CN215633850U - Waterproof outer exhaust fan box - Google Patents
Waterproof outer exhaust fan box Download PDFInfo
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- CN215633850U CN215633850U CN202122090449.XU CN202122090449U CN215633850U CN 215633850 U CN215633850 U CN 215633850U CN 202122090449 U CN202122090449 U CN 202122090449U CN 215633850 U CN215633850 U CN 215633850U
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Abstract
The utility model relates to the technical field of fan manufacturing, and discloses a waterproof outer exhaust fan box which comprises a base, a centrifugal fan and an upper cover, wherein the base is provided with a first opening and a second opening; the base comprises a bottom plate, a baffle plate and a screen plate, the baffle plate comprises a plurality of side plates which are sequentially connected, the baffle plate is integrally formed, the bottom ends of the side plates and the bottom end of the screen plate are fixed on the upper surface of the bottom plate through spot welding, the baffle plate and the screen plate form a frame-shaped shell in a surrounding mode, and the screen plate is provided with a plurality of air outlet holes; the centrifugal fan is fixed on the bottom plate and is positioned in the shell, and an air inlet of the centrifugal fan is provided with an air guide ring; the upper cover is installed on the shell, an air inlet pipe is arranged above the upper cover, an air inlet of the centrifugal fan is communicated with the air inlet pipe through the air guide ring, the upper cover is provided with a rain blocking sheet, the rain blocking sheet extends downwards from the upper cover, and the rain blocking sheet is located on one surface, back to the centrifugal fan, of the baffle. And on the premise of water resistance, the welding amount is reduced.
Description
Technical Field
The utility model relates to the technical field of fan manufacturing, in particular to a waterproof outer exhaust fan box.
Background
The volute (fan casing) functions to collect the impeller outlet airflow and direct it to the fan outlet, while converting a portion of the kinetic energy of the airflow into pressure energy. The volute profile is optimized as a logarithmic or archimedes spiral with the highest efficiency. The axial surface of the volute is rectangular and has constant width. The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy.
The volute (fan shell) of the centrifugal fan on the market is drawn according to Archimedes' spiral law, and the manufacturing materials of the volute are plastic and iron plates. Plastics form the spiral case appearance through moulding plastics, and the iron plate forms the spiral case through the welding process through shaping or bending region again.
However, because the welding amount of the two surfaces of the volute is large, the requirement can be met only by full welding, the processing time of the full welding is long, the processing cost is high, the assembly and disassembly are inconvenient, when the volute is placed outdoors, the air outlet of the fan shell is likely to be filled with water, the service life of the fan is shortened, and the requirement of the external fan of the B2 type biological safety cabinet cannot be met.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the fan shell is troublesome to weld, and the air outlet is easy to feed water.
In order to solve the technical problem, the utility model provides a waterproof outer exhaust fan box which comprises a base, a centrifugal fan and an upper cover, wherein the base is provided with a first opening and a second opening; the base comprises a bottom plate, a baffle plate and a screen plate, the baffle plate comprises a plurality of side plates which are sequentially connected, the baffle plate is integrally formed, the bottom ends of the side plates and the bottom end of the screen plate are fixed on the upper surface of the bottom plate through spot welding, the baffle plate and the screen plate form a frame-shaped shell in a surrounding mode, and the screen plate is provided with a plurality of air outlet holes; the centrifugal fan is fixed on the bottom plate and is positioned in the shell, and an air inlet of the centrifugal fan is provided with an air guide ring; the upper cover is mounted on the shell, an air inlet pipe is arranged above the upper cover, an air inlet of the centrifugal fan is communicated with the air inlet pipe through the air guide ring, a rain blocking sheet is arranged on the upper cover, the rain blocking sheet extends downwards from the upper cover, and the rain blocking sheet is located on one side of the side plate, back to the centrifugal fan.
Furthermore, the base further comprises an air deflector, the air deflector is located in the shell and fixed to the upper surface of the bottom plate through spot welding, one surface, facing the screen plate, of the air deflector is an arc surface, one side, away from the screen plate, of the air deflector is protruded, and the centrifugal fan is located between the screen plate and the air deflector.
Furthermore, the two opposite ends of the air deflector in the horizontal direction are fixed with the baffle through spot welding.
Furthermore, the upper cover is provided with an installation plate, the air inlet pipe is fixed on the installation plate, and the top end of the air guide ring is fixed on the installation plate.
Furthermore, the upper cover is provided with a rain shielding plate, the rain shielding plate extends downwards from the upper cover in an inclined mode, and the rain shielding plate is located on the side, back to the centrifugal fan, of the screen plate.
Furthermore, the included angle between the plate surface of the rain shielding plate and the horizontal plane is 25-35 degrees.
Further, the bottom plate is provided with a fixed plate, the centrifugal fan is installed on the fixed plate, and the fixed plate is provided with a through hole.
Further, a fixing support is arranged below the bottom plate, and the fixing support is installed on the bottom surface of the bottom plate.
Compared with the prior art, the waterproof external exhaust fan box provided by the embodiment of the utility model has the beneficial effects that: through enclosing integrated into one piece's baffle and otter board into the casing, cover the gap between baffle and the upper cover with the piece that keeps off the rain for the rainwater can't provide waterproof performance in getting into the base from the place outside the otter board, only need spot welding can fixed connection between bottom plate, otter board and the baffle, for traditional fan spiral case, has reduced the welding volume, and the processing cost is lower, and upper cover and base also are convenient for disassemble the maintenance.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is an exploded view of one embodiment of the present invention;
FIG. 3 is a side view of one embodiment of the present invention;
fig. 4 is a schematic diagram of the internal structure of an embodiment of the present invention.
In the figure, 1, a base; 11. a base plate; 112. fixing a bracket; 111. a fixing plate; 12. a baffle plate; 121. a side plate; 13. a screen plate; 131. an air outlet; 14. an air deflector; 2. a centrifugal fan; 21. a wind guide ring; 3. an upper cover; 31. an air inlet pipe; 32. a rain shield; 33. mounting a plate; 34. a flashing.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc., used herein to indicate the orientation or positional relationship, are based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 2, a waterproof outer blower box according to a preferred embodiment of the present invention includes a base 1, a centrifugal blower 2, and an upper cover 3, and is used as an outer blower of a biosafety cabinet type B2.
As shown in fig. 1-3, the base 1 includes a bottom plate 11, a baffle 12 and a mesh plate 13, the baffle 12 is C-shaped, and the baffle 12 is formed by a whole cold-rolled steel plate through cutting and bending, wherein the baffle 12 includes three side plates 121 connected in sequence, two adjacent baffles 12 are 90 degrees each other, and three side plates 121 are integrally formed. The bottom ends of the side plates 121 are fixed to the upper surface of the base plate 11 by spot welding. The bottom end of the screen plate 13 is fixed on the upper surface of the bottom plate 11 through spot welding, the screen plate 13 is provided with a plurality of air outlets 131, the screen plate 13 is an air outlet of the whole waterproof outer exhaust fan box, and gas generated by the biological safety cabinet is extracted by the centrifugal fan 2 and then is exhausted from the air outlets 131. The baffle 12 and the screen plate 13 enclose a rectangular frame-shaped shell, the centrifugal fan 2 is fixed on the bottom plate 11, the centrifugal fan 2 is located in the shell, and the shell is used for protecting the centrifugal fan 2.
As shown in fig. 1 to 4, an air inlet of the centrifugal fan 2 is provided with an air guiding ring 21, and the air guiding ring 21 is used for guiding an air flow to flow into the centrifugal fan 2. The upper cover 3 is mounted on the shell through screws, an air inlet pipe 31 is arranged above the upper cover 3, the air inlet pipe 31 is used for being externally connected with an exhaust pipeline of the biological safety cabinet, an air inlet of the centrifugal fan 2 is communicated with the air inlet pipe 31 through the air guide ring 21, and gas exhausted from the biological safety cabinet sequentially passes through the air inlet pipe 31 and the air guide ring 21 and finally enters the centrifugal fan 2. Upper cover 3 is equipped with rain-proof piece 32, rain-proof piece 32 certainly upper cover 3 downwardly extending, and rain-proof piece 32 is located baffle 12 dorsad centrifugal fan 2's one side, wherein, rain-proof piece 32 is total three, and every curb plate 121's top all has a rain-proof piece 32, and whole upper cover 3 includes that rain-proof piece 32 all forms by a cold-rolled sheet processing, rain-proof piece 32 is used for preventing that the rainwater from getting into the casing from curb plate 121 top, because baffle 12 is a monoblock cold-rolled steel sheet processing and forms, does not have the clearance between curb plate 121 and the curb plate 121, rain-proof piece 32 shelters from the clearance between baffle 12 top and the upper cover 3, can prevent that the rainwater from getting into in the casing on baffle 12.
To sum up, the embodiment of the utility model provides a waterproof outer exhaust fan box, a shell is enclosed by a baffle plate 12 and a mesh plate 13 which are integrally formed, a gap between the baffle plate 12 and an upper cover 3 is covered by a rain shielding sheet 32, so that rainwater cannot enter a base 1 from a place except the mesh plate 13, waterproof performance is provided, the base plate 11, the mesh plate 13 and the baffle plate 12 can be fixedly connected only by spot welding, welding amount is reduced compared with a traditional fan volute, processing cost is lower, and the upper cover 3 and the base 1 are convenient to disassemble and maintain.
As shown in fig. 1-2, the base 1 further includes an air deflector 14, the air deflector 14 is located in the casing, the air deflector 14 is formed by bending a cold-rolled plate, the air deflector 14 is fixed on the upper surface of the bottom plate 11 by spot welding, one surface of the air deflector 14 facing the screen 13 is an arc surface, the air deflector 14 protrudes toward one side away from the screen 13, the centrifugal fan 2 is located between the screen 13 and the air deflector 14, and the air deflector 14 is used for guiding the air blown by the centrifugal fan 2 to the screen 13. The two opposite ends of the air deflector 14 in the horizontal direction are fixed with the baffle 12, the air deflector 14 is fixed with the baffle 12 through spot welding, and the strength of the air deflector 14 can be increased by connecting the air deflector 14 with the baffle 12, so that the air deflector 14 is more stable.
As shown in fig. 1 to 3, the upper cover 3 is provided with a mounting plate 33, the air inlet pipe 31 is fixed to the middle of the mounting plate 33 by spot welding, and the top end of the air guide ring 21 is fixed to the mounting plate 33. In this embodiment, the upper cover 3 is provided with a rain shielding plate 34, the rain shielding plate 34 extends obliquely downward from the upper cover 3, the rain shielding plate 34 is located on a side of the mesh plate 13 facing away from the centrifugal fan 2, and the rain shielding plate 34 is used for preventing rainwater from directly falling on the centrifugal fan 2 through the mesh plate 13 and directly falling on the bottom plate 11, and the rainwater can flow away through the air outlet 131 of the mesh plate 13. The included angle between the surface of the rain shielding plate 34 and the horizontal plane is 25-35 degrees, in this embodiment, the included angle between the surface of the rain shielding plate 34 and the horizontal plane is 30 degrees, and under this angle, when rainwater falling on the rain shielding plate 34 can flow down along the rain shielding plate 34, rainwater falling on the net plate 13 can be shielded to the maximum extent, the surface area of the rain shielding plate 34 can be saved, shielding of the rain shielding plate 34 on the net plate 13 is reduced, and smooth ventilation is ensured. The rain shielding plate 34 is floated to the air outlet 30mm from the upper cover 3 to form a structure similar to the front edge of a house, so that rain is shielded and guided for the air outlet, and the centrifugal fan 2 can not be drenched even if the waterproof outer exhaust fan box is placed on the ground. In other embodiments, without the rain shielding plate 34, the centrifugal fan 2 can be disposed at a position deviated from the center of the bottom plate 11 and far away from the mesh plate 13, so as to ensure that rainwater falling obliquely does not hit the centrifugal fan 2
As shown in fig. 1-4, the bottom plate 11 is provided with a fixing plate 111, the fixing plate 111 is formed by bending a cold-rolled plate, the fixing plate 111 is fixed on the upper surface of the bottom plate 11 through spot welding, the centrifugal fan 2 is installed on the fixing plate 111, a through hole is formed in the fixing plate 111, rainwater falling on the bottom plate 11 can flow away through the through hole, and water accumulation of the bottom plate 11 is avoided. Two fixing supports 112 are arranged below the bottom plate 11, the fixing supports 112 are mounted on the bottom surface of the bottom plate 11, the waterproof external-discharge fan box may be mounted on the ground according to different use environments, if the waterproof external-discharge fan box is mounted on the ground, the bottom plate 11 can be lifted up by the fixing supports 112, the use safety of the centrifugal fan 2 is guaranteed, and each fixing support 112 is formed by bending a cold-rolled plate.
The assembly process of the utility model is as follows: the method comprises the steps of welding an air deflector 14, a fixing plate 111, a screen plate 13, a bottom plate 11 and a baffle plate 12 together through spot welding to form a base 1, welding an installation plate 33 and an air inlet pipe 31 together through spot welding to form an upper cover 3, and finally obtaining the base 1 and the upper cover 3. Base 1 with upper cover 3 is all together fixed through each part spot welding, under guaranteeing 2 waterproof prerequisite of centrifugal fan, has reduced the welding volume for full weld, and process time shortens, and the processing cost is lower, and is convenient for dismouting upper cover 3 and base 1.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a waterproof outer fan box of discharging which characterized in that includes:
the base comprises a bottom plate, a baffle plate and a screen plate, the baffle plate comprises a plurality of side plates which are sequentially connected, the baffle plate is integrally formed, the bottom ends of the side plates and the bottom end of the screen plate are fixed on the upper surface of the bottom plate through spot welding, the baffle plate and the screen plate form a frame-shaped shell in a surrounding mode, and the screen plate is provided with a plurality of air outlet holes;
the centrifugal fan is fixed on the bottom plate and positioned in the shell, and an air inlet of the centrifugal fan is provided with an air guide ring; and
the upper cover is installed on the shell, an air inlet pipe is arranged above the upper cover, an air inlet of the centrifugal fan is communicated with the air inlet pipe through the air guide ring, a rain blocking sheet is arranged on the upper cover, the rain blocking sheet extends downwards from the upper cover, and the rain blocking sheet is located on one side of the side plate, back to the centrifugal fan.
2. The waterproof outer blower box of claim 1, characterized in that: the base further comprises an air deflector, the air deflector is located in the shell and fixed to the upper surface of the bottom plate through spot welding, one surface, facing the screen plate, of the air deflector is an arc surface, one side, far away from the screen plate, of the air deflector is protruded, and the centrifugal fan is located between the screen plate and the air deflector.
3. The waterproof outer blower box of claim 2, characterized in that: and two opposite ends of the air deflector in the horizontal direction are fixed with the baffle through spot welding.
4. The waterproof outer blower box of claim 1, characterized in that: the upper cover is provided with an installation plate, the air inlet pipe is fixed on the installation plate, and the top end of the air guide ring is fixed on the installation plate.
5. The waterproof outer blower box of claim 1, characterized in that: the upper cover is provided with a rain shielding plate, the rain shielding plate extends downwards from the upper cover in an inclined mode, and the rain shielding plate is located on one side, back to the centrifugal fan, of the screen plate.
6. The waterproof outer blower box of claim 5, characterized in that: the included angle between the surface of the rain shielding plate and the horizontal plane is 25-35 degrees.
7. The waterproof outer blower box of claim 1, characterized in that: the bottom plate is provided with a fixed plate, the centrifugal fan is installed on the fixed plate, and the fixed plate is provided with a through hole.
8. The waterproof outer blower box of claim 1, characterized in that: and a fixed support is arranged below the bottom plate and is arranged on the bottom surface of the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122090449.XU CN215633850U (en) | 2021-08-31 | 2021-08-31 | Waterproof outer exhaust fan box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122090449.XU CN215633850U (en) | 2021-08-31 | 2021-08-31 | Waterproof outer exhaust fan box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633850U true CN215633850U (en) | 2022-01-25 |
Family
ID=79905769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122090449.XU Active CN215633850U (en) | 2021-08-31 | 2021-08-31 | Waterproof outer exhaust fan box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215633850U (en) |
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2021
- 2021-08-31 CN CN202122090449.XU patent/CN215633850U/en active Active
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| GR01 | Patent grant | ||
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