TWI789909B - air filter - Google Patents

Abstract

The invention is an air filter, which includes an outer cylinder, a ring cover, at least one first filter element and a second filter element; the outer cylinder includes an air inlet and an exhaust port connected to the inside of the outer cylinder; the ring cover is arranged inside the outer cylinder , form an annular flow space with the outer cylinder; each first filter element is in the shape of a ring cone, and forms an air flow port; each second filter element is surrounded by a ring cover, and there is a gap between the ring cover, and the second filter element and the ring cover The first filter elements are staggered along the axis of the outer cylinder, so that the second filter element blocks the airflow port of the first filter element; this creation makes the air flow velocity and direction through the shape and structure of the first filter element and the second filter element The change increases the number of collisions and the collision area of the air inside the outer cylinder, and cooperates with the sedimentation effect of gravity on impurities and moisture in the air to improve the efficiency of this creation in filtering air.

Description

air filter

The invention relates to an air filter, especially an air filter which utilizes the physical characteristics of fluid turbulence to filter moisture and impurities in the air.

Air filter, as the name implies, is a device used to filter moisture, dust or other impurities in the air and filter the air. It is usually used in spaces that require dust and pollution prevention, such as laboratories and operating rooms. In recent years, the problem of air pollution has become more and more serious. Many consumers will also purchase air filters to maintain the quality of their indoor air.

Most of the existing air filters are used to filter impurities in the air by setting filter screens or filter cores inside to block dust, moisture or other impurities in the air, thereby filtering dust, moisture or other impurities from the air. To achieve the effect of air filtration.

However, the existing air filters have the following disadvantages: use a filter screen or a filter core to filter the air, and the dust and impurities filtered out will be attached to the filter screen or filter core, which not only requires constant replacement of the filter screen or filter core, but also requires maintenance. The cost is high, and the discarded filter screen or filter element is likely to pollute the environment; in addition, dust and impurities attached to the filter screen or filter core will weaken the filtering ability of the existing air filter, making it unable to achieve the desired effect.

In order to solve the lack of existing air filters, the purpose of this creation is to propose an air filter that uses the physical characteristics of inertial impact to filter moisture and impurities in the air, does not need to replace the filter screen or filter element, and has low maintenance costs.

The air filter proposed by this creation to solve technical problems includes: An outer cylinder, which includes an air inlet and an exhaust port, the air inlet penetrates the peripheral wall of the outer cylinder and communicates with the interior of the outer cylinder; the exhaust port is arranged at the top of the outer cylinder and communicates with the interior of the outer cylinder ; A ring cover, which is arranged inside the outer tube, and extends from the top of the outer tube to the bottom of the outer tube in a tubular shape, the ring cover forms a ring with the outer tube and communicates with the air inlet of the outer tube a flow space, and the inside of the ring cover communicates with the exhaust port of the outer cylinder; At least one first filter element, each of which is in the shape of a ring cone, surrounds the inner wall of the ring cover and tapers toward the bottom of the outer cylinder, and each of the first filter elements is provided with an air flow port; and At least one second filter element, each of which is surrounded by the ring cover, the at least one second filter element and the at least one first filter element are arranged in a staggered manner along the axis of the outer cylinder, so that the at least one filter element The airflow port of the first filter element is blocked by the at least one second filter element; there is a gap between each second filter element and the ring cover, and includes an air guide part, which is formed on the second filter element The part is close to the side of the bottom of the outer cylinder, the air guide part is conical, and the tip of the air guide part faces the bottom of the outer cylinder.

The air filter, wherein each of the second filter elements includes a guide portion, the guide portion is formed on the side of the second filter element close to the top of the outer cylinder, and the guide portion protrudes toward the The exhaust port of the outer cylinder.

The air filter further includes a spiral filter element, which is surrounded by the ring cover and has a gap with the ring cover; the spiral filter element extends along the axis of the outer cylinder to form a It is in the shape of a spiral surface and gradually expands toward the top of the outer cylinder.

In the above air filter, the air guiding part of each of the second filter elements is conical.

In the above-mentioned air filter, the section of the air-guiding part of each of the second filter elements has two arcs, and the two arcs are recessed toward the axis of the outer cylinder.

In the above air filter, the guide portion of each of the second filter elements is conical.

In the air filter, the guide portion of each of the second filter elements is dome-shaped, so that the cross-section of the guide portion of each of the second filter elements is arcuate.

The effect enhancement that the technical means of this creation can obtain is: 1. The air filter of this invention uses the ring cover installed inside the outer cylinder to make the air easily form turbulent flow after entering the outer cylinder and pass through the first filter element and the second filter The shape and structure of the parts increase the number of collisions and the collision area when the air flows, making it easier for moisture, fine particles or other impurities in the air to be filtered out due to the characteristics of inertial impact and gravity sedimentation. Filtration efficiency. 2. The air filter of this creation uses a simple structure and the physical characteristics of the fluid to achieve the filtering effect, and collects the filtered water, fine particles or Other impurities are easy to manufacture and easy to clean, and there is no need to replace the filter material, which can reduce maintenance costs.

In order to understand the technical characteristics and practical effects of this creation in detail, and to realize it according to the content of the creation, the preferred embodiment shown in the figure is further described in detail as follows:

As shown in Figure 1, the air filter of the first preferred embodiment of the present invention includes an outer cylinder 10, a switch valve 20, a ring cover 30, two first filter elements 40, and three second filter elements 50, wherein :

The outer cylinder 10 is cylindrical. As shown in FIG. Channel 13; the bottom 102 of the outer cylinder 10 is conical in shape, and tapers away from the top 101 of the outer cylinder 10; , and the air inlet 11 is adjacent to the top 101 of the outer cylinder 10; the exhaust port 12 is provided through the top 101 of the outer cylinder 10 along the axis L1 of the outer cylinder 10 to communicate with the inside of the outer cylinder 10; The discharge passage 13 is arranged at the bottom 102 of the outer cylinder 10 along the axis L1 of the outer cylinder 10, and communicates with the inside of the outer cylinder 10 and the outside of the outer cylinder 10; the switch valve 20 is arranged on the outer cylinder 10, and can open or close the discharge channel 13.

As shown in FIG. 1 , the ring cover 30 is disposed inside the outer tube 10 and is in the shape of a circular tube extending from the top 101 of the outer tube 10 toward the bottom 102 of the outer tube 10 . The outer cylinder 10 is coaxial, and the ring cover 30 and the outer cylinder 10 form an annular flow space S1 communicating with the air inlet 11 of the outer cylinder 10, and the inside of the annular cover 30 and the exhaust of the outer cylinder 10 The mouth 12 and the discharge channel 13 of the outer cylinder 10 are connected; the ring cover 30 includes an air inlet 31, the air inlet 31 is located at the bottom of the ring cover 30, close to the bottom 102 of the outer cylinder 10, and communicates with the ring The inside of the cover 30 and the flow space S1; as shown in Figures 1 and 2, each of the first filter elements 40 is in the shape of a ring cone, surrounding the inner wall of the ring cover 30 and tapering toward the bottom 102 of the outer cylinder 10 Each of the first filter elements 40 is provided with an air outlet 41 .

As shown in Figure 1 and Figure 2, each of the second filter elements 50 is connected to the ring cover 30 with a plurality of connecting arms 501, and is surrounded by the ring cover 30, the three second filter elements 50 and the two first filter elements 40 are arranged in a staggered manner along the axis L1 of the outer cylinder 10, so that the airflow ports 41 of each of the first filter elements 40 are blocked by two of the second filter elements 50, and each of the second filter elements 50 There is a gap between the ring cover 30; each of the second filter elements 50 includes an air guide part 51 and a guide part 52, and the air guide part 51 is formed at the bottom of the second filter element 50 close to the outer cylinder 10 102, and the air guiding part 51 is conical, in the first preferred embodiment, the air guiding part 51 is conical, and the tip of the air guiding part 51 faces the discharge channel 13 of the outer tube 10 The guide portion 52 is formed on the side of the second filter element 50 close to the top 101 of the outer cylinder 10, and protrudes toward the top 101 of the outer cylinder 10. In the first preferred embodiment, the guide portion 52 is conical, and the tip of the guide portion 52 faces the exhaust port 12 of the outer tube 10 .

The description of the use of the first preferred embodiment of this creation is as follows: as shown in Figure 3 with Figure 1 and Figure 2, during use, air enters the inside of the outer cylinder 10 from the air inlet 11 of the outer cylinder 10, and then passes along the The flow space S1 flows towards the bottom 102 of the outer cylinder 10, and then the air flows into the inside of the ring cover 30 through the air inlet 31 of the ring cover 30, and passes through the second filter element 50 and the ring cover in sequence. 30 and the airflow port 41 of the first filter element 40 , and finally the air flows out from the exhaust port 12 of the outer cylinder 10 .

As shown in FIG. 3 with FIG. 1 and FIG. 2, when the air enters the interior of the outer cylinder 10, it will hit the outer wall of the ring cover 30, and the air will continue to hit the ring cover 30 when flowing in the flow space S1. The outer wall of the outer cylinder and the inner wall of the outer cylinder 10 are easy to form turbulence; the air then collides with the inner wall of the bottom 102 of the outer cylinder 10, and after flowing into the ring cover 30, the air will collide with the second filter element 50 The air guiding part 51 is guided by the air guiding part 51 to change the flow direction, collide with the inner wall of the ring cover 30, then collide with the first filter element 40, and so on, and finally collide with the outer cylinder After the top 101 of the turbulent flow, it flows out from the exhaust port 12 of the outer cylinder 10; the moisture, fine particles or other impurities in the air flow out due to the inertia, impact, and gravity of the eddy current in the turbulent flow. and other characteristics and are blocked by the structure that the air collides with, and are no longer filtered out with the air flow; while the filtered moisture, fine particles or other impurities will be filtered along the second filter element 50 The air guiding part 51, the guiding part 52 and the first filter element 40 are collected downwards and accumulated in the bottom 102 of the outer cylinder 10, and the accumulated moisture can be discharged by opening the discharge channel 13 by operating the switch valve 20. , fine particles or other impurities are discharged.

In the first preferred embodiment of the present invention, the bottom 102 of the outer cylinder 10 is in the shape of a ring cone. When the air flows down along the flow space S1 and hits the inner wall of the bottom 102 of the outer cylinder 10, it can This makes the air easier to form turbulent flow; the bottom 102 of the outer cylinder 10 can also enhance the collection effect of moisture, fine particles or other impurities.

The second preferred embodiment of this creation is roughly the same as the first preferred embodiment, the difference is that the three second filter elements 50A included in the air filter of the second preferred embodiment of this invention are the same as those of the first preferred embodiment The shapes of the three second filter elements 50 are different. As shown in FIG. 4 , in the second preferred embodiment of the present invention, the air guide portion 51A of each second filter element 50A is conical, and the air guide portion The cross-section of 51A has two arcs 511, and the two arcs 511 are recessed toward the axis L1 of the outer cylinder 10; the guide portion 52A of each second filter 50A is dome-shaped, so that each second filter The cross-section of the guide portion 52A of 50A is arcuate as shown in FIG. 4 .

The third preferred embodiment of the invention is roughly the same as the first preferred embodiment, the difference is that, as shown in Figure 5, in the third preferred embodiment of the invention, the air filter only includes two second filter element 50, and the air filter further includes a spiral filter element 60; as shown in Figure 5 and Figure 6, the spiral filter element 60 is connected to the inner wall of the ring cover 30 through a plurality of connecting arms 601, and is supported by the ring The cover 30 surrounds, and there is a gap between the spiral filter element 60 and the annular cover 30; the spiral filter element 60 extends along the axis L1 of the outer cylinder 10 and is in the shape of a spiral curved surface, and faces the top of the outer cylinder 10 101 gradually expanding; the spiral filter element 60 is covered under one of the first filter elements 40; in the two second filter elements 50, the two first filter elements 40 and the spiral filter element 60, the The spiral filter element 60 is the element closest to the bottom 102 of the tub 10 .

The third preferred embodiment of this creation is also roughly the same as the first preferred embodiment of this creation in use. After the air enters the ring cover 30, the air hits the spiral of the spiral filter 60 facing the bottom 102 of the outer cylinder 10. surface, and the air is guided by the spiral filter element 60 that expands and accelerates to hit the inner wall of the ring cover 30. The spiral filter element 60 can further increase the number and area of air collisions inside the outer cylinder 10; After the air filter stops filtering, filtered water, fine particles or other impurities can collect toward the bottom 102 of the outer cylinder 10 along the helical surface of the spiral filter 60 facing the top 101 of the outer cylinder 10 .

The fourth preferred embodiment of the invention is roughly the same as the third preferred embodiment, the difference is that, as shown in Figure 7, the air filter of the fourth preferred embodiment of the invention comprises two second filter elements 50A The shapes of the two second filter elements 50 in the third preferred embodiment are different; The air guiding part 51A of the second filter element 50A is conical, and the cross-sectional shape of the air guiding part 51A has two arcs 511, and the two arcs 511 are recessed toward the axis L1 of the outer cylinder 10; each of the second The guide portion 52A of the filter element 50A is dome-shaped, so that the cross-section of the guide portion 52A of each of the second filter elements 50A is arcuate as shown in FIG. 4 .

Through the above-mentioned technical features, the air filter of this creation has the following efficiency gains:

1. The air filter of the present invention utilizes the ring cover 30 installed in the outer cylinder 10 to allow air to easily form turbulent flow due to collision after entering the outer cylinder 10 and pass through the first filter element 40 And the shape and structure of the second filter element 50 increases the number of collisions and the collision area when the air flows, making it easier for moisture, fine particles or other impurities in the air to be filtered out due to the characteristics of inertial impact and gravity settlement. Creation can use this to improve the efficiency of air filtration.

2. The air filter of this creation uses a simple structure and the physical characteristics of the fluid to achieve the filtering effect. It is easy to manufacture and easy to clean, and the filtered water, fine particles or other impurities are not filtered out due to the gravity factor and the first filter The structure of the member 40 and the second filter member 50 is automatically collected downwards to the bottom 102 of the outer cylinder 10. This invention does not need to replace the filter material, which can reduce maintenance costs.

In the preferred embodiment of this creation, two first filter elements 40 and more than two second filter elements 50 are used to match, but in fact only at least one first filter element 40 and at least one A staggered arrangement of the second filter elements 50 can achieve the effect of increasing the number of collisions and the collision area when the air flows, so the actual number of the first filter elements 40 and the second filter elements 50 is not limited by the above-mentioned limited by preferred embodiments.

The above is only a preferred embodiment of this creation, and does not limit this creation in any form. Anyone with ordinary knowledge in the technical field can use this creation without departing from the scope of the technical solutions proposed in this creation. Creation of equivalent embodiments with partial changes or modifications made to the disclosed technical content, and without departing from the content of the technical solution of the creation, all still fall within the scope of the technical solution of the creation.

10: Outer cylinder 101: top 102: bottom 11: Air inlet 12: Exhaust port 13: discharge channel 20: switch valve 30: ring cover 31: Airflow inlet 40: The first filter 41: Airflow port 50,50A: Second filter element 501: connecting arm 51,51A: Air guide 511: arc 52,52A: Guidance Department 60: spiral filter 601: connecting arm L1: axis line S1: Flow space

Fig. 1 is a side sectional view of the first preferred embodiment of the present invention. Fig. 2 is the three-dimensional structural diagram inside the ring cover of the first preferred embodiment of the creation. Fig. 3 is a gas flow diagram when the first preferred embodiment of the invention is in use. Fig. 4 is the side sectional view of the second preferred embodiment of the present invention. Fig. 5 is a side sectional view of the third preferred embodiment of the present invention. Fig. 6 is the three-dimensional structure diagram inside the ring cover of the third preferred embodiment of the present invention. Fig. 7 is a side sectional view of the fourth preferred embodiment of the present invention.

10: Outer cylinder

101: top

102: bottom

11: Air inlet

12: Exhaust port

13: exhaust channel

20: switch valve

30: ring cover

31: Airflow inlet

40: The first filter

41: Airflow port

50: Second filter element

51: Gas guide

52: Guidance Department

L1: axis line

S1: Flow space

Claims (9)

An air filter, which includes: an outer cylinder, which includes an air inlet and an exhaust port, the air inlet passes through the peripheral wall of the outer cylinder and communicates with the inside of the outer cylinder; the top of the outer tube, and communicate with the inside of the outer tube; a ring cover, which is arranged inside the outer tube, and extends from the top of the outer tube toward the bottom of the outer tube in a tubular shape, the ring cover and the outer tube An annular flow space is formed between the cylinders and communicates with the air inlet of the outer cylinder, and the inside of the ring cover communicates with the exhaust port of the outer cylinder; at least one first filter element, each of the first filter elements It is in the shape of a ring cone, surrounding the inner wall of the ring cover and tapering toward the bottom of the outer cylinder, each of the first filter elements is provided with an air flow port; and at least one second filter element, each of which is received by the second filter element Surrounded by the shroud, the at least one second filter element and the at least one first filter element are staggered along the axis of the outer cylinder, so that the airflow port of the at least one first filter element is subjected to the at least one second filter element. There is a gap between each of the second filter elements and the ring cover, and includes an air guide part, which is formed on the side of the second filter element near the bottom of the outer cylinder, and the air guide part The part is conical, and the tip of the air guiding part faces the bottom of the outer cylinder. The air filter according to claim 1, wherein each of the second filter elements includes a guide portion formed on the side of the second filter element close to the top of the outer cylinder, and the guide portion The leading part protrudes toward the exhaust port of the outer cylinder. The air filter as described in claim 1 or 2, which further includes a spiral filter, which is surrounded by the ring cover and has a gap with the ring cover; the spiral filter is along the outer tube The axis extends to form a helical curved surface, and gradually expands towards the top of the outer cylinder. The air filter according to claim 3, wherein the air guiding portion of each of the second filter elements is conical. The air filter according to claim 4, wherein the guide portion of each of the second filter elements is conical. The air filter according to claim 4, wherein the guide portion of each of the second filter elements is dome-shaped, so that the cross-section of the guide portion of each of the second filter elements is arcuate. The air filter according to claim 3, wherein the section of the air guiding part of each of the second filter elements has two arcs, and the two arcs are recessed toward the axis of the outer cylinder. The air filter according to claim 7, wherein the guide portion of each of the second filter elements is conical. The air filter according to claim 7, wherein the guide portion of each of the second filter elements is dome-shaped, so that the cross-section of the guide portion of each of the second filter elements is arcuate.

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