LSU noise reduction and heat dissipation method and device

Abstract

The present invention relates to the technical field of LSU noise reduction, and discloses an LSU noise reduction and heat dissipation method for noise reduction of the LSU module of a laser printer, comprising the following steps: placing the LSU module in a vacuum state by evacuating the outside of the LSU module; forming an internal circulation airflow between the LSU module and a noise reduction box; and dissipating the heat carried in the internal circulation airflow to the outside of the noise reduction box by heat exchange. The present invention also provides an LSU noise reduction and heat dissipation device, which is suitable for the LSU noise reduction and heat dissipation method, comprising a noise reduction box, an axial flow fan fixedly provided on the top of the LSU module located on the air inlet slot for forming an internal circulation airflow inside the noise reduction box; and also comprising a heat conduction component. The present invention can effectively block the propagation of LSU module noise and eliminate noise pollution of the LSU module by setting a vacuum space around the LSU module. At the same time, it also ensures good heat dissipation inside the LSU module, which is beneficial to improving the working performance of the LSU module.

Description

Technical Field

[0001] The present invention belongs to the technical field of LSU noise reduction, and in particular relates to an LSU noise reduction and heat dissipation method and device. Background Art

[0002] LSU (Laser Scanning Unit) is a laser scanning unit, which is widely used in office equipment such as laser printers. LSU is used to expose the photosensitive drum that has been charged with a uniform charge, so that an "electrostatic latent image" is formed on the surface of the photosensitive drum.

[0003] As one of the core components of a laser printer, the LSU module requires a built-in scanning motor to rotate at high speed during operation, which causes serious noise pollution. However, the existing laser scanning unit lacks noise suppression, which causes trouble to surrounding staff. At the same time, the noise will also cause low-frequency resonance, which will cause certain interference to the laser generator in the LSU module and reduce the accuracy of the laser beam. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing LSU module in the prior art, such as noise pollution and lack of noise suppression, and to propose an LSU noise reduction and heat dissipation method and device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for reducing noise and dissipating heat in an LSU module of a laser printer is designed, including the following steps:

[0007] Step 1: A detachable noise reduction box is provided on the outside of the LSU module, and the LSU module is placed in a vacuum state by vacuuming;

[0008] Step 2: Use the internal circulation fan to form an internal circulation airflow between the LSU module and the noise reduction box;

[0009] Step 3: A heat conduction component with a metal structure is provided on the inner circulation air flow channel to conduct the heat carried by the inner circulation air flow to the outside of the noise reduction box body through heat exchange.

[0010] Furthermore, in the step, the interior of the noise reduction box is a dust-free and enclosed space.

[0011] Furthermore, in the step, the internal circulating airflow is in an "∞" shape and passes through the interior of the LSU module.

[0012] Furthermore, in the step, the heat conducting components are distributed in a tooth shape on both the inner and outer sides of the noise reduction box body.

[0013] The present invention also provides an LSU noise reduction and heat dissipation device, which is applicable to the above-mentioned LSU noise reduction and heat dissipation method, and includes a noise reduction box body, which is detachably arranged on the outside of the LSU module, and a plane lens adapted to the light beam is provided at the light beam output end of the noise reduction box body corresponding to the LSU module;

[0014] The noise reduction box body is provided with a one-way valve interface for vacuuming;

[0015] A fixing plate is provided at the bottom of the noise reduction box body;

[0016] The top of the LSU module housing is provided with an air inlet slot, and both sides of the housing are symmetrically provided with air outlet slots, and the air inlet slots and the air outlet slots are connected to the interior of the LSU module;

[0017] The top of the LSU module is located on the air inlet slot and is fixed with an axial flow fan for forming an internal circulating airflow inside the noise reduction box;

[0018] It also includes a heat conduction component, which includes a heat conduction block, an inner heat conduction bar and an outer heat conduction bar. The heat conduction block is fixed on one side of the noise reduction box in an embedded manner, and the inner heat conduction bar and the outer heat conduction bar are respectively arranged on the inner and outer sides of the noise reduction box. The inner heat conduction bar is located on the inner circulation airflow channel above the axial fan.

[0019] Furthermore, a folded edge protruding outward is provided on the circumference of the bottom edge of the noise reduction box body, and a sealing ring is provided between the folded edge and the fixing plate.

[0020] Furthermore, a lip protruding upward is provided on one side of the sealing ring located inside the noise reduction box body, and the lip is in contact with the inner wall of the noise reduction box body.

[0021] Furthermore, a double-sided sound insulation pad with adhesive is provided between the LSU module and the fixing plate, and the sound insulation pad fixes the LSU module in a suspended manner in the noise reduction box;

[0022] Furthermore, the inner heat conducting strips and the outer heat conducting strips are arranged in a comb-teeth structure on both sides of the interior of the noise reduction box body, and the comb-teeth direction of the inner heat conducting strips penetrates the channel of the circulating airflow inside the noise reduction box body.

[0023] Furthermore, the heat conducting block, the inner heat conducting strip and the outer heat conducting strip are hollow structures and are interconnected, and the hollow interior is filled with a flowable conductive liquid.

[0024] The present invention proposes a method and device for reducing and dissipating LSU noise. The beneficial effects include: by providing a vacuum space around the LSU module, the propagation of LSU module noise can be effectively blocked, allowing the LSU module to operate in a silent state. At the same time, an internal circulation airflow is provided through the LSU module to promptly remove heat generated by the internal components of the LSU module during operation and dissipate the heat through heat conduction. The power supply for the internal circulation is also in a vacuum, and the noise generated by the operation is also effectively suppressed. This allows the LSU module to eliminate noise pollution while ensuring good internal heat dissipation, thereby improving the operating performance of the LSU module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a partial cross-sectional structural diagram of the LSU noise reduction and heat dissipation device of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the LSU noise reduction and heat dissipation device of the present invention;

[0028] The markings in the figure are: 1. LSU module; 11. Air inlet slot; 12. Air outlet slot; 2. Noise reduction box; 21. Plane lens; 22. Folded edge; 23. One-way valve interface; 3. Axial fan; 4. Sound insulation pad; 5. Heat conduction block; 51. Inner heat conduction strip; 52. Outer heat conduction strip; 53. Conductive liquid; 6. Fixing plate; 7. Sealing ring; 71. Lip. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific embodiments. These embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The structural features of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] See also Figure 1-2A LSU noise reduction and heat dissipation device includes a noise reduction box body 2, which is detachably arranged on the outside of the LSU module 1. The detachable manner facilitates the installation and subsequent maintenance of the noise reduction box body 2. The light beam output end of the noise reduction box body 2 corresponding to the LSU module 1 is provided with a plane lens 21 adapted to the light beam. The plane lens 21 is used to avoid affecting the light beam projected by the LSU module 1.

[0032] The noise reduction box body 2 is provided with a one-way valve interface 23 for vacuuming. By adopting the one-way valve interface 23, the noise reduction box body 2 can be vacuumed, which is convenient for assembly or maintenance. The noise reduction box body 2 can be in a vacuum state again.

[0033] A fixing plate 6 is provided at the bottom of the noise reduction box body 2, and a folded edge 22 protruding outward is provided on the bottom edge of the noise reduction box body 2 in the circumferential direction. A sealing ring 7 is provided between the folded edge 22 and the fixing plate 6. The sealing ring 7 is located on one side inside the noise reduction box body 2 and is provided with an upwardly protruding lip 71. The lip 71 is in contact with the inner wall of the noise reduction box body 2. The folded edge 22 and the sealing ring 7 are provided to improve the sealing between the noise reduction box body 2 and the fixing plate 6. The lip 71 is provided on the inner circumference of the sealing ring 7 to further provide sealing between the noise reduction box body 2 and the fixing plate 6 to ensure that the noise reduction box body 2 can be in a vacuum state for a long time to avoid leakage.

[0034] An air inlet slot 11 is provided at the top of the shell of the LSU module 1, and air outlet slots 12 are symmetrically provided on both sides of the shell. The air inlet slot 11 and the air outlet slot 12 are connected to the interior of the LSU module 1. An axial flow fan 3 for forming an internal circulation airflow inside the noise reduction box 2 is fixedly provided on the top of the LSU module 1 on the air inlet slot 11. When the axial flow fan 3 is working, the airflow will form a convection structure under the guidance of the air inlet slot 11 and the air outlet slot 12. The air duct passes through the interior of the LSU module 1, taking away the heat generated by the internal operation of the LSU module 1, and the heat flows back and forth along the air duct.

[0035] The heat conduction module 5 is a metal component with an integrated structure. The heat conduction module includes a heat conduction block 5, an inner heat conduction strip 51 and an outer heat conduction strip 52. The heat conduction block 5 adopts a thin strip structure and is fixed on one side of the noise reduction box body 2 in an embedded manner. The inner heat conduction strip 51 and the outer heat conduction strip 52 are respectively arranged on the inner and outer sides of the noise reduction box body 2. The inner heat conduction strip 51 is located on the inner circulation airflow channel above the axial flow fan 3. The heat conduction block 5, the inner heat conduction strip 51 and the outer heat conduction strip 52 are hollow in the interior and are interconnected. The hollow interior is filled with a flowable conduction liquid, which can be a coolant and needs to have good fluidity. When the heat carried in the internal circulation airflow encounters the inner heat conduction strip 51, it will be transferred to the inner heat conduction strip 51 by thermal radiation. Then the inner heat conduction strip 51 and the internal conduction liquid transfer the heat from the inner heat conduction strip 51 to the outer heat conduction strip 52 by heat conduction, and finally the outer heat conduction strip 52 dissipates the heat.

[0036] The inner thermal conductive strips 51 and the outer thermal conductive strips 52 are arranged in a comb-tooth structure on both sides of the interior of the noise reduction box body 2, and the comb-tooth direction of the inner thermal conductive strips 51 passes through the channel of the circulating air flow inside the noise reduction box body 2. The inner thermal conductive strips 51 and the outer thermal conductive strips 52 are arranged in a comb-tooth structure. On the one hand, it is beneficial to increase the receiving area of ​​the inner thermal conductive strips 51 for internal heat, and on the other hand, it is beneficial to increase the heat diffusion area of ​​the outer thermal conductive strips 52, so as to facilitate the dissipation of heat in the LSU module 1.

[0037] A double-sided sound insulation pad 4 with adhesive backing is provided between the LSU module 1 and the fixing plate 6. The sound insulation pad 4 fixes the LSU module 1 in a suspended manner in the noise reduction box 2. The setting of the sound insulation pad 4 is used to reduce the noise propagation at the fixed position of the LSU module 1. At the same time, it can also stably fix the LSU module 1.

[0038] The LSU noise reduction and heat dissipation device of the present invention has a simple structure. By providing a vacuum space around the LSU module 1, the propagation of noise from the LSU module 1 can be effectively blocked, allowing the LSU module 1 to operate in a silent state. At the same time, an internal circulating airflow is provided through the LSU module 1 to promptly remove heat generated by the internal components of the LSU module 1 during operation. While suppressing noise in the LSU module 1, it also ensures good internal heat dissipation, which is beneficial to improving the operating performance of the LSU module.

[0039] A method for reducing noise and dissipating heat in an LSU module for a laser printer, comprising the following steps:

[0040] Step 1: A detachable noise reduction box 2 is provided on the outside of the LSU module 1. The LSU module 1 is placed in a vacuum state by vacuuming. After the vacuum is drawn, the noise reduction box 2 is in a dust-free space, which is beneficial to improving the performance of the LSU module 1.

[0041] Step 2: An internal circulation airflow is formed between the LSU module 1 and the noise reduction box 2 through the internal circulation fan 3. The internal circulation airflow is in an "∞" shape and passes through the interior of the LSU module 1.

[0042] Step 3: A heat conduction component with a metal structure is provided on the inner circulation air flow channel to conduct the heat carried by the inner circulation air flow to the outside of the noise reduction box body 2 through heat exchange.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A LSU noise reduction and heat dissipation method for reducing the noise of the LSU module of a laser printer, characterized in that: The steps include: Step 1: A detachable noise reduction box (2) is provided on the outside of the LSU module (1), and the LSU module (1) is placed in a vacuum state by vacuuming; wherein the noise reduction box (2) is detachably provided on the outside of the LSU module (1), a plane lens (21) adapted to the light beam is provided on the light beam output end of the noise reduction box (2) corresponding to the LSU module (1), a one-way valve interface (23) for vacuuming is provided on the noise reduction box (2), and a fixing plate (6) is provided on the bottom of the noise reduction box (2); Step 2: Using the internal circulation fan (3), an internal circulation airflow is formed between the LSU module (1) and the noise reduction box (2); Step 3: a heat conduction component with a metal structure is provided on the inner circulation airflow channel to conduct the heat carried by the inner circulation airflow to the outside of the noise reduction box (2) by heat exchange; The top of the housing of the LSU module (1) is provided with an air inlet slot (11), and both sides of the housing are symmetrically provided with air outlet slots (12), the air inlet slot (11) and the air outlet slot (12) are connected to the interior of the LSU module (1), and an axial flow fan (3) is fixedly provided on the top of the LSU module (1) on the air inlet slot (11) for forming an internal circulating airflow inside the noise reduction box (2); The heat conduction assembly further comprises a heat conduction block (5), an inner heat conduction strip (51) and an outer heat conduction strip (52); the heat conduction block (5) is fixed on one side of the noise reduction box body (2) in an embedded manner; the inner heat conduction strip (51) and the outer heat conduction strip (52) are respectively arranged on the inner and outer sides of the noise reduction box body (2); the inner heat conduction strip (51) is located on the inner circulation air flow channel above the axial flow fan (3); the inner heat conduction strip (51) and the outer heat conduction strip (52) are arranged on both sides of the interior of the noise reduction box body (2) in a comb-tooth structure, and the comb-tooth direction of the inner heat conduction strip (51) is arranged on the inner circulation air flow channel of the noise reduction box body (2); The inner heat conducting strip (51) and the outer heat conducting strip (52) are arranged in a comb-tooth structure on both sides of the interior of the noise reduction box (2), and the comb-tooth direction of the inner heat conducting strip (51) penetrates the channel of the circulating air flow inside the noise reduction box (2).

2. The LSU noise reduction and heat dissipation method according to claim 1, characterized in that: In step 1, the interior of the noise reduction box (2) is a dust-free and enclosed space.

3. The LSU noise reduction and heat dissipation method according to claim 1, characterized in that: In step 2, the internal circulating airflow is in the shape of "∞" and passes through the interior of the LSU module (1).

4. The LSU noise reduction and heat dissipation method according to claim 1, characterized in that: In step 3, the heat-conducting components are distributed in a tooth-like manner on both the inner and outer sides of the noise reduction box body (2).

5. The LSU noise reduction and heat dissipation method according to claim 1, characterized in that: A folding edge (22) protruding outward is provided on the circumference of the bottom edge of the noise reduction box body (2), and a sealing ring (7) is provided between the folding edge (22) and the fixing plate (6).

6. The LSU noise reduction and heat dissipation method according to claim 5, characterized in that: The sealing ring (7) is provided with an upwardly protruding lip (71) on one side located inside the noise reduction box body (2), and the lip (71) is in contact with the inner wall of the noise reduction box body (2).

7. The LSU noise reduction and heat dissipation method according to claim 1, characterized in that: A double-sided sound insulation pad (4) with adhesive backing is provided between the LSU module (1) and the fixing plate (6), and the sound insulation pad (4) fixes the LSU module (1) in a suspended manner within the noise reduction box (2).

8. The LSU noise reduction and heat dissipation method according to claim 1, characterized in that: The heat conducting block (5), the inner heat conducting strip (51) and the outer heat conducting strip (52) are hollow structures and are interconnected, and the hollow interior is filled with a flowable conductive liquid.

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