Air purifiaction assembly for laser printer
The air purification assembly for laser printers addresses low efficiency and large footprint issues by using a HEPA and active carbon filter system with a centrifugal fan and silencer, achieving improved purification and noise reduction in a compact design.
Patent Information
- Application Number
- PCT/CN2023/081277
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-03-14
- Publication Date
- 2025-12-26
AI Technical Summary
Existing air purification assemblies for laser printers have low purification efficiency and a large footprint due to the use of active carbon filters with a long tube shape.
An air purification assembly for laser printers that includes a housing with a HEPA filter and an active carbon filter, arranged downstream of the HEPA filter, and a fan to force air through these filters, optionally with a coarse filter upstream of the HEPA filter to prevent large particles, and a centrifugal fan to discharge purified air away from the operator, along with a silencer to reduce noise.
Improves purification efficiency of harmful particles and gases generated during laser printing while maintaining a compact structure and reducing noise, thus enhancing the work environment.
Smart Images

Figure CN2023081277_26122025_PF_FP_ABST
Abstract
Description
AIR PURIFIACTION ASSEMBLY FOR LASER PRINTERFIELD
[0001] The present disclosure relates to a field of laser-printing, and more particularly to an air purification assembly for a laser printer.BACKGROUND
[0002] In related art, air purification assemblies for laser printers generally include an active carbon filter having a long tube shape, which have low purification efficiency and large footprint.
[0003] SUMMARY
[0004] Embodiments of the present disclosure seek to solve at least one of the problems existing in the related art to at least some extent.
[0005] The present disclosure proposes an air purification assembly which has improved purification efficiency and smaller footprint.
[0006] The present disclosure also proposes a laser printer including the above air purification assembly.
[0007] An air purification assembly for a laser printer according to embodiments of a first aspect of the present disclosure includes a housing, a HEPA filter, an active carbon filter and a fan. The housing includes an air inlet and an air outlet. The HEPA filter is arranged in the housing. The active carbon filter is arranged in the housing and downstream of the HEPA filter. The HEPA filter and the active carbon filter are arranged downstream of the air inlet and upstream of the air outlet. The fan is coupled to the housing and configured to force air through the HEPA filter and the active filter carbon to filter the air.
[0008] In the air purification assembly according to embodiments, by providing the HEPA filter and the active carbon filter, purification efficiency of harmful particles and gases generated during laser printing of the laser printer may be improved.
[0009] In some embodiments, the air purification assembly further includes a coarse filter arranged in the housing and downstream of the air inlet and upstream of the HEPA filter, and the fan is configured to force the air through the coarse filter, the HEPA filter and the active carbon filter. The coarse filter may prevent large particles from moving into the neighboring HEPA filter, and the HEPA filter and the active carbon filter may absorb the most part of the micro particles and odor. The provision of the coarse filter may further improve the purification of the air purification assembly.
[0010] In some embodiments, the housing defines a first accommodating space in direct communication with the air inlet and configured to receive the coarse filter, a second accommodating space in direct communication with the first accommodating space and configured to receive the HEPA filter, and a third accommodating space in direct communication with the second accommodating space and the air outlet and configured to receive the active carbon filter. Thus, the housing may receive the coarse filter, the HEPA filter and the active carbon filter in place, and the air may be purified through the coarse filter, the HEPA filter and the active carbon filter in sequence.
[0011] In some embodiments, the air inlet and the air outlet are defined in two adjacent walls of the housing, and the first accommodating space, the second accommodating space and the third accommodating space are arranged sequentially along an axis of the air outlet. The air inlet and the air outlet are defined in two adjacent walls of the housing. Hence, an axis of the air inlet is perpendicular to an axis of the air outlet. Thus, a non-linear air flow may be formed, and a length of an air path may be extended to improve purification effect.
[0012] In some embodiments, the fan is arranged at the air outlet. Thus, the air may be forced through the coarse filter, the HEPA filter, and the active carbon filter in sequence.
[0013] In some embodiments, the fan is a centrifugal fan having an air intake aligned with the air outlet and an air outtake facing away from the air inlet. Thus, the purified air may be discharged away from an air inlet side where an operator usually stands, protecting the operator.
[0014] In some embodiments, the air purification assembly further includes a silencer coupled to the housing and arranged at the air outtake of the fan. Thus, noise of the fan can be reduced, to improve work environment of the operator.
[0015] In some embodiments, the air purification assembly further includes another fan coupled to the housing and arranged at the air inlet and configured to force the air into the first accommodating space. Thus, more air may be introduced into the coarse filter quickly to improve the purification effect.
[0016] In some embodiments, the housing defines a first accommodating space in direct communication with the air inlet and configured to receive the HEPA filter, a second accommodating space in direct communication with the first accommodating space and configured to receive the fan, and a third accommodating space in direct communication with the second accommodating space and the air outlet and configured to receive the active carbon filter. The fan is also received in the housing, and thus the air purification assembly may have a more compact structure.
[0017] In some embodiments, the air inlet and the air outlet are defined in two opposite walls of the housing, and the first accommodating space, the second accommodating space and the third accommodating space are arranged sequentially along an axis of the air outlet or an axis of the air inlet. The air inlet and the air outlet are defined in two opposite walls of the housing. Hence, an axis of the air inlet is parallel to an axis of the air outlet. Thus, a linear air flow may be formed, and a length of an air path may be shortened to improve purification speed.
[0018] In some embodiments, the axis of air inlet is aligned with the axis of the air outlet. Thus, the length of the air path may be further shortened to improve purification speed.
[0019] In some embodiments, the housing defines an opening in a wall parallel to an axis of the air outlet and an axis of the air inlet. Thus, components received in housing may be accessed to facilitate maintenance and replacement of these components.
[0020] In some embodiments, the HEPA filter includes a tie on a side exposed from the opening of the housing, and the active carbon filter includes a tie on a side exposed from the opening of the housing. Thus, the HEPA filter and the active carbon filter may be withdrawn from the housing easily for maintenance and replacement.
[0021] In some embodiments, the air purification assembly further includes a door pivotally coupled to the housing and configured to close or open the opening of the housing. Thus, the components in the housing may be protected by the door.
[0022] A laser printer according to embodiments of a second aspect of the present disclosure includes a laser generator, a printing area and an air purification assembly according to any one of the above-described embodiments. The laser generator is configured to laser-print an object. The printing area is located below the laser generator and configured to carry the object. The air purification assembly is located at a side of the printing area and the air inlet of the air purification faces the printing area.
[0023] In the laser printer according to embodiments of the present disclosure, by providing the HEPA filter and the active carbon filter, purification efficiency of harmful particles and gases generated during laser printing of the laser printer may be improved.
[0024] Additional aspects and advantages of embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure.BRIEF DESCRIPTION OF THE DRAWINGS
[0025] These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions made with reference to the drawings, in which:
[0026] FIG. 1 is a front view of a laser printer according to an embodiment of the present disclosure;
[0027] FIG. 2 is a front, top, left view of a laser printer according to an embodiment of the present disclosure;
[0028] FIG. 3 is a front, top, right view of a laser printer according to an embodiment of the present disclosure;
[0029] FIG. 4 is a left view of a laser printer according to an embodiment of the present disclosure;
[0030] FIG. 5 is a schematic view of a magazine according to an embodiment of the present disclosure; and
[0031] FIG. 6 is a schematic view of a collector according to an embodiment of the present disclosure.DETAILED DESCRIPTION
[0032] Reference will be made in detail to embodiments of the present disclosure. The embodiments described herein with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure. The same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions.
[0033] In the specification, unless specified or limited otherwise, relative terms such as “central” , “longitudinal” , “lateral” , “front” , “rear” , “right” , “left” , “inner” , “outer” , “lower” , “upper” , “horizontal” , “vertical” , “above” , “below” , “up” , “top” , “bottom” as well as derivative thereof (e.g., “horizontally” , “downwardly” , “upwardly” , etc. ) should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation.
[0034] In addition, terms such as “first” and “second” are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features. Thus, the feature defined with “first” and “second” may comprise one or more of this feature. In the description of the present invention, “a plurality of” means two or more than two, unless specified otherwise.
[0035] In the present invention, unless specified or limited otherwise, the terms “mounted, ” “connected, ” “coupled, ” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications or interactions of two elements, which can be understood by those skilled in the art according to specific situations.
[0036] In FIGS. 1 to 11, the orthogonal XYZ-axis is illustrated in order to facilitate the description and determine the directions. In which, the positive direction of the X-axis is the front direction and the negative direction of the X-axis is the rear direction; the positive direction of the Y-axis is the right direction and the negative direction of the Y-axis is the left direction; the positive direction of the Z-axis is the top direction and the negative direction of the Z-axis bottom direction.
[0037] With reference to FIGS. 1 to 11, an air purification assembly 100, 200 for a laser printer 1000 according to embodiments of the present disclosure will be described below.
[0038] As illustrated in FIGS. 1-3 and 6-7, an air purification assembly 100, 200 for a laser printer 1000 according to embodiments of the present disclosure includes a housing 140, 260, a HEPA filter 110, 220, an active carbon filter 120, 230 and a fan 130, 250. The housing 140, 260 includes an air inlet 160, 2611 and an air outlet 170, 2651. The HEPA filter 110, 220 is arranged in the housing 140, 260. The active carbon filter 120, 230 is arranged in the housing 140, 260 and downstream of the HEPA filter 110, 220. The HEPA filter 110, 220 and the active carbon filter 120, 230 are arranged downstream of the air inlet 160, 2611 and upstream of the air outlet 170, 2651. The fan 130, 250 is coupled to the housing 140, 260 and configured to force air through the HEPA filter 110, 220 and the active filter carbon to filter the air.
[0039] In the air purification assembly 100, 200 according to embodiments, by providing the HEPA filter 110, 220 and the active carbon filter 120, 230, purification efficiency of harmful particles and gases generated during laser printing of the laser printer 1000 may be improved.
[0040] In some embodiments, as illustrated in FIGS. 1-3 and 6-7each of the housing 140, 260, the HEPA filter 110, 220 and the active carbon filter 120, 230 has a cuboid shape. By setting the housing 140, 260, the HEPA filter 110, 220 and the active carbon filter 120, 230 to have a cuboid shape, the purification assembly may have a compact structure and small footprint.
[0041] In some embodiments, as illustrated in FIGS. 6 and 7, the air purification assembly 200 further includes a coarse filter 210 arranged in the housing 260 and downstream of the air inlet 2611 and upstream of the HEPA filter 220, and the fan 250 is configured to force the air through the coarse filter 210, the HEPA filter 220 and the active carbon filter 230. The coarse filter 210 may prevent large particles from moving into the neighboring HEPA filter 220, and the HEPA filter 220 and the active carbon filter 230 may absorb the most part of the micro particles and odor. The provision of the coarse filter 210 may further improve the purification of the air purification assembly 200.
[0042] In some embodiments, as illustrated in FIGS. 6 and 7, the coarse filter 210 has a cuboid shape. Thus the air purification assembly 200 may have a compact structure.
[0043] For example, the coarse filter 210 may include coarse filtering cotton, dust filtering bag, dust filtering coiled pipe, and so on.
[0044] In some embodiments, as illustrated in FIGS. 6 and 7, the housing 260 defines a first accommodating space 2691 in direct communication with the air inlet 2611 and configured to receive the coarse filter 210, a second accommodating space 2693 in direct communication with the first accommodating space 2691 and configured to receive the HEPA filter 220, and a third accommodating space 2695 in direct communication with the second accommodating space 2693 and the air outlet 2651 and configured to receive the active carbon filter 230. Thus, the housing 260 may receive the coarse filter 210, the HEPA filter 220 and the active carbon filter 230 in place, and the air may be purified through the coarse filter 210, the HEPA filter 220 and the active carbon filter 230 in sequence.
[0045] In some embodiments, as illustrated in FIGS. 8 and 9, the air inlet 2611 and the air outlet 2651 are defined in two adjacent walls of the housing 260, and the first accommodating space 2691, the second accommodating space 2693 and the third accommodating space 2695 are arranged sequentially along an axis of the air outlet 2651. The housing 260 has a cuboid shape, and the air inlet 2611 and the air outlet 2651 are defined in two adjacent walls of the housing 260. Hence, an axis of the air inlet 2611 is perpendicular to an axis of the air outlet 2651. Thus, a non-linear air flow may be formed, and a length of an air path may be extended to improve purification effect.
[0046] In some embodiments, as illustrated in FIGS. 8 and 9, the fan 250 is arranged at the air outlet 2651. Thus, the air may be forced through the coarse filter 210, the HEPA filter 220, and the active carbon filter 230 in sequence.
[0047] In some embodiments, as illustrated in FIGS. 8 and 9, the fan 250 is a centrifugal fan having an air intake 251 aligned with the air outlet 2651 and an air outtake 252 facing away from the air inlet 2611. Thus, the purified air may be discharged away from an air inlet side where an operator usually stands, protecting the operator.
[0048] In some embodiments, as illustrated in FIGS. 8 and 9, the air purification assembly 200 further includes a silencer 290 coupled to the housing 260 and arranged at the air outtake 252 of the fan 250. Thus, noise of the fan 250 can be reduced, to improve work environment of the operator.
[0049] In some embodiments, as illustrated in FIGS. 8 and 9, the air purification assembly 200 further includes another fan 240 coupled to the housing 260 and arranged at the air inlet 2611 and configured to force the air into the first accommodating space 2691. Thus, more air may be introduced into the coarse filter 210 quickly to improve the purification effect.
[0050] In some embodiments, as illustrated in FIGS. 3 to 5, the housing 140 defines a first accommodating space in direct communication with the air inlet 160 and configured to receive the HEPA filter 110, a second accommodating space in direct communication with the first accommodating space and configured to receive the fan 130, and a third accommodating space in direct communication with the second accommodating space and the air outlet 170 and configured to receive the active carbon filter 120. The fan 130 is also received in the housing 140, and thus the air purification assembly 100 may have a more compact structure.
[0051] In some embodiments, as illustrated in FIGS. 3 to 5, the air inlet 160 and the air outlet 170 are defined in two opposite walls of the housing 140, and the first accommodating space, the second accommodating space and the third accommodating space are arranged sequentially along an axis of the air outlet 170 or an axis of the air inlet 160. The housing 140 has a cuboid shape, and the air inlet 160 and the air outlet 170 are defined in two opposite walls of the housing 140. Hence, an axis of the air inlet 160 is parallel to an axis of the air outlet 170. Thus, a linear air flow may be formed, and a length of an air path may be shortened to improve purification speed.
[0052] In some embodiments, as illustrated in FIGS. 3 to 5, the axis of air inlet 160 is aligned with the axis of the air outlet 170. Thus, the length of the air path may be further shortened to improve purification speed.
[0053] In some embodiments, as illustrated in FIGS. 3-5 and 8-9, the housing 140, 260 defines an opening in a wall parallel to an axis of the air outlet 170, 2651 and an axis of the air inlet 160, 2611. Thus, components received in housing 140, 260 may be accessed to facilitate maintenance and replacement of these components.
[0054] In some embodiments, as illustrated in FIGS. 3-5 and 8-9, the HEPA filter 110, 220 includes a tie 119, 229 on a side exposed from the opening of the housing 140, 260, and the active carbon filter 120, 230 includes a tie 129, 239 on a side exposed from the opening of the housing 140, 260. Thus, the HEPA filter 110, 220 and the active carbon filter 120, 230 may be withdrawn from the housing 140, 260 easily for maintenance and replacement.
[0055] In some embodiments, as illustrated in FIGS. 3-5 and 8-9, the air purification assembly 100, 200 further includes a door 150, 270 pivotally coupled to the housing 140, 260 and configured to close or open the opening of the housing 140, 260. Thus, the components in the housing 140, 260 may be protected by the door 150, 270.
[0056] As illustrated in FIGS. 10 and 11, a laser printer 1000 according to embodiments of the present disclosure includes a laser generator 1100, a printing area 1200 and an air purification assembly 100, 200 according to any one of the above-described embodiments. The laser generator 1100 is configured to laser-print an object. The printing area 1200 is located below the laser generator 1100 and configured to carry the object. The air purification assembly 100, 200 is located at a side of the printing area 1200 and the air inlet 160, 2611 of the air purification assembly 100, 200 faces the printing area 1200.
[0057] In the laser printer 1000 according to embodiments of the present disclosure, by providing the HEPA filter 110, 220 and the active carbon filter 120, 230, purification efficiency of harmful particles and gases generated during laser printing of the laser printer 1000 may be improved; furthermore, by setting the housing, the HEPA filter 110, 220 and the active carbon filter 120, 230 to have a cuboid shape, the purification assembly may have a compact structure and small footprint, and thus the laser printer 1000 may have a compact structure and small footprint.
[0058] In some embodiments, as illustrated in FIGS. 10 and 11, the laser printer 1000 further includes a laser cover 1300, and the laser cover 1300 encloses the space between the printing area 1200 and a laser head of the laser generator 1100. The laser cover 1300 may prevent leakage of the laser during laser printing, to protect eyes of the operator. Furthermore, the laser cover 1300 inhibits escaping of harmful particles and gases generated during laser printing.
[0059] In some embodiments, as illustrated in FIGS. 10 and 11, the laser cover 1300 defines an aperture in communication with the air inlet 160, 2611 of the housing 140, 260. Thus, the air purification assembly 100, 200 may absorb the harmful particles and gases generated during laser printing more efficiently.
[0060] An air purification assembly 100 for a laser printer 1000 according to an embodiment of the present disclosure will be described in detail below with FIGS. 1 to 5.
[0061] As illustrated in FIGS. 1 to 5, the air purification assembly 100 includes a HEPA filter 110, 220, an active carbon filter 120, 230, a fan 130, a housing 140 and a door 150, 270.
[0062] As illustrated in FIG. 3, the housing 140 has a substantially cubic shape and includes a first frame 141 and a second frame 145.
[0063] The door 150, the first frame 141 and the second frame 145 are ranged sequentially from left to right. Each of the first frame 141 and the second frame 145 has a substantially cuboid shape with a height in a top-bottom direction and a length in a front-rear direction being equal and a width in the left-right direction being less than the height in the top-bottom direction or the length in the front-rear direction.
[0064] As illustrated in FIG. 4, the first frame 141 includes a front wall 1411, a rear wall 1412, a left wall 1413, a right wall 1414, a top wall 1415 and a bottom wall 1416. The first frame 141 defines a first accommodating groove 1419 extending through the left wall 1413 and the right wall 1414 of the first frame 141 in the left-right direction for accommodating the HEPA filter 110; a second accommodating groove 1420 open towards the second frame 145 for accommodating the fan 130; and a third accommodating groove 1421 extending through the left wall 1413 and the right wall 1414 of the first frame 141 in the left-right direction for accommodating the active carbon filter 120, 230. The first accommodating groove 1419, the second accommodating groove 1420 and the third accommodating groove 1421 are arranged sequentially from front to rear.
[0065] A first notch 1422 is defined in the front wall 1411 of the first frame 141, and the first notch 1422 has a semi-circular shape which opens towards the second frame 145.
[0066] A second notch 1423 is defined in the rear wall 1412 of the first frame 141, and the second notch 1423 has a semi-circular shape which opens towards the second frame 145.
[0067] The first frame 141 includes a first partition plate 1417 and a second partition plate 1418. The first partition plate 1417 separates the first accommodating groove 1419 from the second accommodating groove 1420, and the second partition plate 1418 separates the second accommodating groove 1420 from the third accommodating groove 1421.
[0068] A third notch 1424 is defined in the first partition plate 1417, and the third notch 1424 has a semi-circular shape which opens towards the second frame 145.
[0069] A fourth notch 1425 is defined in the second partition plate 1418, and the fourth notch 1425 has a semi-circular shape which opens towards the second frame 145.
[0070] A diameter of the second notch 1423 is equal to a diameter of the fourth notch 1425, a diameter of the third notch 1424 is less than the diameter of the third notch 1424 or the fourth notch 1425, and a diameter of the first notch 1422 is less than diameters of the second, third and fourth notches 1423, 1424, 1425.
[0071] The first partition plate 1417 defines two screw holes 1426 adjacent to an edge of the third notch 1424, and the second partition plate 1418 defines two circular cuts 1427 at the edge of the fourth notch 1425, and the rear wall 1412 of the first frame 141 defines two circular cuts 1427 at the edge of the second notch 1423. Axes of the screw holes 1426 in the first partition plate 1417, the circular cuts 1427 in the second partition plate 1418, and the circular cuts 1427 in the rear wall 1412 of the first frame 141 are aligned to one another.
[0072] As illustrated in FIG. 5, the second frame 145 includes a front wall 1451, a rear wall 1452, a left wall 1453, a right wall 1454, a top wall 1455 and a bottom wall 1456. The second frame 145 defines a fourth accommodating groove 1459 open towards the first frame 141 for accommodating the HEPA filter 110, 220; a fifth accommodating groove 1460 open towards the first frame 141 for accommodating the fan 130; and a sixth accommodating groove 1461 open towards the first frame 141 for accommodating the active carbon filter 120, 230. The fourth accommodating groove 1459, the fifth accommodating groove 1460 and the sixth accommodating groove 1461 are arranged sequentially from front to rear.
[0073] A fifth notch 1462 is defined in the front wall 1451 of the second frame 145, and the fifth notch 1462 has a semi-circular shape which opens towards the first frame 141.
[0074] A sixth notch 1463 is defined in the rear wall 1452 of the second frame 145, and the sixth notch 1463 has a semi-circular shape which opens towards the first frame 141.
[0075] The second frame 145 includes a third partition plate 1457 and a fourth partition plate 1458. The third partition plate 1457 separates the fourth accommodating groove 1459 from the fifth accommodating groove 1460, and the fourth partition plate 1458 separates the fifth accommodating groove 1460 from the sixth accommodating groove 1461.
[0076] A seventh notch 1464 is defined in the third partition plate 1457, and the seventh notch 1464 has a semi-circular shape which opens towards the first frame 141.
[0077] An eighth notch 1465 is defined in the fourth partition plate 1458, and the eighth notch 1465 has a semi-circular shape which opens towards the first frame 141.
[0078] A diameter of the sixth notch 1463 is equal to a diameter of the eighth notch 1465, a diameter of the seventh notch 1464 is less than the diameter of the sixth notch 1463 or the eighth notch 1465, and a diameter of the fifth notch 1462 is less than diameters of the sixth, seventh and eighth notches 1463, 1464, 1465.
[0079] The third partition plate 1457 defines two screw holes 1466 adjacent to an edge of the seventh notch 1464, and the fourth partition plate 1458 defines two circular cuts 1467 at the edge of the eighth notch 1465, and the rear wall 1452 of the second frame 145 defines two circular cuts 1467 at the edge of the fifth notch 1462. Axes of the screw holes 1466 in the third partition plate 1457, the circular cuts 1467 in the fourth partition plate 1458, and the circular cuts 1467 in the rear wall 1452 of the second frame 145 are aligned to one another.
[0080] The first frame 141 further includes two indented portions 1428 defined in the top wall 1415 and the bottom wall 1416 of the first frame 141, respectively, and the second frame 145 further includes two protrusions 1468 extending from the top wall 1455 and the bottom wall 1456 of the second frame 145, respectively. The two protrusions 1468 of the second frame 145 are respectively fitted in the two indented portions 1428 of the first frame 141, to limit the relative position of the first frame 141 and the second frame 145.
[0081] The first frame 141 includes four screw holes 1429 in the right wall 1414 of the first frame 141, two of them are located adjacent to the top wall 1415 of the first frame 141, and the other two are located adjacent to the bottom wall 1416 of the first frame 141.
[0082] The second frame 145 includes four via holes 1469 in the left wall 1453 of the second frame 145, two of them are located adjacent to the top wall 1455 of the second frame 145, and the other two are located adjacent to the bottom wall 1456 of the second frame 145. The second frame 145 also includes two slots 1470 in the top wall 1455 of the second frame 145 and two slots 1470 in the bottom wall 1456 of the second frame 145.
[0083] Axes of the screw holes 1429 in the right wall 1414 of the first frame 141, the via holes 1469 in the left wall 1453 of the second frame 145, and the slots 1470 in the top and bottom walls 1455, 1456 of the second frame 145 are aligned in the left-right direction. Hence, the first frame 141 and the second frame 145 may be assembled by passing screws through the slots 1470 and the via holes 1469 and screwing them into the screw holes 1429.
[0084] When the first frame 141 and the second frame 145 are assembled, the first notch 1422 and the fifth notch 1462 form an air inlet 160, the second notch 1423 and the sixth notch 1463 form an air outlet 170, the third notch 1424 and the seventh notch 1464 forms a first passage hole, and the fourth notch 1425 and the eighth notch 1465 are mated to form a second passage hole. The first accommodating groove 1419 and the fourth accommodating groove 1459 are mated to form a first accommodating space for the HEPA filter 110, the second accommodating groove 1420 and the fifth accommodating groove 1460 are mated to form a second accommodating space for the fan 130, and the third accommodating groove 1421 and the sixth accommodating groove 1461 are mated to form a third accommodating space for the active carbon filter 120.
[0085] The HEPA filter 110 has a substantially cuboid shape with a height in the top-bottom direction and a length in the left-right direction being equal and a width in the front-rear direction being less than the height in the top-bottom direction or the length in the left-right direction.
[0086] As illustrated in FIGS. 4 and 5, the HEPA filter 110 includes a front wall 111, a rear wall 112, a left wall 113, a right wall 114, a top wall 115 and a bottom wall 116. The HEPA filter 110 includes a square inlet port 117 in the front wall 111 and a square outlet port 118 in the rear wall 112. The HEPA filter 110 further includes a tie 119 at the left wall 113 of the HEPA filter 110 to facilitate replacement of the HEPA filter 110.
[0087] As illustrated in FIG. 4 the fan 130 has a substantially cylindrical body 131 with four mounting posts 132 distributed around a periphery of the cylindrical body 131 and protruded radially from the periphery of the cylindrical body 131. A diameter of the cylindrical body 131 is equal to or less than the diameter of the air outlet 170 or the second passage hole, and greater than the diameter of the first passage hole. Axes of the mounting posts 132, the circular cuts 1427, 1467 in the second and fourth partition plates 1418, 1458 and the rear walls 1412, 1452 of the first frame 141 and the second frame 145, and the screw holes 1426, 1466 in the first and third partition plates 1417, 1457 are aligned. Thus, the fan 130 may be inserted into housing 140 through the air outlet 170, 2651 and the second passage hole, and installed on the first and third partition plates 1417, 1457.
[0088] The active carbon filter 120 has a substantially cuboid shape with a height in the top-bottom direction and a length in the left-right direction being equal and a width in the front-rear direction being less than the height in the top-bottom direction or the length in the left-right direction. The height in the top-bottom direction or the length in the left-right direction of the active carbon filter 120 is equal to the height in the top-bottom direction or the length in the left-right direction of the HEPA filter 110, and the width in the front-rear direction of the active carbon filter 120 is less than the width in the front-rear direction of the HEPA filter 110.
[0089] As illustrated in FIGS. 4 and 5, the active carbon filter 120 includes a front wall 121, a rear wall 122, a left wall 123, a right wall 124, a top wall 125 and a bottom wall 126. The active carbon filter 120 includes a square inlet port 127 in the front wall 121 and a square outlet port 128 in the rear wall 122. The active carbon filter 120 further includes a tie 129 at the left wall 123 of the active carbon filter 120 to facilitate replacement of the active carbon filter 120.
[0090] The HEPA filter 110 is fitted in the first accommodating space, the fan 130 is fitted in the second accommodating space, and the active carbon filter 120 is fitted in the third accommodating space. The first accommodating space is in communication with the second accommodating space through the first passage hole, and the second accommodating space is in communication with the third accommodating space through the second passage hole. The first accommodating space is in communication with the ambient through the air inlet 160, and the third accommodation space is in communication with the ambient through the air outlet 170.
[0091] The tie 119 on the HEPA filter 110 is exposed from the first accommodating space through an opening of the first accommodating space in the left wall 1413 of the first frame 141, and the tie 129 on the active carbon filter 120 is exposed from the third accommodating space through an opening of the third accommodating space in the left wall 1413 of the first frame 141.
[0092] The door 150 has a substantially square plate shape, and is pivotally coupled to the first frame 141. Specifically, a top portion of the door 150 is coupled to a top wall 1415 of the first frame 141 via a hinge 180. The first frame 141 includes a void 1433 defined by two ribs 1432 extending in the front-rear direction and formed at the bottom edge of the left wall 1413 of the first frame 141. The door 150 extends a tab 151 from a bottom edge of the door 150, and the tab 151 is fitted in the void 1433 to limit relative position of the door 150 and the first frame 141.
[0093] Furthermore, the first frame 141 includes two recessed portions 1430 in the left wall 1413 of the first frame 141, and two magnets 190 are fitted in the two recessed portions 1430, respectively. The door 150 is made of ferrous materials, and the door 150 is attached on the left wall 1413 of the first frame 141 by the two magnets 190 when the door 150 is in a closed state.
[0094] When in operation, the fan 130 generate a forced air flow from the air inlet 160 to the air outlet 170 through the HEPA filter 110, the first passage hole, the fan 130, the second passage hole and the active carbon filter 120.
[0095] An air purification assembly 200 for a laser printer 1000 according to another embodiment of the present disclosure will be described in detail below with FIGS. 6 to 9.
[0096] As illustrated in FIGS. 6 to 9, the air purification assembly 200 includes a coarse filter 210, a HEPA filter 220, an active carbon filter 230, a first fan 240, a second fan 250, a housing 260 and a door 270.
[0097] As illustrated in FIGS. 6 and 7, the housing 260 has a substantially cuboid shape.
[0098] The door 270 and the housing 260 are ranged sequentially from left to right. The housing 260 has a substantially cuboid shape with a width in a left-right direction and a length in a front-rear direction being equal and a height in the top-bottom direction being greater than the width in the left-right direction or the length in the front-rear direction.
[0099] As illustrated in FIG. 8, the housing 260 includes a front wall 261, a rear wall 262, a left wall 263, a right wall 264, a top wall 265 and a bottom wall 266. The housing 260 defines a first accommodating space 2691 with an opening in the left wall 263 of the housing 260 for accommodating the coarse filter 210; a second accommodating space 2693 with an opening in the left wall 263 of the housing 260 for accommodating the HEPA filter 220; and a third accommodating space 2695 with an opening in the left wall 263 of the housing 260 for accommodating the active carbon filter 230. The first accommodating space 2691, the second accommodating space 2693 and the third accommodating space 2695 are arranged sequentially from bottom to top.
[0100] An air inlet 2611 is defined in the front wall 261 of the housing 260, and the air inlet 2611 has a circular shape, and the air inlet 2611 is in direct communication with the first accommodating space 2691.
[0101] The housing 260 includes a first partition plate 267 and a second partition plate 268. The first partition plate 267 separates the first accommodating space 2691 from the second accommodating space 2693, and the second partition plate 268 separates the second accommodating space 2693 from the third accommodating space 2695.
[0102] A first passage hole 2671 is defined in the first partition plate 267, and the first passage hole 2671 has a rectangular shape. The first accommodating space 2691 is in direct communication with the second accommodating space 2693 through the first passage hole 2671.
[0103] A second passage hole 2681 is defined in the second partition plate 268, and the second passage hole 2681 has a rectangular shape. The second accommodating space 2693 is in direct communication with the third accommodating space 2695 through the second passage hole 2681.
[0104] The coarse filter 210 has a substantially cuboid shape with a width in the front-rear direction and a length in the left-right direction being equal and a height in the top-bottom direction being less than the width in the front-rear direction or the length in the left-right direction.
[0105] As illustrated in FIGS. 8 and 9, the coarse filter 210 includes a front wall 211, a rear wall 212, a left wall 213, a right wall 214, a top wall 215 and a bottom wall 216. The coarse filter 210 includes an inlet port 217 in the front wall 211 of the coarse filter 210 aligned with the air inlet 2611, and an outlet port 218 in the top wall 215 of the coarse filter 210. For another example, the top wall 215 of the coarse filter 210 may be made of air permeable materials.
[0106] The coarse filter 210 further includes a flange 2171 extending radially from the inlet port 217. The housing 260 includes guide slots 2661 in the bottom wall 266 and the first partition plate 267. The flange 2171 is fitted in the guide slots 2661 and slidable along the guide slots 2661, and thus the coarse filter 210 is slidably coupled to the housing 260. Additionally, a rectangular opening 2172 is defined in the flange 2171 of the coarse filter 210 to facilitate handling of the coarse filter 210.
[0107] The HEPA filter 220 has a substantially cuboid shape with a width in the front-rear direction and a length in the left-right direction being equal and a height in the top-bottom direction being less than the width in the front-rear direction or the length in the left-right direction.
[0108] As illustrated in FIGS. 8 and 9, the HEPA filter 220 includes a front wall 221, a rear wall 222, a left wall 223, a right wall 224, a top wall 225 and a bottom wall 226. The HEPA filter 220 includes a square inlet port 227 in the bottom wall 226 and a square outlet port 228 in the top wall 225. The HEPA filter 220 further includes a tie 229 at the left wall 223 of the HEPA filter 220 to facilitate replacement of the HEPA filter 220.
[0109] The active carbon filter 230 has a substantially cuboid shape with a width in the front-rear direction and a length in the left-right direction being equal and a height in the top-bottom direction being less than the width in the front-rear direction or the length in the left-right direction. The width in the front-rear direction or the length in the left-right direction of the active carbon filter 230 is equal to the width in the front-rear direction or the length in the left-right direction of the HEPA filter 220, and the height in the top-bottom direction of the active carbon filter 230 is less than the height in the top-bottom direction of the HEPA filter 220.
[0110] As illustrated in FIGS. 8 and 9, the active carbon filter 230 includes a front wall 231, a rear wall 232, a left wall 233, a right wall 234, a top wall 235 and a bottom wall 236. The active carbon filter 230 includes a square inlet port 237 in the bottom wall 236 and a square outlet port 238 in the top wall 235. The active carbon filter 230 further includes a tie 239 at the left wall 233 of the active carbon filter 230 to facilitate replacement of the active carbon filter 230.
[0111] The coarse filter 210 is fitted in the first accommodating space 2691, the HEPA filter 220 is fitted in the second accommodating space 2693, and the active carbon filter 230 is fitted in the third accommodating space 2695. The first accommodating space 2691 is in communication with the second accommodating space 2693 through the first passage hole 2671, and the second accommodating space 2693 is in communication with the third accommodating space 2695 through the second passage hole 2681. The first accommodating space 2691 is in communication with the ambient through the air inlet 2611, and the third accommodation space is in communication with the ambient through the air outlet 2651.
[0112] The tie 229 on the HEPA filter 220 is exposed from the second accommodating space 2693 through an opening of the second accommodating space 2693 in the left wall 263 of the housing 260, and the tie 239 on the active carbon filter 230 is exposed from the third accommodating space 2695 through an opening of the third accommodating space 2695 in the left wall 263 of the housing 260.
[0113] The first fan 240 is an axial fan. The first fan 240 is mounted at the air inlet 2611 with axes of the first fan 240 and the air inlet 2611 being aligned.
[0114] The second fan 250 is a centrifugal fan. The second fan 250 is mounted at the air outlet 2651 with axes of an air intake 251 of the second fan 250 and the air outlet 2651 being aligned. An air outtake 252 of the second fan 250 is oriented towards the rear. The air purification assembly 200 also includes a silencer 290 mounted at the air outtake 252 of the second fan 250 for noise reduction.
[0115] The door 270 has a substantially rectangular plate shape, and is pivotally coupled to the housing 260. Specifically, a top portion of the door 270 is coupled to a top wall 265 of the housing 260 via a hinge 280. The housing 260 includes a screw hole 2699 defined in the left wall 263 adjacent to the bottom wall 266 of the housing 260. The door 270 extends a tab 271 from a bottom edge of the door 270 serving as a handle and defines a via hole 272. A screw 299 may passes through the via hole 272 in the door 270 and screwed into the screw hole 2699 in the housing 260 to fasten the door 270 with the housing 260.
[0116] When in operation, the first fan 240 forces air into the coarse filter 210 through the air inlet 2611 in the housing 260 and the inlet port 217 in the coarse filter 210; and the second fan 250 draws air out of the housing 260 through the outlet port 218 in the coarse filter 210, the first passage hole 2671, the inlet port 227 of the HEPA filter 220, the outlet port 228 of the HEPA filter 220, the second passage hole 2681, the inlet port 237 of the active carbon filter 230, the outlet port 238 of the active carbon filter 230 and the air outlet 2651 of the housing 260, and discharges the air to the rear through the air outtake 252 of the second fan 250 and the silencer 290.
[0117] A laser printer 1000 according to embodiments of the present disclosure will be described below with reference to FIGS. 10 and 11.
[0118] The laser printer 1000 includes laser generator 1100, a printing area 1200, a laser cover 1300, and an air purification assembly 100 or 200. The laser generator 1100 is configured to laser-print an object. The printing area 1200 is located below the laser generator 1100 and configured to carry the object. The air purification assembly 100 or 200 is located at a side of the printing area 1200 and the air inlet 160 or 2611 of the air purification assembly 100 or 200 faces the printing area 1200.
[0119] The laser cover 1300 encloses a space between the printing area 1200 and a laser head of the laser generator 1100. The laser cover 1300 may prevent leakage of the laser during laser printing, to protect eyes of the operator. Furthermore, the laser cover 1300 inhibits escaping of harmful particles and gases generated during laser printing.
[0120] The laser cover 1300 defines an aperture in communication with the air inlet 160 or 2611 of the housing 140 or 260. Thus, the air purification assembly 100 or 200 may absorb the harmful particles and gases generated during laser printing more efficiently.
[0121] Reference throughout this specification to “an embodiment, ” “some embodiments, ” “one embodiment” , “another example, ” “an example, ” “a specific example, ” or “some examples, ” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the phrases such as “in some embodiments, ” “in one embodiment” , “in an embodiment” , “in another example, ” “in an example, ” “in a specific example, ” or “in some examples, ” in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0122] Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that the above embodiments cannot be construed to limit the present disclosure, and changes, alternatives, and modifications can be made in the embodiments without departing from spirit, principles and scope of the present disclosure.
[0123] Reference numerals: 1000 laser printer 1100 laser generator 1200 printing area 1300 laser cover 100 air purification assembly 110 HEPA filter 111 front wall 112 rear wall 113 left wall 114 right wall 115 top wall 116 bottom wall 117 inlet port 118 outlet port 119 tie 120 active carbon filter 211 front wall 212 rear wall 213 left wall 214 right wall 215 top wall 216 bottom wall 217 inlet port 218 outlet port 219 tie 130 fan 131 cylindrical body 132 mounting post 140 housing 141 first frame 1411 front wall 1412 rear wall 1413 left wall 1414 right wall 1415 top wall 1416 bottom wall 1417 first partition plate 1418 second partition plate 1419 first accommodating groove 1420 second accommodating groove 1421 third accommodating groove 1422 first notch 1423 second notch 1424 third notch 1425 fourth notch 1426 screw hole 1427 circular cut 1428 indented portion 1429 screw hole 1430 recessed portion 1432 rib 1433 void 145 second frame 1451 front wall 1452 rear wall 1453 left wall 1454 right wall 1455 top wall 1456 bottom wall 1457 third partition plate 1458 fourth partition plate 1459 fourth accommodating groove 1460 fifth accommodating groove 1461 sixth accommodating groove 1462 fifth notch 1463 sixth notch 1464 seventh notch 1465 eighth notch 1466 screw hole 1467 circular cut 1468 protrusion 1469 via hole 1470 slot 150 door 151 tab 160 air inlet 170 air outlet 180 hinge 190 magnet 200 air purification assembly 210 coarse filter 211 front wall 212 rear wall 213 left wall 214 right wall 215 top wall 216 bottom wall 217 inlet port 2171 flange 2172 rectangular opening 218 outlet port 220 HEPA filter 221 front wall 222 rear wall 223 left wall 224 right wall 225 top wall 226 bottom wall 227 inlet port 228 outlet port 229 tie 230 active carbon filter 231 front wall 232 rear wall 233 left wall 234 right wall 235 top wall 236 bottom wall 237 inlet port 238 outlet port 239 tie 240 first fan 250 second fan 251 air intake 252 air outtake 260 housing 261 front wall 2611 air inlet 262 rear wall 263 left wall 264 right wall 265 top wall 2651 air outlet 266 bottom wall 2661 guide slot 267 first partition plate 2671 first passage hole 268 second partition plate 2681 second passage hole 2691 first accommodating space 2693 second accommodating space 2695 third accommodating space 2699 screw hole 270 door 271 tab 272 via hole 280 hinge 290 silencer 299 screw
Claims
1.An air purification assembly for a laser printer, comprising:a housing comprising an air inlet and an air outlet,a HEPA filter arranged in the housing,an active carbon filter arranged in the housing and downstream of the HEPA filter, the HEPA filter and the active carbon filter being arranged downstream of the air inlet and upstream of the air outlet; anda fan coupled to the housing and configured to force air through the HEPA filter and the active filter carbon to filter the air.2.The air purification assembly according to claim 1, further comprising:a coarse filter arranged in the housing and downstream of the air inlet and upstream of the HEPA filter, and the fan is configured to force the air through the coarse filter, the HEPA filter and the active carbon filter.3.The air purification assembly according to claim 2, wherein the housing defines a first accommodating space in direct communication with the air inlet and configured to receive the coarse filter, a second accommodating space in direct communication with the first accommodating space and configured to receive the HEPA filter, and a third accommodating space in direct communication with the second accommodating space and the air outlet and configured to receive the active carbon filter.4.The air purification assembly according to claim 3, wherein the air inlet and the air outlet are defined in two adjacent walls of the housing, and the first accommodating space, the second accommodating space and the third accommodating space are arranged sequentially along an axis of the air outlet.5.The air purification assembly according to claim 4, wherein the fan is arranged at the air outlet.6.The air purification assembly according to claim 5, wherein the fan is a centrifugal fan having an air intake aligned with the air outlet and an air outtake facing away from the air inlet.7.The air purification assembly according to claim 6, further comprising a silencer coupled to the housing and arranged at the outtake of the fan.8.The air purification assembly according to claims 4 to 7, further comprising another fan coupled to the housing and arranged at the air inlet and configured to force the air into the first accommodating space.9.The air purification assembly according to claim 1, wherein the housing defines a first accommodating space in direct communication with the air inlet and configured to receive the HEPA filter, a second accommodating space in direct communication with the first accommodating space and configured to receive the fan, and a third accommodating space in direct communication with the second accommodating space and the air outlet and configured to receive the active carbon filter.10.The air purification assembly according to claim 9, wherein the air inlet and the air outlet are defined in two opposite walls of the housing, and the first accommodating space, the second accommodating space and the third accommodating space are arranged sequentially along an axis of the air outlet or an axis of the air inlet.11.The air purification assembly according to claim 10, wherein the axis of air inlet is aligned with the axis of the air outlet.12.The air purification assembly according to claims 1 to 11, wherein the housing defines an opening in a wall parallel to an axis of the air outlet and an axis of the air inlet.13.The air purification assembly according to claim 12, wherein the HEPA filter comprises a tie on a side exposed from the opening of the housing, and the active carbon filter comprises a tie on a side exposed from the opening of the housing.14.The air purification assembly according to claim 12 or 13, further comprising a door pivotally coupled to the housing and configured to close or open the opening of the housing.15.A laser printer, comprising:a laser generator configured to laser-print an object;a printing area located below the laser generator and configured to carry the object; andan air purification assembly according to any one of claims 1 to 14, wherein the air purification assembly is located at a side of the printing area and the air inlet of the air purification faces the printing area.