A centrifugal dust pre-filter

Abstract

The present invention discloses a centrifugal dust pre-filter, comprising an outer shell, an air intake shell and a stainless steel clamp, wherein the outer shell and the air intake shell are connected by threads or buckles, the air intake shell is provided with an air intake ramp along the inner circumference, an intermediate connecting seat is fixed to the inner side of the air intake ramp, a supporting seat is fixed to the intermediate connecting seat, a centrifugal fan assembly is installed on the supporting seat, a locking groove is also provided on the bottom end side of the intermediate connecting seat, the stainless steel clamp is sleeved on the outer circumference of the bottom end of the intermediate connecting seat, and more than one dust exhaust port is also provided on the outer circumference of the outer shell; the present invention has the advantages of simple structure, can effectively prevent external impurities from directly entering the air filter, and prolong the service life of the air filter.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air filters, in particular to a centrifugal dust pre-filter. Background Art

[0002] A car air filter is an item that removes particulate impurities from the air inside a car. A car air filter can effectively reduce the amount of pollutants that enter the car and prevent the inhalation of pollutants that are harmful to the body.

[0003] The air filter inlet on current cars has basically no protection, and air is taken in directly, which makes it easy for water and debris to enter. Or a protective net can be installed to prevent large debris from entering; or a rain cap can be installed to prevent large debris and rain, mud and water from entering. However, the air inlet as a whole has no dust removal function. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a centrifugal dust pre-filter, which has a simple structure and can effectively prevent external impurities from directly entering the air filter, thereby extending the service life of the air filter.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A centrifugal dust pre-filter comprises an outer shell, an air intake shell and a stainless steel clamp, wherein the outer shell and the air intake shell are connected by threads or snaps, the air intake shell is provided with an air intake ramp along the inner circumference, an intermediate connecting seat is fixed to the inner side of the air intake ramp, a support seat is fixed to the intermediate connecting seat, a centrifugal fan assembly is installed on the support seat, locking grooves are also provided on the bottom end side of the intermediate connecting seat, the stainless steel clamp is sleeved on the outer circumference of the bottom end of the intermediate connecting seat, and the outer shell is provided with more than one dust exhaust port along the outer circumference.

[0007] A further technical solution is that the centrifugal fan assembly includes a fan, a fixed pin, a limit piece, a limit sleeve and a locking nut, the limit piece is installed on the outer circumference of the fixed pin, the limit sleeve is connected to the lower end of the fixed pin, the fan can be rotatably connected to the outer side of the limit piece, the bottom end of the fixed pin is threadedly connected with a locking nut, the fixed pin passes through the center position of the support seat, the limit sleeve is threaded or interference fit or sleeved on the lower end of the fixed pin, the fixed pin can be fixed on the support seat through the limit sleeve and the locking nut, and the fan can rotate relative to the fixed pin through the limit pieces on the upper and lower sides to generate centrifugal wind force.

[0008] A further technical solution is that a dust cover is installed at the upper end of the fan and above the fixed pin shaft, which mainly plays a dust-proof effect and extends the service life of the centrifugal fan assembly. The installation method can be threaded or interference fit or other installation methods.

[0009] A further technical solution is that the width of the upper and lower ends of the outer side of the fan is greater than the width of the upper and lower ends of the inner side, so that the centrifugal wind force generated is greater.

[0010] A further technical solution is that when the outer shell and the air intake shell are connected by snap-fit, barbed snap-fits are distributed on the outer circumference of the outer shell and the air intake shell for snap-fitting the outer shell and the air intake shell.

[0011] A further technical solution is that there are notches at the bottom of the intermediate connecting seat. When the stainless steel hoop is too tightly sleeved on the outer circumference of the bottom of the intermediate connecting seat and is difficult to remove, the notch can be pressed inward to bend the intermediate connecting seat inward, which can facilitate the stainless steel hoop to detach from the bottom of the intermediate connecting seat.

[0012] The beneficial effects of the present invention are:

[0013] 1. Installing this pre-filter at the air inlet of the air filter can effectively prevent large debris, rainwater, muddy water from entering, and can also discharge some dust to prevent dust from entering the air filter, thus extending the service life of the air filter;

[0014] 2. Through the centrifugal force of the centrifugal fan assembly, the dust can be thrown out of the pre-filter through the dust outlet to achieve the filtering effect;

[0015] 3. The intake shell adopts the design of the inclined surface of the intake ramp, which allows air to enter from the lower part to the upper part to prevent the entry of mud and water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a front view of a centrifugal dust pre-filter of the present invention;

[0018] Figure 2 An exploded view of a centrifugal dust pre-filter of the present invention;

[0019] Figure 3 A cross-sectional view of a centrifugal dust pre-filter of the present invention;

[0020] Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0021] Figure 5 It is a schematic diagram of a centrifugal fan assembly in a centrifugal dust pre-filter of the present invention;

[0022] Figure 6 It is a schematic diagram of a support seat connected to an intermediate connection seat in a centrifugal dust pre-filter of the present invention;

[0023] Figure 7 This is a schematic diagram of a centrifugal dust pre-filter installed on an air filter according to the present invention.

[0024] Figure 1-7 In: 1-housing, 2-air inlet housing, 3-centrifugal fan assembly, 4-stainless steel clamp, 5-dust exhaust port, 6-air inlet, 7-air inlet ramp, 8-hook buckle, 9-locking groove, 10-support seat, 11-air filter, 12-middle connecting seat, 13-notch, 31-fan, 32-dust cover, 33-limiting piece, 34-fixing pin, 35-locking nut. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] See also Figures 1 to 7 As shown, a centrifugal dust pre-filter includes an outer shell 1, an air intake shell 2 and a stainless steel clamp 4. The outer shell 1 and the air intake shell 2 are connected by threads or buckles. The air intake shell 2 is provided with an air intake ramp 7 along the inner circumference. An intermediate connecting seat 12 is fixed to the inner side of the air intake ramp 7. A support seat 10 is fixed to the intermediate connecting seat 12. A centrifugal fan assembly 3 is installed on the support seat 10. A locking groove 9 is also distributed on the bottom end side of the intermediate connecting seat 12. The stainless steel clamp 4 is sleeved on the outer circumference of the bottom end of the intermediate connecting seat 12. The outer shell 1 is also provided with more than one dust exhaust port 5 along the outer circumference.

[0027] The centrifugal fan assembly 3 includes a fan 31, a fixed pin shaft 34, a limiting member 33, a limiting sleeve 36 and a locking nut 35. The limiting member 33 is installed on the outer circumference of the fixed pin shaft 34, the limiting sleeve 36 is connected to the lower end of the fixed pin shaft 34, the fan 31 is rotatably connected to the outer side of the limiting member 33, the bottom end of the fixed pin shaft 34 is threadedly connected with the locking nut 35, the fixed pin shaft 34 passes through the center position of the support seat 10, the limiting sleeve 36 is threaded or interference fit or sleeved on the lower end of the fixed pin shaft 34, the fixed pin shaft 34 can be fixed to the support seat 10 through the limiting sleeve 36 and the locking nut 35, and the fan 31 can generate centrifugal wind force by rotating the limit members 33 on the upper and lower sides relative to the fixed pin shaft 34, wherein the limit member 33 can be a bearing or an ordinary plastic part. When the limit member 33 is a bearing, the bearing is fixed on the fixed pin shaft 34, and the fan 31 is fixed on the bearing, and the fan 31 can rotate relative to the fixed pin shaft 34. When the limit member 33 is an ordinary plastic part, the ordinary plastic part is relatively fixed to the fixed pin shaft 34 by locking the limit sleeve 36 and the fixed pin shaft 34. A gap is left between the fan 31 and the limit member 33. When wind blows, the fan 31 will rotate around the limit member 33.

[0028] A dust cover 32 is also installed at the upper end of the fan 31 and above the fixed pin 34. It mainly plays a dustproof effect and prolongs the service life of the centrifugal fan assembly 3. The installation method can be threaded or interference fit or other installation methods. The width of the upper and lower ends of the outer side of the fan 31 is greater than the width of the upper and lower ends of the inner side, and the centrifugal wind force generated is greater. When the outer shell 1 and the air intake shell 2 are connected by snap-fit, the outer circumference of the outer shell 1 and the air intake shell 2 is distributed with a barb-type snap-fit ​​8, which is used to snap-fit ​​the outer shell 1 and the air intake shell 2. A notch 13 is also distributed at the bottom of the intermediate connecting seat 12. When the stainless steel clamp 4 is too tight on the outer circumference of the bottom of the intermediate connecting seat 12 and is difficult to remove, the notch 13 can be pressed inward to bend the intermediate connecting seat 12 inward, which can facilitate the stainless steel clamp 4 to detach from the bottom of the intermediate connecting seat 12.

[0029] In this embodiment, the external air enters the inner side of the housing 1 from the air inlet 6 between the inclined plates 7 and the inclined plates 7, and after entering, the fan 31 in the centrifugal fan assembly 3 is driven to rotate. The rotation process can discharge part of the dust to prevent the dust from entering the air filter 11, and the dust will be discharged from the dust discharge port 5. Then, the air entering the inner side of the housing 1 enters the middle connecting seat 12 from the top of the middle connecting seat 12, passes through the through hole 15 on the support seat 10, and is discharged from the bottom end of the middle connecting seat 12, and finally enters the air filter 11. Figure 7As shown, it is a schematic diagram of the entire centrifugal dust pre-filter installed on the air filter 11. The installation process is to use the stainless steel clamp 4 to be sleeved on the bottom end of the intermediate connecting seat 12, and then lock the stainless steel clamp 4 and use the locking groove 9 at the bottom end of the intermediate connecting seat 12 to make the bottom end of the intermediate connecting seat 12 slowly clamp the air pipe port at the top end of the air filter 11.

[0030] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention.

Claims

1. A centrifugal dust pre-filter, characterized in that: It includes an outer shell, an air intake shell and a stainless steel clamp, the outer shell and the air intake shell are connected by threads or snaps, the air intake shell is provided with an air intake ramp along the inner circumference, an intermediate connecting seat is fixed on the inner side of the air intake ramp, a support seat is fixed on the intermediate connecting seat, a centrifugal fan assembly is installed on the support seat, a locking groove is also distributed on the bottom end side of the intermediate connecting seat, the stainless steel clamp is sleeved on the outer circumference of the bottom end of the intermediate connecting seat, and the outer shell is provided with more than one dust exhaust port along the outer circumference.

2. A centrifugal dust pre-filter according to claim 1, characterized in that: The centrifugal fan assembly includes a fan, a fixed pin shaft, a limit piece, a limit sleeve and a locking nut. The limit piece is installed on the outer circumference of the fixed pin shaft, the limit sleeve is connected to the lower end of the fixed pin shaft, the fan is rotatably connected to the outer side of the limit piece, and the bottom end of the fixed pin shaft is threadedly connected with a locking nut.

3. A centrifugal dust pre-filter according to claim 2, characterized in that: A dust cover is also installed on the upper end of the fan and above the fixed pin shaft.

4. A centrifugal dust pre-filter according to claim 2, characterized in that: The width of the upper and lower ends of the outer side of the fan is greater than the width of the upper and lower ends of the inner side.

5. The centrifugal dust pre-filter according to claim 1, characterized in that: When the outer shell and the air intake shell are connected by snap fasteners, barb-type snap fasteners are distributed on the outer circumferences of the outer shell and the air intake shell.

6. A centrifugal dust pre-filter according to claim 1, characterized in that: The bottom end of the intermediate connecting seat is also provided with notches.

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