CN219399431U - Purification structure for prolonging service life of rear filter element - Google Patents
Purification structure for prolonging service life of rear filter element Download PDFInfo
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- CN219399431U CN219399431U CN202320579173.8U CN202320579173U CN219399431U CN 219399431 U CN219399431 U CN 219399431U CN 202320579173 U CN202320579173 U CN 202320579173U CN 219399431 U CN219399431 U CN 219399431U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model discloses a purifying structure for prolonging service life of a rear filter element, which comprises a box body, wherein the box body is provided with an air inlet, an air outlet and an air channel formed between the air inlet and the air outlet, a front-end air filter, a fan and a high-efficiency air filter are sequentially arranged in the air channel, at least one side of the air channel is provided with a backflow channel which is separated from the air channel, one end of the backflow channel is communicated with a front channel part of the high-efficiency air filter through an inlet of the backflow channel, and the other end of the backflow channel is communicated with the front channel part of the front-end air filter through an outlet of the backflow channel. The air channel of the air purifier can guide a part of air filtered by the front-end air filter to flow back to the front-end air filter for secondary front-end filtration, so that the utilization rate of the front-end air filter is improved.
Description
Technical Field
The utility model relates to the field of air purification, in particular to a purification structure capable of guiding part of air filtered by a front-end air filter to flow back to the front-end air filter for secondary front-end filtration and prolonging the service life of a rear filter element.
Background
The high-efficiency air filter (High Efficiency Particulate Air Filter, HEPA for short) has extremely high filtration efficiency on fine pollutants such as smoke, greasy dirt, dust, bacteria and the like in the air. Air passes through the high-efficiency air filter after being pressurized by the fan, and pollutants with small size in the air collide with substances around the pores of the filter material of the high-efficiency air filter or are diffused to the surrounding walls of the pores to be adsorbed by the pore walls so as to be separated from the air.
Although the high-efficiency air filter can efficiently intercept pollutants in the air, the pores of the high-efficiency air filter are easily blocked by the particle pollutants with larger size in the air, so that the service life of the high-efficiency air filter is shortened. High efficiency air filters are expensive and frequent replacement of high efficiency air filters is not an economical practice.
To achieve both air filtration efficiency and cost of use, the high efficiency air filter in an air purifier is typically located at the end of the filtration system, with at least one relatively inexpensive front end air filter often being provided in front of the high efficiency filter, i.e., front end air filter is in front of, and behind the high efficiency air filter. The front-end air filter intercepts larger particle pollutants in the air, relieves the pressure of the subsequent high-efficiency air filter and prolongs the service life of the high-efficiency air filter. Front-end air filters, for example, include any one or combination of a primary air filter and a secondary air filter.
The service life of the high-efficiency air filter is related to the quality of the front-end air filter and the utilization rate of the front-end air filter. If the utilization rate of the front-end air filter can be increased, the life pressure of the high-efficiency air filter can be further reduced.
Disclosure of Invention
In order to further improve the utilization rate of the front-end air filter, relieve the pressure of the high-efficiency air filter and prolong the service life of the high-efficiency air filter element, the utility model provides a purifying structure capable of guiding a part of air filtered by the front-end air filter to flow back to the front-end air filter for secondary front-end filtration and improving the service life of the rear-end filter element.
The utility model provides an improve purification structure of rearmounted filter core life-span, includes the box, and the box has air inlet, gas outlet and forms the air channel between air inlet and gas outlet, is equipped with front end air cleaner, fan and high-efficient air cleaner in proper order in the air channel, and at least one side of air channel is equipped with the backward flow passageway that separates with air channel, and the one end of backward flow passageway is linked together with high-efficient air cleaner's front portion through the backward flow passageway entry, and the other end of backward flow passageway is linked together with front end air cleaner's front portion through the backward flow passageway export.
In some embodiments, the outer wall of the case is provided with a cover plate covering a return channel inlet and a return channel outlet formed at the side of the case, the cover plate and the side of the case are spaced apart and the periphery of the cover plate is hermetically connected with the side of the case to form a return channel between the cover plate and the side of the case.
In some embodiments, a fan chamber is formed between the front end air filter and the high-efficiency air filter, a mounting plate crossing the cross section of the fan chamber is arranged in the fan chamber, an air passing port is arranged in the middle of the mounting plate, a fan is arranged at the air passing port, and a front channel part of the high-efficiency air filter is formed between the mounting plate and the high-efficiency air filter.
In some embodiments, the sides of the cabinet include removable baffles that assist in separating the return passage from the air passage, the ends of the baffles forming a boundary of the return passage inlet.
In some embodiments, the box body comprises a side wall and a bottom wall arranged at the lower end of the side wall, the side wall and the bottom wall are spliced in a sealing manner and are enclosed into a linear air channel extending vertically; the air inlet sets up the lower extreme at the lateral wall of box, and the gas outlet sets up the upper end at the top or the lateral wall of box.
In some embodiments, the side walls include a front wall, a rear wall opposite the front wall, a left wall connecting the front wall to the left of the rear wall, and a right wall connecting the front wall to the right of the rear wall, and the return channel is disposed on any one or more of the front wall, the rear wall, the left wall, and the right wall.
In some embodiments, the front end air filter comprises any one of a primary air filter, a secondary air filter, or a combination thereof.
In some embodiments, the return channel has one; alternatively, the return channel has more than one return channel, which is arranged on one or more sides of the air channel.
In some embodiments, the air inlet and the air outlet are provided with louvers or gratings, respectively.
The fan sucks air outside the purification structure for prolonging the service life of the rear filter element into the air channel from the air inlet, the air enters the front channel part of the high-efficiency air filter after being filtered by the front end air filter, and part of the air passes through the high-efficiency air filter to form clean air to be discharged from the air outlet. Meanwhile, due to the blocking of the high-efficiency air filter, the other part of air in the front channel part of the high-efficiency air filter is not passed through the high-efficiency air filter, and the air flows along a path with smaller flow resistance, namely enters the backflow channel from the backflow channel inlet and enters the front channel part of the front air filter through the backflow channel outlet, is mixed with the air in the front channel part of the front air filter and is filtered by the front air filter again, so that the utilization rate of the front air filter is improved.
Drawings
FIG. 1 is a perspective view of a purification structure for improving the life of a post-cartridge according to one embodiment of the present utility model.
FIG. 2 is a cross-sectional view of a purification structure for improving the life of a post-cartridge in accordance with one embodiment of the present utility model.
FIG. 3 is an exploded view of a cover plate and a housing of a purification structure for improving the life of a post-cartridge according to an embodiment of the present utility model.
FIG. 4 is a flow chart of a cleaning structure for improving the life of a post-filter element according to an embodiment of the present utility model in use.
Symbol description:
the purification structure 1, the case 2, the air inlet 3, the air outlet 4, the air passage 5, the front end air filter 6, the HEPA filter 7, the blower 8, the first air chamber 9, the second air chamber 10, the partition 11, the return passage 12, the return passage inlet 13, the return passage outlet 14, the side wall 15, the bottom wall 17, the blower chamber 22, the cover plate 23, the mounting plate 24, the air outlet 25, the first portion 26, the second portion 27, the plate portion 28, the side wall portion 29
Detailed Description
In order to further improve the utilization rate of the front-end air filter, relieve the pressure of the high-efficiency air filter and prolong the service life of the high-efficiency air filter element, the utility model provides a purifying structure capable of guiding a part of air filtered by the front-end air filter to flow back to the front-end air filter for secondary front-end filtration and improving the service life of the rear-end filter element.
The utility model is described in further detail below with reference to the accompanying drawings.
In one embodiment, referring to fig. 1-4, a purification structure 1 for improving the life of a post-filter cartridge includes a housing 2, the housing 2 having an air inlet 3, an air outlet 4, and an air passage 5 formed between the air inlet 3 and the air outlet 4. A front air filter 6 and a high efficiency air filter 7 are arranged in the air passage 5 in order along the main air flow direction. A fan 8 is also arranged in the air channel 5.
The front-end air filter 6 and the high-efficiency air filter 7 divide the air passage 5 into a number of physical spaces. With reference to the main air flow direction, the number of physical spaces comprises at least a front section of the front air filter 6 upstream of the front air filter 6 and directly adjacent to said front air filter 6, a front section of the high efficiency air filter 7 upstream of the high efficiency air filter 7 and directly adjacent to said high efficiency air filter 7. Wherein the main air flow direction is that air sequentially passes through the air inlet 3, the front-end air filter 6, the high-efficiency air filter 7 and the air outlet 4. For example, in the embodiment shown in fig. 2, the front portion of the front air filter 6 is the first air chamber 9 shown, and the front portion of the high efficiency air filter 7 is the second air chamber 10 shown.
At least one side of the air passage 5 is provided with a return passage 12 spaced from the air passage 5, one end of the return passage 12 communicates with the front passage portion of the high-efficiency air filter 7 through a return passage inlet 13, and the other end of the return passage 12 communicates with the front passage portion of the front-end air filter 6 through a return passage outlet 14.
The purification structure of this embodiment for improving the life of the post-filter cartridge forms a main air flow direction along the air inlet 3, the front-end air filter 6, the high-efficiency air filter 7, and the air outlet 4, and forms a bypass return passage 12 opposite to the main air flow direction between the front-passage portion of the high-efficiency air filter 7 and the front-passage portion of the front-end air filter 6. The dashed line a as shown in fig. 4 is the main air flow direction and the dotted line B is the circulating air flow direction. The fan 8 sucks air outside the purification structure 1 from the air inlet 3 into the air passage 5, and the air is filtered by the front air filter 6 and then reaches the front portion of the high efficiency air filter 7. A portion of the air in the front portion of the hepa filter 7 is passed through the hepa filter 7 by the fan 8 to form clean air which is discharged through the air outlet 4. At the same time, the air of the front-end air filter 6 is continuously sucked into the front-end portion of the high-efficiency air filter 7. Due to the blocking of the high efficiency air filter 7, another part of the air in the front section of the high efficiency air filter 7 does not pass through the high efficiency air filter 7, and flows along a path with smaller resistance, namely enters the return channel 12 from the return channel inlet 13 and enters the front section of the front air filter 7 through the return channel outlet 14, is mixed with newly sucked air, and is filtered by the front air filter 6 again, so that the utilization rate of the front air filter 6 is improved.
In one embodiment, the outer wall of the case 2 is provided with a cover plate 23, the cover plate 23 covering the return channel inlet 13 and the return channel outlet 14 formed at the side of the case 2, the cover plate 23 and the side of the case 2 having a space therebetween and the peripheral edge of the cover plate 23 being hermetically connected with the side of the case 2 to form the return channel 12 between the cover plate 23 and the side of the case 2. The side of the front section of the high-efficiency air filter 7 has a return passage inlet 13 formed in the case 2, and the side of the front section of the front air filter 6 has a return passage outlet 14 formed in the case 2. The cover plate 23 encloses a flat return channel 12 against the outer wall of the housing 2 on the side of the housing 2, which return channel 12 is separated from the air channel 5 both by the side of the housing 2 and by the return channel inlet 13 and the return channel outlet 14.
In one embodiment, a fan chamber 22 is formed between the front air filter 6 and the high-efficiency air filter 7, a mounting plate 24 crossing the cross section of the fan chamber 22 is arranged in the fan chamber 22, an air passing opening 25 is arranged in the middle of the mounting plate 24, a fan 8 is arranged at the air passing opening 25, and a front channel part of the high-efficiency air filter 7 is formed between the mounting plate 24 and the high-efficiency air filter 7. The mounting plate 24 divides the fan chamber 22 into a first portion 26 and a second portion 27. The first portion 26 is located upstream of the hepa filter 7 and directly adjacent to the hepa filter 7, with reference to the main direction of movement of the air flow, i.e. the first portion 26 is the front channel portion of the hepa filter 7. The second portion 27 is located downstream of the front air filter 6 and immediately adjacent to the front air filter 7, i.e. the second portion 27 is a subsequent portion of the front air filter 7. A return air duct inlet 13 is formed in a side wall of the case 2 at a position corresponding to the first portion 26, and a return air duct outlet 14 is formed in a side wall of the case 2 at a position corresponding to the second portion 27. The air filtered by the front air filter 7 enters the second section 27, i.e. the rear section of the front air filter 7, and is sucked by the fan 8 into the first section 26, i.e. the front section of the high efficiency air filter 7. A portion of the air in the first portion 26 passes through the high efficiency air filter 7 and is filtered by the finer filter media to form clean air that is discharged through the air outlet 4. On the other hand, due to the blocking of the high efficiency air filter 7, the other part of the air in the first part 26 does not pass through the high efficiency air filter 7, and flows along a path with smaller resistance, namely, enters the return channel 12 from the return channel inlet 13 on the side of the first part 26, enters the front channel part of the front air filter 6 through the return channel outlet 14, is mixed with the newly sucked air, and is filtered by the front air filter 6 again, so that the utilization rate of the front air filter 6 is improved.
The cover plate 23 is connected with the side surface of the box body 2 in a sealing way. The cover plate 23 covers the side of the case 2 and entirely covers the return passage inlet 13 and the return passage outlet 14 formed at the side of the case 2. The cover plate 23 encloses the return channel 12 on the side of the housing 2.
In one embodiment, the cover plate 23 includes a plate portion 28 and a side wall portion 29 formed at the periphery of the plate portion 28. The plate surface part 28 is separated from the side surface of the box body 2, and the side wall part 29 is connected with the box body 2 in a sealing way, so that air leakage at the joint of the side wall part 29 and the box body 2 is prevented. Preferably, the side wall portion 29 is detachably connected to the case 2 by a fastener, for example, the side wall portion 29 has a flange connected to the case 2 by a bolt, and a joint of the side wall portion 29 and a side face of the case 2 is sealed by a sealing strip. In other embodiments, the side wall 29 may be fixed to the side of the case 2 by welding, that is, a continuous weld may be formed along the junction between the side wall 29 and the case 2, so that the cover 23 may be connected to the case 2, and the sealing effect may be achieved, but the cover 23 may not be detachable.
In one embodiment, a socket with a slot is provided on at least 3 sides of the area to be covered by the cover plate 23, and a slot entrance is provided on the other side. The cover plate 23 is inserted into the socket from the slot inlet, so that the cover plate 23 is fixed and is not easy to leak air.
In one embodiment, the case 2 includes a side wall 15 and a bottom wall 17. The side wall 15 and the bottom wall 17 are joined in a sealed manner and enclose the air channel 5. The edge joint of the side wall 15 and the bottom wall 17 is provided with a sealing strip such as a rubber strip or a foam strip, so that the influence of air leakage on the pressure in the air channel 5 is avoided, and noise generated when air flows through the narrow slit can also be avoided.
In one embodiment, referring to fig. 2 and 4, the case 2 and the air passage 5 are constructed in a rectangular parallelepiped shape. For example, the side wall 15 includes a front wall, a rear wall opposite to the front wall, a left wall connecting the front wall and the rear wall to the left, and a right wall connecting the front wall and the rear wall to the right. The side walls 15 of the present embodiment define a vertically straight air passage 5 of square cross section. The standard filter consists of a square frame and a filter material embedded in the frame, so that the standard filter can be perfectly adapted to an air channel 5 having a square cross section. The front wall, the rear wall, the left wall and the right wall are spliced in a sealing mode, namely, sealing materials such as rubber strips or foam strips are arranged at the splice, so that air in the purification structure 1 is prevented from leaking from the splice or external air enters the purification structure 1 through the splice, the pressure intensity in the air channel 5 is influenced, and noise generated when the air flows through the narrow slit can be avoided.
In other embodiments, the housing 2 and air passage 5 may be configured in other shapes, such as a side wall 15 of the housing 2 enclosing a square cross-section but having a shape with a bent structure such as an L-shape, an inverted T-shape, or the like.
In other embodiments, the case 2 may be provided with a more varied three-dimensional shape, for example, the case 2 and the air passage 5 surrounded by the side walls 15 may be configured to have a circular, six-deformed or other regular or irregular geometric shape in cross section. For air channels 5 that are non-square in cross-section, it is often necessary to customize the front end air filter 6 and the high efficiency air filter 7 to fit the non-square air channel 5 cross-section, which can increase the difficulty and cost of filter manufacture.
In one embodiment, the air inlet 3 is provided on a wall of the lower end of the casing 2 and the air outlet 4 is provided on a wall of the upper end of the casing 2. For example, the air inlet 3 is provided at the lower end of the side wall 15 and the air outlet 4 is provided at the upper end or top of the side wall 15. Further, in one embodiment, the side walls 15 include a front wall, a rear wall, a left wall, and a right wall. The air inlet 3 is provided at the lower end of any one or more of the front wall, the rear wall, the left wall, and the right wall. The air outlet 4 is arranged at the upper end of any one or more of the front wall, the rear wall, the left wall and the right wall, or the upper ends of the front wall, the rear wall, the left wall and the right wall are enclosed to form the air outlet 4.
In one embodiment the air inlet 3 is provided with louvers or grilles (not shown) which allow the flow of air to pass and which are capable of intercepting the flotage. The louvers or gratings are capable of intercepting the air from the air, such as plastic film, flock, etc., avoiding that the air is sucked into the purification structure 1 to clog the holes of the front air filter 6.
In one embodiment, the air outlet 4 is provided with a shutter or grille (not shown in the figures). Especially in case the air outlet 4 is provided at the top end of the cabinet 2 and directed upwards, the louver or grille allows both the clean air in the purification structure 1 to be discharged from the air outlet 4 and to intercept floating objects such as plastic films, flocks, etc. in the air when the purification structure 1 is not activated, preventing the floating objects from falling onto the high efficiency air filter 7 in the purification structure 1 through the air outlet 4 to clog the high efficiency air filter 7. Preferably, the ventilation channels of the louvers or gratings are configured with a slope that further prevents dust in the air from falling through the air outlet 4 onto the high efficiency air filter 7 when the purification structure 1 is not activated.
In one embodiment, the front end air filter 6 comprises any one or combination of a primary air filter and a secondary air filter. Specifically, the front-end air filter 6 may be one of a primary air filter and a medium-efficiency air filter, and may include both the primary air filter and the medium-efficiency air filter. When the front end air filter 6 includes both the primary air filter and the secondary air filter, the secondary air filter is disposed at a position downstream of the primary air filter, i.e., downstream of the primary air filter. The person skilled in the art can select the primary air filter and the intermediate air filter which are common in the art according to the need by referring to the comprehensive factors such as the use environment, the filtering requirement, the cost requirement and the like.
In one embodiment, the front end air filter 6 comprises one primary air filter or a superposition of two primary air filters. In one embodiment, the front end air filter 6 comprises one or two medium-efficiency air filters in superposition.
The primary air filter and the intermediate air filter are basically the same as the high-efficiency air filter 7 in structure, namely, comprise a frame and filter media embedded in the frame for filtering. The filter element made of common materials in the market can be applied to the purification structure of the present disclosure, such as glass fiber, chemical fiber (e.g. hot melt adhesive), activated carbon, photocatalyst, etc. The high efficiency air filter 7 is smaller in filter media pore size than the medium efficiency air filter, which is smaller than the primary air filter. The high efficiency air filter 7 has a higher filtration efficiency for air pollutants of smaller particle size (such as PM 2.5), while the primary and intermediate efficiency air filters have a higher filtration efficiency for relatively larger particles. The price of the high-efficiency air filter 7 is significantly higher than that of the primary and medium-efficiency air filters. The primary air filter and/or the middle-effect air filter with relatively low price are matched with the high-efficiency air filter 7 with extremely high filtering efficiency, larger particle pollutants in the air are filtered, the pressure of the subsequent high-efficiency air filter 7 is reduced, the service life of the high-efficiency air filter 7 is prolonged, and the use cost of the purification structure 1 is saved.
In one embodiment, the return channel 12, which communicates the second air chamber 10 with the first air chamber 9, has one or more. When the number of the return passages 12 is more than one, these return passages 12 may be provided on the same side of the air passage 5 or may be provided on different sides of the air passage 5. Taking the rectangular parallelepiped case 2 as an example, the rectangular parallelepiped case 2 defines a rectangular parallelepiped air passage 5, and in an embodiment having only one return passage 12, the return passage 12 is provided on any one of the front wall, the rear wall, the left wall, and the right wall of the case 2. In embodiments having more than one return channel 12, all of the return channels 12 may be disposed on any of the front, rear, left, and right walls, or may be disposed equally or unequally on at least two of the front, rear, left, and right walls.
In one embodiment, referring to fig. 3, the side of the cabinet 2 includes a removable partition 11 that participates in separating the return passage 12 from the air passage 5, and the end of the partition 11 forms one boundary of the return passage inlet 13. The partition 11 is interposed between the air passage 5 and the return passage 12, and defines a partial boundary of the air passage 5 on the one hand and serves as a boundary of the return passage 12 on the other hand. The partition 11 is detachable, and the partition 11 is fixed to the case 2 by, for example, fasteners such as bolts. Since the partition 11 is detachable and the partition 11 serves as one boundary of the return passage inlet 13, the position of the end of the partition 11 changes when a user replaces the partition 11 of a different length. As in the embodiment shown in fig. 3, the size of the return channel inlet 13 is reduced when the longer partition 11 is installed, and the size of the return channel inlet 13 is increased when the shorter partition 11 is installed. The user can use the baffle 11 of different length according to the demand to the size of this adjustment back flow channel entry 13 reaches the reasonable distribution's of control air output and circulation amount of wind purpose. The air output is the clean air quantity discharged by the air purifier, and the circulating air quantity is the air quantity circulated to the front-end air filter 6 through the return channel for secondary filtration. Specifically, the length of the baffle plate is prolonged, so that the size of the inlet of the backflow air passage can be reduced, and the circulating air quantity is further reduced; and shortening the length of the partition plate can increase the size of the inlet of the backflow air passage and increase the circulating air quantity.
For a conventional air purifier, the rated clean air quantity of the air purifier design is assumed to be 400m 3 And/h, the environmental pollution concentration is 1mg/m 3 The front-end air filter had a filtration efficiency of 70%, assuming 400m 3 The air quantity/h is filtered by the front-end air filter and then directly passes through the high-efficiency air filter again, the service life of the high-efficiency air filter is 6 months, namely the high-efficiency air filter processes 400m 3 A contaminant concentration of 0.3mg/m3 per hour may be used for 6 months.
For the air purifier of the utility model, assuming that the fan can provide 800m3/h of air suction amount and the circulating air quantity between the fan and the front-end air filter is 400m3/h, the air quantity passing through the high-efficiency air filter is 400m 3 And/h. The concentration was calculated as follows:
after the polluted air of 1mg/m3 of 400m3/h is sucked by the purifier, the polluted air is changed into a mixture of the polluted air of 0.3mg/m3 of 400m3/h and the polluted air of 0.09mg/m3 of 400m3/h after being circulated once by the front end filter element, the average mixed pollutant concentration is assumed to be (0.3+0.09)/2=0.195 mg/m3, so that the pollutant concentration of 0.195mg/m3 representing the treatment of 400m3/h by the high-efficiency air filter can be used for about 8 months, which is more than two months than the original 6 months, and the later maintenance cost is saved by one third.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (9)
1. The utility model provides an improve purification structure of rearmounted filter core life-span, its characterized in that, includes the box, the box has air inlet, gas outlet and forms the air channel between the air inlet with the gas outlet, be equipped with front end air filter, fan and high-efficient air filter in the air channel in proper order, at least one side of air channel be equipped with the return channel that air channel separates mutually, the one end of return channel pass through the return channel entry with high-efficient air filter's front portion is linked together, the other end of return channel pass through the return channel export with front end air filter's front portion intercommunication.
2. The structure according to claim 1, wherein the outer wall of the housing is provided with a cover plate covering the return passage inlet and the return passage outlet formed at the side surface of the housing, the cover plate and the side surface of the housing are spaced apart from each other and the peripheral edge of the cover plate is hermetically connected to the side surface of the housing to form the return passage between the cover plate and the side surface of the housing.
3. The purifying structure for improving service life of a post-filter cartridge according to claim 1 or 2, wherein a fan chamber is formed between the front-end air filter and the high-efficiency air filter, a mounting plate crossing the cross section of the fan chamber is arranged in the fan chamber, an air outlet is arranged in the middle of the mounting plate, the fan is arranged at the air outlet, and a front channel part of the high-efficiency air filter is formed between the mounting plate and the high-efficiency air filter.
4. The filter cartridge life enhancing purification structure of claim 1 or 2, wherein the side of the housing includes a removable partition that participates in separating the return passage from the air passage, the end of the partition forming a boundary of the return passage inlet.
5. The purifying structure for improving service life of a post-filter element according to claim 1 or 2, wherein the box body comprises a side wall and a bottom wall arranged at the lower end of the side wall, the side wall and the bottom wall are spliced in a sealing manner and are enclosed into a linear air channel extending vertically; the air inlet is arranged at the lower end of the side wall of the box body, and the air outlet is arranged at the top of the box body or the upper end of the side wall.
6. The filter cartridge life enhancing purification structure of claim 5, wherein said side walls include a front wall, a rear wall opposite said front wall, a left wall connecting said front wall to the left of said rear wall, and a right wall connecting said front wall to the right of said rear wall, said return channels being provided on any one or more of said front wall, rear wall, left wall, right wall.
7. The purifying construction for improving the life of a post-cartridge of claim 1 or 2, wherein the front end air filter comprises any one of a primary air filter, a medium efficiency air filter, or a combination thereof.
8. The purification structure for improving the life of a post-filter cartridge according to claim 1 or 2, wherein the return passage has one; alternatively, the return channel has more than one, the return channel being disposed on one or more sides of the air channel.
9. The purifying structure for improving life of a post-filter cartridge according to claim 1 or 2, wherein the air inlet and the air outlet are provided with a louver or a grill, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320579173.8U CN219399431U (en) | 2023-03-22 | 2023-03-22 | Purification structure for prolonging service life of rear filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320579173.8U CN219399431U (en) | 2023-03-22 | 2023-03-22 | Purification structure for prolonging service life of rear filter element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219399431U true CN219399431U (en) | 2023-07-25 |
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ID=87239444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320579173.8U Active CN219399431U (en) | 2023-03-22 | 2023-03-22 | Purification structure for prolonging service life of rear filter element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219399431U (en) |
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2023
- 2023-03-22 CN CN202320579173.8U patent/CN219399431U/en active Active
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