Air filter structure

Abstract

The utility model relates to an air filter structure which comprises a shell provided with an air inlet and an air outlet, a fan and a filter element are sequentially arranged in the shell, an expansion part for mounting a filter screen is arranged at the air inlet of the shell, and the bottom end of the filter screen is fixed to the side wall of the expansion part through a rotating shaft. The top end of the filter screen is movably connected with the expansion part through a locking mechanism, a rectangular notch is formed in the corner edge of the bottom of the opening end of the shell at the air inlet, a rotating shaft is arranged in the notch, a protruding block is arranged at the top end of the rotating shaft, and a rectangular frame is arranged in the opening of the shell above the rotating shaft. The filter element is arranged in an opening of the rectangular frame, a movable groove is formed in the top end of the rectangular frame, a screw rod is arranged in the movable groove, a clamping block is arranged on the screw rod in the movable groove, and a clamping groove for containing the clamping block is formed in the top of the inner side wall of the shell. The device is simple in structure and convenient to use.

Description

Technical Field

[0001] The present invention relates to the field of air filters, and particularly to a structure of an air filter. Background Art

[0002] Air filters are mainly applied in fields such as pneumatic machinery and internal combustion machinery. Their function is to provide clean air for these mechanical equipment to prevent these mechanical equipment from inhaling air with impurity particles during operation, thereby increasing the probability of abrasion and damage. The main components of an air filter are a filter element and a housing. Among them, the filter element is the main filtering part, undertaking the gas filtering work, and the housing is an external structure that provides necessary protection for the filter element.

[0003] For example, an air filter with the patent number CN215506043U has the following defects during use. For example, the locking mechanism of the filter element is located outside the housing, and it is easy to be accidentally actuated, resulting in the loosening of the filter element. At the same time, when it is necessary to operate multiple sets of sliding rods and springs to prevent them from rebounding, another person needs to operate on the filter element to facilitate its installation and disassembly. This leads to an increase in the number of people and thus increases the labor cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a structure of an air filter.

[0005] The technical problems of the present invention are mainly solved by the following technical solutions:

[0006] An air filter structure includes a housing provided with an air inlet and an air outlet opening. A blower and a filter element are sequentially arranged inside the housing:

[0007] At the air inlet of the housing, there is an expansion part for installing a filter net. The bottom end of the filter net is fixed on the side wall of the expansion part through a rotating shaft, and the top end of the filter net is movably connected to the expansion part through a locking mechanism. At the bottom edge of the opening end of the housing at the air inlet, there is a rectangular notch. A rotating shaft is arranged inside the notch, and a convex block is arranged at the top end of the rotating shaft. A limiting block is arranged on the outer wall of the rotating shaft on one side of the convex block. Inside the opening of the housing above the rotating shaft, there is a rectangular frame, and a groove for buckling on the corresponding convex block is arranged at the bottom end of the rectangular frame. The filter element is arranged inside the opening of the rectangular frame. An activity groove is arranged at the top end of the rectangular frame, and a screw rod extending to the outside is arranged inside the activity groove. A clamping block is arranged on the screw rod inside the activity groove, and a clamping groove for accommodating the clamping block is arranged at the top of the inner side wall of the housing.

[0008] Preferably, the limiting block is arranged to abut against the side wall corresponding to one side of the top of the rotating shaft and corresponding to the notch.

[0009] Preferably, the rectangular frame and the filter element seal the opening of the air inlet, and the filter element is fixedly connected to the inner wall of the rectangular frame.

[0010] Preferably, a screw hole threadedly connected to a screw rod is provided on the side wall of the movable groove, wherein a driving block is provided at the end of the screw rod outside the rectangular frame.

[0011] Preferably, the side wall of the card slot is provided with a magnetic block which is in contact with one end surface of the card block.

[0012] Preferably, the locking mechanism includes a positioning channel arranged on the top surface of the filter screen, wherein a positioning hole corresponding to the positioning channel is arranged on the inner top wall of the expansion part, and a locking rod is arranged in the positioning channel and the positioning hole, and the bottom end of the locking rod is connected to the bottom of the positioning channel through a spring, wherein a sliding opening connected to the opening in the upper half of the positioning channel is also arranged on the outer side wall of the filter screen, and a toggle rod connected to the locking rod is arranged in the sliding opening, and the side wall at the edge of the filter screen is a solid structure.

[0013] Preferably, the rotating shaft and the end of the rotating shaft are fixed to the corresponding housing and the inner wall of the expansion part through bearings.

[0014] The beneficial effects of the present invention are as follows: the present invention opens the filter net to pull out the rectangular frame and the filter element in the shell, thereby facilitating cleaning or replacement thereof; at the same time, since the rotating shaft, protrusion, screw, block and other components for fixing the rectangular frame and the filter element are all located in the shell, it is not easy for an outsider to cause misoperation due to contact with them, thereby causing the rectangular frame and the filter element to loosen from the shell; and the installation and disassembly of the above-mentioned components can be completed by one person, which undoubtedly reduces the labor intensity and saves labor costs compared to the installation and disassembly method that requires the cooperation of multiple people. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 yes Figure 1 The enlarged view of point B in the middle;

[0018] Figure 4 yes Figure 1 Enlarged view of point C in the middle;

[0019] Figure 5 It is a schematic diagram of the structure between the movable slot and the card slot in the present invention.

[0020] In the figure: 1. housing, 2. fan, 3. filter element, 4. expansion part, 5. filter screen, 6. rotating shaft, 7. locking mechanism, 71. positioning channel, 72. positioning hole, 73. locking rod, 74. spring, 75. sliding opening, 76. toggle rod, 8. notch, 9. rotating shaft, 10. convex block, 11. limiting block, 12. rectangular frame, 13. groove, 14. movable groove, 15. screw rod, 16. clamping block, 17. clamping groove. Detailed implementation mode

[0021] The technical solution of the present invention will be further specifically described below through embodiments in conjunction with the drawings.

[0022] An air filter structure includes a housing 1 provided with an air inlet and an air outlet hole, wherein a fan 2 and a filter element 3 are sequentially arranged in the housing 1:

[0023] An expansion part 4 for installing a filter screen 5 is arranged at the air inlet of the housing 1. The bottom end of the filter screen 5 is fixed on the side wall of the expansion part 4 through a rotating shaft 6, and the top end of the filter screen 5 is movably connected to the expansion part 4 through a locking mechanism 7. A rectangular notch 8 is arranged on the bottom edge of the opening end of the housing 1 at the air inlet. A rotating shaft 9 is arranged in the notch 8, and a convex block 10 is arranged at the top end of the rotating shaft 9. A limiting block 11 is arranged on the outer wall of the rotating shaft 9 on one side of the convex block 10. A rectangular frame 12 is arranged in the opening of the housing 1 above the rotating shaft 9, and a groove 13 buckling on the corresponding convex block 10 is arranged at the bottom end of the rectangular frame 12. The filter element 3 is arranged in the opening of the rectangular frame 12. A movable groove 14 is arranged at the top end of the rectangular frame 12, and a screw rod 15 extending to the outside is arranged in the movable groove 14. A clamping block 16 is arranged on the screw rod 15 in the movable groove 14. A clamping groove 17 for accommodating the clamping block 16 is arranged at the top of the inner side wall of the housing 1, and a magnetic block attached to one end face of the clamping block 16 is arranged on the side wall of the clamping groove 17.

[0024] As Figure 3 shown, the limiting block 11 is arranged to abut against the side wall of the top side of the rotating shaft 9 corresponding to the notch 8. After the groove 13 on the rectangular frame 12 buckles on the convex block 10, it drives the rotating shaft 9 to rotate counterclockwise. When the rectangular frame 12 and the filter element 3 seal the opening of the housing 1 in the vertical state, the side wall of the notch 8 will abut against the limiting block 11, thereby restricting the rotating shaft 9 from driving the above components to continue rotating counterclockwise, so that the above components can smoothly seal the opening of the housing 1 and prevent it from rotating excessively.

[0025] In this embodiment, the rectangular frame 12 and the filter element 3 seal the air inlet opening, and the filter element 3 is fixedly connected to the inner wall of the rectangular frame 12.

[0026] In this embodiment, a threaded hole screwed with the screw rod 15 is arranged on the side wall of the movable groove 14, and a driving block is arranged at the end of the screw rod 15 outside the rectangular frame 12.

[0027] The locking mechanism 7 includes a positioning channel 71 arranged on the top surface of the filter screen 5, wherein a positioning hole 72 corresponding to the positioning channel 71 is arranged on the inner top wall of the expansion portion 4, and a locking rod 73 is arranged in the positioning channel 71 and the positioning hole 72, and the bottom end of the locking rod 73 is connected to the bottom of the positioning channel 71 through a spring 74, wherein a sliding opening 75 connected to the upper half opening of the positioning channel 71 is also arranged on the outer side wall of the filter screen 5, and a toggle rod 76 connected to the locking rod 73 is arranged in the sliding opening 75, and the side wall at the edge of the filter screen 5 is a solid structure.

[0028] In this embodiment, the ends of the rotating shaft 9 and the rotating shaft 6 are fixed to the corresponding inner walls of the housing 1 and the expansion portion 4 through bearings.

[0029] The method of using the present invention is as follows: the fan 2 is used to absorb air so that the air enters the air outlet from the air inlet, wherein a filter element 3 is arranged between the fan 2 and the air inlet, and the filter material of the filter element 3 is ultra-fine glass fiber filter paper with very small pores, which enhances the screening and diffusion effects on small dust particles, so it has a very high filtering effect.

[0030] When the filter element 3 needs to be cleaned, the toggle rod 76 is pulled downward to move it downward in the sliding opening 75, while driving the locking rod 73 downward to slide it out of the positioning hole 72 and compress the spring 74, and then the filter screen 5 is rotated to rotate around the rotating shaft 6, so that the expansion portion 4 is opened;

[0031] Then, the screw rod 15 is rotated to rotate in the screw hole, thereby driving the block 16 to rotate out of the slot 17 and slide into the movable slot 14. It should be noted that when the screw rod 15 rotates in the screw hole and drives the block 16 to rotate, it will undergo a small left-right displacement, but in this process, the side wall of the slot 17 will not resist the block 16 that has a slight left-right displacement. After the block 16 slides out of the slot 17, the rectangular frame 12 and the filter element 3 are rotated clockwise with the rotating shaft 9 as the center, so that the groove 13 on the rectangular frame 12 drives the protrusion 10 to drive the rotating shaft 9 to rotate. When the top of the rectangular frame 12 and the filter element 3 rotate to the opening of the expansion portion 4, the rectangular frame 12 can be moved obliquely upward to drive the groove 13 to separate from the protrusion 10, thereby achieving the purpose of extracting the rectangular frame 12 and the filter element 3 from the housing 1, and the installation steps of the rectangular frame 12 and the filter element 3 are opposite.

[0032] The present invention is described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An air filter structure, comprising a housing provided with an air inlet and an air outlet, wherein a fan and a filter element are sequentially arranged in the housing, characterized in that: An expansion part for installing a filter is provided at the air inlet of the shell, wherein the bottom end of the filter is fixed to the side wall of the expansion part by a rotating shaft, and the top end of the filter is movably connected to the expansion part by a locking mechanism, a rectangular notch is provided on the corner edge of the bottom of the opening end of the shell at the air inlet, wherein a rotating shaft is provided in the notch, and a protrusion is provided at the top end of the rotating shaft, a limiting block is provided on the outer wall of the rotating shaft on one side of the protrusion, wherein a rectangular frame is provided in the shell opening above the rotating shaft, and a groove buckled on the corresponding protrusion is provided at the bottom end of the rectangular frame, the filter element is provided in the rectangular frame opening, wherein a movable groove is provided at the top end of the rectangular frame, and a screw extending to the outside is provided in the movable groove, a card block is provided on the screw in the movable groove, wherein a card slot for accommodating the card block is provided at the top of the inner wall of the shell.

2. An air filter structure according to claim 1, characterized in that: The limit block is arranged on one side of the top of the rotating shaft and abuts against a side wall corresponding to the notch.

3. An air filter structure according to claim 1, characterized in that: The rectangular frame and the filter element seal the air inlet opening, wherein the filter element is fixedly connected to the inner wall of the rectangular frame.

4. An air filter structure according to claim 1, characterized in that: The side wall of the movable groove is provided with a screw hole which is screwed to the screw rod, wherein the end of the screw rod outside the rectangular frame is provided with a driving block.

5. The air filter structure according to claim 1, characterized in that: The side wall of the card slot is provided with a magnetic block which is in contact with one end surface of the card block.

6. An air filter structure according to claim 1, characterized in that: The locking mechanism includes a positioning channel arranged on the top surface of the filter screen, wherein a positioning hole corresponding to the positioning channel is arranged on the inner top wall of the expansion part, and a locking rod is arranged in the positioning channel and the positioning hole, and the bottom end of the locking rod is connected to the bottom of the positioning channel through a spring, wherein a sliding opening connected to the opening in the upper half of the positioning channel is also arranged on the outer side wall of the filter screen, and a toggle rod connected to the locking rod is arranged in the sliding opening, and the side wall at the edge of the filter screen is a solid structure.

7. An air filter structure according to claim 1, characterized in that: The rotating shaft and the end of the rotating shaft are both fixed on the corresponding housing and the inner wall of the expansion part through bearings.

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