Oil bath type air filter and filter equipment

Abstract

The invention provides an oil bath type air filter and filter equipment, and relates to the technical field of air filters. The oil bath type air filter comprises a shell sub-assembly and an oil bath sub-assembly, wherein the shell sub-assembly comprises an upper shell and a lower shell; a cavity is formed between the upper shell and the lower shell; the inner shell sub-assembly and the pre-filter element sub-assembly are both installed in the cavity, and the inner shell sub-assembly is located on the upper side of the pre-filter element sub-assembly. The inner shell sub-assembly comprises a flow guide cover and a filter element supporting shell, and the flow guide cover is used for separating moisture in air; the pre-filter element sub-assembly comprises a filter element frame, and the flow guide cover, the filter element supporting shell and the filter element frame are sequentially communicated to form an air passage. According to the oil bath type air filter, moisture in air entrained with rain and snow and entering the filter is efficiently separated.

Description

Technical Field

[0001] The present application relates to the technical field of air filters, and in particular to an oil bath air filter and a filter device. Background Art

[0002] Air filters are devices specially designed to remove impurities from the air and are widely used in heavy-duty vehicle ventilation systems to protect the engine and other components. For heavy-duty vehicles, the design of the air filter is more complex, with a large pre-filter device in addition to the fine filter. Such a double-layer filtration system allows the vehicle to effectively block a large number of dust particles when operating in an environment with high dust concentration, thereby extending the maintenance and replacement cycle of the filter.

[0003] However, for heavy vehicles, this air filter design mainly deals with the problem of high-concentration dust, but has limitations in terms of weather conditions. The air filter is mainly arranged on the chassis. When driving in rainy and snowy weather, the air mixed with rain and snow will follow the pipe into the oil filter and mix with the oil, causing premature wear of the engine and excessive oil loss, causing pollution of the air filter and reducing its lifespan. Summary of the invention

[0004] The present application provides an oil bath air filter and a filter device for efficiently separating moisture from air carrying rain and snow entering the filter.

[0005] In a first aspect, the present application provides an oil bath air filter, the oil bath air filter comprising an outer shell sub-assembly, an inner shell sub-assembly and a pre-filter element sub-assembly;

[0006] The outer shell subassembly includes an upper shell and a lower shell; a cavity is formed between the upper shell and the lower shell; the inner shell subassembly and the pre-filter element subassembly are both installed inside the cavity, and the inner shell subassembly is located on the upper side of the pre-filter element subassembly;

[0007] The upper shell and the lower shell are sealed and connected via a first cross-type sealing structure and a plurality of first sealing rings matching the first cross-type sealing structure;

[0008] The inner shell sub-assembly includes a guide cover and a filter element support shell, the guide cover is used to separate moisture in the air; the guide cover and the filter element support shell are sealed and connected through a second cross-type sealing structure and a plurality of second sealing rings matching the second cross-type sealing structure;

[0009] The pre-filter element sub-assembly comprises a filter element frame, and a guide cover, a filter element support shell and a filter element frame are connected in sequence to form an air passage.

[0010] In a possible design, a side water collecting tray is provided on one side of the deflector;

[0011] The side water collecting pan comprises a vertically arranged partition, an inclinedly arranged baffle structure and a horizontally annularly arranged water collecting pan, the bottom edge of the baffle structure is connected to the top edge of the partition, and the bottom edge of the partition is connected to the water collecting pan;

[0012] The water collecting tray is provided with a water outlet.

[0013] In one possible design, the lower shell includes a lower shell body, a boss, a square cavity and a drainage bag;

[0014] The boss is arranged on one side of the lower shell body close to the water outlet, the square cavity is arranged on the boss, and the upper surface of the square cavity is lower than the upper surface of the lower shell body;

[0015] The square cavity is communicated with the drainage bag, and the water collected in the water collecting tray is used to flow into the drainage bag through the water outlet and the square cavity.

[0016] In a possible design, the inner shell subassembly further includes a flow guide tube;

[0017] The first end of the flow guide pipe is connected to the water outlet, and the second end of the flow guide pipe is lower than the upper surface of the square cavity;

[0018] A rubber sealing pad is arranged on the upper surface of the square cavity.

[0019] In one possible design, the upper housing includes an upper housing body, an air inlet, and an air outlet;

[0020] The air inlet is arranged at one side of the top of the upper shell body, and the air inlet is used to guide air to enter;

[0021] The air outlet is arranged at the top of the upper shell body, and the air outlet is used to discharge the filtered air;

[0022] The baffle structure is coaxially arranged with the air inlet, and the structure of the baffle structure is a flange design structure.

[0023] In one possible design, the upper housing further includes an oil filling port and an oil dipstick;

[0024] The oil filling port is arranged at a corner of the top of the upper shell body, and the oil dipstick is inserted into the cavity through the oil filling port.

[0025] In a possible design, the lower shell further includes a second shell flange, a plurality of buckles, a drain nozzle and a guard plate, and the upper shell further includes a first shell flange;

[0026] The first shell flange is arranged on the lower surface of the upper shell body, the second shell flange is arranged on the upper surface of the lower shell body, and a plurality of buckles are evenly distributed on the lower shell body;

[0027] The first housing flange and the second housing flange are connected in a sealing manner through a first cross-type sealing structure 500, a plurality of first sealing rings and a plurality of buckles;

[0028] The drain nozzle and the guard plate are both arranged on the lower surface of the lower shell body, and the drain nozzle is lower than the guard plate.

[0029] In a possible design, the structure of the filter element support shell is an arched mesh multi-layer structure, and each layer of the filter element support shell is used to install the filter element;

[0030] The inner shell sub-assembly also includes a plurality of long screws;

[0031] The flow guide cover and the filter element supporting shell are sealed and connected via a second cross-type sealing structure, a plurality of second sealing rings and a plurality of long screws.

[0032] In a possible design, the pre-filter element sub-assembly also includes an oil wire assembly and an oil baffle plate.

[0033] In a second aspect, the present application provides a filter device, the filter device comprising:

[0034] An oil bath air filter as described in the first aspect of the invention, and a plurality of filter elements installed in a filter element support shell of the oil bath air filter.

[0035] The present application provides an oil bath air filter and filter equipment, wherein the outer shell subassembly includes an upper shell and a lower shell; a cavity is formed between the upper shell and the lower shell; the inner shell subassembly and the pre-filter element subassembly are both installed inside the cavity, and the inner shell subassembly is located on the upper side of the pre-filter element subassembly; the upper shell and the lower shell are sealed and connected by a first cross-type sealing structure and a plurality of first sealing rings matching the first cross-type sealing structure; the inner shell subassembly includes a shroud and a filter element support shell, and the shroud is used to separate moisture in the air; the shroud and the filter element support shell are sealed and connected by a second cross-type sealing structure and a plurality of second sealing rings matching the second cross-type sealing structure; the pre-filter element subassembly includes a filter element frame, and the shroud, the filter element support shell and the filter element frame are connected in sequence to form an air passage. The following technical effects are achieved: through the design of the inner shell sub-assembly and the outer shell sub-assembly, the airflow carrying moisture is filtered through the high-position intake duct and the oil filter intake pipe, and the moisture is still discharged due to gravity through the design of the inner shell sub-assembly; through the design of the pre-filter element sub-assembly and the filter element, the oil bath air filter filters the dust and particulate matter in the airflow and removes impurities in the airflow; through the sealing structure between the inner shell sub-assembly, the outer shell sub-assembly and the pre-filter element sub-assembly, good sealing is guaranteed to ensure that all incoming air must be filtered through the filter, and unfiltered air will not bypass and enter the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0037] Figure 1 A schematic diagram of a scenario of an oil bath air filter provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of an oil bath air filter provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the internal structure of an oil bath air filter provided in an embodiment of the present application;

[0040] Figure 4 A cross-sectional view of the internal structure of an oil bath air filter provided in an embodiment of the present application;

[0041] Figure 5 A top view of the upper housing structure of the oil bath air filter provided in an embodiment of the present application;

[0042] Figure 6 A partial enlarged view of the upper and lower housing sealing structure of the oil bath air filter provided in an embodiment of the present application;

[0043] Figure 7 Schematic diagram of the lower housing structure of the oil bath air filter provided in the embodiment of the present application Figure 1 ;

[0044] Figure 8 Schematic diagram of the lower housing structure of the oil bath air filter provided in the embodiment of the present application Figure 2 .

[0045] Reference numerals:

[0046] 100-Oil bath air filter; 500-Heavy duty vehicle; 600-Air;

[0047] 200-outer shell sub-assembly; 300-inner shell sub-assembly; 400-pre-filter element sub-assembly; 210-upper shell; 220-lower shell; 310-flow guide cover; 320-filter element support shell; 410-filter element frame; 420-oil wire assembly; 430-oil baffle plate;

[0048] 2101-upper shell body; 2102-air inlet; 2103-air outlet; 2104-oil filling port; 2105-oil dipstick; 2107-first shell flange; 2201-lower shell body; 2202-boss; 2203-square cavity; 2204-drain bag; 2205-drain valve; 2206-second shell flange; 2207-drain nozzle; 2208-guard plate; 2209-rubber sealing pad; 230-buckle; 250-first sealing ring; 251-round rubber sealing ring; 260-U-shaped sealing ring;

[0049] 330-side water collecting tray; 340-partition; 350-baffle structure; 3301-water collecting tray; 3302-water outlet; 360-flow guide pipe; 370-long screw; 380-second cross-type sealing structure; 390-second sealing ring; 3303-reinforcement ribs. DETAILED DESCRIPTION

[0050] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0051] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way. In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more.

[0052] It should be noted that the "at..." in the embodiment of the present application can be the instant when a certain situation occurs, or can be a period of time after a certain situation occurs, and the embodiment of the present application does not specifically limit this. In addition, the oil bath air filter provided in the embodiment of the present application is only used as an example, and the oil bath air filter can also include more or less content.

[0053] In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0054] Oil bath air filter: Oil bath air filter is an air filter device that uses engine oil to capture and filter dust and particles in the air. The equipment is a vertical cylindrical container made of steel plates, which is divided into three parts, namely the outer interlayer, the inner interlayer, and the straight section.

[0055] Shell subassembly: The shell subassembly of the oil bath air filter is the external frame and protective structure of the entire filter device. It plays a vital role in ensuring the normal operation of the filter, that is, the outer layer of the above-mentioned oil bath air filter.

[0056] Inner shell subassembly: The inner shell subassembly of the oil bath air filter is the core part of the entire filter. It is responsible for guiding the airflow and effectively filtering dust and particulate matter in the air through the oil layer, and cooperates with the outer shell subassembly to realize the water collection and drainage function.

[0057] Pre-filter element subassembly: The pre-filter element subassembly of the oil bath air filter is the straight section of the above-mentioned oil bath air filter. Its main function is to initially capture and remove larger particles when the air enters the oil bath filter.

[0058] With the invention and development of the internal combustion engine, people gradually realized that some form of air filtration was needed to protect the engine from dust and other impurities. Oil bath air filters began to appear and be used. This design takes advantage of the property of motor oil to adhere to dust particles and capture pollutants by passing air through a layer of oil. It is used in heavy-duty vehicle ventilation systems.

[0059] In the air filtration system of heavy-duty vehicles, in addition to the fine filter with ordinary filter paper in the intake system pipeline, it is usually necessary to connect a large pre-filter device in series to extend the maintenance cycle of the fine filter in the operating area with excessively high dust concentration, so as to avoid too frequent maintenance of the filter element while ensuring the service life of the engine.

[0060] Considering that most heavy-duty vehicles work in harsh environments or specific industrial areas, their oil bath air filters need to be able to handle large amounts of dust without frequent replacement of filter elements, and can also work stably under high or low temperature conditions. However, most oil bath air filters are not on the chassis of the vehicle and are located at the lowest position of the intake system. When driving in rainy and snowy weather, the air will carry rain and snow into the pipeline from the high-position intake port of the intake system. Even if there is a drainage device along the pipeline, a lot of water will still enter the oil filter due to the air flow and mix with the oil. As the amount of water accumulates, the intake resistance increases, causing premature wear of the engine, and will also lead to excessive oil loss rate, causing pollution of the paper filter in the air filter, and reducing its life.

[0061] In the prior art, a water separation structure is provided at the air filter inlet. The oil filter inlet is usually designed as a double layer, so that the water coming down from the wall when the air flows through is retained between the double layers and discharged in combination with the preset drain port on the outside of the air inlet. This structure is generally combined with the preset water collection and drainage structure at the air inlet and outlet of the high-position air inlet. This type of structure can ensure a high water removal efficiency at a certain flow rate, but when the air flow rate is too high, the air flow velocity increases significantly, and the amount of water carried by the air flow will also increase, and the water-oil separation efficiency is low. This type of structure has low versatility, and the proportion of effectively collecting and discharging water is limited.

[0062] In order to solve the above problems, the oil bath air filter is structurally designed to achieve water-oil separation.

[0063] Furthermore, the oil bath air filter should adopt a multi-layer structure design to ensure good sealing of the oil bath air filter and prevent dust and particulate matter from entering other air flow ducts.

[0064] Furthermore, the oil bath air filter should have a structural design that is not affected by the flow rate and can intercept and collect drainage over a large area.

[0065] Furthermore, the oil bath air filter should be versatile and be able to effectively collect and increase the proportion of water discharged through the overall design of the outer shell sub-assembly, the inner shell sub-assembly and the pre-filter element sub-assembly without being affected by the gas flow rate and flow rate.

[0066] Based on this, the embodiments of the present application provide an oil bath air filter and a filter device, which can be used in the field of air filter technology, and are intended to efficiently separate moisture from air carrying rain and snow that enters the filter.

[0067] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0068] Figure 1 This is a schematic diagram of the oil bath air filter provided in the embodiment of the present application. It should be noted that: Figure 1 What is shown are merely examples of scenarios to which the embodiments of the present application can be applied, to help those skilled in the art understand the technical content of the present application, but it does not mean that the embodiments of the present application cannot be used in other devices, systems, environments or scenarios.

[0069] like Figure 1 , a schematic diagram of a scenario of an oil bath air filter is shown, including: an oil bath air filter 100 , a heavy vehicle 500 and air 600 .

[0070] The heavy vehicle 500 may be in a driving state or in a stopped state. The air 600 usually carries rain, snow, moisture, dust and particulate matter.

[0071] The oil bath air filter 100 is installed at the chassis of the heavy vehicle 500. Under the working condition of the heavy vehicle 500, the air 600 enters the air inlet of the oil bath air filter 100, and the oil bath air filter 100 starts to work. Through the combination of the three structural designs of the outer shell sub-assembly, the inner shell sub-assembly and the pre-filter element sub-assembly, the dust and particulate matter are filtered, and the moisture in the air 600 is separated, and a large area of ​​throttling and drainage are collected from the inlet.

[0072] Figure 2 A schematic diagram of the structure of an oil bath air filter provided in an embodiment of the present application. Figure 3 A schematic diagram of the internal structure of an oil bath air filter provided in an embodiment of the present application.

[0073] This embodiment Figure 1 Based on the scenario, the oil bath air filter 100 is described in detail. Figure 2 and Figure 3 As shown, the oil bath air filter 100 includes an outer shell subassembly 200, an inner shell subassembly 300 and a pre-filter element subassembly 400;

[0074] The outer shell subassembly 200 includes an upper shell 210 and a lower shell 220; a cavity is formed between the upper shell 210 and the lower shell 220; the inner shell subassembly 300 and the pre-filter subassembly 400 are both installed inside the cavity, and the inner shell subassembly 300 is located on the upper side of the pre-filter subassembly 400;

[0075] The upper shell 210 and the lower shell 220 are sealed and connected via a first cross-type sealing structure 500 and a plurality of first sealing rings 250 matching the first cross-type sealing structure 500;

[0076] The inner shell sub-assembly 300 includes a flow guide cover 310 and a filter element support shell 320. The flow guide cover 310 is used to separate moisture in the air. The flow guide cover 310 and the filter element support shell 320 are sealed and connected through a second cross-type sealing structure 380 and a plurality of second sealing rings 390 matching the second cross-type sealing structure 380.

[0077] The pre-filter sub-assembly 400 includes a filter frame 410, and the air guide cover 310, the filter support shell 320 and the filter frame 410 are connected in sequence to form an air passage.

[0078] Specifically, the oil bath air filter 100 includes a multi-layer structure, which includes an outer shell sub-assembly 200 , an inner shell sub-assembly 300 and a pre-filter element sub-assembly 400 .

[0079] The housing subassembly 200 includes an upper housing 210 and a lower housing 220. The upper housing 210 includes an upper housing body 2101, an air inlet 2102 and an air outlet 2103. The air inlet 2102 and the air outlet 2103 guide the air carrying moisture into the filter and discharge the filtered air out of the filter respectively. The upper housing 210 also includes an oil filling port 2104, an oil dipstick 2105 and an oil plug, which are used to inject engine oil and check the engine oil content in time to ensure the working efficiency of the oil bath air filter.

[0080] The inner shell subassembly 300 includes a flow guide cover 310 and a filter element support shell 320. The flow guide cover 310 is provided with holes matching the sizes of the air inlet 2102 and the air outlet 2103 so that the air in the air inlet 2102 and the air outlet 2103 does not leak.

[0081] A partition 340 and a side water collecting tray 330 are provided on one side of the air deflector 310. The partition 340 is provided on a side close to the air deflector 310. One side of the partition 340 separates the drain port from the shell wall. The other side of the partition 340 is connected to three evenly distributed reinforcing ribs 3303 of the air deflector, and an air flow channel is reserved. The side water collecting tray 330 is overall shaped into a concave shape, and a water outlet 3302 is provided at the lowest point of the concave shape, and the separated water is discharged through the water outlet 3302. The baffle structure 350 is provided on the side of the air deflector 310 close to the air inlet. The baffle structure 350 is arranged obliquely, and the edge of the baffle structure 350 has a downward flange design to achieve cooperation with the partition of the side water collecting tray, to ensure the water separation efficiency and take into account the influence of the initial resistance. The inner shell sub-assembly 300 also includes a guide pipe 360, which is used to drain the water discharged from the water outlet 3302.

[0082] The filter element support shell 320 and the air guide cover 310 are adapted to the edges of the contact parts, and are sealed and connected by the second cross-type sealing structure 380, multiple second sealing rings 390 and multiple long screws 370 to ensure good sealing. The structure of the filter element support shell 320 is an arched mesh multi-layer structure, and the filter element is fixed in series with multiple long screws 370.

[0083] The lower shell 220 includes a lower shell body 2201, a boss 2202, a square cavity 2203 and a drainage bag 2204. The square cavity 2203 is installed above the boss 2202, and the bottom of the square cavity 2203 is connected to the drainage bag 2204 to form a water flow path. The water collected in the water collection tray 3301 is used to flow into the drainage bag 2204 through the water outlet 3302 and the square cavity 2203. The lower shell 220 also includes a drainage valve 2205 for draining water or oil.

[0084] The pre-filter sub-assembly 400 includes a filter frame 410, an oil wire assembly 420 and an oil baffle plate 430, and is used to remove larger particles from the intake air flow.

[0085] The present application provides an oil bath air filter, wherein the outer shell subassembly comprises an upper shell and a lower shell; a cavity is formed between the upper shell and the lower shell; the inner shell subassembly and the pre-filter element subassembly are both installed inside the cavity, and the inner shell subassembly is located on the upper side of the pre-filter element subassembly; the upper shell and the lower shell are sealed and connected by a first cross-type sealing structure and a plurality of first sealing rings matching the first cross-type sealing structure; the inner shell subassembly comprises a shroud and a filter element support shell, and the shroud is used to separate moisture from the air; the shroud and the filter element support shell are sealed and connected by a second cross-type sealing structure and a plurality of second sealing rings matching the second cross-type sealing structure; the pre-filter element subassembly comprises a filter element frame, and the shroud, the filter element support shell and the filter element frame are connected in sequence to form an air passage. The following technical effects are achieved: through the design of the inner shell sub-assembly and the outer shell sub-assembly, the airflow carrying moisture is filtered through the high-position intake duct and the oil filter intake pipe, and the moisture is still discharged due to gravity through the design of the inner shell sub-assembly; through the design of the pre-filter element sub-assembly and the filter element, the oil bath air filter filters the dust and particulate matter in the airflow and removes impurities in the airflow; through the sealing structure between the inner shell sub-assembly, the outer shell sub-assembly and the pre-filter element sub-assembly, good sealing is guaranteed to ensure that all incoming air must be filtered through the filter, and unfiltered air will not bypass and enter the engine.

[0086] like Figure 3 FIG. 1 shows the structure of the oil bath air filter after the upper shell body and the lower shell body are removed.

[0087] In a possible design, a side water collecting tray 330 is provided on one side of the air deflector 310;

[0088] The side water collecting tray 330 includes a vertically arranged partition 340, an inclinedly arranged baffle structure 350 and a horizontally annularly arranged water collecting tray 3301, the bottom edge of the baffle structure 350 is connected to the top edge of the partition 340, and the bottom edge of the partition 340 is connected to the water collecting tray 3301;

[0089] A water outlet 3302 is provided on the water collecting tray 3301 .

[0090] Specifically, a side water collecting tray 330 is provided on one side of the air deflector 310. The side water collecting tray 330 includes a vertically arranged partition plate 340, an inclinedly arranged baffle plate structure 350 and a horizontally annularly arranged water collecting tray 3301.

[0091] The water collecting tray 3301 arranged in a horizontal ring is of an overall concave shape, and the water outlet 3302 is set at the lowest point of the water collecting tray 3301.

[0092] The side of the air inlet 2102 close to the air guide cover 310 is designed with an inclined The baffle structure 350. A partition 340 is provided on one side of the side water collecting tray 330 close to the guide cover 310, and the height of the partition is 65 mm. The position of the partition 340 can separate the water outlet 3302 from one side of the shell wall.

[0093] The bottom edge of the baffle structure 350 is connected to the top edge of the partition 340, and the bottom edge of the partition 340 is connected to the water collecting tray 3301 to discharge the collected water through the water outlet 3302 of the water collecting tray 3301. The partition 340 is arranged obliquely to collect water.

[0094] The technical effect provided by this embodiment is that reliable drainage is ensured by designing a concave shape and a water collecting pan at the lowest point; through the coordinated design between the water collecting pan, partition and baffle structure, coordination with the water collecting pan is achieved to ensure water separation efficiency while taking into account the influence of initial resistance.

[0095] Figure 4 A cross-sectional view of the internal structure of an oil bath air filter provided in an embodiment of the present application. Figure 5 A top view of the upper housing structure of the oil bath air filter provided in an embodiment of the present application; Figure 6 A partial enlarged view of the upper and lower housing sealing structure of the oil bath air filter provided in an embodiment of the present application; Figure 7 Schematic diagram of the lower housing structure of the oil bath air filter provided in the embodiment of the present application Figure 1 ; Figure 8 Schematic diagram of the lower housing structure of the oil bath air filter provided in the embodiment of the present application Figure 2 .

[0096] like Figure 7 and Figure 8 As shown, the structural design of the lower shell is shown.

[0097] In one possible design, the lower housing 220 includes a lower housing body 2201 , a boss 2202 , a square cavity 2203 , and a drainage bag 2204 ;

[0098] The boss 2202 is arranged on one side of the lower shell body 2201 close to the water outlet 3302, and the square cavity 2203 is arranged on the boss 2202, and the upper surface of the square cavity 2203 is lower than the upper surface of the lower shell body 2201;

[0099] The square cavity 2203 is in communication with the drainage bag 2204 , and the water collected in the water collecting tray 3301 is used to flow into the drainage bag 2204 through the water outlet 3302 and the square cavity 2203 .

[0100] Specifically, if Figure 4 As shown, the lower housing body 2201 is injection molded.

[0101] The lower shell 220 includes a lower shell body 2201 , a boss 2202 , a square cavity 2203 and a drainage bag 2204 .

[0102] The boss 2202 is arranged inside the lower shell body 2201 and close to the wall of one side of the air inlet 2102. The height of the boss 2202 is set to 63 mm. A square cavity 2203 is arranged on the boss 2202. The upper surface of the square cavity 2203 is lower than the upper surface of the lower shell body 2201, that is, the length range of the square cavity 2203 is lower than the distance from the square cavity 2203 to the upper surface of the lower shell body 2201.

[0103] The bottom of the square cavity 2203 is connected to the drainage bag 2204 to form a water flow path. The water collected in the water collecting tray 3301 is used to flow into the drainage bag 2204 through the water outlet 3302 and the square cavity 2203.

[0104] In addition, a drain valve 2205 is provided at the bottom of the lower shell 220. The drain valve 2205 can be used to tighten by hand and ensure the sealing. It is used to discharge water or oil without disassembling the shell to facilitate the maintenance of the oil filter.

[0105] The technical effect provided by this embodiment is that a water flow path is formed through the connection between the boss of the lower shell, the square cavity and the drainage bag, and the water flowing out of the water outlet of the water collecting tray flows into the drainage bag through this water flow path.

[0106] In a possible design, the inner shell subassembly 300 further includes a flow guide tube 360;

[0107] The first end of the flow guide pipe 360 ​​is connected to the water outlet 3302, and the second end of the flow guide pipe 360 ​​is lower than the upper surface of the square cavity 2203;

[0108] A rubber sealing pad 2209 is provided on the upper surface of the square cavity 2203 .

[0109] Specifically, if Figure 3 As shown, the inner shell subassembly 300 further includes a flow guide tube 360 ​​, wherein the first end of the flow guide tube 360 ​​is referred to as a head end, and the second end of the flow guide tube 360 ​​is referred to as a tail end.

[0110] The first end of the guide pipe 360 ​​is connected to the water outlet 3302, and the water discharged from the water outlet 3302 can flow into the guide pipe 360. The second end of the guide pipe 360 ​​is lower than the upper surface of the square cavity 2203, that is, the water discharged from the guide pipe 360 ​​can be discharged through the square cavity 2203.

[0111] A rubber sealing pad 2209 is disposed on the upper surface of the square cavity 2203. The rubber sealing pad 2209 has an elliptical hole in the middle, which is interference fit with the outer diameter of the flow guide tube 360. The sealing pad area is larger than the outer diameter of the square cavity to avoid gaps.

[0112] The technical effect provided by this embodiment is that, through the design of the guide pipe and the setting of the rubber sealing pad, the water outlet, the guide pipe, the square cavity, and the subsequent structure drainage bag, etc., form a complete water flow path and ensure good sealing.

[0113] like Figure 2 As shown, in a possible design, the upper housing 210 includes an upper housing body 2101, an air inlet 2102 and an air outlet 2103;

[0114] The air inlet 2102 is disposed on one side of the top of the upper housing body 2101, and the air inlet 2102 is used to guide air to enter;

[0115] The air outlet 2103 is disposed at the top of the upper shell body 2101, and the air outlet 2103 is used to discharge the filtered air;

[0116] The baffle structure 350 is coaxially arranged with the air inlet 2102 , and the structure of the baffle structure 350 is a flanged design structure.

[0117] Specifically, if Figure 2 , Figure 5 As shown, the upper housing 210 includes an upper housing body 2101, an air inlet 2102 and an air outlet 2103. The upper housing body 2101 is injection molded and is sealed with the lower housing body 2201 to form a sealed integral structure.

[0118] The air inlet 2102 is disposed on one side of the top of the upper shell body 2101 to guide air into the air filter, usually extending downward to the oil pool close to the oil bath air filter, so that the air forms a vortex or directly contacts the oil surface when entering.

[0119] The air outlet 2103 is arranged at the center position of the top of the upper shell body 2101 , and the filtered air is discharged from the air outlet 2103 , ensuring that the relatively clean air after the oil bath treatment can rise and leave the air filter through the air outlet 2103 .

[0120] The baffle structure 350 is coaxially arranged with the air inlet 2102, and the edge of the baffle structure 350 is inclined downward. Flanging structure design.

[0121] The technical effect provided by this embodiment is that, through the design of the air inlet and the air outlet, the air carrying moisture and impurities and the purified air are designed with separate passages, thereby avoiding uneven gas mixing.

[0122] In one possible design, the upper housing 210 further includes an oil filling port 2104 and an oil dipstick 2105;

[0123] The oil filling port 2104 is disposed at a corner of the top of the upper shell body 2101 , and the oil dipstick 2105 is inserted into the cavity through the oil filling port 2104 .

[0124] Specifically, if Figure 2 and Figure 3 As shown, the upper housing 210 is also provided with an oil filling port 2104 and an oil dipstick 2105 .

[0125] The oil filling port 2104 is disposed at a corner of the upper outer side of the upper shell 210 , and oil can be added to the oil bath air filter through the oil filling port.

[0126] The dipstick 2105 has a certain length, and the specific length is determined according to the oil bath air filter oil tank or oil pool of different heavy vehicles.

[0127] In addition, the oil filling port 2104 is also equipped with an oil plug, on which a refueling mark is engraved. The oil dipstick 2105 can be inserted into the cavity through the oil filling port 2104, and the oil plug is connected to the oil dipstick 2105 to obtain the oil level.

[0128] The technical effect provided by this embodiment is that, through the design of the oil filling port, the oil plug, and the oil dipstick, the oil dipstick and its surrounding area can be regularly checked for leaks or other abnormalities to ensure the normal operation of the air filter.

[0129] like Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, Figure 6 The sealing method between the first shell flange 2107 of the upper shell 210 and the second shell flange 2206 of the lower shell 220 is shown.

[0130] In a possible design, the lower shell 220 further includes a second shell flange 2206, a plurality of buckles 230, a drain nozzle 2207 and a guard plate 2208, and the upper shell 210 further includes a first shell flange 2107;

[0131] The first shell flange 2107 is arranged on the lower surface of the upper shell body 2101, the second shell flange 2206 is arranged on the upper surface of the lower shell body 2201, and a plurality of buckles 230 are evenly distributed on the lower shell body 2201;

[0132] The first housing flange 2107 and the second housing flange 2206 are sealed and connected via a first cross-type sealing structure 500, a plurality of first sealing rings 250 and a plurality of buckles 230;

[0133] The drain nozzle 2207 and the guard plate 2208 are both arranged on the lower surface of the lower shell body 2201, and the drain nozzle 2207 is lower than the guard plate 2208.

[0134] Specifically, the upper shell 210 further includes a first shell flange 2107 , and the first shell flange 2107 is designed around the bottom of the upper shell 210 .

[0135] A second shell flange 2206 is arranged around the top upper surface of the lower shell body 2201 . A plurality of buckles 230 are also installed on the lower shell body 2201 . The plurality of buckles 230 are evenly distributed on the lower shell body 2201 .

[0136] The first shell flange 2107 and the second shell flange 2206 are sealed and connected by multiple evenly distributed buckles 230, a first cross-type sealing structure 500 and multiple first sealing rings 250, that is, the upper shell 210 and the lower shell 220 are sealed and connected by multiple buckles, a first cross-type sealing structure 500 and multiple first sealing rings 250. The multiple first sealing rings 250 include two circular rubber sealing rings 251 and a U-shaped sealing ring 260. For specific sealing methods, please refer to Figure 7 .

[0137] The guard plate 2208 refers to the outer shell guard plate of the oil bath air filter, which mainly protects the internal components and maintains the normal operation of the entire device. The guard plate 2208 is installed on the lower shell body 2201. The drainage bag 2204 is L-shaped and faces the shell side. The drainage nozzle 2207 is set at the bottom end of the lower shell body 2201 and is lower than the guard plate 2208 to facilitate the drainage of water.

[0138] The technical effect provided by this embodiment is that, through the outer shell flange design and multiple sealing structure designs, the sealing of the oil bath air filter is ensured and the uneven separation of water and oil is avoided.

[0139] In a possible design, the structure of the filter element support shell 320 is an arched mesh multi-layer structure, and each layer of the filter element support shell 320 is used to install the filter element;

[0140] The inner housing subassembly 300 further includes a plurality of long screws 370;

[0141] The flow guide cover 310 and the filter element support shell 320 are sealed and connected via a second cross-type sealing structure 380 , a plurality of second sealing rings 390 and a plurality of long screws 370 .

[0142] Specifically, if Figure 3 and Figure 4 As shown, the structure of the filter element support shell 320 is an arched mesh multilayer structure for mounting multiple filter elements. Two long screws 370 are embedded in the coaxial axis on which the filter elements are mounted. The long screws 370 are 273 mm long and are used to fix the filter elements in series.

[0143] The lower edge of the air guide cover 310 and the upper portion of the filter element support shell 320 are designed to be matched and sealed by a second cross-type sealing structure 380 , a plurality of second sealing rings 390 and a plurality of long screws 370 .

[0144] The technical effect provided by this embodiment is that the filter element support shell is designed as a multi-layer structure, and the filter elements are fixed separately, which can improve the filtering efficiency; the filter element support shell and the guide cover are sealed and connected through the sealing structure and multiple sealing rubber rings, ensuring good sealing performance.

[0145] In a possible design, the pre-filter element sub-assembly 400 further includes an oil wire assembly 420 and an oil baffle plate 430 .

[0146] Specifically, if Figure 3 and Figure 4 As shown, the pre-filter sub-assembly 400 includes a filter frame 410, an oil wire assembly 420 and an oil baffle plate 430. The pre-filter sub-assembly 400 is used to remove larger particles, such as dust, sand and other large-sized impurities, from the intake air flow.

[0147] The oil thread assembly 420 is inside the filter element frame 410 .

[0148] The technical effect provided by this embodiment is that the pre-filter element sub-assembly can significantly reduce the workload of the subsequent oil bath filtration stage, improve the overall filtration efficiency, and protect the engine oil from being contaminated prematurely.

[0149] The present application provides a filter device, the filter device comprising:

[0150] An oil bath type air filter and a plurality of filter elements installed in a filter element support housing 320 of the oil bath type air filter.

[0151] Specifically, the filter device includes a filter device and a plurality of filter elements.

[0152] The filter element is installed in the filter element support shell 320 in the oil bath air filter. Since the filter element support shell 320 is a multi-stage structure, multiple filter elements are installed, and the filter elements are strung in through a long screw 370, and a pair of butterfly nuts are tightened and secured between each layer to achieve filtering of impurities, dust, etc., and to achieve water collection and drainage.

[0153] The technical effect provided by this embodiment is similar to that of the oil bath air filter in the above-mentioned embodiment, and will not be described in detail in this embodiment.

[0154] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil bath air filter, characterized in that: The oil bath air filter (100) comprises an outer shell sub-assembly (200), an inner shell sub-assembly (300) and a pre-filter element sub-assembly (400); The outer shell sub-assembly (200) comprises an upper shell (210) and a lower shell (220); a cavity is formed between the upper shell (210) and the lower shell (220); the inner shell sub-assembly (300) and the pre-filter element sub-assembly (400) are both installed inside the cavity, and the inner shell sub-assembly (300) is located on the upper side of the pre-filter element sub-assembly (400); The upper shell (210) and the lower shell (220) are sealedly connected via a first cross-type sealing structure (500) and a plurality of first sealing rings (250) matching the first cross-type sealing structure (500); The inner shell sub-assembly (300) comprises a flow guide cover (310) and a filter element support shell (320), wherein the flow guide cover (310) is used to separate moisture from the air; the flow guide cover (310) and the filter element support shell (320) are sealedly connected via a second cross-type sealing structure (380) and a plurality of second sealing rings (390) matching the second cross-type sealing structure (380); The pre-filter element sub-assembly (400) comprises a filter element frame (410), and the air guide cover (310), the filter element support shell (320) and the filter element frame (410) are sequentially connected to form an air passage.

2. The oil bath air filter according to claim 1, characterized in that: A side water collecting tray (330) is provided on one side of the deflector cover (310); The side water collecting tray (330) comprises a vertically arranged partition (340), an inclinedly arranged baffle structure (350), and a horizontally annularly arranged water collecting tray (3301), wherein the bottom edge of the baffle structure (350) is connected to the top edge of the partition (340), and the bottom edge of the partition (340) is connected to the water collecting tray (3301); The water collection tray (3301) is provided with a water outlet (3302).

3. The oil bath air filter according to claim 2, characterized in that: The lower shell (220) comprises a lower shell body (2201), a boss (2202), a square cavity (2203) and a drainage bag (2204); The boss (2202) is arranged on a side of the lower shell body (2201) close to the water outlet (3302), the square cavity (2203) is arranged on the boss (2202), and the upper surface of the square cavity (2203) is lower than the upper surface of the lower shell body (2201); The square cavity (2203) is in communication with the drainage bag (2204), and the water collected in the water collecting tray (3301) is used to flow into the drainage bag (2204) through the water outlet (3302) and the square cavity (2203).

4. The oil bath air filter according to claim 3, characterized in that: The inner shell sub-assembly (300) further includes a flow guide pipe (360); The first end of the flow guide pipe (360) is connected to the water outlet (3302), and the second end of the flow guide pipe (360) is lower than the upper surface of the square cavity (2203); A rubber sealing pad (2209) is provided on the upper surface of the square cavity (2203).

5. The oil bath air filter according to claim 3 or 4, characterized in that: The upper shell (210) comprises an upper shell body (2101), an air inlet (2102) and an air outlet (2103); The air inlet (2102) is arranged on one side of the top of the upper shell body (2101), and the air inlet (2102) is used to guide air to enter; The air outlet (2103) is arranged at the top of the upper shell body (2101), and the air outlet (2103) is used to discharge filtered air; The baffle structure (350) is coaxially arranged with the air inlet (2102), and the structure of the baffle structure (350) is a flanged design structure.

6. The oil bath air filter according to claim 5, characterized in that: The upper housing (210) further comprises an oil filling port (2104) and an oil dipstick (2105); The oil filling port (2104) is arranged at a corner of the top of the upper shell body (2101), and the oil dipstick (2105) is inserted into the cavity through the oil filling port (2104).

7. The oil bath air filter according to claim 6, characterized in that: The lower shell (220) further comprises a second shell flange (2206), a plurality of buckles (230), a drainage nozzle (2207) and a guard plate (2208); and the upper shell (210) further comprises a first shell flange (2107); The first shell flange (2107) is arranged on the lower surface of the upper shell body (2101), the second shell flange (2206) is arranged on the upper surface of the lower shell body (2201), and the plurality of buckles (230) are evenly distributed on the lower shell body (2201); The first shell flange (2107) and the second shell flange (2206) are sealed and connected via the first cross-type sealing structure (500), the plurality of first sealing rings (250) and the plurality of buckles (230); The drainage nozzle (2207) and the guard plate (2208) are both arranged on the lower surface of the lower shell body (2201), and the drainage nozzle (2207) is lower than the guard plate (2208).

8. The oil bath air filter according to claim 1, characterized in that: The structure of the filter element support shell (320) is an arched mesh multi-layer structure, and each layer of the filter element support shell (320) is used to install the filter element; The inner shell sub-assembly (300) further includes a plurality of long screws (370); The flow guide cover (310) and the filter element support shell (320) are sealed and connected via the second cross-type sealing structure (380), the plurality of second sealing rings (390), and the plurality of long screws (370).

9. The oil bath air filter according to claim 8, characterized in that: The pre-filter element sub-assembly (400) further comprises an oil wire assembly (420) and an oil baffle plate (430).

10. A filter device, characterized in that: The filter device comprises: An oil bath air filter as claimed in any one of claims 1 to 9, and a plurality of filter elements installed in a filter element support shell (320) of the oil bath air filter.

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