Air filter for engine and vehicle

Abstract

The air filter comprises a filtering unit and an impurity separation unit, a filtering cavity is formed in the filtering unit, an air outlet and an air inlet which communicate with the filtering cavity are formed in the outer surface of the filtering unit, a filter element is arranged in the filtering cavity, and the air outlet and the air inlet are separated through the filter element; the impurity separation unit is internally provided with an annular rotational flow cavity, the outer surface of the impurity separation unit is provided with an air inlet pipe communicating with the rotational flow cavity, and the air inlet pipe is arranged in the tangential direction of the rotational flow cavity and used for guiding airflow to enter the rotational flow cavity in the tangential direction; an exhaust pipe is arranged in the rotational flow cavity, the air inlet end of the exhaust pipe is located in the rotational flow cavity, and the air outlet end of the exhaust pipe extends out of the rotational flow cavity and is externally connected with an air inlet. According to the utility model, primary filtration of inlet air is realized through the impurity separation unit, and then secondary filtration is carried out on the inlet air through the filtering unit, so that a large amount of impurities can be prevented from being deposited or attached near the filter element, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle parts, and in particular to an air filter for an engine and a vehicle. Background Art

[0002] The air filter is an important part of the intake manifold, which can filter dust in the engine intake and maintain the stability of intake combustion. However, when there is a lot of dust in the intake, especially in the winter snowy scene, when the vehicle is driving on a snowy road, the snowflakes raised by the vehicle in front and the natural wind are sucked into the air filter with the airflow, and then deposited inside the air filter and attached to the filter element under the obstruction of the filter element, which will cause the air filter to be seriously blocked, causing the intake resistance to increase sharply.

[0003] In order to solve the above-mentioned problems, the prior art provides a dust exhaust channel at the bottom of the air filter to discharge some of the accumulated impurities. However, some impurities such as snowflakes will still adhere to the filter element, blocking the air inlet holes of the filter element and affecting the air intake performance. Moreover, as the engine load and the negative pressure of the intake air increase, the impurities such as snowflakes attached to the filter element may even damage the filter element and then enter the engine, causing serious consequences of engine damage. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides an air filter for an engine and a vehicle, which can separate impurities entrained in the intake air and prevent the impurities from being deposited or attached in large quantities near the filter element.

[0005] According to one aspect of an embodiment of the present application, an air filter for an engine is provided, comprising: a filter unit, a filter chamber is arranged inside the filter unit, an outer surface of the filter unit is provided with an air outlet and an air inlet connected to the filter chamber, and a filter element is arranged in the filter chamber, and the air outlet and the air inlet are separated by the filter element; and an impurity separation unit, a cyclone chamber arranged in an annular shape is arranged inside the impurity separation unit, an air inlet pipe connected to the cyclone chamber is arranged on the outer surface of the impurity separation unit, and the air inlet pipe is arranged tangentially to the cyclone chamber for guiding the airflow to enter the cyclone chamber along the tangential direction; an exhaust pipe is arranged in the cyclone chamber, the air inlet end of the exhaust pipe is located in the cyclone chamber, and the air outlet end of the exhaust pipe extends out of the cyclone chamber and is externally connected to the air inlet.

[0006] In an exemplary embodiment of the present application, there is also a dust collecting chamber in an inverted cone shape inside the impurity separation unit. The dust collecting chamber is located below the cyclone chamber and is connected to the cyclone chamber.

[0007] In an exemplary embodiment of the present application, a sewage outlet is also provided at the bottom of the impurity separation unit, and the sewage outlet is connected to the dust collecting chamber, and a valve assembly is provided corresponding to the sewage outlet. The valve assembly has an open position and a closed position relative to the impurity separation unit. When the valve assembly is in the open position, the sewage outlet is opened, and when the valve assembly is in the closed position, the sewage outlet is closed.

[0008] In an exemplary embodiment of the present application, the valve assembly includes a cover plate and a retractable elastic element, one side of the cover plate is hinged to the impurity separation unit, and the other side is connected to the impurity separation unit through the elastic element, and the elastic element is configured to provide prestress between the cover plate and the impurity separation unit so that the cover plate closes the sewage outlet.

[0009] In an exemplary embodiment of the present application, a sewage pipe is further provided at the bottom of the impurity separation unit. The sewage pipe is extended vertically downward and is connected to the dust collecting chamber, and the sewage outlet is opened at the bottom of the sewage pipe.

[0010] In an exemplary embodiment of the present application, at least one section of the wall of the exhaust pipe is configured as a corrugated section, and / or the inner surface of at least one section of the wall of the exhaust pipe is provided with a fiber layer.

[0011] In an exemplary embodiment of the present application, a guide plate is further provided in the cyclone chamber, and the guide plate is spirally extended downward along the inner wall of the impurity separation unit, and the upper end of the guide plate is vertically arranged at a height higher than or flush with the air inlet pipe.

[0012] In an exemplary embodiment of the present application, the filter element is arranged horizontally so that the air inlet and the air outlet are respectively separated at the upper side and the lower side of the filter element.

[0013] In an exemplary embodiment of the present application, at least two impurity separation units are provided, at least two impurity separation units are connected in sequence, and the last impurity separation unit is connected to the filter unit; wherein, when two adjacent units are both impurity separation units, the exhaust pipe of the previous impurity separation unit is externally connected to the intake pipe of the next impurity separation unit; when two adjacent units are an impurity separation unit and a filter unit, the exhaust pipe of the impurity separation unit is externally connected to the air inlet of the filter unit.

[0014] According to a second aspect of an embodiment of the present application, a vehicle is provided, comprising any one of the above-mentioned air filters for an engine.

[0015] The air filter of the present application is realized by setting the filter unit and the impurity separation unit in separate chambers, and then passing through the annular cyclone chamber of the impurity separation unit and the tangentially arranged intake pipe, so that the incoming gas rotates along the annular side wall of the cyclone chamber, and uses centrifugal force and gravity to perform gas-solid separation to achieve primary filtration of the intake air, thereby reducing the impurity content in the intake air and preventing impurities from being deposited or attached in large quantities near the filter element; then the once filtered gas is introduced into the filter unit through the exhaust pipe, and the filter element is used to perform secondary filtration on the intake air to provide clean air to the engine. The overall structure is simple, the filtering effect is good and the filtering efficiency is high.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in 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 application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of an air filter for an engine according to an embodiment of the present application is shown;

[0019] Figure 2 A top sectional view of an air filter for an engine according to an embodiment of the present application is shown;

[0020] Figure 3 A cross-sectional connection diagram of adjacent impurity separation units described in an embodiment of the present application is shown.

[0021] Description of Figure Numbers:

[0022] 1- filtration unit, 11- filtration chamber, 12- air inlet, 13- air outlet, 14- filter element,

[0023] 2-impurity separation unit, 21-cyclone chamber, 211-guide plate, 22-inlet pipe, 23-exhaust pipe, 231-corrugated section, 232-fiber layer, 24-dust collecting chamber, 25-drain port, 26-valve assembly, 261-cover plate, 262-elastic element, 27-drain pipe.

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0026] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0028] like Figures 1 to 3As shown, this embodiment provides an air filter for an engine, including a filter unit 1 and an impurity separation unit 2, wherein a filter chamber 11 is arranged inside the filter unit 1, and an air outlet 13 and an air inlet 12 connected to the filter chamber 11 are arranged on the outer surface of the filter unit 1, and a filter element 14 is arranged inside the filter chamber 11, and the air outlet 13 and the air inlet 12 are separated by the filter element 14; and a swirl chamber 21 arranged in an annular shape is arranged inside the impurity separation unit 2, and an air inlet pipe 22 connected to the swirl chamber 21 is arranged on the outer surface of the impurity separation unit 2, and the air inlet pipe 22 is arranged along the tangent direction of the swirl chamber 21 for guiding the airflow to enter the swirl chamber 21 along the tangent direction; an exhaust pipe 23 is arranged in the swirl chamber 21, and the air inlet end of the exhaust pipe 23 is arranged in the swirl chamber 21, preferably arranged in the center, and the air outlet end of the exhaust pipe 23 extends out of the swirl chamber 21 and is connected to the air inlet 12 externally. In this way, the gas carrying impurities such as snowflakes and dust enters the cyclone chamber 21 from the air inlet pipe 22, and is guided by the air inlet pipe 22 to rotate along the annular side wall of the cyclone chamber 21. The impurities in the gas are separated from the gas due to their own gravity and the centrifugal force generated by the rotation, thereby realizing gas-solid separation and completing the primary filtration of the gas. The impurity content of the gas after the primary filtration is significantly reduced; then, the gas that has passed the primary filtration flows to the filter unit 1 through the exhaust pipe 23, enters the filter chamber 11 through the air inlet 12 and completes the secondary filtration of the gas through the filter element 14. The clean gas after the secondary filtration can be discharged through the air outlet 13, which not only has a good filtration effect but also has a high filtration efficiency. At the same time, it can prevent impurities from being deposited or attached in large quantities near the filter element 14, thereby increasing the service life of the filter element 14.

[0029] It can be understood that the number of impurity separation units 2 is at least one: when there is one impurity separation unit 2, the impurity separation unit 2 can be connected to the air inlet 12 of the filter unit 1 through the exhaust pipe 23 to achieve gas circulation; when there are two or more impurity separation units 2, several impurity separation units 2 are connected in sequence, and the last impurity separation unit 2 is connected to the filter unit 1; wherein, when two adjacently connected units are both impurity separation units 2, the exhaust pipe of the previous impurity separation unit is externally connected to the air inlet pipe of the next impurity separation unit; when the two adjacently connected units are the impurity separation unit 2 and the filter unit 1, the exhaust pipe 23 of the impurity separation unit 2 is externally connected to the air inlet 12 of the filter unit 1. Multiple impurity separation units 2 can achieve multi-stage filtration of the gas, further improving the filtering effect of the gas.

[0030] For example, Figures 1 to 3As shown, in the present embodiment, three impurity separation units 2 are provided, wherein the exhaust pipe 23" of the first impurity separation unit 2" is externally connected to the intake pipe 22' of the second impurity separation unit 2', the exhaust pipe 23' of the second impurity separation unit 2' is externally connected to the intake pipe 22 of the third impurity separation unit 2, and the exhaust pipe 23 of the third impurity separation unit 2 is externally connected to the air inlet 12 of the filter unit 1. In this way, after the gas enters from the intake pipe 22" of the first impurity separation unit 2", it can pass through the three impurity separation units 2" / 2' / 2 in sequence to achieve three filtrations, and then enter the filter unit 1 for final filtration through the filter element 14, which effectively prolongs the time the gas passes through the impurity separation unit part and improves the filtering effect.

[0031] Preferably, if Figure 1 As shown, the vertical height of the air inlet end of the exhaust pipe 23 can be set to be lower than or flush with the air inlet pipe 22. In this way, it can be avoided that the gas entering from the air inlet pipe 22 is directly sucked into the exhaust pipe 23, thereby affecting the filtering effect of the impurity separation unit 2.

[0032] Preferably, if Figure 1 As shown, the outlet end of the exhaust pipe 23 can be extended from the side wall of the impurity separation unit 2 to directly connect with the intake pipe 22 of the next impurity separation unit 2 or the intake port 12 of the next filter unit 1 in the side wall direction, thereby improving the structural compactness of the air filter.

[0033] Furthermore, since the gas needs to flow along the side wall when entering the cyclone chamber 21 from the inlet pipe 22, the vertical height of the outlet end of the exhaust pipe 23 of the impurity separation unit 2 can be higher than the height of the inlet pipe 22 of the impurity separation unit 2 to avoid interfering with the gas rotation. Since the exhaust pipe 23 of the previous impurity separation unit 2 is directly connected to the inlet pipe 22 of the next filter unit 1, the exhaust pipe 23 of the previous impurity separation unit 2 and the inlet pipe 22 of the next filter unit 1 are at the same vertical height, so, if Figure 1 and Figure 3 As shown, the height of the exhaust pipe outlet end of each stage of the impurity separation unit increases vertically to avoid interfering with gas rotation.

[0034] In some embodiments, Figure 1As shown, there is also a dust collecting chamber 24 in an inverted cone shape inside the impurity separation unit 2. The dust collecting chamber 24 is located below the cyclone chamber 21 and is connected to the cyclone chamber 21. Preferably, the top of the dust collecting chamber 24 is adapted to the bottom size of the cyclone chamber 21, so that the airflow can smoothly enter the dust collecting chamber 24 from the cyclone chamber 21. Through the setting of the dust collecting chamber 24, on the one hand, the descending outer cyclone airflow can be introduced to the center to form an upward inner cyclone airflow to improve the air intake efficiency; on the other hand, the separated impurities can be collected downward at the inverted cone bottom of the dust collecting chamber 24, so as to facilitate the centralized treatment of the impurities.

[0035] In some embodiments, Figure 1 and Figure 3 As shown, a sewage outlet 25 is further provided at the bottom of the impurity separation unit 2, and the sewage outlet 25 is communicated with the dust collecting chamber 24, and a valve assembly 26 is correspondingly provided at the sewage outlet 25. The valve assembly 26 has an open position and a closed position relative to the impurity separation unit 2. When the valve assembly 26 is in the open position, the sewage outlet 25 is opened, so that impurities accumulated at the bottom of the dust collecting chamber 24 can be discharged from the sewage outlet 25; when the valve assembly 26 is in the closed position, the sewage outlet 25 is closed to prevent air leakage from affecting the separation efficiency.

[0036] For example, Figure 1 and Figure 3 As shown, the valve assembly 26 includes a cover plate 261 and a retractable elastic element 262. The elastic element 262 can be a return spring. One side of the cover plate 261 is hinged to the impurity separation unit 2 so that the cover plate 261 can be opened and closed relative to the sewage outlet 25. The other side of the cover plate 261 is connected to the impurity separation unit 2 through the elastic element 262, and the elastic element 262 is configured to provide prestress between the cover plate 261 and the impurity separation unit 2 so that the cover plate 261 closes the sewage outlet 25. After the impurity separation unit 2 performs gas-solid separation on the air, the impurities accumulate at the sewage outlet 25 and are blocked by the cover plate 261. When the impurities accumulate to a certain extent, that is, the gravity of the accumulated impurities is greater than the elastic force of the elastic element 262, the elastic element 262 is stretched to switch the cover plate 261 from the closed position to the open position, thereby opening the sewage outlet 25 to discharge the impurities; when a certain amount of impurities are discharged, that is, the gravity of the accumulated impurities is less than the elastic force of the elastic element 262, the elastic element 262 recovers the deformation to switch the cover plate 261 from the open position to the closed position, thereby closing the sewage outlet 25. In this way, the automatic control of the staged opening of the sewage outlet 25 can be realized, which can not only block the leakage of airflow, but also does not affect the separation efficiency.

[0037] It is understandable that, in other embodiments, the valve assembly 26 may also adopt a structure such as a solenoid valve to achieve staged opening control of the sewage outlet 25 .

[0038] In some embodiments, Figure 1As shown, a sewage pipe 27 is further provided at the bottom of the impurity separation unit 2, and the sewage pipe 27 extends vertically downward and is connected to the dust collecting chamber 24, and a sewage outlet 25 is provided at the bottom of the sewage pipe 27. By providing the sewage pipe 27, impurities can be contained through the sewage pipe 27, the impurity content in the dust collecting chamber 24 can be reduced, and the probability of the inner vortex airflow carrying the bottom impurities can be reduced.

[0039] In some embodiments, Figure 1 As shown, at least one section of the wall of the exhaust pipe 23 is configured as a corrugated section 231, and / or the inner surface of at least one section of the wall of the exhaust pipe 23 is provided with a fiber layer 232. The fiber layer 232 can be provided by attaching felt or fiber cotton to the inner surface of the exhaust pipe 23. By providing the corrugated section 231 and / or the fiber layer 232, the impurity interception rate and the silencing effect of the exhaust pipe 23 can be improved.

[0040] In some embodiments, Figure 1 and Figure 2 As shown, a guide plate 211 is further provided in the cyclone chamber 21, and the guide plate 211 is spirally extended downward along the inner wall of the impurity separation unit 2, and the upper end of the guide plate 211 is vertically arranged at a height higher than or flush with the air inlet pipe 22. By setting the guide plate 211, the airflow entering the air inlet pipe 22 can be guided downward, thereby improving the separation efficiency.

[0041] In some embodiments, Figure 1 As shown, the filter element 14 is arranged horizontally so that the air inlet 12 and the air outlet 13 are respectively separated at the upper and lower sides of the filter element 14. In this way, the air inlet 12 can avoid direct collision with the filter element 14 when the air flow enters the filter chamber 11 from the air inlet 12, thereby reducing damage to the filter element 14.

[0042] For example, in this embodiment, the air inlet 12 is arranged on the side wall of the filter unit 1, so as to directly connect with the exhaust pipe 23 of the last impurity separation unit 2 in the direction of the side wall, thereby improving the compactness of the structure of the air filter; at the same time, when the airflow enters the filter chamber 11 from the air inlet 12, it can spread over the upper part of the filter chamber 11 to fully contact with the filter element 14. This can improve the filtering effect and reduce the damage to the filter element 14, thereby increasing the service life of the filter element 14.

[0043] In addition, in another embodiment, a vehicle is provided, including the air filter for an engine of the above embodiment. For other structures and working principles of the air filter for an engine, please refer to the above description of the embodiment of the air filter for an engine. Since the air filter for an engine has the above technical effects, the vehicle having the air filter for an engine should also have the corresponding technical effects, which will not be described in detail here.

[0044] It is understood that in this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined. And the description of the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0046] The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradicting each other.

[0047] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. An air filter for an engine, characterized in that: include: A filter unit, wherein a filter chamber is disposed inside the filter unit, an air outlet and an air inlet communicated with the filter chamber are disposed on the outer surface of the filter unit, and a filter element is disposed inside the filter chamber, and the air outlet and the air inlet are separated by the filter element; and An impurity separation unit, wherein a cyclone chamber arranged in an annular shape is provided inside the impurity separation unit, an air inlet pipe connected to the cyclone chamber is provided on the outer surface of the impurity separation unit, and the air inlet pipe is arranged along the tangent direction of the cyclone chamber to guide the airflow to enter the cyclone chamber along the tangent direction; an exhaust pipe is provided in the cyclone chamber, an air inlet end of the exhaust pipe is located in the cyclone chamber, and an air outlet end of the exhaust pipe extends out of the cyclone chamber and is externally connected to the air inlet.

2. The air filter for an engine according to claim 1, characterized in that: The impurity separation unit also has a dust collecting chamber arranged in an inverted cone shape. The dust collecting chamber is located below the cyclone chamber and is communicated with the cyclone chamber.

3. The air filter for an engine according to claim 2, characterized in that: A sewage outlet is also provided at the bottom of the impurity separation unit, and the sewage outlet is communicated with the dust collecting chamber, and a valve assembly is correspondingly provided at the sewage outlet. The valve assembly has an open position and a closed position relative to the impurity separation unit. When the valve assembly is in the open position, the sewage outlet is opened, and when the valve assembly is in the closed position, the sewage outlet is closed.

4. The air filter for an engine according to claim 3, characterized in that: The valve assembly includes a cover plate and a retractable elastic element, one side of the cover plate is hinged to the impurity separation unit, and the other side is connected to the impurity separation unit through the elastic element, and the elastic element is configured to provide prestress between the cover plate and the impurity separation unit so that the cover plate closes the sewage outlet.

5. The air filter for an engine according to claim 3, characterized in that: A sewage pipe is also provided at the bottom of the impurity separation unit. The sewage pipe is vertically extended downward and communicated with the dust collecting chamber. The sewage outlet is opened at the bottom of the sewage pipe.

6. The air filter for an engine according to claim 1, characterized in that: At least one section of the wall of the exhaust pipe is configured as a corrugated section, and / or the inner surface of at least one section of the wall of the exhaust pipe is provided with a fiber layer.

7. The air filter for an engine according to claim 1, characterized in that: The cyclone chamber is also provided with a guide plate, which is spirally extended downward along the inner wall of the impurity separation unit, and the upper end of the guide plate is vertically arranged at a height higher than or flush with the air inlet pipe.

8. The air filter for an engine according to claim 1, characterized in that: The filter element is arranged horizontally so that the air inlet and the air outlet are respectively arranged at the upper side and the lower side of the filter element.

9. The air filter for an engine according to any one of claims 1 to 8, characterized in that: At least two impurity separation units are provided, at least two impurity separation units are connected in sequence, and the last impurity separation unit is connected to the filtering unit; wherein, When two adjacent units are both impurity separation units, the exhaust pipe of the preceding impurity separation unit is externally connected to the intake pipe of the following impurity separation unit; When the two adjacent units are the impurity separation unit and the filtering unit, the exhaust pipe of the impurity separation unit is externally connected to the air inlet of the filtering unit.

10. A vehicle, characterized in that: The invention comprises an air filter for an engine as claimed in any one of claims 1 to 9.

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