the laminar flow air outlet, the polluted air in the operating table area is continuously pushed outwards to ensure the requirements such as the air cleanliness of the operating table area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the disassembled structure of an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the assembled structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the sectional structure of the present invention at one angle.

[0023] Figure 4 It is a schematic diagram of the sectional structure of the present invention at another angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described below in conjunction with the drawings and embodiments:

[0025] See Figures 1 to 4 As shown, a laminar flow air outlet includes a static pressure box 1. An air inlet 11 and an air outlet 13 are respectively provided on the top surface and the bottom surface of the static pressure box 1. A laminar flow air outlet plate 6 is provided at the air outlet 13. A variable flow equalizing orifice plate 2, a fixed flow equalizing orifice plate 3 and a porous medium flow equalizing layer 4 are sequentially arranged in the inner cavity of the static pressure box 1 corresponding to the air inlet 11 and the air outlet 13. The variable flow equalizing orifice plate 2 can move up and down relative to the air outlet 13 for adjustment.

[0026] The variable flow equalizing orifice plate 2 is in the shape of a frustum with a narrower top and a wider bottom. It includes a top orifice plate and a side orifice plate. The top orifice plate forms the top surface of the frustum, and the side orifice plate forms the side surface of the frustum. The bottom of the frustum is open.

[0027] A screw rod 21 is provided on the top surface of the variable flow equalizing orifice plate 2. An adjusting screw 23 and a locking screw 22 are externally screwed on the screw rod 21. A bracket 14 is provided at the air inlet 11. A connecting hole is provided at the center of the bracket 14 corresponding to the air inlet 11. The screw rod 21 passes through the connecting hole, and the adjusting screw 23 and the locking screw 22 are respectively arranged on the lower side and the upper side of the connecting hole.

[0028] The fixed flow equalizing orifice plate 3 is V-shaped, and its edge is close to the inner wall of the inner cavity of the static pressure box 1, so as to divide the inner cavity 12 into an upper cavity 121 and a lower cavity 122.

[0029] The volume of the upper cavity 121 is larger than the volume of the lower cavity 122.

[0030] The static pressure box 1 is rectangular parallelepiped-shaped, the adjustable flow equalizing orifice plate 2 is frustum-shaped, the air inlet 11 is located at the center of the top surface of the static pressure box 1, and the inclined plane forming the V shape of the fixed flow equalizing orifice plate 3 extends along the long side direction of the static pressure box 1.

[0031] The porous medium flow equalizing layer 4 is a high-density porous fireproof material, preferably high-quality flame-retardant cotton.

[0032] A frame body 5 is sleeved on the edge of the air outlet 13, a sunken platform 51 is arranged on the inner side of the bottom surface of the frame body 5, and the laminar flow air outlet orifice plate 6 is embedded in the sunken platform 51.

[0033] Its working principle is: Clean air enters the static pressure box 1 through the air inlet 11. Under the action of the adjustable flow equalizing orifice plate 2, the air diffuses in all directions of the upper cavity 121 along the A arrow. The air after the first diffusion then diffuses downward into the lower cavity 122 through the fixed flow equalizing orifice plate 3 along the B arrow for the second diffusion; after the second diffusion, the air enters the porous medium flow equalizing layer 4 for the third diffusion, and then is evenly blown out at a low speed from the bottom of the laminar flow air outlet orifice plate 6 along the C arrow direction.

[0034] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A laminar air outlet, comprising a static pressure box (1), wherein the top surface and the bottom surface of the static pressure box (1) are respectively provided with an air inlet (11) and an air outlet (13), and the air outlet (13) is provided with a laminar air outlet plate (6), characterized in that: An adjustable flow balancing orifice plate (2), a fixed flow balancing orifice plate (3) and a porous medium flow balancing layer (4) are sequentially arranged between the inner cavity (12) corresponding to the air inlet (11) and the air outlet (13) of the static pressure box (1); the adjustable flow balancing orifice plate (2) can be adjusted up and down relative to the air outlet (13).

2. The laminar air outlet according to claim 1, characterized in that: The adjustable flow-averaging orifice plate (2) is in the shape of a prism or a frustum that is narrow at the top and wide at the bottom, and comprises a top orifice plate and a side orifice plate, wherein the top orifice plate forms the top surface of the prism or frustum, the side orifice plates form the side surfaces of the prism or frustum, and the bottom of the prism or frustum is open.

3. The laminar air outlet according to claim 2, characterized in that: A screw rod (21) is provided on the top surface of the adjustable flow balancing orifice plate (2), and an adjusting screw (23) and a locking screw (22) are screwed onto the outside of the screw rod (21); a bracket (14) is provided at the air inlet (11), and a connecting hole is provided on the bracket (14) at the center of the air inlet (11), the screw rod (21) passes through the connecting hole, and the adjusting screw (23) and the locking screw (22) are respectively arranged at the lower side and the upper side of the connecting hole.

4. The laminar air outlet according to claim 2, characterized in that: The fixed flow balancing orifice plate (3) is V-shaped, and its edge is close to the inner wall of the inner cavity (12) of the static pressure box (1) to separate the inner cavity (12) into an upper cavity (121) and a lower cavity (122).

5. The laminar air outlet according to claim 4, characterized in that: The volume of the upper cavity (121) is greater than the volume of the lower cavity (122).

6. The laminar air outlet according to claim 4, characterized in that: The static pressure box (1) is in the shape of a rectangular parallelepiped, the adjustable flow balancing orifice plate (2) is in the shape of a quadrangular pyramid, the air inlet (11) is located at the center of the top surface of the static pressure box (1), and the fixed flow balancing orifice plate (3) forms a V-shaped inclined surface extending along the long side direction of the static pressure box (1).

7. The laminar flow vent according to claim 1, characterized in that: The porous medium flow-distributing layer (4) is a high-density porous fireproof material.

8. The laminar air outlet according to claim 7, characterized in that: The high-density porous fireproof material is flame-retardant cotton.

9. The laminar air outlet according to claim 1, characterized in that: A frame (5) is sleeved on the edge of the air outlet (13), a sink (51) is provided on the inner side of the bottom surface of the frame (5), and the laminar air outlet plate (6) is embedded in the sink (51).

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