CN215333642U - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
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- CN215333642U CN215333642U CN202121788638.8U CN202121788638U CN215333642U CN 215333642 U CN215333642 U CN 215333642U CN 202121788638 U CN202121788638 U CN 202121788638U CN 215333642 U CN215333642 U CN 215333642U
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- air inlet
- air
- centrifugal fan
- connecting pipe
- shell
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Abstract
The utility model relates to a centrifugal fan, belonging to the technical field of centrifugal fans, comprising a centrifugal fan, a fan cover, a fan blade and a fan blade, wherein the fan blade is arranged in the fan cover and used for pressurizing air in the fan blade; a circular mounting groove formed in the shell is formed in the side edge of the first air inlet, a connecting pipe is mounted in the mounting groove, and a lantern ring is arranged on the outer side of the connecting pipe; the utility model better solves the problem of air leakage of the air inlet plate of the centrifugal fan and can improve the air inlet efficiency of the centrifugal fan according to the use condition.
Description
Technical Field
The utility model belongs to the technical field of centrifugal fans, and particularly relates to a centrifugal fan.
Background
The centrifugal fan is a driven fluid machine which is used for ventilating, dust discharging and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilating and draught of boilers and industrial kilns, cooling and ventilating of air conditioning equipment and household electrical equipment, drying and sorting of grains, inflating and propelling of wind tunnel wind sources and air cushion boats and the like; most centrifugal fan's on the existing market air inlet plate form is single, can not change air inlet efficiency according to the in service behavior.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a centrifugal fan scheme to solve the problem of air inlet efficiency.
The utility model realizes the purpose through the following technical scheme:
a centrifugal fan comprises a shell, a fan impeller arranged in the shell and an air outlet pipeline arranged on the shell, wherein a first air inlet is formed in one side edge of the fan impeller, an air inlet plate is arranged at the position of the first air inlet, and a first filter screen is arranged at the center of the air inlet plate; a return pipe is detachably mounted on the side wall of the air outlet pipeline, and a return port is formed in the side wall of the return pipe; still be equipped with a plurality of second air intakes on the lateral wall of casing, second air intake department of every department all is equipped with the second filter screen.
As a further optimization scheme of the utility model, an installation groove is arranged at the side edge of the first air inlet, a connecting pipe is installed in the installation groove, and a lantern ring is arranged at the outer side of the connecting pipe; the inner side of the air inlet plate is provided with a sleeve matched with the connecting pipe, and the outer diameter of the air inlet plate is larger than that of the connecting pipe; the outer diameter of the air inlet plate is larger than that of the connecting pipe, so that the air inlet plate is convenient to mount.
As a further optimized scheme of the utility model, the side surface of the connecting pipe is provided with threads, the lantern ring is in threaded connection with the connecting pipe, the top of the lantern ring is provided with a sealing gasket, and the sealing gasket is matched with the bottom of the air inlet plate; the lantern ring can move to the position of laminating with the air inlet plate along the screw thread to seal the gap between air inlet plate and the casing.
As a further optimized scheme of the utility model, the pore diameter of the second filter screen is larger than that of the first filter screen; first filter screen can the filtering small size granule in the air, prevents that small volume casing from destroying centrifugal fan inner structure, and the second air intake can improve centrifugal fan's air inlet efficiency.
As a further optimized scheme of the utility model, the outer side surfaces of the second air inlets are respectively hinged with a baffle plate, and the baffle plates are used for covering the second air inlets.
As a further optimized scheme of the utility model, the backflow port is arranged above the first air inlet; under the condition that needs heating stoving, establish the air outlet in the air intake top, can improve the speed that the air removed for the air intensifies rapidly.
The utility model has the beneficial effects that:
1) the shell is provided with a first air inlet and a second air inlet, the first air inlet is used for normal air inlet, the second air inlet can be used under the condition that the surrounding environment is free of impurities, and the first air inlet and the second air inlet are used simultaneously, so that the air inlet efficiency of the centrifugal fan can be improved;
2) still be equipped with the return line simultaneously on the air-out pipeline, this return line is used for connecting the equipment by the air-blast, and then can improve air circulation rate, promotes work efficiency.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is a schematic view of the collar structure of the present invention.
In the figure: 1. a housing; 2. an air inlet plate; 3. a first air inlet; 4. a collar; 5. a connecting pipe; 6. a sleeve; 7. sealing gaskets; 8. mounting grooves; 9. a first filter screen; 10. a second filter screen; 11. a second air inlet; 12. a baffle plate; 13. a return pipe; 14. a return port; 15. and (4) an air outlet pipeline.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As shown in fig. 1-3, a centrifugal fan includes a housing 1 and an air inlet plate 2, an impeller for pressurizing air inside the housing 1 is installed in the housing 1, a first air inlet 3 provided on the housing 1 is provided on a side surface of the impeller, the air inlet plate 2 is installed on the housing 1 and is matched with the first air inlet 3, a circular mounting groove 8 provided on the housing 1 is provided at a side edge of the first air inlet 3, a connecting pipe 5 is installed in the mounting groove 8, and a collar 4 is provided outside the connecting pipe 5.
The sleeve pipe 6 that matches each other with connecting pipe 5 internal diameter is installed to one side that the air inlet plate 2 is close to the impeller, and the air inlet plate 2 passes through sleeve pipe 6 and 5 interference fit joint of connecting pipe on sleeve pipe 6, and wherein, the external diameter of air inlet plate 2 is greater than the external diameter of connecting pipe 5.
The side of connecting pipe 5 is equipped with the screw thread, and lantern ring 4 passes through the relation and the connecting pipe 5 interconnect of screw thread, and the top of lantern ring 4 is equipped with seal gasket 7, and seal gasket 7 matches each other with the bottom of air inlet plate 2.
The air inlet plate 2 is provided with a first filter screen 9, and the first filter screen 9 is at least provided with two layers.
A second air inlet 11 formed in the shell 1 is formed in the side face of the air inlet plate 2, and second filter screens 10 are hinged in the second air inlets 11, wherein the aperture of each second filter screen 10 is larger than that of each first filter screen 9; the second air inlets 11 are provided with a plurality of second air inlets 11, and the side surfaces of the second air inlets 11 are provided with baffle plates 12 which are hinged on the shell 1 and matched with the second air inlets 11.
Still be equipped with the air-out device on casing 1, the air-out device is including installing air-out pipeline 15 on casing 1, and the back flow 13 is installed to the side detachable of air-out pipeline 15, and return opening 14 has been seted up to the bottom of back flow 13, and wherein, return opening 14 sets up in the top department of first air intake 3.
The working mode is as follows: the impeller for pressurizing gas inside the shell 1 is installed inside the shell 1, the side face of the impeller is provided with a first air inlet 3 formed in the shell 1, and meanwhile, the shell 1 is also provided with a second air inlet 11, when the centrifugal fan is used, a first filter screen 9 for preventing external small-volume objects from entering the interior of the centrifugal fan needs to be installed in the first air inlet 3, and the first filter screen 9 can interfere with the air inlet efficiency of the centrifugal fan, so that the second air inlet 11 can be opened under the condition that the surrounding environment is free of impurities, air can enter the centrifugal fan from the first air inlet 3 and the second air inlet 11 simultaneously, and in actual use, the gas utilization efficiency close to the center of the impeller is optimal, so that the second air inlet 3 can be formed close to the impeller as much as possible, or the second air inlet 3 is installed on the air inlet plate 2 and serves as a spare gas exchange channel;
the air inlet plate 2 is provided with a sleeve 6, the sleeve 6 is clamped in a connecting pipe 5 arranged at the first air inlet 3, the outer side of the connecting pipe 5 is provided with a lantern ring 4 in a threaded manner, one end of the lantern ring 4 close to the air inlet plate 2 is provided with a sealing gasket 7, the air tightness between the air inlet plate 2 and the shell 1 can be improved, and the air leakage can be prevented;
still be equipped with the air-out device on casing 1, the air-out device includes air-out pipeline 15 and back flow 13, if under the condition of drying, will be used for air-out pipeline to connect on the equipment by the air-blast, and then form a hot air power circulation, can improve air circulation rate for the air heaies up rapidly.
When the centrifugal fan is used, the first air inlet of the centrifugal fan is used for normal air inlet, the second air inlet can be used under the condition that the surrounding environment is free of impurities, and when the first air inlet and the second air inlet are used simultaneously, the air inlet efficiency of the centrifugal fan can be improved; further, the centrifugal fan is often used for cooling or heating air blowing equipment, and therefore, the return pipeline is communicated with an air port of the air blown equipment to form circulation, so that the air circulation rate can be increased on one hand, and the corresponding cooling or heating work efficiency can be improved on the other hand.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. A centrifugal fan, its characterized in that: the air conditioner comprises a shell (1), a fan impeller arranged in the shell and an air outlet pipeline (15) arranged on the shell (1), wherein a first air inlet (3) is formed in one side edge of the fan impeller, an air inlet plate (2) is arranged at the first air inlet (3), and a first filter screen (9) is arranged at the center of the air inlet plate (2); a return pipe (13) is detachably mounted on the side wall of the air outlet pipeline (15), and a return opening (14) is formed in the side wall of the return pipe (13); the lateral wall of the shell (1) is also provided with a plurality of second air inlets (11), and a second filter screen (10) is arranged at each second air inlet (11).
2. The centrifugal fan according to claim 1, wherein: a mounting groove (8) is formed in the side edge of the first air inlet (3), a connecting pipe (5) is mounted in the mounting groove (8), and a lantern ring (4) is arranged on the outer side of the connecting pipe (5); the inboard of air inlet plate (2) is equipped with sleeve pipe (6) that mutually match with connecting pipe (5), the external diameter of air inlet plate (2) is greater than the external diameter of connecting pipe (5).
3. A centrifugal fan according to claim 2, wherein: the side of connecting pipe (5) is equipped with the screw thread, lantern ring (4) and connecting pipe (5) threaded connection, the top of lantern ring (4) is equipped with seal gasket (7), and seal gasket (7) match each other with the bottom of air inlet plate (2).
4. A centrifugal fan according to claim 3, wherein: the aperture of the second filter screen (10) is larger than that of the first filter screen (9).
5. The centrifugal fan according to claim 1, wherein: the outer side of the second air inlet (11) is hinged with a baffle (12), and the baffle (12) is used for covering the second air inlet (11).
6. The centrifugal fan according to claim 5, wherein: the backflow port (14) is arranged above the first air inlet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121788638.8U CN215333642U (en) | 2021-08-03 | 2021-08-03 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121788638.8U CN215333642U (en) | 2021-08-03 | 2021-08-03 | Centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215333642U true CN215333642U (en) | 2021-12-28 |
Family
ID=79575051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121788638.8U Active CN215333642U (en) | 2021-08-03 | 2021-08-03 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215333642U (en) |
-
2021
- 2021-08-03 CN CN202121788638.8U patent/CN215333642U/en active Active
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