Filter element structure and engine oil filter

Abstract

The invention relates to a filter element structure and an engine oil filter, the filter element structure comprises a first filter element, the first filter element comprises a water adsorption layer and a water blocking layer, the water adsorption layer is arranged outside the water blocking layer in a surrounding manner, and the water blocking layer is used for intercepting water drops separated from the water adsorption layer. Therefore, when the filter element structure is installed in a filter cavity of an engine oil filter element device, water in mixed engine oil can be absorbed by the water adsorption layer, then water drops are separated out by the water adsorption layer, the separated-out water drops are intercepted through the water blocking layer, and then the filtered engine oil does not contain water.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and particularly to a filter element structure and an oil filter. Background Art

[0002] New engines with zero or low carbon emissions have become a current development hotspot, such as hydrogen engines, ammonia engines, CNG (compressed natural gas) engines, etc. Compared with traditional engines, these new engines will inevitably generate a large amount of water during operation, and the generated water mixed into the engine oil is likely to cause problems such as emulsification and deterioration of the engine oil, thereby affecting the lubricating characteristics of the engine oil and ultimately possibly leading to engine failure. Currently, traditional oil filters are mainly used to filter out impurities such as metal particles and sludge mixed in the engine oil, but cannot effectively remove water. Summary of the Invention

[0003] Based on this, it is necessary to provide a filter element structure and an oil filter for the above problems, and this filter element structure can effectively filter out the water in the mixed engine oil.

[0004] A filter element structure includes: a first filter element, the first filter element includes a water adsorption layer and a water blocking layer, the water adsorption layer surrounds the water blocking layer, and the water blocking layer is used to intercept the water droplets precipitated from the water adsorption layer.

[0005] In the above filter element structure, the first filter element includes a water blocking layer and a water adsorption layer arranged inside and outside. Among them, the water adsorption layer is used to absorb water, and the water blocking layer is configured to intercept the water droplets precipitated from the water adsorption layer. Therefore, when this filter element structure is installed in the filter cavity of the oil filter, the water in the mixed engine oil will be inhaled by the water adsorption layer. Subsequently, the water adsorption layer precipitates water droplets, and the precipitated water droplets are intercepted by the water blocking layer, so that the filtered engine oil does not contain water.

[0006] In one embodiment, the water adsorption layer includes a part composed of molecular sieve.

[0007] In one embodiment, the water adsorption layer further includes a non-woven fabric sleeve, and the molecular sieve is accommodated in the non-woven fabric sleeve.

[0008] In one embodiment, the first filter element further includes a first filter layer, and the first filter layer surrounds the water adsorption layer and is used to intercept particulate impurities.

[0009] In one embodiment, the first filter element further includes a first central tube. Along the radial direction of the first central tube, the water-blocking layer, the water adsorption layer, and the first filter layer are sequentially disposed around the first central tube; and / or, the first filter element further includes a first upper end cap and a first lower end cap, and the water adsorption layer, the water-blocking layer, and the first filter layer are all clamped between the first upper end cap and the first lower end cap.

[0010] In one embodiment, the filter element structure further includes a second filter element, and the second filter element is stacked with the first filter element up and down.

[0011] In one embodiment, the second filter element includes a second central tube and a second filter layer, and the second filter layer is disposed around the second central tube and is used for intercepting particulate impurities.

[0012] In one embodiment, the second filter element further includes a second upper end cap and a second lower end cap, and the second central tube and the second filter layer are both clamped between the second upper end cap and the second lower end cap.

[0013] In one embodiment, the filter element structure further includes a bypass valve. A first through hole is provided on the second upper end cap, and the first through hole is communicated with the inner cavity of the central tube, and the bypass valve is installed at the first through hole.

[0014] This application also provides an oil filter, including: a housing and the filter element structure as described above, and the filter element structure is disposed in the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of the respective elements are only schematically drawn in the drawings and not necessarily drawn to the actual scale. In the drawings:

[0018] Figure 1 Schematically shows a three-dimensional structural schematic diagram of an oil filter in an embodiment of this application;

[0019] Figure 2 Schematically shows Figure 1 a U1-U1 cross-sectional view of

[0020] Figure 3 Schematically shows Figure 1 a three-dimensional schematic diagram of the filter element structure in the oil filter shown

[0021] Figure 4 Schematically shows Figure 3 a U2-U2 cross-sectional view of

[0022] Description of reference numerals:

[0023] 1000, oil filter; 100, filter element structure; 110, first filter element; 111, water adsorption layer; 112, water blocking layer; 113, first filter layer; 114, first central tube; 1141, first oil hole; 115, first upper end cap; 1151, first through hole; 116, first lower end cap; 1161, second through hole; 120, second filter element; 121, second central tube; 1211, second oil hole; 122, second filter layer; 123, second upper end cap; 1231, first perforation; 124, second lower end cap; 1241, second perforation; 130, second sealing ring; 140, bypass valve; 200, housing; 201, oil inlet; 202, oil outlet; 203, drain outlet; 210, bottom shell; 220, upper cover; 230, installation cavity; 231, filtration cavity; 232, water storage cavity. Detailed implementation manners

[0024] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0025] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides an oil filter 1000, which includes: a filter element structure 100 and a housing 200. The filter element structure 100 is detachably installed in the housing 200. When the oil filter 1000 is described below, the filter element structure 100 and the housing 200 will be described together.

[0026] Refer to Figure 3 and Figure 4, the filter element structure 100 includes a first filter element 110. The first filter element 110 includes a water adsorption layer 111 and a water blocking layer 112. The water adsorption layer 111 surrounds the water blocking layer 112, and the water blocking layer 112 is used to intercept the water droplets separated from the water adsorption layer 111. Therefore, when the filter element structure 100 is installed in the filter cavity 231 of the engine oil filter, the water in the mixed engine oil will be inhaled by the water adsorption layer 111. Subsequently, the water adsorption layer 111 separates water droplets and intercepts the separated water droplets through the water blocking layer 112, so that the filtered engine oil does not contain water.

[0027] In one embodiment, the water adsorption layer 111 includes molecular sieve. The molecular sieve can adsorb the water in the mixed engine oil and then release the water, that is, separate water droplets. Specifically, when the molecular sieve is in a low-temperature and high-pressure environment, the water molecules absorbed by the molecular sieve move relatively gently, and under this high pressure, the water molecules can be easily "locked" by the pores of the molecular sieve, which makes the molecular sieve have a high water absorption capacity or water content. When the molecular sieve is in a high-temperature and low-pressure environment, the water molecules absorbed by the molecular sieve move more violently, and under this low pressure, the total water absorption capacity of the molecular sieve decreases, so that the molecular sieve releases (separates) water. More specifically, the water adsorption layer 111 further includes a non-woven fabric sleeve, and the non-woven fabric sleeve is generally in a ring structure. Among them, each molecular sieve is coated in the non-woven fabric sleeve.

[0028] In one embodiment, as Figure 4 shown, the water blocking layer 112 is a water blocking filter screen that is generally formed in a cylindrical shape. The molecular sieve surrounds the outside of the water blocking filter screen. Specifically, when the molecular sieve begins to release (separate) water droplets, the water droplets gradually gather on the water blocking filter screen and can flow downward along the water blocking filter screen.

[0029] See Figure 3 and Figure 4 , in one embodiment, the first filter element 110 further includes a first filter layer 113. The first filter layer 113 surrounds the water adsorption layer 111 and is used to intercept particulate impurities. In this way, the mixed engine oil first passes through the first filter layer 113 to remove particulate impurities and then passes through the water adsorption layer 111 to absorb water. This can not only make the filtered engine oil free of particulate impurities and water, but also ensure the cleanliness of the water adsorption layer 111 by first using the first filter layer 113 to remove particulate impurities, avoiding the adsorption of particulate impurities on the water adsorption layer 111 and affecting its water adsorption and release effect. It should be noted that the first filter element 110 is made of a hydrophilic material, which allows water to pass through.

[0030] In one embodiment, the first filter layer 113 is a cylindrical shape formed by folding filter paper, that is, the first filter layer 113 is formed by folding and rolling filter paper on the circumferential outer side of the water adsorption layer 111.

[0031] SeeFigure 4 , in one embodiment, the first filter element 110 further includes a first central tube 114. The first central tube 114 is inserted inside the water-blocking layer 112, that is, inside the cylindrical water-blocking filter screen. In this way, along the radial direction of the first central tube 114, the water-blocking layer 112, the water adsorption layer 111, and the first filter layer 113 are sequentially arranged around the first central tube 114. Thus, the structural strength of the first filter element 110 can be improved. Specifically, the tube wall of the first central tube 114 is provided with first oil holes 1141, and the first oil holes 1141 communicate with the inner cavity of the first central tube 114. There are multiple first oil holes 1141, and the multiple first oil holes 1141 can be arranged along the axial direction of the first central tube 114 and at axial intervals. In this way, under the filtering action of the first filter layer 113, the water adsorption layer 111, and the water-blocking layer 112, relatively pure engine oil can enter the inner cavity of the first central tube 114 through the first oil holes 1141 for discharge into the engine.

[0032] See Figure 3 and Figure 4 , in one embodiment, the first filter element 110 further includes a first upper end cap 115 and a first lower end cap 116. The water adsorption layer 111, the water-blocking layer 112, and the first filter layer 113 are all clamped between the first upper end cap 115 and the first lower end cap 116. This helps to further improve the structural strength of the first filter element 110 and also improves the overall installation convenience of the first filter element 110.

[0033] Continue to refer to Figure 3 and Figure 4 , in one embodiment, the filter element structure 100 further includes a second filter element 120. The second filter element 120 is stacked with the first filter element 110 up and down.

[0034] It should be noted that the first filter element 110 and the second filter element 120 being stacked up and down includes two implementation manners: the first filter element 110 is located above the second filter element 120; or, the second filter element 120 is located above the first filter element 110. Specifically, in this embodiment, the second filter element 120 is located above the first filter element 110.

[0035] Specifically, in one embodiment, as Figure 3 and Figure 4As shown, the second filter element 120 includes a second central tube 121 and a second filter layer 122. Among them, the second filter layer 122 is disposed around the second central tube 121 and is used to intercept particulate impurities. Specifically, the second filter layer 122 is a hollow cylindrical structure with both ends penetrating. The second filter layer 122 is formed by folding and rolling a filter paper along the outer circumference of the second central tube 121. The second central tube 121 is used to support the second filter layer 122, improving the structural strength of the second filter element 120. More specifically, the second oil holes 1121 are provided on the tube wall of the second central tube 121, and the second oil holes 1121 communicate with the inner cavity of the second central tube 121. There are multiple second oil holes 1211, and the multiple second oil holes 1211 can be arranged at intervals along the axial direction of the second central tube 121. In this way, under the filtering action of the second filter layer 122, the engine oil without particulate impurities can enter the inner cavity of the second central tube 121 from the second oil holes 1211 for discharge into the engine.

[0036] Continue to refer to Figure 3 and Figure 4 In an embodiment, the second filter element 120 further includes a second upper end cap 123 and a second lower end cap 124. The second central tube 121 and the second filter layer 122 are both clamped between the second upper end cap 123 and the second lower end cap 124. In this way, it helps to further improve the structural strength of the second filter element 120 and is also convenient for installation.

[0037] In this embodiment, as Figure 3 and Figure 4 shown, the second filter element 120 is disposed above the first filter element 110, and the second lower end cap 124 of the second filter element 120 is connected to the first upper end cap 115 of the first filter element 110. Optionally, the second lower end cap 124 and the first upper end cap 115 are connected by a detachable connection method. Or, the second lower end cap 124 and the first upper end cap 115 are connected by a fixed connection method, such as infrared welding, etc.

[0038] Specifically, as Figure 4 shown, in this embodiment, the first upper end cap 115 is provided with a first through hole 1151, the first lower end cap 116 is provided with a second through hole 1161, and both the first through hole 1151 and the second through hole 1161 communicate with the inner cavity of the first central tube 114. The second upper end cap 123 is provided with a first perforation 1231, the second lower end cap 124 is provided with a second perforation 1241, and both the first perforation 1231 and the second perforation 1241 communicate with the inner cavity of the second central tube 121. More specifically, when the second lower end cap 124 is connected to the first upper end cap 115, the first through hole 1151 and the second perforation 1241 are opposite and communicate with each other. In this way, the inner cavity of the first central tube 114 can be communicated with the inner cavity of the second central tube 121.

[0039] When the above-mentioned filter element structure 100 is placed in the housing 200, the mixed engine oil introduced into the housing 200, that is, the engine oil containing particulate impurities and water, a part of it will be filtered by the second filter element 120, so that the engine oil without particulate impurities but containing moisture can enter the inner cavity of the second central tube 121; and another part will be filtered by the first filter element 110, so that the relatively pure engine oil, that is, the engine oil without moisture and particulate impurities, can enter the inner cavity of the first central tube 114 and finally be discharged through the second through hole 1161 for lubricating the engine. In addition, since a part of the mixed engine oil introduced into the housing 200 is filtered by the second filter element 120, and the second filter element 120 only filters particulate impurities, and another part is filtered by the first filter element 110, and the first filter element 110 can filter both particulate impurities and water, the two cooperate for filtering, which can not only effectively filter out particulate impurities and part of the water, ensure the filtering effect while reducing the flow resistance of the fluid and improving the filtering efficiency.

[0040] See Figure 1 and Figure 2 As shown in, in an embodiment, the housing 200 includes a bottom shell 210 and an upper cover 220 each having a chamber, and the two are enclosed and connected to seal the two chambers to form an installation cavity 230, and the filter element structure 100 is installed in the installation cavity 230. Specifically, the connection manner between the upper cover 220 and the bottom shell 210 includes but is not limited to snap connection, threaded connection, etc. More specifically, a first sealing ring is also provided at the connection between the two, so that the mixed engine oil introduced into the installation cavity 230 of the housing 200 can be prevented from overflowing from the gap at the connection between the upper cover 220 and the bottom shell 210.

[0041] In an embodiment, the housing 200 is provided with an oil inlet 201, an oil outlet 202 and a drain outlet 203, and all three are communicated with the installation cavity 230. Among them, the oil inlet 201 is used for introducing the mixed engine oil to be filtered, the oil outlet 202 is used for discharging the purified engine oil, and the drain outlet 203 is used for discharging the filtered water.

[0042] See Figure 2, in one embodiment, the radial dimension of the second lower end cover 124 is adapted to the radial dimension of the housing 200. In this way, the second lower end cover 124 can partition the installation cavity 230 of the housing 200 to form a filtration cavity 231 and a water storage cavity 232. For example, when the housing 200 is generally in a cylindrical structure, the second lower end cover 124 is generally in a circular structure. At this time, the diameter of the second lower end cover 124 is adapted to the inner diameter of the housing 200. In this way, the filter element structure 100 can be stably arranged in the housing 200. Specifically, the first filter element 110 and the second filter element 120 are located in the filtration cavity 231, the oil inlet 201 is communicated with the filtration cavity 231, the water storage cavity 232 is communicated with the drain port 203, and the oil outlet 202 is communicated with the second through hole 1161. More specifically, the second lower end cover 124 is provided with water filter holes (not shown in the figure), and the water filter holes communicate the filtration cavity 231 and the water storage cavity 232. In this way, when the mixed engine oil enters the filtration cavity 231 from the oil inlet 201, a part of the mixed engine oil will be filtered by the second filter element 120 to filter out particulate impurities; at the same time, another part of the mixed engine oil will be filtered by the first filter element 110 to filter out particulate impurities and water one by one, and the filtered water will enter the water storage cavity 232 through the water filter holes and be discharged from the drain port 203.

[0043] In one embodiment, the water filter holes are located below the water adsorption layer 111 and the water blocking layer 112. In this way, it helps the precipitated water to quickly enter the water storage cavity 232 through the water filter holes.

[0044] See Figure 1 and Figure 2 , in one embodiment, the oil inlet 201 is located on the side wall of the housing 200 and is oppositely arranged with respect to the connection part of the first filter element 110 and the second filter element 120. In this way, a part of the mixed engine oil entering from the oil inlet 201 will automatically flow to the first filter element 110 for filtration, and another part of the engine oil will automatically flow to the second filter element 120 for filtration, so that both the first filter element 110 and the second filter element 120 can filter the mixed engine oil simultaneously.

[0045] See Figure 2 and Figure 4 , in one embodiment, a second sealing ring 130 is abutted between the second lower end cover 124 and the inner wall of the housing 200. In this way, it can prevent the mixed engine oil to be filtered in the filtration cavity 231 from entering the water storage cavity 232.

[0046] See Figure 2 and Figure 4, in one embodiment, a bypass valve 140 is provided on the second upper end cap 123. Specifically, the bypass valve 140 is installed at the first through hole 1231, so that the bypass valve 140 can communicate the inner cavity of the second central tube 121 and the filtration cavity 231. When the first filter element 110 and the second filter element 120 are blocked, the bypass valve 140 can be opened, so that the mixed engine oil directly enters the first central tube 114 and the second central tube 121 from the bypass valve 140 and is discharged from the oil outlet 202, ensuring the normal supply of engine oil.

[0047] The working principle of the engine oil filter 1000 in the present application will be described below in conjunction with Figures 1 to 4 illustrate.

[0048] When the engine oil filter 1000 needs to be used, the mixed engine oil to be filtered is directly introduced into the oil inlet 201. When the mixed engine oil enters the oil inlet 201, a part of the engine oil flows to the second filter layer 122. At the same time, another part of the engine oil will flow to the first filter layer 113. Among them, the mixed engine oil flowing to the second filter layer 122 is filtered by the second filter layer 122, and the particulate impurities in the engine oil are intercepted, so that the engine oil entering the second central tube 121 does not contain particulate impurities. The mixed engine oil flowing to the first filter layer 113 is filtered by the first filter layer 113, and the impurities in the engine oil are intercepted. While purifying the engine oil, it also avoids the situation that the water adsorption layer 111 is blocked by impurities entering it. More specifically, when the engine starts to run, the temperature of the mixed engine oil introduced into the filtration cavity 231 is low, so that the filter element structure 100 is in a low-temperature and high-pressure environment. At this time, the engine oil filtered by the first filter layer 113 flows to the water adsorption layer 111 (molecular sieve), and the water adsorption layer 111 (molecular sieve) can absorb a large amount of water molecules. After the engine runs for a period of time, the temperature of the mixed engine oil discharged from the engine rises, which reduces the viscosity of the engine oil. Thus, when such engine oil is introduced into the filtration cavity 231, the temperature of the filter element structure 100 rises, and the pressure outside the filter element structure 100 decreases. Since the water absorption rate of the water adsorption layer 111 (molecular sieve) in a low-temperature and high-pressure environment is greater than that in a high-temperature and low-pressure environment, when the water adsorption layer 111 (molecular sieve) is in a high-temperature and low-pressure environment, the water adsorption layer 111 (molecular sieve) will release and precipitate the water absorbed in excess. And when precipitating, the water molecules gradually gather to form large water droplets, which are intercepted by the water blocking layer 112 (water blocking filter screen) and fall to the first lower end cap 116 and enter the water storage cavity 232 through the water filtering holes. In this way, the engine oil entering the first central tube 114 through the first filter element 110 does not contain particulate impurities and water.

[0049] In the engine oil filter 1000 of this embodiment, the first filter element 110 and the second filter element 120 cooperate to filter the mixed engine oil to be filtered simultaneously. During the filtering process, the first filter element 110 and the second filter element 120 are equivalent to filtering the mixed engine oil simultaneously in a "parallel" manner. Since a part of the engine oil is filtered by the second filter element 120, the second filter element 120 (the second filter layer 122) is used to adsorb particulate impurities, while another part of the engine oil is filtered by the first filter element 110. The first filter element 110 (the first filter layer 113, the water adsorption layer 111 and the water blocking layer 112) is used to remove particulate impurities and water. In this way, while effectively filtering particulate impurities, part of the water in the mixed engine oil can also be removed, reducing the moisture content in the mixed engine oil and ensuring the filtering effect. In addition, precisely because the second filter element 120 (the second filter layer 122) only filters particles, the flow resistance of the fluid in the filter chamber 231 can be reduced, the overall filtering efficiency of the filtering structure can be improved, and the influence of excessive flow resistance on the filtering efficiency and ultimately on the operating conditions of the engine can be avoided.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0051] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A filter element structure, characterized in that, Comprising: A first filter element, the first filter element includes a water adsorption layer and a water blocking layer, the water adsorption layer is disposed around the water blocking layer, and the water blocking layer is used to intercept the water droplets precipitated from the water adsorption layer.

2. The filter element structure according to claim 1, wherein, The water adsorption layer includes a part composed of molecular sieve.

3. The filter element structure according to claim 2, wherein, The water adsorption layer further includes a non-woven fabric sleeve, and the molecular sieve is accommodated in the non-woven fabric sleeve.

4. The filter element structure according to claim 1, characterized in that, The first filter element further includes a first filter layer, the first filter layer is disposed around the water adsorption layer and is used to intercept particulate impurities.

5. The filter element structure according to claim 4, characterized in that The first filter element further includes a first central tube. Along the radial direction of the first central tube, the water blocking layer, the water adsorption layer, and the first filter layer are sequentially disposed around the first central tube; And / or, the first filter element further includes a first upper end cap and a first lower end cap, and the water adsorption layer, the water blocking layer, and the first filter layer are all clamped between the first upper end cap and the first lower end cap.

6. The filter element structure according to any one of claims 1-5, characterized in that, The filter element structure further includes a second filter element, and the second filter element is stacked with the first filter element up and down.

7. The filter element structure according to claim 6, wherein, The second filter element includes a second central tube and a second filter layer, the second filter layer is disposed around the second central tube and is used to intercept particulate impurities.

8. The filter element structure according to claim 7, characterized in that The second filter element further includes a second upper end cap and a second lower end cap, and the second central tube and the second filter layer are all clamped between the second upper end cap and the second lower end cap.

9. The filter element structure according to claim 8, characterized in that, The filter element structure further includes a bypass valve. A first through hole is provided on the second upper end cap, the first through hole is communicated with the inner cavity of the central tube, and the bypass valve is installed at the first through hole.

10. An oil filter, characterized in that, Comprising: A housing and the filter element structure according to any one of claims 1-9, and the filter element structure is disposed in the housing.

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