air prefilter

Abstract

This utility model discloses an air pre-filter, including a housing, a cyclone assembly, and a dust discharge pipe. A dust chamber is formed within the housing. The cyclone assembly includes multiple cyclone tubes arranged side-by-side, each with a corresponding air inlet and dust outlet. The air inlet is connected to the external environment, and the dust outlet is connected to the dust chamber. The dust discharge pipe is located on the side of the dust chamber away from the air inlet, and its axis is parallel to the axis of the cyclone tubes to accelerate dust movement. By aligning the axis of the dust discharge pipe parallel to the axis of the cyclone tubes, this air pre-filter ensures that the dust travels in the same direction before and after passing through the dust chamber. The dust discharge pipe better matches the airflow direction within the cyclone tubes, facilitating faster dust discharge and reducing accumulation within the dust chamber, thereby improving filtration efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of air filtration devices, and more particularly to an air pre-filter. Background Technology

[0002] When an engine is running, it needs to draw in air. To reduce or prevent dust and impurities in the air from entering the engine with the airflow, an air filter is usually installed in the engine intake system to filter the intake air through a filter element. Although the filter element has a good filtering effect, frequent replacement is very costly and inconvenient.

[0003] Existing engine intake systems have added an air pre-filter before the traditional air filter to pre-filter the air entering the filter element. The air pre-filter can filter out a large amount of dust and impurities, keeping the air filter clean for a longer period of time, thereby making the engine run more powerfully. At the same time, it can also extend the service life of the filter element in the air filter, reduce the frequency of replacement, and reduce engine maintenance costs.

[0004] However, the current air pre-filters have a loose layout and low integration of various structures, which not only makes full use of the space of the pre-filter and power machinery, but also causes the gas flow rate in the air pre-filter to decrease rapidly, resulting in low filtration efficiency and poor stability. Utility Model Content

[0005] The purpose of this invention is to provide an air pre-filter. By rationally configuring the relative positions of the cyclone tube, dust exhaust pipe, and air collection hood inside the air pre-filter, the gas flow efficiency and stability are improved, and the integration of the air pre-filter is increased, achieving miniaturization and modularity. The specific technical solution is as follows:

[0006] An air pre-filter includes a housing, a cyclone assembly, and a dust discharge pipe. A dust chamber is formed inside the housing. The cyclone assembly includes multiple cyclone tubes arranged side by side. Each cyclone tube includes a corresponding air inlet and a dust outlet. The air inlet is connected to the external environment, and the dust outlet is connected to the dust chamber. The dust discharge pipe is located on the side of the dust chamber away from the air inlet. The axis of the dust discharge pipe is parallel to the axis of the cyclone tubes to accelerate the movement speed of the dust.

[0007] Furthermore, it also includes a cover, which includes a first port and a second port. The cyclone tube also includes an air outlet, which is located on the side of the dust outlet away from the air inlet. The first port is connected to the air outlet, and the axis of the second port is set parallel to the axis of the air outlet.

[0008] Furthermore, the second port of the cover is positioned away from the dust exhaust pipe to create a gap between the cover and the dust exhaust pipe.

[0009] Furthermore, it also includes a sleeve installed on the cover, which is connected to the dust exhaust pipe.

[0010] Furthermore, the housing has a first bottom wall positioned relative to the ground, and a dust exhaust pipe is positioned near one end of the first bottom wall.

[0011] Furthermore, the cyclone tube includes an inlet pipe, an outlet pipe, and cyclone blades. The inlet is located at one end of the inlet pipe, and the cyclone blades are located at the end of the inlet pipe near the inlet. The outlet pipe is connected to the other end of the inlet pipe, and a dust outlet is formed between the inlet pipe and the outlet pipe. The dust outlet is located between the outlet and the inlet.

[0012] Furthermore, the housing includes an outer shell, and a front support plate and a rear support plate arranged opposite each other. The air intake pipe is arranged on the front support plate, the air outlet pipe is arranged on the rear support plate, and the outer shell is fitted onto the front support plate and the rear support plate.

[0013] Furthermore, the end of the dust exhaust pipe near the dust chamber is integrally formed with the rear support plate; and / or, the air outlet pipe is integrally formed with the rear support plate; and / or, the outer shell, the air inlet pipe, and the front support plate are integrally formed.

[0014] Furthermore, the housing has a first bottom wall positioned relative to the ground, and the housing also includes an extension portion extending from the side of the outer shell near the front support plate toward the air intake. The extension portion includes a second bottom wall connected to the first bottom wall, and a perforated structure is formed on the second bottom wall.

[0015] Furthermore, the extension section also includes a first sidewall and a second sidewall disposed opposite to each other on the second bottom wall, the length of the first sidewall and the length of the second sidewall both gradually decreasing from the end closer to the second bottom wall to the end farther away from the second bottom wall; and / or, it also includes a mounting section disposed on the first sidewall and the second sidewall.

[0016] The air pre-filter of this invention has the following advantages:

[0017] 1. By setting the axis of the dust discharge pipe in the air pre-filter parallel to the axis of the cyclone tube, the movement path of dust before and after passing through the dust chamber is kept in the same direction. The dust discharge pipe can better match the airflow direction in the cyclone tube, which helps the dust to be discharged faster and reduces the accumulation in the dust chamber, thereby improving filtration efficiency and accuracy.

[0018] 2. The reduced local resistance experienced by dust within the air pre-filter helps maintain the system's high efficiency, ensures smooth airflow along the dust's movement path, and improves the overall efficiency of the filtration system.

[0019] 3. The outer shell, front support plate and rear support plate in the air pre-filter are sealed and connected to form a dust chamber. The side of the outer shell near the rear support plate is connected to the cover of the air collection hood. The dust discharge pipe is inserted into the sleeve of the air collection hood, so that the shell, air collection hood, cyclone assembly and dust discharge pipe form a modular whole structure with stable structure, good airtightness and high integration. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the air pre-filter of this utility model.

[0021] Figure 2 This is an exploded view of the air pre-filter of this utility model.

[0022] Figure 3 This is a plan view of the front side of the air pre-filter of this utility model.

[0023] Figure 4 for Figure 3 A sectional view cut along line segment A.

[0024] Figure 5 This is a plan view of the rear side of the air pre-filter of this utility model.

[0025] Figure 6 for Figure 5 A sectional view cut along line segment B.

[0026] Figure 7 This is a three-dimensional schematic diagram of the front side of the air pre-filter of this utility model.

[0027] Figure 8 This is a cross-sectional view of another embodiment of the air pre-filter of this utility model. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this utility model, the air pre-filter of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 4As shown, the air pre-filter includes a housing 100, an air collection hood 200, a cyclone assembly 300, and a dust discharge pipe 400. The cyclone assembly 300 includes multiple cyclone tubes arranged side by side. Each cyclone tube includes an inlet pipe 301, an outlet pipe 302, and cyclone blades 303. One end of the inlet pipe 301 has an inlet port 306, which is directly connected to the outside air and is used to draw in the air to be purified. The cyclone blades 303 are arranged inside the end of the inlet pipe 301 near the inlet port 306. The outlet pipe 302 is sleeved inside the other end of the inlet pipe 301, that is, the diameter of the outlet pipe 302 near the inlet pipe 301 is smaller than that of the inlet pipe 301. The diameter of the air pipe 301 is such that one end of the air outlet pipe 302 extends into the interior of the air inlet pipe 301 to form a sleeve, thereby forming an annular dust outlet 304 between the air inlet pipe 301 and the air outlet pipe 302. The end of the air outlet pipe 302 away from the dust outlet 304 forms an air outlet 305. The air collection hood 200 includes a hood body 201, which includes a first port 203 and a second port 204. The first port 203 is connected to the air outlet 305, and the axis of the second port 204 is arranged parallel to the axis of the air outlet 305 to increase the gas flow rate in and out of the hood body 201 and enhance the intake volume per unit time.

[0030] like Figures 4 to 6 As shown, the housing 100 is disposed outside the cyclone assembly 300, and a dust chamber 500 is formed inside the housing 100. The dust outlet 304 is connected to the dust chamber 500, and the dust discharge pipe 400 is connected to the other side of the dust chamber 500 away from the air inlet 306, and both are connected to the dust chamber 500. When the swirl vane 303 rotates, the dust entering the intake pipe 301 is separated to a position close to the pipe wall of the intake pipe 301, and flows along the inner side of the pipe wall of the intake pipe 301 to the dust outlet 304 and is discharged into the dust chamber 500. The end of the dust discharge pipe away from the dust chamber 500 is connected to the automatic dust discharge assembly. The automatic dust discharge assembly continuously supplies air to the outside, and the dust in the dust chamber 500 is discharged to the external environment through the dust discharge pipe 400. The separated clean air moves close to the axis of the intake pipe 301, enters the exhaust pipe 302 and is discharged from the exhaust port 305 into the air collection hood 200 connected to one end of the housing 100, and is then sucked into the next stage filter device or into the engine along the air collection hood 200.

[0031] It is understandable that the automatic dust removal component can adopt existing technologies such as dust removal fans and suction generators. Those skilled in the art can choose according to the actual situation, as long as it can continuously suck the dust out of the dust chamber 500 and prevent the dust from being sucked back into the air inlet pipe 301.

[0032] It is particularly important to emphasize that the axis of the dust discharge pipe 400 is parallel to the axis of the cyclone tube. This parallel arrangement in this invention includes both completely parallel lines and lines parallel at a slight angle. The purpose of this parallel arrangement is twofold: firstly, the dust discharge pipe 400 ensures that the dust flows in the same direction before and after passing through the dust chamber 500. The dust discharge pipe 400 can better match the airflow direction within the cyclone tube, facilitating faster dust discharge and reducing accumulation within the dust chamber 500, thereby improving filtration efficiency and accuracy. Secondly, compared to an angled arrangement, the parallel arrangement reduces local resistance caused by changes in dust direction, which helps maintain efficient system operation, ensuring smooth airflow along the dust movement path and improving the overall efficiency of the filtration system. Furthermore, the parallel arrangement helps to utilize space more effectively, avoiding the need for additional space to accommodate the dust discharge pipe 400 and other structures such as the automatic dust removal components required by an angled arrangement.

[0033] Furthermore, the axis of the shroud 201 is parallel to the axis of the dust exhaust pipe 400. This design serves two purposes: firstly, it ensures a smoother flow path for clean air from the swirl tube to the shroud 201 and then into the engine, reducing pressure loss and turbulence caused by sudden changes in direction, minimizing unnecessary energy loss, maintaining high intake efficiency, ensuring the engine receives sufficient clean air, and improving the efficiency of the filtration system. Secondly, it helps to utilize space more effectively, avoiding additional space requirements caused by the angular differences between the shroud 201, the dust exhaust pipe 400, and the swirl tube, minimizing the space occupied by the entire air pre-filter, and improving the integration, miniaturization, and modularity of the air pre-filter.

[0034] like Figure 4 and Figure 5 As shown, the housing 100 includes an outer shell 104, which includes a first bottom wall 101 located near the ground. It should be noted that when the air pre-filter of this utility model is installed on power machinery, it is generally set with the axis of the cyclone tube parallel to the ground. Therefore, the cyclone tube is set on the side of the first bottom wall 101 facing away from the ground, and the dust discharge pipe 400 is set close to the first bottom wall 101. This is equivalent to sucking dust from the side of the dust chamber 500 near the ground, improving dust discharge efficiency and preventing dust from accumulating in the dust chamber 500. Furthermore, the dust discharge pipe 400 is set at one end close to the first bottom wall 101, that is, at a corner of the square column housing 104. This keeps the air intake path of the air pre-filter in a central position, improving air intake efficiency. At the same time, it facilitates the centralized arrangement of the air collection hood 200 and the cyclone assembly 300, improving the space utilization of the overall structure and making it easy to manufacture.

[0035] Furthermore, such as Figure 1 and Figure 2 As shown, the air collection hood 200 also includes a sleeve 202 disposed outside the hood body 201. The first port 203 of the hood body 201 is connected to the outer shell 104. The diameter of the sleeve 202 is slightly larger than the diameter of the dust discharge pipe 400. Thus, the sleeve 202 is sleeved on the outside of the dust discharge pipe 400, so that the dust discharge pipe 400 and the air collection hood 200 are fixedly disposed, which enhances the stability of the dust discharge pipe structure and the overall structure of the air pre-filter and reduces the maintenance frequency.

[0036] The housing 100 also includes a front support plate 102 and a rear support plate 103 disposed opposite to each other. An air inlet pipe 301 is disposed on the front support plate 102, and an air outlet pipe 302 is disposed on the rear support plate 103. A housing 104 is fitted onto the front support plate 102 and the rear support plate 103. Preferably, both ends of the air inlet pipe 301 are located on both sides of the front support plate 102, and the housing 104 is fitted onto the outer edge of the front support plate 102. The housing 104, the air inlet pipe 301, and the front support plate 102 are integrally formed. One end of the dust exhaust pipe 400 near the dust chamber 500 is connected to one side of the rear support plate 103 and is integrally formed. The air outlet 305 of the air outlet pipe 302 is connected to the other side of the rear support plate 103 and is integrally formed. The rear support plate 103 is opposite to the front support plate 102. The dust chamber 500 is formed by sealing and connecting the outer shell 104, the front support plate 102, and the rear support plate 103. The side of the outer shell 104 near the rear support plate 103 is connected to the cover 201 of the air collection hood 200 and fixed with bolts. The dust discharge pipe 400 is inserted into the sleeve 202 of the air collection hood 200, so that the outer shell 100, the air collection hood 200, the swirling assembly 300, and the dust discharge pipe 400 form a modular overall structure with stable structure, good airtightness, and high integration.

[0037] Preferred, such as Figure 4 and 7 As shown, the housing 100 also includes an extension 105, which extends from the side of the housing 104 near the front support plate 102 toward the air inlet 306. A mounting part 106 can be provided on the outside of the extension 105 for fixed connection between the air prefilter and other structures of the power machinery. It can be understood that the mounting part 106 is located on the extension 105, which is equivalent to being located away from the center of the overall structure of the air prefilter. This can enhance the stability of the connection between the air prefilter and other structures and facilitate maintenance and installation.

[0038] The extension section 105 includes a second bottom wall 107, which is connected to the first bottom wall 101. Multiple horizontally arranged strip-shaped perforated structures 108 are formed on the second bottom wall 107. It can also be set as a circular, grid-like or other structure, so that dust or rainwater and other impurities falling on the second bottom wall 107 can continue to fall to the outside of the air pre-filter, avoiding their accumulation on the second bottom wall 107 and causing blockage of the air inlet 306, or being drawn into the air inlet 306 to increase the filtration volume.

[0039] like Figure 2 As shown, the extension section 105 also includes a first side wall 109 and a second side wall 110 disposed opposite to the second bottom wall 107. The length of the first side wall 109 and the length of the second side wall 110 gradually decrease from the end near the second bottom wall 107 to the end away from the second bottom wall 107, so as to increase the lateral air intake near the air intake 306 and ensure the normal and stable operation of the engine.

[0040] It is understandable that, such as Figure 8 As shown, the second port 224 of the cover 221 is located away from the dust exhaust pipe 420. In this embodiment, the second port 224 of the cover 221 is gradually moved away from the dust exhaust pipe 420 relative to the first port 223, thereby forming a gap space 225 between the cover 221 and the dust exhaust pipe 420 to avoid other structures at the air pre-filter installation position and to make the cover 221 biased towards the engine direction, so that the air pre-filter is easy to install and maintain, while improving the intake efficiency.

[0041] The air pre-filter of this invention has the following advantages:

[0042] 1. By setting the axis of the dust discharge pipe in the air pre-filter parallel to the axis of the cyclone tube, the movement path of dust before and after passing through the dust chamber is kept in the same direction. The dust discharge pipe can better match the airflow direction in the cyclone tube, which helps the dust to be discharged faster and reduces the accumulation in the dust chamber, thereby improving filtration efficiency and accuracy.

[0043] 2. The reduced local resistance experienced by dust within the air pre-filter helps maintain the system's high efficiency, ensures smooth airflow along the dust's movement path, and improves the overall efficiency of the filtration system.

[0044] 3. The outer shell, front support plate and rear support plate in the air pre-filter are sealed and connected to form a dust chamber. The side of the outer shell near the rear support plate is connected to the cover of the air collection hood. The dust discharge pipe is inserted into the sleeve of the air collection hood, so that the shell, air collection hood, cyclone assembly and dust discharge pipe form a modular whole structure with stable structure, good airtightness and high integration.

[0045] The terms “above,” “below,” and “within” as used above include the number itself; the terms “exceeding” and “excluding” do not include the number itself.

[0046] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0047] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. An air pre-filter, characterized in that, The device includes a housing, a swirling assembly, and a dust discharge pipe. A dust chamber is formed inside the housing. The swirling assembly includes multiple swirling tubes arranged side by side. Each swirling tube has a corresponding air inlet and dust outlet. The air inlet is connected to the external environment, and the dust outlet is connected to the dust chamber. The dust discharge pipe is located on the side of the dust chamber away from the air inlet. The axis of the dust discharge pipe is parallel to the axis of the swirling tubes to accelerate the movement speed of the dust.

2. The air pre-filter as described in claim 1, characterized in that, It also includes a cover, which includes a first port and a second port. The cyclone tube also includes an air outlet, which is located on the side of the dust outlet away from the air inlet. The first port is connected to the air outlet, and the axis of the second port is set parallel to the axis of the air outlet.

3. The air pre-filter as described in claim 2, characterized in that, The second port of the cover is positioned away from the dust exhaust pipe to create a gap between the cover and the dust exhaust pipe.

4. The air pre-filter as described in claim 2, characterized in that, It also includes a sleeve installed on the cover, which is connected to the dust exhaust pipe.

5. The air pre-filter as described in any one of claims 1 to 4, characterized in that, The housing has a first bottom wall positioned relative to the ground, and a dust exhaust pipe is positioned near one end of the first bottom wall.

6. The air pre-filter as claimed in any one of claims 2 to 4, characterized in that, The cyclone tube includes an inlet pipe, an outlet pipe, and cyclone blades. The inlet is located at one end of the inlet pipe, and the cyclone blades are located at the end of the inlet pipe near the inlet. The outlet pipe is connected to the other end of the inlet pipe, and a dust outlet is formed between the inlet pipe and the outlet pipe. The dust outlet is located between the outlet and the inlet.

7. The air pre-filter as claimed in claim 6, characterized in that, The housing includes an outer shell, a front support plate and a rear support plate arranged opposite each other, an air intake pipe is arranged on the front support plate, an air outlet pipe is arranged on the rear support plate, and the outer shell is fitted onto the front support plate and the rear support plate.

8. The air pre-filter as claimed in claim 7, characterized in that, The end of the dust exhaust pipe near the dust chamber is integrally formed with the rear support plate; and / or, the air outlet pipe is integrally formed with the rear support plate; and / or, the outer shell, the air inlet pipe, and the front support plate are integrally formed.

9. The air pre-filter as claimed in claim 7, characterized in that, The housing has a first bottom wall positioned relative to the ground. The housing also includes an extension portion that extends from the side of the outer shell near the front support plate toward the air intake. The extension portion includes a second bottom wall that is connected to the first bottom wall, and a perforated structure is formed on the second bottom wall.

10. The air pre-filter as claimed in claim 9, characterized in that, The extension section also includes a first sidewall and a second sidewall disposed opposite to each other on the second bottom wall, the length of the first sidewall and the length of the second sidewall both gradually decreasing from the end closer to the second bottom wall to the end farther away from the second bottom wall; and / or, it also includes a mounting section disposed on the first sidewall and the second sidewall.

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