A new square filter

Abstract

The utility model discloses a novel square filter, including lower casing and upper casing, the upper casing is located the top of lower casing and both cap, the left end of lower casing is equipped with with its fixed connection's air intake pipe, the right end of lower casing is equipped with with its fixed connection's air outlet pipe, lower casing and upper casing jointly install filter screen, the top of lower casing is equipped with with its fixed connection's boss ring, the bottom of upper casing is equipped with with boss ring cooperation's concave ring groove, the boss ring inserts to arrange in concave ring groove, the bottom of upper casing is equipped with with its fixed connection's pressure ring. The utility model discloses through being equipped with one -way pressure relief's overvoltage protection mechanism, can when filter screen blockage leads to internal pressure too high automatic pressure relief, prevent the casing crack, seal failure and filter screen breakage etc. risk, guarantee equipment operation safety stability, this filter can improve filtration efficiency and operating stability greatly, reduce operation and maintenance cost simultaneously, more adaptation complex working condition's use demand.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a novel square filter. Background Technology

[0002] Square filters currently on the market typically consist of a housing and a built-in filter screen. The housing provides the mounting base and enclosed space, while the filter screen purifies the airflow by intercepting airflow.

[0003] Existing filters lack an effective overpressure protection mechanism. When impurities accumulate and pores become clogged due to long-term use, pressure builds up inside the filter. If the pressure cannot be released in time, the excessive pressure will directly affect the housing and filter screen, potentially causing damage such as housing cracking and sealing failure. It may also lead to a decrease in the filtration accuracy of the filter screen, and even the risk of a large amount of impurities entering the downstream system after the filter screen is damaged, seriously affecting the operational safety and stability of the equipment. To solve the above problems, this application proposes a novel square filter. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a novel square filter. Equipped with a one-way pressure relief overpressure protection mechanism, it can automatically release pressure when the internal pressure becomes too high due to filter screen blockage, preventing risks such as shell cracking, seal failure, and filter screen damage, thus ensuring safe and stable equipment operation. This filter can significantly improve filtration efficiency and operational stability while reducing maintenance costs, making it more suitable for complex working conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel square filter includes a lower housing and an upper housing. The upper housing is located on top of the lower housing and the two are covered together. The left end of the lower housing is provided with an air inlet pipe fixedly connected to it, and the right end of the lower housing is provided with an air outlet pipe fixedly connected to it. A filter screen is installed on both the lower housing and the upper housing. The top of the lower housing is provided with a protruding ring fixedly connected to it, and the bottom of the upper housing is provided with a concave ring groove that mates with the protruding ring. The protruding ring is inserted into the concave ring groove. The bottom of the upper housing is provided with a pressure ring fixedly connected to it, and multiple flow holes are opened through the pressure ring.

[0007] Preferably, the air inlet pipe has an air inlet channel, the air outlet pipe has an air outlet channel, the lower housing has a buffer chamber and a collection chamber, the air inlet channel is connected to the buffer chamber, the collection chamber is connected to the air outlet channel, the upper part of the filter screen is an unfiltered chamber, the lower part of the filter screen is a filtered chamber, and the filtered chamber is connected to the collection chamber.

[0008] Preferably, the two ends of the filter screen abut against the inner wall of the lower housing and the bottom of the pressure ring, respectively, and the filter screen is arranged all around to abut against the inner wall of the lower housing.

[0009] Preferably, the top of the upper housing has two pressure relief holes, and a one-way pressure relief valve is fixedly connected to the inner wall of each pressure relief hole.

[0010] Preferably, a sealing element is placed on the inner wall of the concave annular groove, and the top of the convex ring abuts against the outer wall of the sealing element.

[0011] Preferably, the plurality of flow holes are distributed at equal intervals, and the two ends of the flow holes are respectively connected to the buffer chamber and the unfiltered chamber.

[0012] Preferably, the lower housing and the upper housing are made of MBS resin.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] 1. By setting up an airflow buffer structure, the intake impact is effectively reduced, the airflow is stabilized, and the problems of low filtration efficiency and local wear of the filter caused by uneven local flow velocity are avoided.

[0015] 2. By adopting a reliable filter screen fixing structure, the filter screen is ensured to fit tightly against the inner wall of the housing, avoiding airflow short circuits and filter screen displacement and damage, extending the service life of the filter screen and reducing maintenance costs.

[0016] 3. Equipped with a one-way pressure relief overpressure protection mechanism, it can automatically release pressure when the internal pressure is too high due to filter clogging, preventing risks such as shell cracking, seal failure and filter damage, and ensuring safe and stable operation of the equipment.

[0017] 4. By designing a precise airflow guiding structure, the airflow evenly covers the filter surface, improving the overall utilization rate of the filter, avoiding local high load losses, and further extending the filter life.

[0018] In summary, by equipping the filter with a one-way pressure relief overpressure protection mechanism, it can automatically release pressure when the internal pressure is too high due to filter clogging, preventing risks such as shell cracking, seal failure, and filter damage, and ensuring safe and stable operation of the equipment. This filter can significantly improve filtration efficiency and operational stability, while reducing maintenance costs and is more suitable for use in complex working conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a novel square filter proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the lower housing structure of a novel square filter proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the upper housing structure of a novel square filter proposed in this utility model;

[0022] Figure 4 This is a cross-sectional schematic diagram of a novel square filter proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the lower housing of a novel square filter proposed in this utility model.

[0024] In the diagram: 1. Lower housing, 2. Upper housing, 3. Air inlet pipe, 4. Air outlet pipe, 5. Air inlet channel, 6. Buffer chamber, 7. Filter screen, 8. Collection chamber, 9. Air outlet channel, 10. Unfiltered chamber, 11. Filtered chamber, 12. Pressure relief hole, 13. One-way pressure relief valve, 14. Raised ring, 15. Concave ring groove, 16. Seal, 17. Pressure ring, 18. Flow hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-5 A novel square filter includes a lower housing 1 and an upper housing 2, with the upper housing 2 located on top of the lower housing 1 and covering it. The lower housing 1 and the upper housing 2 together form the main frame of the filter, providing a mounting base and enclosed space for the internal components. The lower housing 1 and the upper housing 2 are made of MBS resin. The left end of the lower housing 1 is provided with an air inlet pipe 3 fixedly connected to it, which guides the airflow to be filtered into the filter. The right end of the lower housing 1 is provided with an air outlet pipe 4 fixedly connected to it, which discharges the filtered clean airflow out of the filter. The lower housing 1 and the upper housing 2 are both equipped with a filter screen 7 (the filter screen 7 is made of nylon 66 material, with a filtration accuracy of 5-50μm, the mesh is made of twill weave, the mesh number is 100-500 mesh, the edge is wrapped, the wrapping material is ABS resin, and the thickness is 1mm). The two ends of the filter screen 7 abut against the inner wall of the lower housing 1 and the bottom of the pressure ring 17, respectively. The filter screen 7 is arranged to abut against the inner wall of the lower housing 1 on all four sides. The filter screen 7 forms an airflow filtration channel through the tight abutment relationship with the inner wall of the lower housing 1 and the pressure ring 17, forcing the airflow to pass through to intercept impurities.

[0027] Two pressure relief holes 12 are opened through the top of the upper housing 2. The pressure relief holes 12 provide an exhaust path for the internal overpressure airflow. A one-way pressure relief valve 13 is fixedly connected to the inner wall of each pressure relief hole 12. The one-way pressure relief valve 13 only allows the airflow to flow from the inside of the filter to the outside. It automatically opens to relieve pressure when the internal pressure is too high.

[0028] The lower housing 1 has a convex ring 14 fixedly connected to its top, and the upper housing 2 has a concave ring groove 15 that mates with the convex ring 14 at its bottom. The mating of the convex ring 14 and the concave ring groove 15 provides a positioning function for the closing of the lower housing 1 and the upper housing 2. The convex ring 14 is inserted into the concave ring groove 15, and a sealing element 16 is placed on the inner wall of the concave ring groove 15. The top of the convex ring 14 abuts against the outer wall of the sealing element 16. The sealing element 16 deforms under the abutting action of the convex ring 14 and the concave ring groove 15, thereby enhancing the sealing performance at the connection between the upper and lower housings. In this solution, the upper and lower housings can be connected by snap-fit ​​or bolts. This technology is existing technology and will not be described in detail here.

[0029] The bottom of the upper housing 2 is provided with a pressure ring 17 fixedly connected to it. The pressure ring 17 presses the filter screen 7 tightly against the inner wall of the lower housing 1 through its own structure, thereby fixing the filter screen 7. Multiple flow holes 18 are opened through the pressure ring 17. The multiple flow holes 18 are evenly distributed. The evenly distributed flow holes 18 allow the airflow to enter the unfiltered chamber 10 from the buffer chamber 6 evenly. The two ends of the flow holes 18 are respectively connected to the buffer chamber 6 and the unfiltered chamber 10. An air inlet channel 5 is opened through the air inlet pipe 3. The air inlet channel 5 provides a channel for the air to be filtered to enter the buffer chamber 6 from the air inlet pipe 3. An air outlet channel 9 is opened through the air outlet pipe 4. The air outlet channel 9 leads the clean airflow in the collection chamber 8 to the air outlet pipe. 4. A buffer chamber 6 and a collection chamber 8 are provided inside the lower housing 1. The buffer chamber 6 temporarily accommodates the incoming airflow to reduce the flow rate and achieve a stable flow effect. The air inlet channel 5 is connected to the buffer chamber 6, and the collection chamber 8 is connected to the air outlet channel 9. The collection chamber 8 gathers the clean airflow delivered by the filtered chamber 11 and guides it to the air outlet channel 9. The upper part of the filter screen 7 is set as the unfiltered chamber 10. The unfiltered chamber 10 temporarily stores the unfiltered airflow entering from the flow hole 18 and provides space for it to pass through the filter screen 7. The lower part of the filter screen 7 is set as the filtered chamber 11. The filtered chamber 11 collects the clean airflow after being filtered by the filter screen 7 and delivers it to the collection chamber 8. The filtered chamber 11 is connected to the collection chamber 8.

[0030] In this invention, the airflow to be filtered first enters the buffer chamber 6 inside the lower housing 1 through the air inlet channel 5 of the air inlet pipe 3. The buffer chamber 6 plays a preliminary buffering and stabilizing role for the airflow. Subsequently, the airflow enters the unfiltered chamber 10 between the upper housing 2 and the lower housing 1 through the flow hole 18 on the pressure ring 17 (the flow hole 18 connects the buffer chamber 6 and the unfiltered chamber 10).

[0031] Since the filter screen 7 is fixed between the upper and lower housings (its two ends are pressed against the inner wall of the lower housing and the bottom of the pressure ring, and its four sides are in contact with the inner wall of the lower housing), the airflow in the unfiltered chamber 10 must be forced through the filter screen 7 to achieve impurity filtration; the filtered clean airflow enters the filtered chamber 11 below the filter screen 7, and then enters the collection chamber 8 through the connection between the filtered chamber 11 and the collection chamber 8, and finally is discharged through the air outlet channel 9 of the air outlet pipe 4 to complete the filtration process.

[0032] In addition, the convex ring 14 is inserted into the concave ring groove 15 and abuts against the seal 16, ensuring the sealing performance after the upper and lower shells are closed (in this solution, the upper and lower shells can be connected by snap-fit ​​or bolts, which is existing technology and will not be described in detail here), preventing leakage of unfiltered airflow; when the internal pressure of the upper shell is too high, the one-way pressure relief valve 13 opens through the pressure relief hole 12 to relieve pressure, avoiding structural damage due to excessive pressure.

[0033] This filter is suitable for filtering gases with a temperature ≤80℃, humidity ≤90%, and no highly corrosive media (pH value 4-9), such as workshop ventilation filtration and air conditioning return air filtration.

Claims

1. A novel square filter, comprising a lower housing (1) and an upper housing (2), characterized in that, The upper housing (2) is located on top of the lower housing (1) and the two cover each other. The left end of the lower housing (1) is provided with an air inlet pipe (3) fixedly connected to it, and the right end of the lower housing (1) is provided with an air outlet pipe (4) fixedly connected to it. The lower housing (1) and the upper housing (2) are jointly equipped with a filter screen (7). The top of the lower housing (1) is provided with a protruding ring (14) fixedly connected to it. The bottom of the upper housing (2) is provided with a concave ring groove (15) that cooperates with the protruding ring (14). The protruding ring (14) is inserted into the concave ring groove (15). The bottom of the upper housing (2) is provided with a pressure ring (17) fixedly connected to it. Multiple flow holes (18) are opened through the pressure ring (17).

2. A novel square filter according to claim 1, characterized in that, An air inlet channel (5) is provided through the air inlet pipe (3), and an air outlet channel (9) is provided through the air outlet pipe (4). A buffer chamber (6) and a collection chamber (8) are provided inside the lower housing (1). The air inlet channel (5) is connected to the buffer chamber (6), and the collection chamber (8) is connected to the air outlet channel (9). An unfiltered chamber (10) is provided above the filter screen (7), and a filtered chamber (11) is provided below the filter screen (7). The filtered chamber (11) is connected to the collection chamber (8).

3. A novel square filter according to claim 1, characterized in that, The two ends of the filter screen (7) abut against the inner wall of the lower housing (1) and the bottom of the pressure ring (17) respectively, and the filter screen (7) is arranged to abut against the inner wall of the lower housing (1) on all four sides.

4. A novel square filter according to claim 1, characterized in that, The top of the upper housing (2) has two pressure relief holes (12) through it, and a one-way pressure relief valve (13) is fixedly connected to the inner wall of each pressure relief hole (12).

5. A novel square filter according to claim 1, characterized in that, A sealing element (16) is placed on the inner wall of the concave annular groove (15), and the top of the convex ring (14) abuts against the outer wall of the sealing element (16).

6. A novel square filter according to claim 1, characterized in that, The multiple flow holes (18) are distributed at equal intervals, and the two ends of the flow holes (18) are connected to the buffer chamber (6) and the unfiltered chamber (10) respectively.

7. A novel square filter according to claim 1, characterized in that, The lower housing (1) and the upper housing (2) are made of MBS resin.

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