Filter element device and filter comprising same

Abstract

The filter element device comprises a cylindrical filter element main body, the outer side of the peripheral wall of the filter element main body is constructed as an inlet side, the inner cavity side of the filter element main body is constructed as an outlet side, and a first end opening of the filter element main body is constructed as an outlet; the blocking indicator is arranged at the second end of the filter element main body and comprises an indicating cylinder communicated with the filter element main body and a floating piece arranged in the indicating cylinder in an axial movement mode, and the peripheral wall of the floating piece is connected with the indicating cylinder in a movement sealing mode; the first end face of the floating piece is communicated with the inner cavity of the filter element main body, the second end face of the floating piece is communicated with the outside, and the floating piece is configured to float from the second end of the indicating cylinder to the first end of the indicating cylinder after the pressure difference borne by the floating piece exceeds a threshold value; the filter element device indicates whether the filter element main body needs to be replaced or cleaned or not through the position of the floating piece in the indicating cylinder.

Description

Technical Field

[0001] This utility model belongs to the field of air purification technology, specifically relating to a filter element device and a filter containing the same. Background Technology

[0002] Pneumatic systems use compressed air as their working medium. In a pneumatic system, an air compressor compresses air to supply downstream pneumatic actuators. The compressed air output from the air compressor contains a large amount of moisture, oil, and dust, which can contaminate the pneumatic system, especially the pneumatic actuators. Furthermore, impurities can be introduced during the piping installation process, similarly causing internal contamination. More than 80% of pneumatic failures are caused by poor compressed air quality, making air filters crucial for treating the compressed air. The filter element is the core component of the filter. The filter element filters and separates impurities and contaminants that may be present in the compressed air, obtaining compressed air quality suitable for actual use requirements.

[0003] However, over time, filter elements accumulate impurities and become clogged, which can lead to flow loss and reduced efficiency in the pneumatic system, affecting its performance.

[0004] Therefore, it is necessary to design a filter cartridge device and a filter containing it to provide feedback on the usage status of the filter cartridge. Utility Model Content

[0005] To address some or all of the aforementioned technical problems in the prior art, this utility model proposes a filter element device and a filter containing the same. This filter element device can provide feedback on the clogging status of the filter element, allowing users to promptly understand its usage and facilitating timely replacement and cleaning.

[0006] According to one aspect of the present invention, a filter element device is provided, comprising:

[0007] The filter element body is cylindrical, with the outer periphery of the filter element body forming the inlet side and the inner cavity forming the outlet side. The first end opening of the filter element body forms the outlet.

[0008] A blockage indicator is provided at the second end of the filter element body. The blockage indicator includes an indicator cylinder that is connected to the filter element body and a floating member that is axially movable inside the indicator cylinder. The outer peripheral wall of the floating member is movably and sealingly connected to the indicator cylinder. The first end face of the floating member is connected to the inner cavity of the filter element body, while the second end face of the floating member is connected to the outside. The floating member is configured to float from the second end of the indicator cylinder to the first end of the indicator cylinder when the pressure difference experienced by the floating member exceeds a threshold.

[0009] In one instance, at least the first end segment of the indicator tube is constructed as a transparent tube.

[0010] In one example, the indicator tube is configured as a split tube and includes a first split tube and a second split tube located at the second end of the first split tube, the first split tube being configured as a transparent tube.

[0011] In one example, limiting members are respectively provided in the inner cavity of the first split cylinder and the inner cavity of the second split cylinder, the limiting members being used to limit the axial position of the floating member within the indicator cylinder.

[0012] In one example, the limiting member is constructed as a ring, the outer wall of which abuts against the inner wall of the indicator cylinder.

[0013] In one example, a limiting rod is provided on at least one of the annular members, with both ends of the limiting rod connected to the inner wall of the annular member.

[0014] In one example, a sealing ring is embedded in the outer wall of the floating component, the sealing ring being located between the floating component and the indicator cylinder.

[0015] In one example, the indicator tube is bonded to the filter element body.

[0016] In one example, the indicator cylinder is made of one of the following materials: polymethyl methacrylate, polycarbonate, and polyester.

[0017] According to one aspect of the present invention, a filter is provided, including the above-described filter element device.

[0018] Compared with the prior art, the advantages of this utility model are as follows: The filter element device includes a blockage indicator, and a floating element is provided inside the indicator cylinder of the blockage indicator. During operation, the first end face of the floating element is connected to the inner cavity of the filter element body, and receives the pressure of the filtered air in the inner cavity of the filter element body. The second end face of the floating element is connected to the outside, and is used to receive the pressure of the outside air. As impurities accumulate on the filter element body, the pressure acting on the first end face of the floating element will decrease. After exceeding the threshold, the floating element will move under the action of the pressure difference. It can be seen that the filter element device of this application can indicate the blockage status of the filter element, which makes it easy for users to quickly identify whether the filter element device needs to be replaced or cleaned, and helps to ensure the normal operation of the pneumatic system. Attached Figure Description

[0019] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, in which:

[0020] Figure 1A filter element device according to an embodiment of the present invention is shown, wherein the floating element is in its original position;

[0021] Figure 2 For from Figure 1 AA cross-section view;

[0022] Figure 3 A filter element device according to an embodiment of the present invention is shown, wherein the floating element is in a floating position;

[0023] Figure 4 The diagram shows the force distribution on the floating element of a filter cartridge device according to an embodiment of the present invention.

[0024] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0025] To make the technical solution and advantages of this utility model clearer, the exemplary embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] An embodiment of this utility model provides a filter element device. For example... Figures 1 to 4 As shown, the filter element device includes a filter element body 1 and a blockage indicator 2. The filter element body 1 itself has a cylindrical structure. The outer periphery of the filter element body 1 is the inlet side, while the inner cavity side is the outlet side. That is, air passes through the wall of the filter element body 1 from the outside in and enters the inner cavity for air filtration. The first end of the filter element body 1 (at...) Figure 1 The opening (in the middle, consistent with the upper direction) is configured as the outlet 11. A blockage indicator 2 is located at the second end of the filter element body 1 (in...). Figure 1 (In the middle, consistent with the direction of the lower end). Specifically, the blockage indicator 2 includes an indicator cylinder 21 and a floating member 22. The indicator cylinder 21 is connected to the filter element body 1 in a communicating manner and is also cylindrical itself. The floating member 22 is disposed inside the indicator cylinder 21. The floating member 22 can move relative to the indicator cylinder 21 along the axial direction of the indicator cylinder 21. The outer peripheral wall of the floating member 22 is connected to the indicator cylinder 21 in a moving sealing manner. The first end face 23 of the floating member 22 communicates with the inner cavity of the filter element body 1, while the second end face 24 communicates with the outside. The floating member 22 is configured such that when the pressure difference experienced by the floating member 22 exceeds a threshold, it floats from the second end of the indicator cylinder 21 to the first end of the indicator cylinder 21, thereby indicating that the filter element body 1 needs to be replaced or cleaned.

[0027] During the use of this filter element device, air flows from the outside of the filter element body 1 to the inner cavity. The initial pressure of the unfiltered air is P0, and after passing through the wall of the filter element body 1, the filtered air pressure becomes P1. Since the first end face 23 of the floating element 22 is connected to the inner cavity of the filter element body 1, the gas pressure P1 in the inner cavity acts on the first end face 23, generating pressure. At the same time, since the second end face 24 of the floating element 22 is connected to the outside, it is subjected to a force from the air pressure P0. With long-term use of the filter element device, impurities will accumulate on the filter element body 1, and the filtered pressure P1 will decrease. As the filtered pressure P1 decreases, the pressure P1 acting on the first end face 23 decreases relatively, while the initial pressure P0 remains unchanged. Therefore, the floating element 22 will be subjected to a pressure difference. When this pressure difference exceeds a threshold, it can push the floating element 22 to move from the second end to the first end of the indicator cylinder 21, indicating that the filter element body 1 needs to be replaced or cleaned.

[0028] At least one section of the indicator cylinder 21 is constructed as a transparent cylinder. This allows personnel to clearly observe whether the floating element 22 is at the first end. If the floating element 22 is seen at the first end of the indicator cylinder 21, it can be determined that the filter element body 1 needs to be replaced or cleaned.

[0029] In one embodiment, the indicator cylinder 21 is a one-piece structure. For example, the indicator cylinder 21 is a one-piece transparent cylinder. This configuration can reduce production requirements, simplify installation, and reduce production costs. When the indicator cylinder 21 is a one-piece transparent cylinder, a marking can be provided on the outer wall of the indicator cylinder 21. For example, the marking can be a colored linear structure pasted on the outer wall of the first end of the indicator cylinder 21. When the floating member 22 reaches the colored linear structure, it can be determined that the floating member 22 has reached the position indicating that it needs to be cleaned or replaced.

[0030] In another embodiment, the indicator cylinder 21 is configured as a split type, including a first split cylinder 25 and a second split cylinder 26 located at the second end of the first split cylinder 25. The first split cylinder 25 is configured as a transparent cylinder. Configuring the indicator cylinder 21 as a split type facilitates the installation of the floating member 22 into the inner cavity of the indicator cylinder 21. When the indicator cylinder 21 is split, for example, the first split cylinder 25 and the second split cylinder 26 can be connected by adhesive bonding.

[0031] A limiting member 27 is respectively provided in the inner cavity of the first split cylinder 25 and the inner cavity of the second split cylinder 26. The limiting member 27 is used to limit the axial position of the floating member 22 in the indicating cylinder 21. That is to say, the limiting member 27 can prevent the floating member 22 from falling off from the indicating cylinder 21. For example, the limiting member 27 is configured as an annular member. The outer wall of the annular member abuts against the inner wall of the indicating cylinder 21. It is easy to understand that when the indicating cylinder 21 is a split structure, the limiting member 27 can be integrally manufactured and provided on the indicating cylinder 21 for simplifying processing and installation; while when the indicating cylinder 21 is an integral structure, at least one end of the limiting member 27 is a later-installed component for setting the floating member 22 into the indicating cylinder 21, and the limiting member 27 can be set on the indicating cylinder 21 by means such as bonding or threaded connection.

[0032] A limiting rod (not shown in the figure) is provided on at least one of the annular members. Both ends of the limiting rod 28 are respectively connected to the inner wall of the annular member. For example, the limiting rod 28 is a rod passing through the radius of the annular member. Preferably, there are multiple limiting rods 28, which can be distributed in a "×" or "cross" shape. This setting can further ensure the safety of the floating member 22 itself and its stability in the indicating cylinder 21.

[0033] A sealing ring 28 is embedded on the outer wall of the floating member 22. The sealing ring 28 is located between the floating member 22 and the indicating cylinder 21. According to needs, the sealing ring 28 can be one or multiple. The sealing ring 28 can play a sealing role, ensure the purification degree of the purified air, and avoid the leakage of the purified air. The sealing ring 28 is a rubber sealing ring.

[0034] In this application, the filter core body 1 can be made of existing materials such as resin fibers or polyester fibers. The indicating cylinder 21 can be made of one of polymethyl methacrylate (PMMA), polycarbonate (PC), and polyester (PET). Of course, the materials of the filter core body 1 and the indicating cylinder 21 are not limited to the materials listed above and can also be made of other materials. For example, the indicating cylinder 21 is connected to the filter core body 1 by bonding.

[0035] In this application, the threshold value of the set pressure difference is P'. When the pressure difference exceeds this threshold value, the block indicator 2 is triggered to prompt the user to replace the filter core device.

[0036] In one example, the filter core device is placed vertically during operation, with the first end upward and the second end downward. During the design of the block indicator, after knowing the threshold value of the pressure difference, the mass and the end face area of the floating member 22 can be adjusted to meet the use requirements.

[0037] Specifically, P0 is the initial pressure of the unfiltered air; P1 is the pressure of the filtered gas with a pressure drop; P' is the pressure drop value, i.e., the difference between P0 and P1; S is the force-bearing area of ​​the first end face 23 and the second end face 24 of the blockage indicator (for ease of calculation and explanation, the force-bearing areas of the first end face 23 and the second end face 24 are assumed to be the same, both being S); the weight of the floating component 22 is G = m * g.

[0038] During the operation of the filter element device, when the blockage indicator 2 remains in its initial position, i.e., the floating element 22 is in its initial position at the lower end of the indicator cylinder 21, the filter element device is in normal condition. In the critical force condition of the floating element 22, F1 + G = F0 (this assumes that the floating element 22 is not subjected to other forces). It can be seen that F1 = P1*S, and F0 = P0*S, therefore, P1*S + m*g = P0*S. Since P1 = P0 - P', then (P0 - P')S + m*g = P0*S. Further derivation yields S / m = g / P'. Therefore, after defining a custom pressure drop threshold P', for example, based on experience, the pressure drop threshold P' can be from 0.1 MPa to 0.3 MPa, and S / m can be further limited to ensure that the floating element 22 can be triggered under the threshold condition.

[0039] As the pressure drop P' continuously increases, P1 continuously decreases, and the force on F1 also decreases accordingly. G remains constant. When P' is at the threshold, the floating element 22 is in critical equilibrium. As the pressure drop P' continues to increase, the floating element 22 moves and can rise up to the first end, indicating that the filter needs to be replaced. It should be noted that, for ease of calculation, the force on the floating element 22 has been simplified in this calculation.

[0040] The filter element body 1 of this application is equipped with a blockage indicator 2, which can provide a blockage reminder function, simplifying the maintenance process of the filter element device, improving maintenance efficiency, reducing the failure rate, and thus ensuring the stable and reliable operation of the entire pneumatic system. In addition, the indicator cylinder 21 of this application is a transparent cylinder, allowing for a direct view of the position of the floating component 22, facilitating quick identification by the user. Furthermore, the blockage indicator 2 can be adjusted according to customer needs, setting different pressure drop values ​​P' thresholds, providing flexibility to adapt to different working environments and conditions. Moreover, the filter element device of this application has a simple structure and low manufacturing cost.

[0041] This application also relates to filters. Filters include the filter element device described above.

[0042] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and / or modifications falling within the scope of the present invention, and all changes and / or modifications made according to the embodiments of the present invention should be covered within the protection scope of the present invention.

Claims

1. A filter element device, characterized in that, include: The filter element body is cylindrical, with the outer periphery of the filter element body forming the inlet side and the inner cavity forming the outlet side. The first end opening of the filter element body forms the outlet. A blockage indicator is provided at the second end of the filter element body. The blockage indicator includes an indicator cylinder that is connected to the filter element body and a floating member that is axially movable inside the indicator cylinder. The outer peripheral wall of the floating member is movably and sealingly connected to the indicator cylinder. The first end face of the floating member is connected to the inner cavity of the filter element body, while the second end face of the floating member is connected to the outside. The floating member is configured to float from the second end of the indicator cylinder to the first end of the indicator cylinder when the pressure difference experienced by the floating member exceeds a threshold.

2. The filter element device according to claim 1, characterized in that, At least the first end section of the indicator tube is constructed as a transparent tube.

3. The filter element device according to claim 2, characterized in that, The indicator tube is constructed as a split type and includes a first split tube and a second split tube located at the second end of the first split tube. The first split tube is constructed as a transparent tube.

4. The filter element device according to claim 3, characterized in that, Limiting elements are respectively provided in the inner cavity of the first split cylinder and the inner cavity of the second split cylinder, and the limiting elements are used to limit the axial position of the floating element in the indicator cylinder.

5. The filter element device according to claim 4, characterized in that, The limiting member is constructed as a ring, and the outer wall of the ring abuts against the inner wall of the indicator cylinder.

6. The filter element device according to claim 5, characterized in that, A limiting rod is provided on at least one of the annular members, and the two ends of the limiting rod are respectively connected to the inner wall of the annular member.

7. The filter element device according to claim 1, characterized in that, A sealing ring is embedded in the outer wall of the floating component, and the sealing ring is located between the floating component and the indicator cylinder.

8. The filter element device according to claim 1, characterized in that, The indicator cylinder is bonded to the filter element body.

9. The filter element device according to any one of claims 1 to 8, characterized in that, The indicator cylinder is made of one of the following materials: polymethyl methacrylate, polycarbonate, and polyester.

10. A filter, characterized in that, The filter cartridge device includes any one of claims 1 to 9.

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