CN216342968U - Prevent inside air backflow's centrifugal fan - Google Patents
Prevent inside air backflow's centrifugal fan Download PDFInfo
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- CN216342968U CN216342968U CN202123251212.1U CN202123251212U CN216342968U CN 216342968 U CN216342968 U CN 216342968U CN 202123251212 U CN202123251212 U CN 202123251212U CN 216342968 U CN216342968 U CN 216342968U
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- air outlet
- air
- shell
- mounting seat
- centrifugal fan
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Abstract
A centrifugal fan for preventing internal air from flowing back comprises a shell and an air outlet cylinder; the bottom of the shell is provided with a base; one side of the shell is provided with an air inlet; one side of the shell facing the air inlet is arranged in a circular truncated cone shape; an air outlet cylinder is arranged on one side of the shell far away from the air inlet; the air outlet barrel is vertically arranged, and an air outlet is formed at the bottom of the air outlet barrel; a convex air cavity is arranged on the air outlet cylinder; the inner wall of the shell is provided with a guide plate which is obliquely arranged and faces the air cavity of the air outlet cylinder; the shell is internally provided with a mounting seat and a rotating shaft, and the rotating shaft penetrates through the mounting seat and is fixed on the side wall of the air outlet cylinder; the mounting seat rotates relative to the rotating shaft; a plurality of blades are distributed on the mounting seat in an annular array; the back of the mounting seat is provided with an annular tooth groove, and the air outlet barrel is arranged for guiding to change the air outlet direction; and meanwhile, the air cavity is arranged for pressure reduction, so that the pressure difference value of the air inlet and the air outlet is reduced, and air backflow is prevented.
Description
Technical Field
The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan capable of preventing internal air from flowing back.
Background
The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion; in the use of the centrifugal fan on the market, an air inlet of the centrifugal fan is a negative pressure low pressure area, an air outlet of the centrifugal fan is a positive pressure high pressure area, air flow of the high pressure area easily flows into the low pressure area according to the property of fluid, so that part of the air flow discharged from an air outlet flows back to the air inlet to form backflow, internal leakage loss is caused, and the working efficiency of the centrifugal fan is reduced.
In order to solve the above problem, a centrifugal fan for preventing the backflow of the internal air is provided in the application.
SUMMERY OF THE UTILITY MODEL
Objects of the utility model
In order to solve the technical problems in the background art, the utility model provides a centrifugal fan for preventing internal air from flowing back, wherein an air outlet cylinder is arranged for guiding, and the air outlet direction is changed; and meanwhile, the air cavity 7 is arranged for decompression, so that the pressure difference value of the air inlet and the air outlet is reduced, and air backflow is prevented.
(II) technical scheme
In order to solve the problems, the utility model provides a centrifugal fan for preventing internal air from flowing back, which comprises a shell and an air outlet cylinder;
the bottom of the shell is provided with a base; one side of the shell is provided with an air inlet; one side of the shell facing the air inlet is arranged in a circular truncated cone shape; an air outlet cylinder is arranged on one side of the shell far away from the air inlet; the air outlet barrel is vertically arranged, and an air outlet is formed at the bottom of the air outlet barrel;
a convex air cavity is arranged on the air outlet cylinder; the inner wall of the shell is provided with a guide plate which is obliquely arranged and faces the air cavity of the air outlet cylinder;
the shell is internally provided with a mounting seat and a rotating shaft, and the rotating shaft penetrates through the mounting seat and is fixed on the side wall of the air outlet cylinder; the mounting seat rotates relative to the rotating shaft; a plurality of blades are distributed on the mounting seat in an annular array; the back of the mounting seat is provided with an annular tooth socket.
Preferably, a plurality of threaded holes are preset on the base; the bottom of the base is provided with an anti-slip pad.
Preferably, the air inlet and the air outlet are both provided with isolation nets.
Preferably, one side of the shell is provided with a transmission assembly, and the transmission assembly is connected with the driving motor; one side of the transmission assembly inserted into the shell is provided with a transmission gear.
Preferably, the transmission gear is in meshed transmission connection with a tooth groove on the back of the mounting seat.
Preferably, the inner diameter of the wind cavity is larger than the diameter of the wind inlet.
Preferably, the mounting seat is a hollow seat body.
Preferably, the air outlet cylinder is of a double-layer plate structure, an interlayer is formed, and soundproof cotton is filled in the interlayer.
The technical scheme of the utility model has the following beneficial technical effects:
1. one side of the shell is provided with a transmission assembly, and the transmission assembly is connected with a driving motor; one side of the transmission assembly inserted into the shell is provided with a transmission gear. The transmission gear is in meshed transmission connection with a tooth groove on the back of the mounting seat. The transmission assembly is in meshing transmission connection with a tooth groove at the back of the mounting seat through a transmission gear, so that the mounting seat and the blades are driven to rotate to generate wind power; compared with a fan with a built-in motor, the external structure can compress the volume of the fan, and the fan is favorable for energy storage.
2. The inner diameter of the wind cavity is larger than the diameter of the wind inlet. A pressure reduction area is formed in the air cavity of the air outlet cylinder, air entering the shell from the air inlet is conveyed towards the air cavity under the high-speed rotation of the fan blade and the flow guide effect of the flow guide plate, is subjected to pressure reduction in the air cavity and is conveyed outwards through the air outlet cylinder and the air outlet; the air outlet direction is perpendicular with the air inlet direction, and simultaneously after the decompression, the pressure value at the air outlet and the air inlet is reduced, and the loss caused by gas backflow is reduced.
3. The play dryer is double-deck plate structure to form the intermediate layer, fill soundproof cotton in the intermediate layer, the soundproof cotton that double-deck plate structure cooperation was filled can effectively reduce the vibrations that the fan during operation produced, makes the noise when equipment moves littleer, environmental protection more.
Drawings
Fig. 1 is a schematic view of an overall structure of a centrifugal fan for preventing backflow of internal air according to the present invention.
Fig. 2 is a schematic back structural view of an air outlet cylinder in the centrifugal fan for preventing internal air from flowing back according to the present invention.
Fig. 3 is a schematic view of an internal structure of a casing in a centrifugal fan for preventing backflow of internal air according to the present invention.
Fig. 4 is a schematic structural view of a mounting seat in a centrifugal fan for preventing backflow of internal air according to the present invention.
Reference numerals: 1. an air outlet cylinder; 11. an air outlet; 2. a housing; 21. a baffle; 3. a transmission assembly; 31. a transmission gear; 4. a base; 5. an air inlet; 6. a rotating shaft; 7. a wind cavity; 8. a blade; 9. and (7) mounting a seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-4, the centrifugal fan for preventing internal air from flowing back according to the present invention comprises a housing 2 and an air outlet cylinder 1;
the bottom of the shell 2 is provided with a base 4; one side of the shell 2 is provided with an air inlet 5; one side of the shell 2 facing the air inlet 5 is arranged in a round table shape; an air outlet cylinder 1 is arranged on one side of the shell 2 far away from the air inlet 5; the air outlet barrel 1 is vertically arranged, and an air outlet 11 is formed at the bottom of the air outlet barrel 1;
a convex air cavity 7 is arranged on the air outlet cylinder 1; the inner wall of the shell 2 is provided with a guide plate 21 which is obliquely arranged, and the guide plate 21 is obliquely arranged towards the air cavity 7 of the air outlet cylinder 1;
a mounting seat 9 and a rotating shaft 6 are arranged inside the shell 2, and the rotating shaft 6 penetrates through the mounting seat 9 and is fixed on the side wall of the air outlet cylinder 1; the mounting seat 9 rotates relative to the rotating shaft 6; a plurality of blades 8 are distributed on the mounting seat 9 in an annular array; the back of the mounting seat 9 is provided with an annular tooth socket.
In an alternative embodiment, a plurality of threaded holes are preset on the base 4; the bottom of the base 4 is provided with a non-slip mat.
It should be noted that the casing 2 of the centrifugal fan is assembled with the base 4 through bolts, so as to fix the equipment on the ground; the non-slip mat arranged on the base 4 can play the roles of increasing the friction force and preventing slip.
In an alternative embodiment, isolation nets are arranged at the air inlet 5 and the air outlet 11.
The isolation net can effectively prevent foreign matters from entering the fan so as to avoid damage to the blades; causing unnecessary losses.
In an alternative embodiment, a transmission assembly 3 is arranged on one side of the shell 2, and the transmission assembly 3 is connected with a driving motor; the side of the transmission assembly 3 inserted into the housing 2 is provided with a transmission gear 31. The transmission gear 31 is in meshing transmission connection with a tooth groove at the back of the mounting seat 9.
It should be noted that the transmission assembly 3 is in meshed transmission connection with a tooth socket on the back of the mounting base 9 through the transmission gear 31, so as to drive the mounting base 9 and the blades 8 to rotate to generate wind power; compared with a fan with a built-in motor, the external structure can compress the volume of the fan, and the fan is favorable for energy storage.
In an alternative embodiment, the inner diameter of the wind chamber 7 is larger than the diameter at the wind inlet 5.
It should be noted that a pressure reduction area is formed in the air cavity 7 of the air outlet cylinder 1, and the air entering the interior of the housing 2 from the air inlet 5 is conveyed towards the air cavity 7 under the high-speed rotation of the fan blades 8 and the flow guiding effect of the flow guiding plate 21, is subjected to pressure reduction in the air cavity 7, and is conveyed outwards through the air outlet cylinder 1 and the air outlet 11; the air outlet direction is perpendicular to the air inlet direction, and the pressure values of the air outlet 11 and the air inlet 5 are reduced after pressure reduction, so that the loss caused by gas backflow is reduced.
In an alternative embodiment, the mounting seat 9 is a hollow seat body.
It should be noted that the hollow seat body is lighter in weight and less worn on the rotating shaft 6.
In an alternative embodiment, the air outlet cylinder 1 is a double-layer plate structure and forms a sandwich layer, and sound insulation cotton is filled in the sandwich layer.
It should be noted that the soundproof cotton filled by matching the double-layer plate structure can effectively reduce the vibration generated during the operation of the fan, so that the noise generated during the operation of the equipment is lower and the equipment is more environment-friendly.
In the utility model, the transmission component 3 is in transmission connection with the driving motor, and one side of the transmission component 3 inserted into the shell 2 is provided with a transmission gear 31. The transmission gear 31 is in meshing transmission connection with a tooth groove at the back of the mounting seat 9, so that the mounting seat 9 and the blade 8 are driven to rotate to generate wind power; compared with a fan with a built-in motor, the external structure can compress the volume of the fan, and is beneficial to fan energy storage; when the blades rotate, the air inlet 5 is in a negative pressure state, and air enters the shell 2; driven by the fan blades 2, the gas is pressurized and conveyed towards the air cavity 7 under the flow guiding action of the flow guide plate 21, is decompressed in the air cavity 7 and is conveyed outwards through the air outlet barrel 1 and the air outlet 11; the air outlet direction is vertical to the air inlet direction, and the pressure values at the air outlet 11 and the air inlet 5 are reduced after pressure reduction, so that the loss caused by gas backflow is reduced; the utility model arranges the air outlet cylinder 1 for guiding and changes the air outlet direction; and meanwhile, the air cavity 7 is arranged for decompression, so that the pressure difference value between the air inlet 5 and the air outlet 11 is reduced, and air backflow is prevented.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A centrifugal fan for preventing internal air from flowing back is characterized by comprising a shell (2) and an air outlet cylinder (1);
a base (4) is arranged at the bottom of the shell (2); one side of the shell (2) is provided with an air inlet (5); one side of the shell (2) facing the air inlet (5) is arranged in a circular truncated cone shape; an air outlet cylinder (1) is arranged on one side of the shell (2) far away from the air inlet (5); the air outlet barrel (1) is vertically arranged, and an air outlet (11) is formed at the bottom of the air outlet barrel (1);
a convex air cavity (7) is arranged on the air outlet cylinder (1); the inner wall of the shell (2) is provided with a guide plate (21) which is obliquely arranged, and the guide plate (21) is obliquely arranged towards the air cavity (7) of the air outlet cylinder (1);
a mounting seat (9) and a rotating shaft (6) are arranged in the shell (2), and the rotating shaft (6) penetrates through the mounting seat (9) and is fixed on the side wall of the air outlet cylinder (1); the mounting seat (9) rotates relative to the rotating shaft (6); a plurality of blades (8) are distributed on the mounting seat (9) in an annular array; the back of the mounting seat (9) is provided with an annular tooth socket.
2. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein a plurality of threaded holes are preset on the base (4); the bottom of the base (4) is provided with an anti-skid pad.
3. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein isolation nets are disposed at the air inlet (5) and the air outlet (11).
4. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein a transmission assembly (3) is provided at one side of the casing (2), the transmission assembly (3) being connected with a driving motor; one side of the transmission component (3) inserted into the shell (2) is provided with a transmission gear (31).
5. The centrifugal fan for preventing backflow of internal air according to claim 4, wherein the transmission gear (31) is in meshed transmission connection with a toothed groove at the back of the mounting seat (9).
6. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein an inner diameter of the wind chamber (7) is larger than a diameter at the wind inlet (5).
7. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein the mounting seat (9) is a hollow seat body.
8. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein the outlet cylinder (1) has a double-layer plate structure and forms an interlayer filled with soundproof cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123251212.1U CN216342968U (en) | 2021-12-22 | 2021-12-22 | Prevent inside air backflow's centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123251212.1U CN216342968U (en) | 2021-12-22 | 2021-12-22 | Prevent inside air backflow's centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216342968U true CN216342968U (en) | 2022-04-19 |
Family
ID=81165821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123251212.1U Active CN216342968U (en) | 2021-12-22 | 2021-12-22 | Prevent inside air backflow's centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216342968U (en) |
-
2021
- 2021-12-22 CN CN202123251212.1U patent/CN216342968U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Centrifugal fan for preventing internal air backflow Effective date of registration: 20220513 Granted publication date: 20220419 Pledgee: Shandong Wucheng Rural Commercial Bank Co.,Ltd. Pledgor: DEZHOU RUICHENG AIR CONDITIONING EQUIPMENT Co.,Ltd. Registration number: Y2022980005532 |