Dehumidification air filter

Abstract

A dehumidifying air filter relates to the technical field of air filtering devices and comprises a filter shell and a base connector, the filter shell comprises a breathing cap and a transparent shell which are connected up and down, a center rod is arranged in the transparent shell, an annular drying agent cavity is formed between the center rod and the transparent shell, and a plurality of air holes are formed in the lower end of the transparent shell; the upper end and the lower end of the base connector are provided with external thread connectors, an inner hole of the base connector is provided with a circular filter screen, the external thread connector at the upper end of the base connector is in threaded connection with the lower end of the transparent shell, and the external thread connector at the lower end of the base connector is connected with an air port of a gearbox or an oil tank. Internal threads at the upper end of the base connector are connected with threads at the lower end of the center rod to form an air channel. The gear box is reasonable in design, and the problems that in the prior art, solid drying agent particles or shell fragments enter the gear box through fractures, lubricating oil is polluted, and losses are caused are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of air filtration devices, specifically to a dehumidifying air filter. Background Technology

[0002] Lubricating oil in gearboxes or oil tanks can absorb moisture from humid air, affecting its lubrication performance. Therefore, dehumidifying air filters are typically installed at the vent of the oil tank or gearbox. These air filters are usually cylindrical, containing a desiccant and filter element, and are fixed to the vent via a threaded neck connection. However, in the event of maintenance or accidental impact, the cylindrical filter may break off at the neck, allowing desiccant particles or shell fragments to enter the oil tank or gearbox through the break, contaminating the lubricating oil and causing damage. To address this, the strength of the threaded neck connection is usually increased, and nylon material is replaced with metal. However, impurities from other parts broken due to impact can still enter the oil tank or gearbox. Utility Model Content

[0003] The purpose of this invention is to provide a dehumidifying air filter to solve the problem in the prior art where solid desiccant particles or shell fragments enter the oil tank or gearbox through the break, contaminating the lubricating oil and causing losses.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a dehumidifying air filter, including a filter housing and a base connector. The filter housing includes a breathable cap and a transparent shell connected vertically. A central rod is provided inside the transparent shell, and an annular desiccant chamber is formed between the central rod and the transparent shell. Multiple air vents are provided at the lower end of the transparent shell. Both the upper and lower ends of the base connector are provided with external threaded connectors. A circular filter screen is provided in the inner hole of the base connector. The external threaded connector at the upper end of the base connector is threadedly connected to the lower end of the transparent shell. The external threaded connector at the lower end of the base connector is connected to the vent of the gearbox or oil tank. The internal thread at the upper end of the base connector is threadedly connected to the lower end of the central rod to form an air channel.

[0005] Preferably, the base connector includes a hexagonal prism, with a coarse thread at the upper end for connecting to the transparent shell and a fine thread at the lower end.

[0006] Preferably, the base connector has a groove, and the circular filter screen is fitted into the groove.

[0007] Preferably, the size of the circular filter screen is adapted to the groove.

[0008] Preferably, the base connector has an annular stepped surface, and the radius of the circular filter screen is larger than the radius of the lower part of the stepped surface and smaller than the radius of the upper part of the stepped surface.

[0009] Preferably, the circular filter screen is made of stainless steel and has a thickness of 1 to 2.5 mm.

[0010] Preferably, the circular filter screen has an edge-sealed structure and an internal mesh structure.

[0011] Preferably, the circular filter screen has several vent holes with a diameter of less than 2 mm, and the diameter of the vent holes is equivalent to 1 / 3 to 1 / 2 of the average diameter of the desiccant particles filled in the desiccant cavity.

[0012] Preferably, the circular filter screen is further provided with an auxiliary structure, which is a strip structure or a crown structure, to enhance the ventilation effect.

[0013] Preferably, the central rod is elastic.

[0014] Based on the above technical solution, the beneficial effects of this utility model are:

[0015] 1. This application avoids huge losses by installing a circular filter screen inside the base connector to prevent solid desiccant or shell fragments from entering the gearbox and reacting chemically with hydraulic oil or lubricating oil due to accidental entry.

[0016] 2. This application optimizes the manufacturing process of dehumidifying filters through the design of the base connector. The center hole connecting the lower end of the filter housing to the base connector can be of a uniform standard size. The problem of different specifications of air inlets of different gearboxes can be solved by manufacturing base connectors of various specifications.

[0017] 3. This application uses a hot and cold assembly method to assemble the circular filter screen, which simplifies the design and reduces manufacturing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall half-section of Embodiment 1;

[0020] Figure 3 This is a schematic diagram of the base connector structure;

[0021] Figure 4 This is a cross-sectional view of the circular filter screen installation in Example 1;

[0022] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the structure of a circular filter screen;

[0024] Figure 7 This is a schematic diagram of the installation of the circular filter screen in Example 2.

[0025] The markings in the diagram are: 1. Filter housing, 11. Breathing cap, 12. Transparent housing, 13. Desiccant, 14. Vent hole, 15. Center rod, 16. Desiccant chamber, 2. Base connector, 21. Coarse thread, 22. Fine thread, 23. Hexagonal prism, 3. Circular filter screen, 31. Circular filter screen body, 32. Vent hole, 33. Auxiliary structure, 4. Sealing ring. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0028] It should also be noted that, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Changes or adjustments to the relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0029] Example 1

[0030] like Figures 1 to 3 As shown, a dehumidifying air filter includes a filter housing 1, a base connector 2, and a disc-shaped circular filter screen 3. During operation or shutdown, the gearbox experiences temperature changes due to the lubrication process, causing air to enter and exit the gearbox through the vent. Installing this filter at the gearbox vent prevents direct contact between the lubricating oil and the air, thus preventing the absorption of moisture from the air and maintaining the performance of the lubricating oil and the operating efficiency of the gearbox.

[0031] The filter housing 1 is cylindrical and includes a breathing cap 11 and a transparent housing 12 connected vertically. The transparent housing 12 has a central rod 15 inside, and an annular desiccant chamber 16 is formed between the central rod 15 and the transparent housing 12. The breathing cap 11 has an air passage connecting the central rod 15 and the desiccant chamber 16 inside. The lower end of the transparent housing 12 has a central hole with internal threads. The lower end of the transparent housing 12 also has several vent holes 14 for connecting air.

[0032] The desiccant chamber 16 is filled with desiccant 13 particles.

[0033] The base connector 2 is hollow and includes a coarse thread 21, a fine thread 22 and a hexagonal prism 23. The upper end of the hexagonal prism 23 is provided with a coarse thread 21 for connecting to the internal thread of the center hole of the vent hole 14, and the lower end is provided with a fine thread 22 for connecting to the vent of the gearbox or oil tank. Both the coarse thread 21 and the fine thread 22 are external threads.

[0034] Specifically, different sizes of fine-headed 22-thread threads are used to connect the vents of different gearboxes or oil tanks.

[0035] In this embodiment, the upper part of the inner hole of the base connector 2 is provided with an internal thread section, and the lower end of the center rod 15 is provided with an external thread section. The base connector 2 and the lower end of the center rod 15 are threadedly connected to form an air channel.

[0036] When air enters the gearbox, it enters the filter through the small hole on the vent 14, passes through the desiccant chamber 16 where the moisture is absorbed by the desiccant 13 particles, and then enters the breathing cap 11. From there, it enters the central rod 15 through the internal air passage of the breathing cap 11, and finally enters the gearbox through the base connector 2. When air exits the gearbox, the direction is reversed.

[0037] like Figure 4 and Figure 5 As shown, the inner hole of the base connector 2 has a groove, and the circular filter screen 3 is fitted into the groove. The size of the circular filter screen 3 is adapted to the groove. The method of assembling the circular filter screen 3 into the groove includes, but is not limited to, the hot and cold method.

[0038] In this embodiment, the circular filter screen 3 is assembled into the groove using a hot and cold method. The assembly process is as follows: the base connector 2 is immersed in hot water at 80-100°C for 1-3 minutes, the circular filter screen 3 is placed in liquid nitrogen for 3-5 minutes, and after being taken out, the circular filter screen 3 is assembled into the groove. Then, the base connector 2 is connected to the center hole at the lower end of the transparent shell 12.

[0039] A sealing ring 4 is provided at the connection between the fine thread 22 and the hexagonal prism 23. The sealing ring 4 is used to improve the sealing performance of the connection between the base joint 2 and the gearbox and prevent air leakage at the connection.

[0040] The circular filter 3 includes a circular filter body 31, vent holes 32, and auxiliary structures 33. The circular filter 3 has an edge-sealed structure and an internal mesh structure. The circular filter 3 is made of stainless steel and has a thickness of 1–2.5 mm. The circular filter body 31 has several vent holes 32, each with a diameter less than 2 mm. The average diameter of the dried particles is greater than 3 mm. The diameter of the vent holes 32 is 1 / 3 to 1 / 2 of the average diameter of the desiccant particles, effectively preventing the dried particles from accidentally falling into the gearbox.

[0041] The circular filter screen 3 is provided with an auxiliary structure 33, which is a strip-shaped or crown-shaped structure, used to enhance the ventilation effect. Specifically, when desiccant particles accidentally fall onto the circular filter screen 3, the auxiliary structure 33 supports the desiccant particles, ensuring normal ventilation through the vent holes 32. In this embodiment, the auxiliary structure 33 is set in a crown shape, such as... Figure 6 As shown.

[0042] The central rod is elastic and has a robust structure made of special materials. It will not break under stress and can be bent, which can effectively prevent the dry particles from falling into the gearbox or oil tank due to the central rod breaking after the filter is subjected to accidental impact.

[0043] Example 2

[0044] like Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that:

[0045] The base connector 2 has an annular stepped surface inside. The upper part of the stepped surface is the internal thread section of the base connector 2, and the lower part of the stepped surface is the non-threaded section of the base connector 2. The radius of the circular filter screen 3 is larger than the radius of the lower part of the stepped surface and smaller than the radius of the upper part of the stepped surface. That is, the radius of the circular filter screen 3 is larger than the radius of the non-threaded section of the base connector 2 and smaller than the radius of the internal thread section of the base connector 2.

[0046] In this embodiment, to save assembly costs, an alternative assembly method is adopted, namely, the circular filter screen 3 is placed between the central rod 15 and the base connector 2. During assembly, the circular filter screen 3 is inserted from the upper end of the base connector 2, and then the central rod 15 is screwed into the base connector 2. The lower end of the central rod 15 is threadedly connected to the base connector 2. When the central rod 15 is screwed to the bottom, the circular filter screen 3 is pressed between the central rod 15 and the base connector 2, making it less prone to loosening and preventing desiccant particles from falling into the gearbox or oil tank.

[0047] The other structural designs are the same as in Embodiment 1, and will not be described again.

[0048] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A dehumidifying air filter, characterized in that: Includes a filter housing (1) and a base connector (2). The filter housing (1) includes a breathing cap (11) and a transparent housing (12) connected vertically. The transparent housing (12) has a central rod (15) inside, and an annular desiccant chamber (16) is formed between the central rod (15) and the transparent housing (12). The lower end of the transparent housing (12) has multiple air vents (14). The base connector (2) is provided with external threaded connectors at both the upper and lower ends. The inner hole of the base connector (2) is provided with a circular filter screen (3). The upper external threaded connector of the base connector (2) is threadedly connected to the lower end of the transparent shell (12). The lower external threaded connector of the base connector (2) is connected to the vent of the gearbox or oil tank. The inner thread of the upper end of the base connector (2) is threadedly connected to the lower end of the center rod (15) to form an air channel.

2. The dehumidifying air filter according to claim 1, characterized in that: The base connector (2) includes a hexagonal prism (23), with a coarse thread (21) at the upper end for connecting the transparent shell (12) and a fine thread (22) at the lower end.

3. A dehumidifying air filter according to claim 1, characterized in that: The base connector (2) has a groove, and the circular filter screen (3) is fitted into the groove.

4. A dehumidifying air filter according to claim 3, characterized in that: The size of the circular filter (3) is adapted to the groove.

5. A dehumidifying air filter according to claim 1, characterized in that: The base connector (2) has an annular stepped surface inside. The radius of the circular filter screen (3) is greater than the radius of the lower part of the stepped surface and less than the radius of the upper part of the stepped surface.

6. A dehumidifying air filter according to claim 1, characterized in that: The circular filter (3) is made of stainless steel and has a thickness of 1 to 2.5 mm.

7. A dehumidifying air filter according to claim 6, characterized in that: The circular filter (3) has a rimmed structure and a mesh interior.

8. A dehumidifying air filter according to claim 6, characterized in that: The circular filter screen (3) has several ventilation holes (32) with a diameter of less than 2 mm. The diameter of the ventilation holes (32) is equivalent to 1 / 3 to 1 / 2 of the average diameter of the desiccant particles filled in the desiccant chamber (16).

9. A dehumidifying air filter according to claim 6, characterized in that: The circular filter (3) is also provided with an auxiliary structure (33), which is a strip structure or a crown structure, used to enhance the ventilation effect.

10. A dehumidifying air filter according to claim 1, characterized in that: The central rod (15) is elastic.

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