CN210021342U - Filter - Google Patents

Abstract

The utility model provides a filter, which comprises a shell and a filter medium; the shell is provided with a fluid inlet and a fluid outlet; the filter media is disposed inside the housing and separates the fluid inlet and the fluid outlet; the filter medium comprises a first filter medium and a second filter medium, the filtration precision of the first filter medium is smaller than that of the second filter medium, the first filter medium is arranged at the upstream of the second filter medium in the fluid flow direction, and the second filter medium is provided with a first through hole. The filter has the advantages of good filtering effect, long service life and low manufacturing and maintenance cost.

Description

Filter

Technical Field

The utility model relates to a filter.

Background

Filters are widely used in transmissions of vehicles for filtering oil in the transmission (e.g., a transmission) to remove impurities present in the oil, thereby ensuring lubrication efficiency of the oil. In the conventional filter, the filtration accuracy of the filter medium located upstream is greater than that of the filter medium located downstream in the oil flow direction, and therefore, the flow resistance of the upstream filter medium to the oil is also greater. Under the pressure of the oil flow, the upstream filter medium is pressed against the adjacent downstream filter medium, so that the two are attached together. Furthermore, since the upstream filter medium has a high filtration accuracy, the upstream filter medium is easily clogged in use, which may cause a gradual increase in the flow resistance of the oil, making it difficult for the oil to pass through the filter medium, resulting in a loss of the filter effect of the filter medium. In the prior art, to alleviate the above problems, a spacer member is generally disposed between adjacent filter media to prevent the adjacent filter media from being attached to each other. However, the spacer element does not completely solve the above problem, and the upstream filter medium is still prone to clogging, which may affect the filtering effect of the filter and adversely affect the operation of the vehicle transmission. At this time, the filter must be repaired or replaced, which further increases the maintenance cost of the vehicle.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a filter having a good filtering effect, a long service life, and low manufacturing and maintenance costs.

In order to achieve the above object, the present invention provides a filter including a housing and a filter medium; the shell is provided with a fluid inlet and a fluid outlet; the filter media is disposed inside the housing and separates the fluid inlet and the fluid outlet; the filter medium comprises a first filter medium and a second filter medium, the filtration precision of the first filter medium is smaller than that of the second filter medium, the first filter medium is arranged at the upstream of the second filter medium in the fluid flow direction, and the second filter medium is provided with a first through hole.

The utility model provides an in the filter, because the filter fineness of setting at the first filter medium of fluid flow direction upper reaches is lower, that is to say, this first filter medium's filter gap is great, when the fluid passes through this first filter medium, the difficult filter gap who blocks up this first filter medium of impurity in the fluid. Furthermore, since the first filter medium is not easily clogged, the first filter medium is not easily attached to the second filter medium by the flow pressure of the fluid. Therefore, on one hand, the filter medium is not easy to be blocked by impurities, so that the service life of the filter is prolonged while the filtering effect is ensured; on the other hand, an additional spacer is not required to be arranged between the adjacent first filter medium and the second filter medium, so that the manufacturing cost of the filter is reduced; therefore, according to the utility model discloses a filter effect is good, long service life and make and the maintenance cost is low.

In one embodiment, the filter medium further comprises a third filter medium, the filtration precision of the third filter medium is greater than that of the second filter medium, the third filter medium is arranged at the downstream of the second filter medium, the third filter medium is provided with a second through hole, and the third filter medium is used in certain fluid environments (such as an automatic transmission of a high-grade automobile) which are extremely sensitive to impurities and is used for filtering extremely small impurity particles.

In one embodiment, the second through hole is offset from the first through hole.

In one embodiment, the second through hole is disposed concentrically with the first through hole.

In one embodiment, the second through hole has a smaller aperture than the first through hole.

In one embodiment, the housing comprises a first housing and a second housing which are oppositely arranged, the first housing and the second housing enclose a filter chamber, at least one fluid inlet is arranged on the first housing, and at least one fluid outlet is arranged on the second housing.

In one embodiment, the fluid inlet is disposed proximate a first side edge of the housing and the fluid outlet is disposed proximate a second side edge of the housing opposite the first side edge.

In one embodiment, the filter further comprises a support mesh disposed within the filter cavity inside the housing and configured to support a downstream-most one of the filter media. The most downstream filter medium is the filter medium with the highest filtration accuracy in the filter, and the filter gap is also the smallest, so that it is possible to fit against the inner wall of the filter chamber under the influence of the flow pressure of the fluid. If this occurs, it is difficult for the fluid to continue to be filtered through the filter media, and the filter media will lose its normal filtration capacity. The support screen prevents this and ensures that the filter medium located furthest downstream is able to function properly.

In one embodiment, the first filter medium is a filter screen.

In one embodiment, the material of the second filter media is a fibrous material.

In one embodiment, the material of the third filter media is a fibrous material.

In one embodiment, the filter is an oil filter.

In the filter, in the flowing direction of the fluid, the filtering precision of the filtering medium is sequentially increased, and the impurities in the fluid are gradually filtered; the upstream filter medium is not easy to be blocked by impurities, and a spacer is not required to be arranged; therefore, the filter effect and the service life of the filter are ensured, and the manufacturing and maintenance cost of the filter is reduced.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a cross-sectional view of a filter in an embodiment of the invention;

fig. 2 is an exploded view of a filter in an embodiment of the invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, according to a filter 100 of an embodiment of the present invention, the filter 100 includes a housing 110 and a filter medium 120. Wherein the housing has a filter cavity 150 therein, at least one fluid inlet 1110 is provided at the bottom of the housing 110 near the first side edge 130, and at least one fluid outlet 1120 is provided at the top of the housing 100 near the second side edge 140. It should be understood that the number and positions of the fluid inlets 1110 and the fluid outlets 1120 are exemplary, and the number and positions of the fluid inlets 1110 and the fluid outlets 1120 can be set to any suitable number and positions according to the following principle: fluid inlet 1110, filter cavity 150, and fluid outlet 1120 require passageways capable of establishing fluid flow. Preferably, the fluid inlet 1110 and the fluid outlet 1120 are respectively disposed on opposite sides of the housing 110 and are respectively adjacent to opposite sides of the housing 110.

Referring to fig. 1 and 2 together, the housing 110 of the filter 100 according to an embodiment of the present invention includes a first housing 111 and a second housing 112, wherein a fluid inlet 1110 is provided on the first housing 111 near the first side edge 130; the fluid outlet 1120 is disposed on the second housing 112 proximate the second side edge 140; the first housing 111 and the second housing 112 are joined together to form the filter cavity 150, wherein the fluid inlet 1110 and the fluid outlet 1120 are in fluid communication with the filter cavity 150. Fluid to be filtered enters filter cavity 150 for filtering through fluid inlet 1110 and exits through fluid outlet 1120.

In the present embodiment, in the filter chamber 150, the first filter medium 121, the second filter medium 122 and the third filter medium 123 are sequentially disposed along the flow direction of the fluid to filter the fluid layer by layer. That is, in the flow direction of the fluid, the first filter medium 121 is located upstream of the second filter medium 122, and the second filter medium 122 is located upstream of the third filter medium 123. The filtering accuracy of the first filter medium 121 is minimized; the filtration precision of the second filter medium 122 is greater than that of the first filter medium 121, and the second filter medium 122 is provided with a plurality of first through holes 1220, the first through holes 1220 are used for enabling filtered fluid to pass through the second filter medium 122 more easily, and preventing the second filter medium 122 from being attached to a downstream filter medium under the action of fluid flow pressure; the filtering precision of the third filtering medium 123 is greater than that of the second filtering medium 123, the third filtering medium 123 is provided with a plurality of second through holes 1230, and the second through holes 1230 have a function similar to that of the first through holes 1220, so that the filtered fluid can more easily pass through the third filtering medium 123, and the third filtering medium 123 is prevented from being attached to the inner surface of the second housing 112 under the action of the fluid flow pressure. Preferably, the aperture of the second through hole is smaller than that of the first through hole, so as to increase the filtering area of the third filtering medium 123, ensure the filtering effect of the third filtering medium 123, and improve the filtering efficiency.

In this embodiment, the first through holes 1220 of the second filter medium 122 are disposed concentrically with the second through holes 1230 of the third filter medium 123 to reduce the flow resistance when the fluid passes through the second filter medium 122 and the third filter medium 123, further preventing the third filter medium 123 from adhering to the inner surface of the second housing 112 under the pressure of the fluid flow. Optionally, in other embodiments, the first through hole 1220 and the second through hole 1230 may also be disposed in an offset manner, so that the fluid passing through the first through hole 1220 and reaching the third filter medium 123 does not directly pass through the second through hole 1230 and flows out of the third filter medium 123, but must be filtered by the third filter medium 123 and then can pass through the third filter medium 123, thereby further ensuring the filtering effect and improving the filtering efficiency. In this embodiment, the first filter medium 121 is a filter net, and the material thereof may be, for example, a hard material with relatively high strength, such as metal or plastic. The edge of the first filter medium 121 may be, for example, caught between the first case and the second case. Preferably, the first filter medium 121 may support the second filter medium 122. The second filter medium 122 may be made of a fibrous material having a relatively low strength, such as paper, woven fabric, or nonwoven fabric, and the third filter medium 123 may be made of a fibrous material having a relatively low strength, such as paper, woven fabric, or nonwoven fabric, similar to the second filter medium 122. Preferably, the third filter medium 123 may be used in certain fluid environments that are extremely sensitive to contaminants (e.g., automatic transmissions for high-end vehicles) to filter out extremely small contaminant particles. Therefore, it should be understood that the third filter media 123 is not required, and the third filter media 123 may be omitted if the filtration accuracy of the second filter media 122 is already sufficient for the filtration.

In this embodiment, the filter 100 further includes a support net (not shown) disposed in the filter chamber 150 near the inner wall of the second housing 112 for supporting the most downstream filter medium of the filter media to prevent the most downstream filter medium from adhering to the inner wall of the housing. In this embodiment, the support net is used to support the third filter medium 123 so as to prevent the third filter medium 123 from adhering to the inner wall of the second housing.

In operation of a filter according to embodiments of the present invention, first, fluid to be filtered (e.g., engine oil) flows into filter cavity 150 from fluid inlet 1110; then, the fluid to be filtered passes through the first filter medium 121 for a first filtering, in which impurities with larger particles are filtered; thereafter, the fluid to be filtered is passed through a second filter media 122 for a second filtration wherein relatively small particulate impurities are filtered out; then, the fluid to be filtered flows through the third filter medium 123 to be filtered for the third time, wherein the impurities with extremely small particles are filtered out, and thus, the fluid is filtered; finally, the filtered fluid exits through fluid outlet 1120. Because the first filter medium 121 is a filter net with high strength and low filtering precision, on one hand, the first filter medium 121 itself can bear the pressure generated by the fluid flow to the first filter medium and is not easy to deform, and on the other hand, the filter gap of the first filter medium 121 is large and is not easy to be blocked by the magazine particles, so that the first filter medium 121 cannot be pressed to and attached to the adjacent second filter medium 122 due to the fluid flow pressure. During filtration, the first filter medium 121 may also support the second filter medium 122, which further ensures that the first filter medium does not adhere to the second filter medium 122 due to the flow pressure of the fluid. In this embodiment, the supporting net supports the third filter medium 123, so that the third filter medium 123 does not adhere to the inner wall of the second housing 112 due to the pressure generated by the fluid flow, thereby ensuring the filtering effect of the third filtering. Thus, on the one hand, the first filter medium 121 can be made less prone to be clogged with impurities, thereby extending the service life of the filter 100 while ensuring the filtering effect of the filter 100; on the other hand, an additional spacer member does not need to be provided between the adjacent first and second filter media 121 and 122, thereby saving the manufacturing and maintenance costs of the filter 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (12)

1. A filter, comprising a housing and a filter media; the shell is provided with a fluid inlet and a fluid outlet; the filter media is disposed inside the housing and separates the fluid inlet and the fluid outlet; the filter medium comprises a first filter medium and a second filter medium, the filtration precision of the first filter medium is smaller than that of the second filter medium, the first filter medium is arranged at the upstream of the second filter medium in the fluid flow direction, and the second filter medium is provided with a first through hole.

2. The filter of claim 1, wherein the filter media further comprises a third filter media having a filtration fineness greater than the filtration fineness of the second filter media, the third filter media being disposed downstream of the second filter media, the third filter media having second through-holes disposed therein.

3. The filter of claim 2, wherein the second through-hole is offset from the first through-hole.

4. The filter of claim 2, wherein the second through-hole is disposed concentrically with the first through-hole.

5. The filter of any one of claims 2 to 4, wherein the second through holes have a smaller pore size than the first through holes.

6. A filter as claimed in any one of claims 1 to 4, wherein the housing comprises first and second oppositely disposed housings enclosing a filter chamber, at least one fluid inlet being provided in the first housing and at least one fluid outlet being provided in the second housing.

7. The filter of claim 6, wherein the fluid inlet is disposed proximate a first side edge of the housing and the fluid outlet is disposed proximate a second side edge of the housing opposite the first side edge.

8. The filter of any one of claims 1 to 4, further comprising a support mesh disposed within a filter cavity inside the housing and configured to support the filter media furthest downstream of the filter media.

9. The filter of any one of claims 1 to 4, wherein the first filter media is a filter screen.

10. The filter of any one of claims 1 to 4, wherein the second filter media is a fibrous material.

11. The filter of any of claims 2-4, wherein the material of the third filter media is a fibrous material.

12. A filter according to any one of claims 1 to 4, wherein the filter is an oil filter.

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