Directional air diffuser for laboratory

Abstract

The directional air diffuser for the laboratory comprises an air inlet pipe, a rectangular frame and a plurality of guide blades, an inlet of the air inlet pipe is connected with an air outlet pipe of a ventilation system, and the rectangular frame is connected with an outlet of the air inlet pipe; four edges of the rectangular frame are respectively a first close inner side edge, a second close inner side edge, a first close outer side edge and a second close outer side edge, an inward included angle is formed between the first close inner side edge and the second close inner side edge, and an outward included angle is formed between the first close outer side edge and the second close outer side edge; the two ends of the guide blade are connected to the first inner side edge and the second inner side edge respectively. The guide blade is bent in an L shape and comprises a vertical section and an inclined section in the width direction, and the inclined section inclines from the lower edge of the vertical section to the first outer side edge and the second outer side edge; the multiple guide blades are arranged in parallel, the lengths of the guide blades are sequentially increased from the inner included angle to the outer included angle, and a flow dispersion channel is formed between every two adjacent guide blades, so that air circulation in a laboratory can be promoted, and experiments are not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of laboratory facilities, and specifically relates to a directional diffuser for laboratories. Background Art

[0002] Diffusers are usually installed at the air supply outlets of air conditioning / ventilation systems to disperse the air flow at the outlets, making it more evenly distributed indoors. The common diffuser structures are square and circular. The main body is composed of multiple square or circular air guiding vanes nested layer by layer from the inside to the outside. The air guiding vanes are regularly arranged at equal intervals and inclined towards the surroundings, presenting a completely symmetrical shape. The air diffuses outwards from the outlet of the air supply duct through the gaps between the air guiding vanes, enabling fresh air or cold / hot gases to flow to various positions in the room faster, so as to improve the comfort of the indoor environment.

[0003] However, traditional diffusers are mainly applicable to ordinary scenarios such as homes and offices, and cannot meet the usage requirements for relatively more special and complex laboratory environments. During chemical experiments, various harmful gases, odors, moisture, as well as flammable, explosive, and corrosive substances may be generated, and higher requirements are placed on the air circulation in the laboratory. Traditional diffusers are usually installed in the middle of the ceiling for overall ventilation of the indoor environment. The gas flows evenly and diffusely around through the air guiding vanes, resulting in a problem of very little wind and poor air circulation at the corner positions. This not only affects the comfort of the indoor environment, but also when toxic and harmful gases enter the triangular area formed by the ceiling and two walls, they cannot be discharged in time, posing a safety hazard. If the existing diffuser with air outlet around is directly installed at a position close to the ceiling corner, part of the outflowing gas is blocked by the wall, resulting in low ventilation efficiency; the air flow rebounds after hitting the laboratory wall at a short distance, causing noise problems and affecting the normal work of experimental personnel.

[0004] In addition, in order to protect the safety of indoor personnel, ventilation cabinets are usually used for local exhaust near pollution sources in modern laboratories to prevent pollutants from spreading widely in the laboratory. If a traditional diffuser with air outlet around is used for overall ventilation of the indoor environment at the same time, it is easy to interfere with the air flow of the ventilation cabinet, resulting in the leakage of toxic and harmful gases in the ventilation cabinet from the cabinet opening to the entire laboratory interior, posing a great safety hazard. Summary of the Utility Model

[0005] The present utility model is made to solve the above problems, and aims to provide a directional diffuser for laboratories.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] A directional diffuser for laboratories, comprising an air inlet pipe, a rectangular frame, and a plurality of guiding vanes, wherein:

[0008] The inlet of the air inlet pipe is connected to the outlet pipe of the ventilation system, and the rectangular frame is horizontally installed on the indoor ceiling and connected to the outlet of the air inlet pipe.

[0009] The four sides of the rectangular frame are respectively the first inner side, the second inner side, the first outer side and the second outer side. There is an inner included angle between the first inner side and the second inner side, and an outer included angle between the first outer side and the second outer side.

[0010] The guiding vanes are located inside the rectangular frame, and the two ends are respectively connected to the first inner side and the second inner side of the rectangular frame.

[0011] The guiding vanes are bent in an L shape in the length direction and include a vertical section and an inclined section that are vertically connected in the width direction. The inclined section inclines from the lower edge of the vertical section towards the first outer side and the second outer side.

[0012] A plurality of guiding vanes are arranged in parallel, and their lengths increase sequentially from the inner included angle to the outer included angle of the rectangular frame. The gaps between adjacent guiding vanes form a diffusing channel for the gas to pass through.

[0013] Further, the number of guiding vanes is n, and the n guiding vanes arranged sequentially from the inner included angle to the outer included angle are respectively denoted as the first to the nth stage guiding vanes.

[0014] The rectangular frame includes an outer frame connected by four square straight rods and an inner frame connected by four strip-shaped connecting plates. The cross-sectional shape of the strip-shaped connecting plate is the same as the cross-sectional shape of the guiding vane. The inner frame is fixedly connected inside the outer frame, and the lower edge of the strip-shaped connecting plate is connected to the inner surface of the square straight rod.

[0015] There are also gaps between the strip-shaped connecting plates on the first outer side and the second outer side and the adjacent nth stage guiding vanes, forming a diffusing channel for the gas to pass through.

[0016] Further, the whole rectangular frame is square, and the lengths of the first inner side, the second inner side, the first outer side and the second outer side are all equal.

[0017] The bending position of the guiding vane is on the diagonal of the rectangular frame, and the lengths on both sides of the bending position are equal.

[0018] Further, the two ends of the guiding vane are respectively fixedly connected to the strip-shaped connecting plates on the first inner side and the second inner side of the rectangular frame by welding.

[0019] Further, a rectangular baffle plate adapted to it is provided in the rectangular space between the first stage guiding vane and the rectangular frame.

[0020] Above the rectangular baffle, there is a reinforcing member which is in a cross shape and includes a core column and two reinforcing rods cross-connected to the core column. The bottom of the core column is connected to the rectangular baffle, and the ends of the reinforcing rods are respectively connected to the first-stage guide vanes and the strip-shaped connecting plates on the first and second inner sides.

[0021] Preferably, the inclination angle range of the inclined section of the guide vane is 35° to 75°.

[0022] Furthermore, the inclination angles of all the guide vanes are the same, and the spacing between any two adjacent guide vanes is equal.

[0023] Furthermore, the spacing of all the guide vanes is set to decrease successively from the inner included angle to the outer included angle direction.

[0024] Furthermore, the inclination angles of the inclined sections of all the guide vanes are set to increase successively from the inner included angle to the outer included angle direction.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. The directional diffuser for laboratory of the utility model can be installed at the corner of the ceiling, and can introduce fresh air or cold / warm air-conditioning air into the corner of the laboratory, promoting air circulation at the corner, eliminating ventilation dead corners, improving the safety and comfort of the indoor environment, and helping the experimenters to complete their work better. The air flow diffuses from two fixed directions to the middle of the laboratory through the guide vanes, ensuring the ventilation efficiency and reducing the noise of the air flow hitting the wall at the same time.

[0027] 2. The directional diffuser for laboratory of the utility model has a simple overall structure and strong practicability. By reasonably setting the orientation of the diffuser, it can send air in a specific direction, making the air flow avoid the experimental equipment, meeting the use needs of modern laboratories, reducing the interference to experimental equipment such as fume hoods in the laboratory while achieving good ventilation, and ensuring the normal progress of the experiment. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the installation environment of the directional diffuser for laboratory;

[0029] Figure 2 is a schematic diagram of the structure of the directional diffuser for laboratory;

[0030] Figure 3 is a bottom view of the rectangular frame and the guide vanes;

[0031] Figure 4 is Figure 3 the isometric sectional view of the A-A section in

[0032] Figure 5It is an axonometric view of a rectangular frame and guide vanes;

[0033] Figure 6 It is a schematic diagram of the shape and arrangement rule of the guide vanes in Embodiment 1;

[0034] Figure 7 It is a schematic diagram of the shape and arrangement rule of the guide vanes in Embodiment 2;

[0035] Figure 8 It is a schematic diagram of the shape and arrangement rule of the guide vanes in Embodiment 3.

[0036] Reference numerals in the attached drawings:

[0037] 1 - Ventilation system, 101 - Outlet duct, 2 - Ceiling, 3 - Wall, 4 - Fume hood;

[0038] 10 - Inlet duct, 20 - Rectangular frame, 201 - First inner side, 202 - Second inner side, 203 - First outer side, 204 - Second outer side, 205 - Inner included angle, 206 - Outer included angle, 21 - Outer frame, 211 - Square straight rod, 22 - Inner frame, 221 - Strip-shaped connecting plate, 30 - Guide vane, 301 - First-stage guide vane, 30n - nth-stage guide vane, 31 - Vertical section, 32 - Inclined section, 41 - Rectangular baffle, 42 - Reinforcement, 421 - Core column, 422 - Reinforcement rod. Detailed implementation manners

[0039] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the following embodiments will specifically describe the directional diffuser for laboratory use of the present utility model in conjunction with the accompanying drawings.

[0040] Embodiment

[0041] As Figure 1 、 2 shown, the directional diffuser for laboratory use in this embodiment includes an inlet duct 10, a rectangular frame 20 and a plurality of guide vanes 30, wherein:

[0042] The inlet of the inlet duct 10 is connected to the outlet duct 101 of the ventilation system 1, and the rectangular frame 20 is horizontally installed on the ceiling 2 of the laboratory room and is connected to the outlet of the inlet duct 10. As Figures 3 to 5As shown in the figure, the four sides of the rectangular frame 20 are respectively the first inner-side edge 201, the second inner-side edge 202, the first outer-side edge 203, and the second outer-side edge 204. There is an inner included angle 205 between the first inner-side edge 201 and the second inner-side edge 202, and an outer included angle 206 between the first outer-side edge 203 and the second outer-side edge 204. The guiding vane 30 is located inside the rectangular frame 20, and its two ends are respectively connected to the first inner-side edge 201 and the second inner-side edge 202 of the rectangular frame 20. The guiding vane 30 is bent in an L shape in the length direction and includes a vertical section 31 and an inclined section 32 that are vertically connected in the width direction. The inclined section 32 inclines from the lower edge of the vertical section 31 towards the first outer-side edge 203 and the second outer-side edge 204. A plurality of guiding vanes 30 are arranged in parallel, and their lengths increase sequentially from the inner included angle 205 to the outer included angle 206 of the rectangular frame 20. The gaps between adjacent guiding vanes 30 form a flow-dispersion channel for the gas to pass through.

[0043] For the convenience of description, a total of n guiding vanes 30 arranged sequentially from the inner included angle 205 to the outer included angle 206 are respectively denoted as the first to the nth-stage guiding vanes.

[0044] Specifically, the rectangular frame 20 includes an outer frame 21 connected by four square straight rods 211 and an inner frame 22 connected by four strip-shaped connecting plates 221. The cross-sectional shape of the strip-shaped connecting plate 221 is the same as the cross-sectional shape of the guiding vane 30. The inner frame 22 is fixedly connected inside the outer frame 21, and the lower edge of the strip-shaped connecting plate 221 is connected to the inner surface of the square straight rod 211. The two ends of the guiding vane 30 are respectively fixedly connected to the strip-shaped connecting plates 221 on the first inner-side edge 201 and the second inner-side edge 202 of the rectangular frame 20 by welding. There are also gaps between the strip-shaped connecting plates 221 on the first outer-side edge 203 and the second outer-side edge 204 and the adjacent guiding vane 30 (the nth-stage guiding vane 30n), forming a flow-dispersion channel for the gas to pass through.

[0045] In this embodiment, the rectangular frame 20 is a square as a whole, and the lengths of its four sides (the first inner-side edge 201, the second inner-side edge 202, the first outer-side edge 203, and the second outer-side edge 204) are all equal. The bending position of the guiding vane 30 is on the diagonal of the rectangular frame 20, and the lengths on both sides of the bending position are equal.

[0046] Furthermore, a rectangular baffle 41 adapted to it is provided in the rectangular space between the first-stage guiding vane 301 and the rectangular frame 20. A reinforcing member 42 is provided above the rectangular baffle 41. The reinforcing member 42 is in a cross shape and includes a core column 421 and two reinforcing rods 422 cross-connected to the core column 421. The bottom of the core column 421 is connected to the rectangular baffle 41, and the ends of the reinforcing rods 422 are respectively connected to the first-stage guiding vane 301 and the strip-shaped connecting plates 221 at the first and second inner-side edges.

[0047] Further, as Figure 6 shown, the inclination angle (i.e., the angle θ between the inclined section and the vertical direction) of the inclined section 32 of the guide vane 30 ranges from 35° to 75°. In this embodiment, the inclination angles of the respective guide vanes 30 are the same, all being 75°, and the spacing d between any two adjacent guide vanes 30 is equal, and the air outlet of each diffuser channel is uniform and stable.

[0048] In practical applications, the laboratory-oriented diffuser of this embodiment can be installed at the corner position of the ceiling 2. The first inner side 201 and the second inner side 202 of the rectangular frame 20 are abutted against the wall 3, and the inclined section 32 of the guide vane 30 is inclined away from the wall 3, so that fresh air or cold / warm air-conditioning air can be introduced into the corner area of the laboratory, promoting air circulation at the corner, eliminating ventilation dead corners, and improving the safety and comfort of the indoor environment. The air flow diffuses from two fixed directions through the guide vane 30 towards the middle of the laboratory, ensuring the ventilation efficiency and at the same time reducing the noise of the air flow hitting the wall 3.

[0049] In practical applications, the laboratory-oriented diffuser of this embodiment can also be installed at any non-corner position according to needs. By reasonably setting the orientation of the diffuser, air can be supplied in a specific direction, enabling the air flow to avoid the experimental equipment, reducing interference with experimental equipment such as the fume hood 4 in the laboratory while achieving good ventilation, and ensuring the normal progress of the experiment.

[0050] Embodiment 2

[0051] This embodiment provides a laboratory-oriented diffuser, which only differs from Embodiment 1 in the arrangement rule of the guide vanes 30. The same symbols are given to the same structures as in Embodiment 1 and the same descriptions are omitted.

[0052] As Figure 6 、 7 shown, in Embodiment 1, the spacing distance d between any two adjacent guide vanes 30 is equal; while in this embodiment, the spacing d of each guide vane 30 is set to gradually decrease from the inside (the first inner side 201 / the inner included angle 205 / the second inner side 202) to the outside (the first outer side 203 / the outer included angle 206 / the second outer side 204), that is, the gap (diffuser channel) of the guide vane 30 closer to the inner included angle 205 is larger, and the gap (diffuser channel) of the guide vane 30 closer to the outer included angle 206 is smaller. When the diffuser is installed at the corner of the ceiling 2, the diffuser channels that gradually decrease from the inside to the outside can ensure sufficient air volume at the inner position of the wall corner, help to promote air circulation at the wall corner, and thus promote the air circulation of the entire indoor environment.

[0053] Embodiment 3

[0054] This embodiment provides a directional diffuser for laboratory use. It only differs from Embodiment 1 in the variation law of the inclination angle of the guide vane 30. The same symbols are given to the same structures as in Embodiment 1 and the same descriptions are omitted.

[0055] As Figure 6 , 8 shown, in Embodiment 1, the inclination angles θ of the inclined sections 32 of all the guide vanes 30 are the same; while in this embodiment, the inclination angles θ of the inclined sections 32 of the guide vanes 30 are set to increase gradually from the inside (the first inner side 201 / inner included angle 205 / second inner side 202) to the outside (the first outer side 203 / outer included angle 206 / second outer side 204), that is, the inclination angle of the guide vane 30 closer to the inner included angle 205 is smaller, and the inclination angle closer to the outer included angle 206 is larger. When the diffuser is installed at the corner of the ceiling 2, the gradually increasing inclination angle from the inside to the outside can ensure sufficient air volume at the inner position of the wall corner, which helps to promote the air circulation at the wall corner and further promotes the air circulation of the entire indoor environment.

[0056] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention.

Claims

1. A directional diffuser for laboratory use, characterized in that: It includes an air inlet pipe, a rectangular frame and a plurality of guide blades, wherein: The inlet of the air inlet pipe is connected to the outlet pipe of the ventilation system, and the rectangular frame is horizontally installed on the indoor ceiling and connected to the outlet of the air inlet pipe; The four sides of the rectangular frame are respectively a first inner side, a second inner side, a first outer side and a second outer side, an inner angle is formed between the first inner side and the second inner side, and an outer angle is formed between the first outer side and the second outer side; The guide blade is located inside the rectangular frame, and two ends thereof are respectively connected to a first inner side edge and a second inner side edge of the rectangular frame; The guide blade is bent in an L shape in the length direction, and comprises a vertical section and an inclined section connected up and down in the width direction, and the inclined section is inclined from the lower edge of the vertical section toward the first outer side and the second outer side; The plurality of guide blades are arranged in parallel and their lengths increase in sequence from the inner angle to the outer angle of the rectangular frame, and the gaps between adjacent guide blades form a diffuser channel for gas to pass through.

2. The directional diffuser for laboratory use according to claim 1, characterized in that: The number of the guide blades is n, and the n guide blades arranged in sequence from the inner angle to the outer angle are respectively recorded as first to nth stage guide blades; The rectangular frame includes an outer frame formed by connecting four square straight bars and an inner frame formed by connecting four strip connecting plates, the cross-sectional shape of the strip connecting plates is consistent with the cross-sectional shape of the guide blades, the inner frame is fixedly connected to the inner side of the outer frame, and the lower edge of the strip connecting plates is connected to the inner side surface of the square straight bars; A gap is also left between the first outer side and the second outer side strip-shaped connecting plate and the adjacent n-th stage guide blades to form a diffuser channel for gas to pass through.

3. The directional diffuser for laboratory use according to claim 1, characterized in that: The rectangular frame is a square as a whole, and the first inner side, the second inner side, the first outer side and the second outer side are all equal in length; The bending position of the guide blade is on the diagonal line of the rectangular frame, and the two sides of the bending position are of equal length.

4. The directional diffuser for laboratory use according to claim 2, characterized in that: The two ends of the guide blade are respectively fixedly connected to the strip connecting plates on the first inner side and the second inner side of the rectangular frame by welding.

5. The directional diffuser for laboratory use according to claim 2, characterized in that: A rectangular baffle adapted to the first-stage guide blade and the rectangular frame is provided in the rectangular space between the first-stage guide blade and the rectangular frame; A reinforcement piece is arranged above the rectangular baffle, which is in a cross shape and includes a core column and two reinforcement rods cross-connected to the core column. The bottom of the core column is connected to the rectangular baffle, and the ends of the reinforcement rods are respectively connected to the first-stage guide blades and the first and second inner side strip connecting plates.

6. The directional diffuser for laboratory use according to claim 1, characterized in that: The inclination angle of the inclined section of the guide blade ranges from 35° to 75°.

7. The directional diffuser for laboratory use according to claim 6, characterized in that: The inclination angles of the guide blades are the same, and the distances between any two adjacent guide blades are equal.

8. The directional diffuser for laboratory use according to claim 1, characterized in that: The spacing between the guide blades is arranged to decrease in sequence from the inner angle to the outer angle.

9. The directional diffuser for laboratory use according to claim 6, characterized in that: The inclination angles of the inclined sections of the guide blades are arranged to increase in sequence from the inner angle to the outer angle.

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