A vent filter with convenient filter replacement

Abstract

The utility model relates to air purification related technical field especially, a kind of ventilation filter of filter element convenient to replace, to solve the problem of existing filter replacement cumbersome, locking unreliable, it includes the outer frame and inner frame of adaptation, outer frame is equipped with inner chamber, first sliding slot and limiting hole, inner frame is equipped with round groove, movable slot, mounting groove, movable rod in round groove is connected with two groups of force block in movable slot, pre-compression spring sleeve in mounting groove is equipped in movable rod, force block is equipped with L-shaped slot and the second sliding block of adaptation with second sliding slot, inner frame is slidably connected with first sliding slot by first sliding block, by the opposite press L-shaped slot, can synchronous drive force block and drive movable rod to unlock and separate limiting hole, pull out inner frame can replace filter element, after reset, spring pushes movable rod and inserts limiting hole and is automatically locked, the device does not need tool, operation is convenient, locking is reliable, pull out smoothly, greatly improve filter element replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, and in particular to a ventilation filter that is easy to replace the filter element. Background Technology

[0002] As a core component of air purification systems, ventilation filters are widely used in HVAC systems, cleanrooms, laboratories, medical facilities, and civil buildings. They intercept pollutants such as dust, particulate matter, and harmful gases in the air to ensure indoor air quality. As the usage time increases, the filter element will accumulate pollutants, leading to increased ventilation resistance and decreased filtration efficiency. Therefore, it needs to be disassembled and replaced regularly. Existing bolt-connected filters require the removal of multiple bolts with tools such as wrenches to pull out the inner frame, which is cumbersome. Clip-on filters mostly use an independent clip design at the top and bottom, which requires unlocking the top and bottom clips separately during replacement, resulting in problems such as asynchronous unlocking and clip jamming.

[0003] To address the aforementioned issues, a ventilation filter with an easy-to-replace filter element is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a ventilation filter with a convenient filter element replacement, in order to solve the problem of the existing ventilation filters with convenient filter element replacement mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ventilation filter that facilitates filter element replacement, comprising an outer frame and an inner frame, wherein the inner wall of the outer frame is connected to an inner cavity on one side, and the inner frame is adapted to the inner cavity of the outer frame; The inner frame includes four sets of circular grooves symmetrically opened at the top and bottom of one side. A movable groove is opened in the middle of one side of the inner frame. Four sets of mounting grooves are opened on one side of the inner frame. A movable rod is installed inside the circular groove. Two sets of force-bearing blocks are installed inside the movable groove, and the force-bearing blocks are connected to the ends of the movable rods. A spring is installed inside the mounting groove, and the spring is sleeved on the movable rod.

[0006] Preferably, the outer frame further includes a first sliding groove opened at the bottom and top of the inner cavity, and four sets of limiting holes are opened at the top and bottom of one side of the inner cavity, with the limiting holes located on the outside of the first sliding groove.

[0007] Preferably, the inner frame further includes a first slider integrally formed on one side of its top, and the first slider is adapted to the first slide groove. A second slide groove is provided on the side of the movable groove. Second sliders are integrally formed on both sides of the force-bearing block, and the second sliders are adapted to the second slide groove. An L-shaped groove is provided on the outer side of the force-bearing block.

[0008] Preferably, one end of the spring is connected to the force-bearing block, and the other end is connected to the top wall of the mounting groove. The spring is always in a pre-compressed state to provide an elastic driving force for the movable rod in the direction of the limiting hole.

[0009] Preferably, the diameter of the mounting groove is larger than the diameter of the circular groove, and both the mounting groove and the circular groove are connected to the movable groove.

[0010] Preferably, the inner frame slides with the outer frame through a first slider, allowing the inner frame to move in a pull-out manner within the inner cavity along the extension direction of the first slider, and the four sets of limiting holes are respectively matched with the four sets of movable rods.

[0011] Preferably, the force-bearing block is slidably connected to the second slide groove via the second slider, and the force-bearing block drives the movable rod to move synchronously along the axial direction of the circular groove. The extension direction of the second slide groove is consistent with the movement direction of the movable rod, which is used to limit the movement trajectory of the force-bearing block.

[0012] Preferably, the L-shaped grooves of the force-bearing blocks have opposite opening directions. External force drives the two sets of force-bearing blocks to move towards each other synchronously through the two sets of L-shaped grooves, thereby causing the movable rods at the top and bottom to synchronously compress the corresponding springs and simultaneously disengage from the corresponding limiting holes at the top and bottom of the inner frame. This releases the limiting lock of the upper and lower parts of the inner frame in one go. After the external force is released, the two sets of springs synchronously reset and push the movable rods at the top and bottom to synchronously insert into the limiting holes, thereby achieving synchronous locking of the upper and lower parts of the inner frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This device adopts a linkage design of two sets of force blocks and four sets of movable rods. By applying opposing pressure through the L-shaped groove with opposite openings, the four sets of movable rods in the upper and lower parts can be driven to disengage from the limiting holes in a single operation, thereby releasing the inner frame lock in one go. No auxiliary tools are required, and a single person can complete the filter replacement in just 30-60 seconds. The efficiency is 5-10 times higher than that of traditional devices. The L-shaped groove is suitable for operation by an adult's fingertips, and the direction of force application is reasonable, avoiding the tedious process of traditional buckles that require forceful prying or bolts that require repeated tightening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the outer frame of this utility model; Figure 3 This is a cross-sectional structural diagram of the inner frame of this utility model; Figure 4 This is a schematic diagram of the disassembled sectional structure of the inner frame of this utility model; Figure 5 This utility model Figure 3 Enlarged structural diagram at point A; Figure 6 This utility model Figure 4 A magnified structural diagram at point B in the middle.

[0015] In the figure: 1. Outer frame; 101. Inner cavity; 102. First slide groove; 103. Limiting hole; 2. Inner frame; 201. Circular groove; 202. Movable groove; 203. Mounting groove; 204. Movable rod; 205. Force-bearing block; 206. Spring; 207. First slider; 208. Second slide groove; 209. Second slider; 210. L-shaped groove. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Example like Figure 3-6 As shown, the inner frame 2 includes four sets of circular grooves 201 symmetrically opened at the top and bottom of one side, a movable groove 202 opened in the middle of one side of the inner frame 2, and four sets of mounting grooves 203 opened on one side of the inner frame 2. A movable rod 204 is provided inside the circular groove 201. Two sets of force-bearing blocks 205 are provided inside the movable groove 202, and the force-bearing blocks 205 are connected to the ends of the movable rod 204. A spring 206 is provided inside the mounting groove 203, and the spring 206 is sleeved on the movable rod 204. The inner frame 2 also includes a first slider 207 integrally formed on one side of its top, and the first slider 207 is adapted to the first sliding groove 102. A second sliding groove 208 is opened on the side of the movable groove 202. A second slider 209 is integrally formed on both sides of the force-bearing block 205, and the second slider 209 is adapted to the second sliding groove 208. An L-shaped groove 210 is opened on the outer side of the force-bearing block 205.

[0018] It should be noted that in this embodiment, the inner frame 2 is a rectangular frame adapted to the inner cavity 101 of the outer frame 1, with a pre-reserved filter element mounting cavity inside. The size of the filter element mounting cavity matches the filter element to be replaced. The pull-out side of the inner frame 2 is the operating end. The top and bottom ends of the inner frame 2 away from the pull-out side are respectively integrally formed with T-shaped first sliders 207 adapted to the first slide groove 102. The sliders are 5cm long, and the sliding fit clearance with the first slide groove 102 is 0.1-0.2mm to ensure smooth sliding without deviation. On the top and bottom of the operating side of the inner frame 2, four sets of circular grooves 201 are symmetrically opened along the width direction for accommodating... The movable rod 204 provides a guide for movement. Four sets of mounting slots 203 are symmetrically opened on both sides of the middle of the operating side of the inner frame 2. Each mounting slot 203 is a cylindrical groove, and its axis is collinear with the axis of the circular groove 201. The diameter of the mounting slot 203 is larger than that of the circular groove 201, forming a stepped structure for limiting and installing the spring 206. A rectangular movable slot 202 is opened in the middle of the operating side of the inner frame 2. This movable slot 202 communicates with the four sets of mounting slots 203, providing movement space for the force-bearing block 205. The four movable rods 204 are cylindrical rods, with one end inserted into the circular groove 201 and the other end... Extending into the movable groove 202 and fixedly connected to the force-bearing block 205, the two sets of force-bearing blocks 205 are rectangular block structures, symmetrically arranged in the movable groove 202. Each set of force-bearing blocks 205 is fixedly connected to two sets of movable rods 204. The upper force-bearing block 205 is connected to the two sets of top movable rods 204, and the lower force-bearing block 205 is connected to the two sets of bottom movable rods 204. Four sets of springs 206 are respectively sleeved on the four sets of movable rods 204. One end of the spring 206 abuts against the side wall of the force-bearing block 205, and the other end abuts against the top step surface of the mounting groove 203. The spring 206 is always in a pre-compressed state to ensure that the movable rods are in a natural state. 204 has a continuous elastic driving force in the direction of the limiting hole 103. On the two side walls of the movable groove 202, two second sliding grooves 208 are symmetrically opened along the height direction. At the same time, on the two side walls of the force block 205, a second slider 209 adapted to the second sliding groove 208 is integrally formed. The size of the second slider 209 is clearance-fitted with the second sliding groove 208, which limits the force block 205 to move only along the axis of the movable rod 204 to avoid deviation. On the outer side walls of the two sets of force blocks 205, L-shaped grooves 210 are respectively opened. The opening directions of the L-shaped grooves 210 are opposite to each other, which is suitable for operation by the fingertips of adults and facilitates the application of opposing pressure.

[0019] like Figure 1 , 2As shown, it includes an outer frame 1 and an inner frame 2. The inner wall of the outer frame 1 is connected to a cavity 101 on one side. The inner frame 2 is adapted to the cavity 101 of the outer frame 1. The outer frame 1 also includes a first sliding groove 102 opened at the bottom and top of the cavity 101. Four sets of limiting holes 103 are opened at the top and bottom of one side of the cavity 101, and the limiting holes 103 are located on the outside of the first sliding groove 102.

[0020] It should be noted that in this embodiment, the outer frame 1 is a rectangular frame structure, and an inner cavity 101 is formed on one side of its inner wall along the thickness direction. The size of the inner cavity 101 is matched with the outer dimensions of the inner frame 2 to ensure that the inner frame 2 can be smoothly pulled out without shaking. On the inner side of the top and bottom of the inner cavity 101, two first sliding grooves 102 are symmetrically formed along the length direction. The sliding grooves have a T-shaped cross section and are used to cooperate with the first slider 207 of the inner frame 2 to achieve guidance. At the same time, on the top and bottom of the opening side of the inner cavity 101, four sets of limiting holes 103 are symmetrically formed. The limiting holes 103 are circular through holes, and their positions correspond one-to-one with the four sets of movable rods 204 of the inner frame 2. The four sets of limiting holes 103 are all located outside the first sliding grooves 102, and the center distance between the upper and lower sets of limiting holes 103 is consistent with the center distance between the upper and lower sets of movable rods 204 of the inner frame 2, ensuring that the movable rods 204 can be accurately inserted when locked.

[0021] The outer frame 1 and inner frame 2 are both made of 6063 aluminum alloy in one piece by extrusion molding, and the surface is anodized, which has both rust resistance and structural stability. The movable rod 204 is made of 304 stainless steel to avoid wear and deformation caused by long-term sliding. The spring 206 is a stainless steel compression spring 206 to ensure elastic fatigue life under long-term pre-compression. The force block 205 is made of ABS engineering plastic injection molding, and the surface is treated with anti-slip texture to improve the operating feel.

[0022] Optionally, a rubber sealing gasket can be provided at the opening end of the inner cavity 101 of the outer frame 1. After the inner frame 2 is locked, the sealing gasket fits the contact surface between the inner frame 2 and the outer frame 1 to prevent airflow from leaking through the gap and ensure filtration efficiency. The sealing gasket is made of weather-resistant silicone rubber to avoid aging after long-term use.

[0023] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-6 Under normal conditions, the four sets of movable rods 204 extend out of the circular groove 201 and insert into the four sets of limiting holes 103 of the outer frame 1 under the pre-compression elastic force of the corresponding springs 206, thereby achieving synchronous locking of the upper and lower parts of the inner frame 2. At the same time, the force block 205 is at the outer limit position of the movable groove 202 under the pushing force of the spring 206, and the second slider 209 is in contact with the outer end of the second sliding groove 208 to ensure the stability of the locked state and prevent the movable rods 204 from disengaging from the limiting holes 103 due to airflow vibration during ventilation. When the filter needs to be replaced, the operator inserts their index fingers into the L-shaped grooves 210 of the two sets of force blocks 205 respectively, and applies opposing pressure, that is, pushes the lower force block 205 upward and presses the upper force block 205 downward. Since the force blocks 205 slide with the second slide groove 208 through the second slider 209, and the second slide groove 208 restricts the force blocks 205 to move only in the horizontal direction, the two sets of force blocks 205 will move synchronously towards the center of the movable groove 202. When the force blocks 205 move, they drive the four sets of movable rods 204 fixedly connected to them to retract synchronously in the axial direction of the circular groove 201, and compress the spring 206 in the mounting groove 203. When the end of the movable rod 204 completely disengages from the limiting hole 103 of the outer frame 1, the locking state between the inner frame 2 and the outer frame 1 is released. At this time, the pressure on the force blocks 205 remains unchanged, and the pull-out operation can be performed. After the lock is released, the operator holds the operating end of the inner frame 2 or uses the reverse force of the L-shaped groove 210 to pull the inner frame 2 outward along the extension direction of the first slide groove 102. Due to the guiding cooperation between the first slider 207 and the first slide groove 102, the inner frame 2 can be smoothly and without deviation pulled out from the inner cavity 101 of the outer frame 1. After the inner frame 2 is pulled out, the operator removes the old filter element inside the inner frame 2 and installs the new filter element into the filter element installation cavity. After the filter element is replaced, push the inner frame 2 into the inner cavity 101 until the inner end of the inner frame 2 fits against the inner wall of the inner cavity 101. At this time, the axis of the four sets of movable rods 204 coincides with the axis of the four sets of limiting holes 103 of the outer frame 1. The operator releases the pressure on the force block 205, and the pre-compressed spring 206 quickly returns to its original position, generating an outward elastic thrust, which pushes the force block 205 and the movable rods 204 to move outward synchronously. The end of the movable rod 204 is inserted into the limiting hole 103 again, realizing the relocking of the inner frame 2 and the outer frame 1. The entire replacement process is completed.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation filter with a convenient filter element replacement, characterized in that: It includes an outer frame (1) and an inner frame (2), the inner wall of the outer frame (1) is connected to a cavity (101) on one side, and the inner frame (2) is adapted to the cavity (101) of the outer frame (1); The inner frame (2) includes four sets of circular grooves (201) symmetrically opened on the top and bottom of one side. A movable groove (202) is opened in the middle of one side of the inner frame (2). Four sets of mounting grooves (203) are opened on one side of the inner frame (2). A movable rod (204) is provided inside the circular groove (201). Two sets of force blocks (205) are provided inside the movable groove (202), and the force blocks (205) are connected to the ends of the movable rod (204). A spring (206) is provided inside the mounting groove (203), and the spring (206) is sleeved on the movable rod (204).

2. The ventilation filter with convenient filter element replacement according to claim 1, characterized in that: The outer frame (1) also includes a first slide groove (102) opened at the bottom and top of the inner cavity (101). Four sets of limiting holes (103) are opened at the top and bottom of one side of the inner cavity (101), and the limiting holes (103) are located on the outside of the first slide groove (102).

3. A ventilation filter with a convenient filter element replacement according to claim 1, characterized in that: The inner frame (2) also includes a first slider (207) integrally formed on one side of its top, and the first slider (207) is adapted to the first slide groove (102). The side of the movable groove (202) is provided with a second slide groove (208). The two sides of the force block (205) are integrally formed with second sliders (209), and the second sliders (209) are adapted to the second slide groove (208). The outer side of the force block (205) is provided with an L-shaped groove (210).

4. A ventilation filter with convenient filter element replacement according to claim 1, characterized in that: One end of the spring (206) is connected to the force-bearing block (205), and the other end is connected to the top wall of the mounting groove (203). The spring (206) is always in a pre-compressed state to provide the movable rod (204) with an elastic driving force toward the limiting hole (103).

5. A ventilation filter with convenient filter element replacement according to claim 1, characterized in that: The diameter of the mounting groove (203) is larger than that of the circular groove (201), and both the mounting groove (203) and the circular groove (201) are connected to the movable groove (202).

6. A ventilation filter with convenient filter element replacement according to claim 2, characterized in that: The inner frame (2) slides with the first slide groove (102) of the outer frame (1) through the first slider (207), so that the inner frame (2) moves in a pull-out manner in the inner cavity (101) along the extension direction of the first slide groove (102), and the four sets of limiting holes (103) are respectively matched with the four sets of movable rods (204).

7. A ventilation filter with a convenient filter element replacement according to claim 3, characterized in that: The force-bearing block (205) is slidably connected to the second slide groove (208) via the second slider (209), and the force-bearing block (205) drives the movable rod (204) to move synchronously along the axial direction of the circular groove (201). The extension direction of the second slide groove (208) is consistent with the movement direction of the movable rod (204), which is used to limit the movement trajectory of the force-bearing block (205).

8. A ventilation filter with convenient filter element replacement according to claim 3, characterized in that: The L-shaped grooves (210) of the force-bearing blocks (205) have opposite opening directions. External force drives the two sets of force-bearing blocks (205) to move in opposite directions through the two sets of L-shaped grooves (210), thereby driving the movable rods (204) at the top and bottom to compress the corresponding springs (206) synchronously, and at the same time disengage from the corresponding limiting holes (103) at the top and bottom of the inner frame (2), releasing the limiting lock of the upper and lower parts of the inner frame (2) in one go. After the external force is released, the two sets of springs (206) are reset synchronously, pushing the movable rods (204) at the top and bottom to insert into the limiting holes (103) synchronously, realizing the synchronous locking of the upper and lower parts of the inner frame (2).

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