Unit air filter assembly

Abstract

The utility model relates to an air filter, in particular to a unit air filter assembly. Comprising a filter element and an air filter shell capable of wrapping the filter element. The air filter shell is provided with an air inlet and a first air outlet connected with an air inlet of an engine. The filter element is located between the air inlet and the first air outlet, and a filter element support is arranged between the filter element and the first air outlet. The shape of the filter element and the shape of the filter element support are matched with the shape of the cross section of the air filter shell. The filter element support comprises a protection part and a ventilation part, and the protection part corresponds to the first air outlet. External air sequentially passes through the air inlet, the filter element, the ventilation part of the filter element support and the first air outlet to enter the air inlet of the engine. According to the scheme, the unit air filter assembly can be directly connected with the engine, the unit air filter assembly can be matched with the engine in size, the space utilization rate is high, and the installation structure is compact.

Description

Technical Field

[0001] The utility model relates to an air filter, in particular to a unit air filter assembly. Background Art

[0002] The air filter, also known as the air cleaner, is connected to the engine intake pipe and is the first checkpoint of the engine. Since the diesel engine needs to inhale a large amount of air during operation, if the air is not filtered, the dust suspended in the air will be sucked into the cylinder, which will accelerate the wear of the piston group and the cylinder. It can be seen that the role of the air filter is particularly important. The main components of the air filter are the filter element and the casing. The filter element is the main filtering part, which is responsible for the gas filtering work, and the casing is the external structure that provides necessary protection for the filter element.

[0003] When the engine rotates forward, the outside air passes through the filter element and enters the engine air intake through the engine intake pipe. However, the engine may be reversed during operation. At this time, the engine is in exhaust state, that is, the high-temperature gas inside the engine is ejected through the engine air intake. In order to prevent the high-temperature gas from damaging the filter element and causing the filter element to fail, the existing air filter is large in size and complex in structure, or needs to be connected to the engine through the engine intake pipe, or the gas channel is extended to prevent the high-temperature gas from spraying directly on the filter element.

[0004] At present, in order to meet the needs of the public, reduce the weight of the engine, make the power system structure compact, and adapt to more usage scenarios, it is necessary to reduce the size of the engine, and then the matching air filter also needs to be reduced in size and have fewer connecting accessories. Due to the requirements of its internal structure design, some dimensions of the complex and large air filter cannot be changed, and some space will be wasted after installation. The air filter with a simple structure needs to be connected to the engine intake pipe, which cannot achieve a compact power system structure. Utility Model Content

[0005] The utility model aims to provide a small-volume unit air filter assembly which can be directly connected to an engine. The unit air filter assembly has a simple structure and is easy to install and replace.

[0006] The unit air filter assembly in this scheme includes a filter element and an air filter housing in which the filter element can be coated. The air filter housing is provided with an air inlet and a first air outlet connected to the engine air inlet. The filter element is located between the air inlet and the first air outlet, and a filter element holder is provided between the filter element and the first air outlet. The shape of the filter element and the shape of the filter element holder are adapted to the cross-sectional shape of the air filter housing. The filter element holder includes a protective portion and a breathable portion, and the protective portion corresponds to the first air outlet. External air enters the engine air inlet through the air inlet, the filter element, the breathable portion of the filter element holder, and the first air outlet in sequence. When the engine air inlet is facing upward, the unit air filter assembly is installed above the engine air inlet and is directly connected thereto. Preferably, the air inlet is located above the filter element, and the first air outlet is located below the filter element and is provided at the bottom of the air filter housing.

[0007] The advantages of the utility model are: 1) When the engine is reversed (i.e., in exhaust state), the high-temperature gas is ejected and enters through the first air outlet on the air filter housing, and is directly sprayed onto the protective surface of the filter element bracket, protecting the filter element from damage by the high-temperature gas. 2) The unit air filter assembly is directly connected to the engine, reducing connectors, saving costs and installation space, and reducing the weight of the power system. 3) The internal components of the unit air filter assembly are simple, and the specific size of the air filter housing can be designed according to the remaining space after the engine is installed. The shape of the filter element and the shape of the filter element bracket can be manufactured according to the specific size of the air filter housing, so that the volume of the unit air filter assembly and the engine are compatible, the space utilization rate is high, and the structure is compact. 4) The structure is simple, the installation and replacement are convenient, and the manufacturing cost is low.

[0008] Furthermore, a cavity capable of accommodating gas is formed between the filter element support and the air filter housing. That is, one side of the filter element support is against the filter element, and the other side is at a certain distance from the inner wall of the air filter housing, so that air has a certain flow space, which can improve the air filtration efficiency. Preferably, the air filter housing is provided with a card table or a step surface for supporting the surrounding side of the filter element support.

[0009] Furthermore, one end of the air filter housing is provided with an inwardly recessed limiting portion, and the limiting portion is used to press the filter element against the filter element bracket, thereby fixing the filter element and the filter element bracket at the same time.

[0010] Furthermore, the air inlet is arranged on the side wall of the air filter housing to prevent rainwater from flowing into the air filter housing from above, causing water to enter the filter element, thereby causing the engine to experience poor refueling, dullness and insufficient fuel supply.

[0011] Furthermore, it also includes a reinforcing plate, which is located between the filter element bracket and the first air outlet; the reinforcing plate is provided with a second air outlet adapted to the first air outlet.

[0012] Furthermore, the air filter housing includes a first shell and a second shell, which is convenient for placing or replacing the filter element and the filter element bracket.

[0013] Furthermore, a locking member is further included, and the locking member is used to connect and fix the first shell and the second shell. Preferably, the locking member can be a locking bolt and a locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the air filter assembly of the utility model unit;

[0015] Figure 2 This is a bottom view of the air filter assembly of the utility model unit;

[0016] Figure 3 It is an exploded view of the air filter assembly of the utility model unit;

[0017] Figure 4 This is a schematic diagram of the structure of the first housing in the air filter assembly of the utility model;

[0018] Figure 5 The utility model is a structural diagram of the filter element bracket and the reinforcement plate in the air filter assembly of the unit.

[0019] In the figure, 1 is an air filter housing, 1-1 is a first shell, 1-2 is a second shell, 1-3 is an air inlet, 1-4 is a first air outlet, 1-5 is a limiting portion, 1-6 is a connecting boss, 1-7 is a connecting seat, 1-8 is a limiting groove, 2 is a filter element, 3 is a filter element bracket, 3-1 is a protective portion, 3-2 is a breathable portion, 3-3 is a strip hole, 4 is a reinforcing plate, 4-1 is a second air outlet, 5 is a locking member, 5-1 is a locking bolt, 5-2 is a locking nut, and 6 is a flange. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] according to Figures 1 to 5 As shown, the unit air filter assembly includes a filter element 2 and an air filter housing 1 in which the filter element 2 can be covered. The air filter housing 1 is provided with an air inlet 1-3 and a first air outlet 1-4 connected to the engine air inlet 1-3. The filter element 2 is located between the air inlet 1-3 and the first air outlet 1-4, and a filter element bracket 3 is provided between the filter element 2 and the first air outlet 1-4. The shape of the filter element 2 and the shape of the filter element bracket 3 are both adapted to the cross-sectional shape of the air filter housing 1. The filter element bracket 3 includes a protective portion 3-1 and a breathable portion 3-2, and the protective portion 3-1 corresponds to the first air outlet 1-4.

[0022] External air passes through the air inlet 1-3, the filter element 2, the air permeable portion 3-2 of the filter element bracket 3, and the first air outlet 1-4 in sequence, and enters the engine air inlet 1-3. When the engine air inlet 1-3 faces upward, the air filter assembly of the unit is installed above the engine air inlet 1-3 and is directly connected to it. Preferably, the air inlet 1-3 is located above the filter element 2, and the first air outlet 1-4 is located below the filter element 2 and is arranged at the bottom of the air filter housing 1. Figure 5 As shown, when the engine is reversed (i.e., in exhaust state), the high-temperature gas is ejected along direction A and enters through the first air outlet 1-4 on the air filter housing 1, and is directly sprayed on the surface of the protective portion 3-1 of the filter element bracket 3, protecting the filter element 2 from damage by the high-temperature gas. If the engine air inlet 1-3 is horizontal after the engine is installed, the first air outlet 1-4 can be set on the side wall of the air filter housing 1, that is, the position of the first air outlet 1-4 can be set according to demand or the direction of the engine air inlet 1-3, so as to facilitate adaptation to a variety of engines.

[0023] The internal components of the unit air filter assembly are simple. The specific size of the air filter housing 1 can be designed according to the remaining space after the engine is installed. The shape of the filter element 2 and the shape of the filter element bracket 3 can be manufactured according to the specific size of the air filter housing 1. For example, if the engine air inlet 1-3 is lower than the engine body, such as Figure 1 As shown, the first air outlet 1-4 of the air filter housing 1 can be designed as a boss structure higher than the bottom of the air filter housing 1, without connecting the engine intake pipe, while reducing the number of connectors, saving costs and installation space, and reducing the weight of the power system; if other components need to pass through or be installed between the engine and the unit air filter assembly, the side of the air filter housing 1 close to the engine can be made into a stepped surface, such as Figure 2 As shown, it is easy to make way for other components without affecting the filtering performance of the unit air filter assembly. After the unit air filter assembly of the utility model is installed, the space utilization rate is high, and at the same time, the power system assembly structure is compact and the use scenarios are varied.

[0024] As a further improvement of the utility model, the filter element holder 3 is partially spaced from the bottom of the air filter housing 1, and the filter element holder 3 suspends the filter element 2 in the middle of the air filter housing 1, that is, the filter element holder 3 and the bottom of the air filter housing 1 form a cavity that can accommodate gas. Part of the filtered air can be stored to improve the filtering efficiency. Preferably, the air filter housing 1 is provided with a card table or a step surface for supporting the surrounding side of the filter element holder 3. The air permeable portion 3-2 of the filter element holder 3 is a porous structure, and the hole can be a square, circular, long strip or other through hole. Preferably, the porous structure is a plurality of strip holes 3-3 arranged side by side. In order to ensure the strength of the air permeable portion 3-2, a flange 6 is provided at the strip hole 3-3.

[0025] As a further improvement of the utility model, one end of the air filter housing 1 is provided with an inwardly recessed limiting portion 1-5, and the limiting portion 1-5 is used to press the filter element 2 against the filter element bracket 3, thereby fixing the filter element 2 and the filter element bracket 3 at the same time.

[0026] As a further improvement of the present invention, in order to prevent water from entering the filter element 2, causing poor engine refueling, dullness and insufficient oil supply, the air inlet 1-3 is arranged on the side wall of the air filter housing 1, and one or more of the air inlet 1-3 can be arranged as needed.

[0027] As a further improvement of the utility model, a reinforcing plate 4 is provided between the filter element support 3 and the first air outlet 1-4; the reinforcing plate 4 is provided with a second air outlet 4-1 adapted to the first air outlet 1-4, and the shape and size of the second air outlet 4-1 are the same as those of the first air outlet 1-4. To ensure the strength of the reinforcing plate 4, a flange 6 is provided on the peripheral side of the reinforcing plate 4.

[0028] As a further improvement of the utility model, in order to facilitate opening the air filter housing 1, the filter element 2 and the filter element bracket 3 are placed or replaced. The air filter housing 1 includes a first shell 1-1 and a second shell 1-2. Preferably, the first shell 1-1 is a cover plate structure, and the inwardly recessed limit portion 1-5 is located in the first shell 1-1. The second shell 1-2 is an open cavity structure, and the filter element 2 and the filter element bracket 3 are located in the second shell 1-2; the air inlet 1-3 is arranged on the side wall of the second shell 1-2 and close to the open end, and the first air outlet 1-4 is located at the bottom of the second shell 1-2. Preferably, the open end of the second shell 1-2 is provided with an arc-shaped flange 6, and the periphery of the first shell 1-1 is provided with a limit groove 1-8 adapted to the arc-shaped flange 6 to prevent the first shell 1-1 from shifting after the second shell 1-2 is buckled; at the same time, the strength of the first shell 1-1 and the second shell 1-2 can also be increased.

[0029] As a further improvement of the utility model, it also includes a locking member 5, which is used to connect and fix the first shell 1-1 and the second shell 1-2. Preferably, the locking member 5 can be a locking bolt 5-1 and a locking nut 5-2. The locking bolt 5-1 passes through the second shell 1-2, the filter element bracket 3, the filter element 2, and the first shell 1-1 in sequence, and is connected to the locking bolt 5-1. At this time, the locking bolt 5-1 and the locking nut 5-2 press the first shell 1-1 and the second shell 1-2, and at the same time, the limit part 1-5 presses and fixes the filter element 2 and the filter element bracket 3. Preferably, a connecting seat 1-7 that abuts against the locking bolt 5-1 is provided at the lower part of the second shell 1-2, and the connecting seat 1-7 is integrally arranged with the second shell 1-2; a connecting boss 1-6 that abuts against the locking nut 5-2 is also provided on the first shell 1-1, and the connecting boss 1-6 protrudes toward the outside of the air filter housing 1 to prevent the locking nut 5-2 from squeezing and deforming the first shell 1-1.

[0030] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. An air filter assembly for a unit, comprising a filter element (1) and an air filter housing (2) capable of enclosing the filter element (1), characterized in that: The air filter housing (2) is provided with an air inlet (1-3) and a first air outlet (1-4) connected to the engine air inlet (1-3); the filter element (1) is located between the air inlet (1-3) and the first air outlet (1-4); a filter element bracket (3) is provided between the filter element (1) and the first air outlet (1-4); the filter element bracket (3) comprises a protective portion (3-1) and a ventilating portion (3-2); the protective portion (3-1) corresponds to the first air outlet (1-4).

2. The unit air filter assembly according to claim 1, characterized in that: A cavity capable of accommodating gas is formed between the filter element support (3) and the air filter housing (2).

3. The unit air filter assembly according to claim 2, characterized in that: One end of the air filter housing (2) is provided with an inwardly recessed limiting portion (1-5), and the limiting portion (1-5) is used to press the filter element (1) against the filter element bracket (3).

4. The unit air filter assembly according to claim 1, characterized in that: The air inlet (1-3) is arranged on the side wall of the air filter housing (2).

5. The unit air filter assembly according to claim 1, characterized in that: It also comprises a reinforcing plate (4), the reinforcing plate (4) being located between the filter element support (3) and the first air outlet (1-4); the reinforcing plate (4) is provided with a second air outlet (4-1) adapted to the first air outlet (1-4).

6. The unit air filter assembly according to claim 1, characterized in that: The air filter housing (2) comprises a first shell (1-1) and a second shell (1-2).

7. The unit air filter assembly according to claim 6, characterized in that: It also comprises a locking member (5), wherein the locking member (5) is used to connect and fix the first shell (1-1) and the second shell (1-2).

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