Air purification filter

Abstract

The invention relates to an air purification filter which comprises a stainless steel shell, a first temperature sensing device coaxial with the stainless steel shell is inserted into the stainless steel shell, inert gas is contained in the first temperature sensing device, a plurality of catalytic units are fixedly connected to the first temperature sensing device, and in the automobile running process, high-temperature waste gas can be generated; the temperature sensing device I is heated, the most part of the elastic main body is ejected out of the temperature sensing device I, so that the most part of the elastic main body is turned over, the catalyst coating extends out, is in contact with high-temperature waste gas and is used for catalyzing and purifying the waste gas, and the catalyst coating playing a catalytic role is fixed on the elastic main body and cannot be discharged along with the purified waste gas; when the vehicle runs, the catalyst coating is not easy to cause new environmental pollution, and when the vehicle does not run, the catalyst coating is hidden, is not easy to directly contact with the external environment, is not easy to be polluted by the external environment, and is not easy to influence the catalytic effect.

Description

Technical Field

[0001] The present invention relates to an air purification filter, in particular to an air purification filter used in the field of engine exhaust devices. Background Art

[0002] At present, ordinary automobile exhaust air purification filters use catalysts to react with NO, NO2 and CO in automobile exhaust to generate CO2 and N2, two pollution-free gases. However, when the vehicle is working normally, in addition to emitting NO, NO2 and CO, it also emits smoke formed by incomplete combustion of gasoline, which can easily pollute the catalytic unit and affect its catalytic effect.

[0003] The specification of Chinese invention patent CN109630240B discloses an air purification filter, which includes an exhaust gas diffusion purification device, which includes a filter shell, the filter shell is made of stainless steel material, an air inlet pipe is arranged on one side of the filter shell, a fixing rod is arranged inside the filter shell, a bearing is arranged inside the fixing rod, a rotating shaft is arranged inside the bearing, a spiral diffusion blade is arranged on the outer side of the rotating shaft, an air guide groove is arranged on the surface of the spiral diffusion blade, a first filter plate is arranged on the top of the fixing rod, the first filter plate is fixedly connected to the inner wall of the filter shell, an exhaust gas neutralization cavity is arranged on the top of the first filter plate, an air pipe is arranged on the top of the filter shell, the air pipe passes through the filter shell and extends to the exhaust gas neutralization cavity, and the exhaust gas diffusion purification device is arranged in the present invention, which is beneficial to buffering the high-speed sprayed automobile exhaust, increasing the reaction time of the catalyst with NO, NO and CO in the automobile exhaust, improving the reaction efficiency, and thus improving the filtering effect of the automobile exhaust.

[0004] In the above invention, when the catalyst is used to perform pollution-free treatment on automobile exhaust, the catalyst will be mixed in the treated exhaust gas and then directly discharged into the air, and the residual catalyst is likely to pollute the environment and form a new pollution source.

[0005] Application Contents

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when the catalyst is used to perform pollution-free treatment on automobile exhaust gas, the catalyst will be mixed in the treated exhaust gas and then directly discharged into the air, and the residual catalyst is likely to pollute the environment and form a new source of pollution.

[0007] To solve the above problems, the present invention provides an air purification filter, including a stainless steel shell, two ends of the stainless steel shell are fixedly connected with an air inlet and an air outlet, the stainless steel shell is connected to the outside through the air inlet and the air outlet, a temperature sensing device coaxial with the stainless steel shell is inserted in the stainless steel shell, a plurality of connecting piles are fixed between the temperature sensing device and the stainless steel shell, an inert gas is present in the temperature sensing device, and the inert gas pressure in the temperature sensing device is less than the standard atmospheric pressure, a plurality of through holes are drilled on the outer wall of the temperature sensing device, a catalytic unit matching the temperature sensing device is fixedly connected in the plurality of through holes, the catalytic unit includes an elastic main body, a reinforcing net is fixedly connected to the side wall at one end of the elastic main body connected to the internal environment of the temperature sensing device, and a catalyst coating is fixedly connected to the side wall at one end of the elastic main body connected to the external environment of the temperature sensing device.

[0008] In the above-mentioned air purification filter, the catalyst coating that plays a catalytic role is fixed on the elastic main body and will not be discharged with the purified exhaust gas, so it is not easy to induce new environmental pollution problems. At the same time, when the vehicle is not driving, the catalyst coating will be hidden, and it is not easy to come into direct contact with the external environment, and it is not easy to be polluted by the external environment, and it is not easy to affect its catalytic effect.

[0009] As a further improvement of the present application, a plurality of guide plates are fixedly connected to the inner wall of the stainless steel shell, and the positions of the plurality of guide plates respectively match the positions of the plurality of non-catalytic units. The guide plates are inclined toward the catalytic unit from the inner wall of the stainless steel shell toward the direction of the outer wall of the temperature sensing device. During the flow of the automobile exhaust gas, the automobile exhaust gas is guided to make it easier for it to contact with the catalytic unit and be purified by the catalytic unit.

[0010] As a further improvement of the present application, the guide plate includes a hard plate body, and a plurality of guide grooves matching the catalytic unit are formed at one end of the hard plate body close to the air inlet, so as to further enhance the guiding effect of the guide plate on automobile exhaust.

[0011] As a further improvement and supplement to the present application, a temperature sensing device 2 is also provided in the stainless steel shell. The temperature sensing device 2 is coaxial with the stainless steel shell. The temperature sensing device 2 includes a non-elastic shell. The non-elastic shell is filled with an inert gas below the standard atmospheric pressure. An installation groove is drilled at one end of the non-elastic shell close to the air inlet. A connecting pipe is fixedly connected between the air inlet and the installation groove. The connecting pipe includes a tube body. A notch groove is drilled at one end of the tube body close to the temperature sensing device 2. A plurality of catalytic units are fixedly connected to the outer wall of the non-elastic shell. The plurality of catalytic units all penetrate the side wall of the temperature sensing device 2, thereby increasing the contact area between the automobile exhaust gas and the temperature sensing device 2 when the exhaust gas moves to the position of the catalytic unit, thereby increasing the preheating effect of the inert gas in the temperature sensing device 2, so that the catalytic unit can quickly move from the inside of the temperature sensing device 2 to the outside of the temperature sensing device 2 after the exhaust gas is generated, thereby increasing the catalytic effect of the catalytic unit.

[0012] As a further improvement of the present application, a plurality of notched grooves are fixedly connected to inner walls with heat conducting pins, and one end of the heat conducting pin close to the temperature sensing device 2 penetrates the temperature sensing device 2 and extends into the temperature sensing device 2. Heat can be conducted to the temperature sensing device 2 through the heat conducting pins, thereby accelerating the preheating of the inert gas. Conversely, the heat of the inert gas can also be quickly dissipated through the guide plate, thereby accelerating the speed at which the catalytic unit returns to the temperature sensing device 2 after the vehicle stops working.

[0013] As a further improvement and supplement to the present application, a heat-conducting net is buried in the tube body, and the end of the heat-conducting needle close to the tube body penetrates the tube body and is fixedly connected to the heat-conducting net, further increasing the transfer effect of the connecting tube.

[0014] As another improvement of the present application, a capture unit is fixedly connected to the bottom plate of the mounting groove, and the capture unit includes a plurality of hollow elastic fibers, and the plurality of elastic fibers are overlapped with each other to form a three-dimensional structure, and the capture unit covers the notch groove. The automobile exhaust will be filtered through the capture unit to filter out the incompletely burned smoke inside the automobile, thereby reducing its pollution to the catalyst coating.

[0015] In summary, during the driving of the car, high-temperature exhaust gas will be generated, the temperature sensing device 1 will be heated, and most of the elastic body will be pushed out from the temperature sensing device 1, so that most of the elastic body will be turned over, and the catalyst coating will be extended to contact with the high-temperature exhaust gas, so as to catalyze and purify the exhaust gas. After the car stops driving, the temperature and pressure of the inert gas in the temperature sensing device 1 will drop, and most of the elastic body will be sucked into the temperature sensing device 1 again. The catalyst coating that plays a catalytic role is fixed on the elastic body and will not be discharged with the purified exhaust gas, and it is not easy to induce new environmental pollution problems. At the same time, when the vehicle is not driving, the catalyst coating will be hidden, and it is not easy to directly contact with the external environment, it is not easy to be polluted by the external environment, and it is not easy to affect its catalytic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic cross-sectional structure diagram of an air purification filter according to a first embodiment of the present application;

[0017] Figure 2 This is a schematic structural diagram of an air purification filter according to a first embodiment of the present application;

[0018] Figure 3 This is a working schematic diagram of the catalytic unit of the first embodiment of the present application when it is in a standby state;

[0019] Figure 4 This is a working schematic diagram of the catalytic unit of the first embodiment of the present application when it is in working state;

[0020] Figure 5 This is a schematic structural diagram of a guide plate according to a first embodiment of the present application;

[0021] Figure 6 This is a schematic cross-sectional structure diagram of the air purification filter in the second embodiment of the present application when it is in a standby state;

[0022] Figure 7 This is a schematic cross-sectional structure diagram of the air purification filter in the second embodiment of the present application when it is in a working state;

[0023] Figure 8 This is a side cross-sectional view of the air purification filter in the second embodiment of the present application when it is in a standby state;

[0024] Fig. 9 This is a cross-sectional schematic diagram of a connecting pipe according to a second embodiment of the present application;

[0025] Fig.10 This is a schematic structural diagram of a connecting pipe according to a second embodiment of the present application.

[0026] Description of the numbers in the figure:

[0027] 1 stainless steel shell, 2 air inlet, 3 air outlet, 4 temperature sensing device 1, 5 catalytic unit, 501 elastic body, 502 reinforcement net, 503 catalyst coating, 6 connecting pile, 7 guide plate, 701 hard plate body, 702 guide groove, 8 temperature sensing device 2, 801 non-elastic shell, 802 installation groove, 9 connecting pipe, 901 pipe body, 902 heat conduction needle, 903 heat conduction net, 904 notch groove, 10 capture unit. DETAILED DESCRIPTION

[0028] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0029] The first implementation method:

[0030] Figure 1-3 An air purification filter is shown, comprising a stainless steel shell 1, with an air inlet 2 and an air outlet 3 fixedly connected at both ends of the stainless steel shell 1, the stainless steel shell 1 is connected to the outside through the air inlet 2 and the air outlet 3, the air inlet 2 is fixedly connected to the tailpipe of a car, a temperature sensing device 4 coaxial with the stainless steel shell 1 is inserted into the stainless steel shell 1, a plurality of connecting piles 6 are fixed between the temperature sensing device 4 and the stainless steel shell 1, inert gas is present in the temperature sensing device 4, and the inert gas pressure in the temperature sensing device 4 is less than the standard atmospheric pressure, a plurality of through holes are drilled on the outer wall of the temperature sensing device 4, a catalytic unit 5 matching the temperature sensing device 4 is fixedly connected in each of the plurality of through holes, the catalytic unit 5 comprises an elastic body 501, a reinforcing net 502 is fixedly connected to the side wall at one end of the elastic body 501 connected to the internal environment of the temperature sensing device 4, and a catalyst coating 503 is fixedly connected to the side wall at one end of the elastic body 501 connected to the external environment of the temperature sensing device 4.

[0031] In particular, in the present application, for the convenience of presentation, the size and number of each structure are not drawn strictly in proportion. Those skilled in the art can reasonably design the size and number of each structure based on the existing technology and actual usage requirements. This is a common technology among those skilled in the art, and therefore is not disclosed in detail in the present application.

[0032] When the air purification filter is in standby mode, refer to Figure 3 At this time, the pressure of the inert gas in the temperature sensing device 4 is lower than the external pressure, and most of the catalytic unit 5 is sucked into the temperature sensing device 4. At this time, the catalyst coating 503 is not easy to contact with the outside world, and is not easy to be contaminated and blocked by debris in the external environment, and is not easy to affect the catalytic effect of the catalyst coating 503. During the driving of the car, high-temperature exhaust gas will be generated, which heats the temperature sensing device 4, and the pressure of the inert gas in the temperature sensing device 4 will also rise. At this time, please refer to Figure 4 , most of the elastic body 501 is pushed out from the temperature sensing device 4, so that most of the elastic body 501 is turned over, and the catalyst coating 503 is extended out of the temperature sensing device 4 to contact the high-temperature exhaust gas, catalyzing and purifying the exhaust gas. After the car stops running, the temperature and pressure of the inert gas in the temperature sensing device 4 drop accordingly, and most of the elastic body 501 is sucked into the temperature sensing device 4 again. The catalyst coating 503 that plays a catalytic role is fixed on the elastic body 501 and will not be discharged with the purified exhaust gas, and it is not easy to induce new environmental pollution problems. At the same time, when the vehicle is not running, the catalyst coating 503 will be hidden, and it is not easy to directly contact with the external environment, it is not easy to be polluted by the external environment, and it is not easy to affect its catalytic effect.

[0033] See also Figure 1 and Figure 5 A plurality of guide plates 7 are fixedly connected to the inner wall of the stainless steel shell 1, and the positions of the plurality of guide plates 7 respectively match the positions of the plurality of non-catalytic units 5. The guide plates 7 are inclined toward the catalytic unit 5 from the inner wall of the stainless steel shell 1 toward the outer wall of the temperature sensing device 4. During the flow of automobile exhaust gas, the automobile exhaust gas is guided to make it easier to contact with the catalytic unit 5 and be purified by the catalytic unit 5. The guide plate 7 includes a hard plate body 701, and a plurality of guide grooves 702 are cut at one end of the hard plate body 701 close to the air inlet 2, and the positions thereof match the catalytic unit 5, so as to further increase the guiding effect of the guide plate 7 on the automobile exhaust gas.

[0034] The second implementation method:

[0035] Figure 7-10 An air purification filter is shown, wherein a temperature sensing device 8 is further provided in a stainless steel shell 1, and the temperature sensing device 8 is coaxial with the stainless steel shell 1. The temperature sensing device 8 comprises a non-elastic shell 801, and an inert gas below the standard atmospheric pressure is filled in the non-elastic shell 801. An installation groove 802 is bored at one end of the non-elastic shell 801 close to the air inlet 2, and a connecting pipe 9 is fixedly connected between the air inlet 2 and the installation groove 802. The connecting pipe 9 comprises a tube body 901, and a notch groove 904 is bored at one end of the tube body 901 close to the temperature sensing device 8. A plurality of catalytic units 5 are fixedly connected to the outer wall of the non-elastic shell 801, and the plurality of catalytic units 5 all penetrate the side wall of the temperature sensing device 8, so as to increase the contact area between the automobile exhaust gas and the temperature sensing device 8 when the automobile exhaust gas moves to the position where the catalytic unit 5 is located, and to increase the preheating effect of the inert gas in the temperature sensing device 8, so that the catalytic unit 5 can quickly move from the temperature sensing device 8 to the outside of the temperature sensing device 8 after the exhaust gas is generated, thereby increasing the catalytic effect of the catalytic unit 5.

[0036] A plurality of notched grooves 904 are fixedly connected to inner walls with heat-conducting needles 902. One end of the heat-conducting needle 902 close to the temperature sensing device 28 penetrates the temperature sensing device 28 and extends into the temperature sensing device 28. Heat can be conducted to the temperature sensing device 28 through the heat-conducting needle 902 to accelerate the preheating of the inert gas. Conversely, the heat of the inert gas can also be quickly lost through the guide plate 7, thereby accelerating the speed at which the catalytic unit 5 returns to the temperature sensing device 28 after the vehicle stops working. A heat-conducting net 903 is buried in the tube body 901. One end of the heat-conducting needle 902 close to the tube body 901 penetrates the tube body 901 and is fixedly connected to the heat-conducting net 903, thereby further increasing the transfer effect of the connecting tube 9.

[0037] A capture unit 10 is fixedly connected to the bottom plate of the mounting groove 802. The capture unit 10 includes a plurality of hollow elastic fibers, which are overlapped with each other to form a three-dimensional structure. The capture unit 10 covers the notch groove 904. The automobile exhaust will be filtered by the capture unit 10 to filter out the incompletely burned smoke inside the automobile, thereby reducing its pollution to the catalyst coating 503.

[0038] Compared with the first implementation method, this implementation method utilizes the temperature sensing device 28 and the connecting pipe 9 to memorize the movement path of the automobile exhaust gas in the stainless steel housing 1, thereby increasing its preheating effect on the inert gas in the temperature sensing device 28, so that the catalytic unit 5 can take effect quickly, thereby increasing its catalytic effect on the automobile exhaust gas. However, the structure of the temperature sensing device 28 and the connecting pipe 9 is more complicated than that of the temperature sensing device 14, and the installation and maintenance costs thereof also increase accordingly. Those skilled in the art can reasonably select them according to actual needs.

[0039] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An air purification filter, characterized in that: The invention comprises a stainless steel shell (1), wherein two ends of the stainless steel shell (1) are fixedly connected with an air inlet (2) and an air outlet (3), the stainless steel shell (1) is connected with the outside through the air inlet (2) and the air outlet (3), a temperature sensing device (4) coaxial with the stainless steel shell (1) is inserted in the stainless steel shell (1), a plurality of connection piles (6) are fixed between the temperature sensing device (4) and the stainless steel shell (1), an inert gas is contained in the temperature sensing device (4), and the inert gas in the temperature sensing device (4) is The pressure is less than the standard atmospheric pressure, a plurality of through holes are bored on the outer wall of the temperature sensing device (4), a catalytic unit (5) matching the temperature sensing device (4) is fixedly connected in each of the plurality of through holes, the catalytic unit (5) comprising an elastic body (501), a reinforcing net (502) is fixedly connected on the side wall at one end of the elastic body (501) communicating with the internal environment of the temperature sensing device (4), and a catalyst coating (503) is fixedly connected on the side wall at one end of the elastic body (501) communicating with the external environment of the temperature sensing device (4).

2. An air purification filter according to claim 1, characterized in that: A plurality of guide plates (7) are fixedly connected to the inner wall of the stainless steel shell (1), and the positions of the plurality of guide plates (7) respectively match the positions of the plurality of non-catalytic units (5). The guide plates (7) are inclined from the inner wall of the stainless steel shell (1) toward the outer wall of the temperature sensing device (4) toward the catalytic unit (5).

3. An air purification filter according to claim 2, characterized in that: The guide plate (7) comprises a hard plate body (701), and a plurality of guide grooves (702) are formed at one end of the hard plate body (701) close to the air inlet (2) and matched with the catalytic unit (5).

4. The air purification filter according to claim 1, characterized in that: A second temperature sensing device (8) is also arranged inside the stainless steel housing (1). The second temperature sensing device (8) is coaxial with the stainless steel housing (1). The second temperature sensing device (8) comprises a non-elastic housing (801). The non-elastic housing (801) is filled with an inert gas at a pressure lower than the standard atmospheric pressure. An installation groove (802) is formed at one end of the non-elastic housing (801) close to the air inlet (2). A connecting pipe (9) is fixedly connected between the air inlet (2) and the installation groove (802). The connecting pipe (9) comprises a pipe body (901). A notch groove (904) is formed at one end of the pipe body (901) close to the second temperature sensing device (8). A plurality of catalytic units (5) are fixedly connected to the outer wall of the non-elastic housing (801). The plurality of catalytic units (5) all penetrate the side wall of the second temperature sensing device (8).

5. An air purification filter according to claim 4, characterized in that: A heat conducting needle (902) is fixedly connected to the inner wall of each of the plurality of notched grooves (904), and one end of the heat conducting needle (902) close to the second temperature sensing device (8) penetrates the second temperature sensing device (8) and extends into the second temperature sensing device (8).

6. An air purification filter according to claim 4, characterized in that: A heat-conducting net (903) is embedded in the tube body (901), and one end of the heat-conducting needle (902) close to the tube body (901) penetrates the tube body (901) and is fixedly connected to the heat-conducting net (903).

7. An air purification filter according to claim 4, characterized in that: A capture unit (10) is fixedly connected to the bottom plate of the installation groove (802), and the capture unit (10) includes a plurality of hollow elastic fibers, and the plurality of elastic fibers are overlapped with each other to form a three-dimensional structure, and the capture unit (10) covers the notch groove (904).

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