A heat dissipation component and laser module

Abstract

The present application provides a heat dissipation assembly and a laser module, comprising: a heat dissipation fan, a first heat dissipation structure and a second heat dissipation structure; the first heat dissipation structure comprises a side plate and a first guide portion, and the heat dissipation fan is arranged on the side plate; the first guide portion is arranged on the side plate in an area outside the heat dissipation fan, and the first guide portion defines a first heat dissipation channel that passes through in a first direction; the second heat dissipation structure is connected to the light-emitting side of the laser generator, and comprises a first through hole and a second guide portion, and the first through hole is used to allow the laser emitted by the laser generator to pass through; the second guide portion corresponds to and is connected to the first guide portion, and defines a second heat dissipation channel that passes through in a second direction, and the second direction forms a preset angle with the first direction; the heat dissipation fan can be operated to form a first heat dissipation airflow passing through the first heat dissipation channel and the second heat dissipation channel, and the first heat dissipation airflow passes through the second heat dissipation channel and blows toward the observation window. The present application can prevent dust from contaminating the observation window while dissipating heat to the laser module.

Description

Technical Field

[0001] The present application relates to the field of laser processing technology, and in particular to a heat dissipation component and a laser module. Background Art

[0002] During laser processing, sometimes the lens on the laser light output path may be affected by its own defects (such as surface wear, internal pores, etc.) or external impurities (such as smoke, etc.), which may affect the normal laser light output, thereby affecting the laser processing effect, or causing the lens to receive too much laser energy due to defects or impurities, resulting in excessive temperature of the lens or even the laser equipment.

[0003] In the related technology, the laser engraving machine will generate smoke and dust when processing materials such as wood boards and paper. When these smoke and dust adhere to the surface of the lens of the laser engraving machine, it will cause loss of laser light output, affecting the printing and cutting effects. At the same time, it may cause the lens to break due to excessive temperature, resulting in the laser module being unable to be used normally. In addition, the smoke and dust will also adhere to the surface of the observation window, making it difficult for the observer to accurately observe the light output conditions. Summary of the invention

[0004] In view of this, the present application provides a heat dissipation component and a laser module, which can dissipate heat for the laser module while preventing dust from contaminating the observation window.

[0005] The first aspect of the present application provides a heat dissipation component for dissipating heat for a laser module, wherein the laser module includes a laser generator and an observation window, wherein the observation window is used to observe the laser light emission, and wherein the heat dissipation component includes: a heat dissipation fan, a first heat dissipation structure, and a second heat dissipation structure; the first heat dissipation structure includes a side plate and a first guide portion, wherein the heat dissipation fan is arranged on the side plate; the first guide portion is arranged on an area on the side plate located outside the heat dissipation fan, wherein the first guide portion defines a first heat dissipation channel extending along a first direction, wherein the first direction is parallel to the light emission direction of the laser generator; the second heat dissipation structure is connected to a light emission side of the laser generator, and includes a first through hole and a second guide portion, wherein the first through hole is used to allow the laser emitted by the laser generator to pass through; the second guide portion corresponds to and is connected to the first guide portion, and defines a second heat dissipation channel extending along a second direction, wherein the second direction forms a preset angle with the first direction; the heat dissipation fan can be operated to form a first heat dissipation airflow passing through the first heat dissipation channel and the second heat dissipation channel, wherein the first heat dissipation airflow passes through the second heat dissipation channel and blows toward the observation window.

[0006] Compared with the related art, the embodiments of the present application have at least the following advantages: by setting a first guide portion, since the first guide portion has a first heat dissipation channel extending along a first direction, the airflow formed after the operation of the heat dissipation fan flows through the first heat dissipation channel, thereby being able to discharge the heat generated when the laser generator is working, thereby achieving the purpose of cooling the laser module; by setting a second guide portion, since the second guide portion has a second heat dissipation channel extending along a second direction, the airflow formed after the operation of the heat dissipation fan flows through the first heat dissipation channel and then blows toward the observation window through the second heat dissipation channel, thereby being able to blow away dust on the surface of the observation window, thereby avoiding dust generated by the laser light from contaminating the observation window, and allowing the observer to accurately observe the laser light output.

[0007] In some possible implementations, the side panel includes a first side panel and a second side panel, the first side panel includes a first side wall and a second side wall bent and extended along the end of the first side wall toward the laser generator; the second side panel includes a third side wall and a fourth side wall bent and extended along the end of the third side wall toward the laser generator, the first side wall and the third side wall are arranged opposite to each other, and the second side wall and the fourth side wall are arranged opposite to each other; the first side wall, the second side wall, the third side wall and the fourth side wall and the second heat dissipation structure are jointly arranged to form a receiving space, and the laser generator is arranged in the receiving space; the first side wall and the third side wall are both provided with the cooling fan, and the observation window is arranged on the side of the second heat dissipation structure away from the laser generator, and is located on the same side as the second side wall.

[0008] In some possible implementations, the laser module also includes a circuit board and an annular shell, the circuit board is arranged on a side of the side plate away from the second heat dissipation structure; the annular shell surrounds the outer periphery of the circuit board and the heat dissipation assembly, the observation window is arranged in a partial area of ​​the annular shell corresponding to the outlet of the laser, and an air outlet is opened in a partial area of ​​the annular shell corresponding to the circuit board; the first heat dissipation structure also includes a third guide portion, the third guide portion defines a third heat dissipation channel that passes through in parallel with the light emitting direction of the laser generator; the heat dissipation fan can operate to form a second heat dissipation airflow passing through the third heat dissipation channel and the air outlet, and the second heat dissipation airflow blows toward the circuit board after passing through the third heat dissipation channel.

[0009] By adopting this technical solution, the temperature of the circuit board can be cooled while the laser generator is cooled.

[0010] In some possible implementations, the first guide portion is a heat dissipation fin, and the heat dissipation fan is at a preset distance from the heat dissipation fin.

[0011] By adopting this technical solution, it is possible to avoid the high-speed airflow generated when the blades of the cooling fan rotate at high speed and the noise generated by the collision with the cooling fins, thereby improving the user experience.

[0012] In some possible implementations, the second heat dissipation structure is a base plate having a first plate surface and a second plate surface that are relatively arranged, and the first plate surface is used to cooperate with and connect to the laser generator, and the first through hole is recessed from the first plate surface and passes through the second plate surface.

[0013] In some possible implementations, the laser module also includes a nozzle having an axial hole, the nozzle is connected to the second plate surface, and the axial hole corresponds to and is connected to the first through hole, for allowing laser emission and allowing laser cutting auxiliary gas to be ejected; after the first heat dissipation airflow blows toward the observation window, it blows back toward the nozzle under the obstruction of the observation window.

[0014] By adopting this technical solution, dust generated by the laser light under the nozzle can be removed, further preventing dust from adhering to the surface of the lens or the observation window, thereby further improving the reliability of the heat dissipation component.

[0015] In some possible implementations, the second guide portion is an oblique air guide plate that passes through the bottom plate, and the oblique air guide plate includes a plurality of air blades that are spaced apart, and the air blades are inclined toward a direction close to the observation window.

[0016] The second aspect of the present application discloses a laser module, comprising: a laser generator for emitting laser; an observation window for observing the laser light emission; the above-mentioned heat dissipation component, the heat dissipation fan of the heat dissipation component can be operated to cool the laser generator and blow a heat dissipation airflow toward the observation window; a circuit board, the circuit board is connected to the first heat dissipation structure of the heat dissipation component away from the second heat dissipation structure of the heat dissipation component; a top plate, indirectly connected to the side of the circuit board away from the second heat dissipation structure; an annular shell, surrounding the outer periphery of the circuit board and the heat dissipation component, and one end opening of the annular shell is covered by the top plate.

[0017] In some possible implementations, the second heat dissipation structure of the heat dissipation assembly is a base plate, and the other end opening of the annular shell is covered by the base plate; the base plate is connected to the light-emitting side of the laser generator, and is provided with a first through hole allowing the laser to pass through; the base plate is provided with an air flow channel; the annular shell is provided with a guide pipe along its axial direction, one end of the guide pipe corresponds to and is connected to the air flow channel, and the other end is used to be connected to a gas source; the laser module also includes a nozzle, the nozzle has an axial hole, the nozzle is connected to the side of the base plate away from the laser generator, and the axial hole corresponds to and is connected to the first through hole and the air flow channel, which is used to allow laser emission and allow laser cutting auxiliary gas to be ejected.

[0018] In some possible implementations, the air flow channel is a second through hole that passes through the bottom plate, and the second through hole is spaced apart from the first through hole.

[0019] In some possible implementations, the laser module further includes a temperature sensor, which is disposed in the flow guide pipe and is used to detect the temperature in the flow guide pipe.

[0020] In some possible implementations, the laser module also includes a module microcontroller, the temperature sensor includes a first thermistor and a second thermistor, the first thermistor is arranged in the guide pipe, and the second thermistor is arranged in a preset auxiliary cavity, and the auxiliary cavity is connected to the external air; the module microcontroller is used to receive a first temperature change in the guide pipe detected by the first thermistor and a second temperature change in the auxiliary cavity detected by the second thermistor, and calculate the flow rate of the auxiliary gas according to the first temperature change and the second temperature change. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A three-dimensional view of a laser module provided in accordance with an embodiment of the present application.

[0023] Figure 2 A three-dimensional schematic diagram of a heat dissipation component and a laser generator hidden behind a ring shell of a laser module provided in one embodiment of the present application.

[0024] Figure 3 A rear side view of a laser module provided by an embodiment of the present application, with the annular shell hidden behind it.

[0025] Figure 4 An exploded view of a partial structure of a laser module provided in one embodiment of the present application.

[0026] Figure 5 An exploded view of another partial structure of a laser module provided in one embodiment of the present application.

[0027] Figure 6 An exploded view of another portion of the structure of the laser module provided in one embodiment of the present application.

[0028] Figure 7 An embodiment of the present application provides Figure 6 A cross-sectional view of a portion of the structure.

[0029] Figure 8 An embodiment of the present application provides Figure 6 Exploded view of part of the structure.

[0030] Fig. 9 An exploded view of a portion of the structure of a laser module hidden behind an annular shell provided in one embodiment of the present application.

[0031] Fig.10 A schematic diagram of the working mode of the laser module provided in one embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0035] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0036] Figures 1 to 10 A specific implementation of the laser module 100 in this embodiment is shown.

[0037] The laser module 100 provided in this embodiment can be used for laser engraving, laser cutting, laser welding, laser drilling, laser heat treatment, laser surface modification (such as laser annealing, laser quenching, laser alloying, laser cladding), laser 3D printing or other known laser processing fields, and can also be used in fields such as laser detection and laser imaging.

[0038] See also Figures 1 to 5 The laser module 100 provided in this embodiment includes: an observation window 101, an annular shell 102, a module LED status indicator 103, a top plate 104, a power cord 105, an air auxiliary air inlet 106, a TYPE-C interface 107, a module status reset button 108, an air outlet 109, a cooling fan air inlet 110 and a laser generator 143.

[0039] The heat dissipation assembly provided in this embodiment includes: a heat dissipation fan 201, a first heat dissipation structure and a second heat dissipation structure. Specifically, the first heat dissipation structure includes a side plate 14 and a first guide portion 202, the heat dissipation fan 201 is arranged on the side plate 14; the first guide portion 202 is arranged on the side plate 14 in an area outside the heat dissipation fan 201; the second heat dissipation structure is connected to the light-emitting side of the laser generator 143, and includes a first through hole K1 and a second guide portion 203, and the first through hole K1 is used to allow the laser emitted by the laser generator 1433 to pass through.

[0040] The laser generator 143 is used to emit laser, and a known laser such as a solid laser, a CO2 laser or other common lasers may be used, which are not limited here.

[0041] The heat dissipation fan 201 can be a common fan, and only needs to be able to form a heat dissipation airflow. In addition, in other embodiments, the heat dissipation fan 201 may not be provided, but other methods (such as water cooling) may be used to achieve heat dissipation.

[0042] In some embodiments, the observation window 101 is made of a red colored lens material, which can filter out the blue light emitted by the laser module, and can transmit most other visible light except the blue light, so that the observer can observe the position and state of the working material normally while avoiding the damage of the blue strong light. It is understandable that the observation window 101 can also be made of lenses of other materials and colors, and this embodiment does not specifically limit this.

[0043] In some embodiments, the outer surface of the annular shell 102 is sandblasted and oxidized so that the outer surface color of the annular shell 102 is consistent with that of the laser generator 143 .

[0044] In some embodiments, the laser module 100 includes three module LED status indicator lights 103 , each of which can display three colors (eg, red, green, and yellow), indicating the working status of the corresponding protection function through different colors.

[0045] In some embodiments, the top plate 104 is a metal cover plate, and the top plate 104 is connected to a power line 105 of the laser module 100 .

[0046] In some embodiments, the laser cutting assist gas is introduced into the laser module 100 through the air assist gas inlet 106 .

[0047] In some embodiments, the laser module 100 may be firmware updated or log information printed via the TYPE-C interface 107 .

[0048] In some embodiments, when the laser module 100 alarm is triggered, the user can reset the current error using the module status reset button 108, and can also switch the engraving / cutting working mode by long pressing the module status reset button 108. The laser module 100 indicates the current working mode through two LEDs.

[0049] Please see further Figure 2 The side plate 14 includes a first side plate 141 and a second side plate 142. The first side plate 141 includes a first side wall 141A and a second side wall 141B that is bent and extended along the end of the first side wall 141A toward the direction close to the laser generator 143; the second side plate 142 includes a third side wall 142A and a fourth side wall 142B that is bent and extended along the end of the third side wall 142A toward the direction close to the laser generator 143. The first side wall 141A and the third side wall 142A are arranged opposite to each other, and the second side wall 141 B and the fourth side wall 142B are arranged opposite to each other; the first side wall 141A, the second side wall 141B, the third side wall 142A, the fourth side wall 142B and the second heat dissipation structure 205 are jointly arranged to form a receiving space 10, and the laser generator is arranged in the receiving space 143; the first side wall 141A and the third side wall 142A are both provided with a cooling fan 201, and the observation window 101 is arranged on the side of the second guide portion 203 away from the laser generator 143, and is located on the same side as the second side wall 141B.

[0050] Please see further Figure 3The first guide portion 202 is disposed on the side plate 104 in an area outside the heat dissipation fan 103. The first guide portion 202 defines a first heat dissipation channel F1 extending along a first direction X, and the first direction X is parallel to the light emitting direction of the laser generator 143. The second guide portion 203 corresponds to and communicates with the first guide portion 202, and defines a second heat dissipation channel F2 extending along a second direction Y, and the second direction Y forms a preset angle with the first direction X.

[0051] Please also see Figure 3 and Figure 4 The first heat dissipation structure also includes a third guide portion 206, which defines a third heat dissipation channel F5 that runs through the light emitting direction of the laser generator 143; the heat dissipation fan 103 can operate to form a second heat dissipation airflow passing through the third heat dissipation channel F5 and the air outlet 109, and the second heat dissipation airflow blows toward the circuit board after passing through the third heat dissipation channel F5. The circuit boards in this embodiment include a first circuit board 120 and a second circuit board 130.

[0052] Please also see Figure 3 and Figure 5 The second heat dissipation structure is a base plate 205, which has a first plate surface 205A and a second plate surface 205B that are arranged opposite to each other. The first plate surface 205A is used to cooperate and connect to the laser generator 143; the first through hole K1 is recessed from the first plate surface 205A and passes through the second plate surface 205B.

[0053] In some embodiments, the first guide portion 202 and the third guide portion 206 are both heat dissipation fins, and the heat dissipation fan 201 is at a preset distance from the heat dissipation fins. This structural arrangement can prevent the high-speed airflow generated when the blades of the heat dissipation fan 201 rotate at high speed from colliding with the heat dissipation fins to generate noise, thereby improving the user experience.

[0054] It is worth mentioning that the heat dissipation fins on the left and right sides of the laser generator 143 have a large heat dissipation area, so that a good heat dissipation effect can be achieved. In addition, a heat dissipation fan 201 is installed on each side of the laser generator 143. Since the heat dissipation capacity of the dual heat dissipation fans 201 is strong enough, the rotation speed of the two heat dissipation fans 201 can be appropriately reduced, thereby achieving the purpose of reducing heat dissipation noise while ensuring the heat dissipation effect.

[0055] It can be understood that this embodiment does not specifically limit the number of cooling fans 201, that is, one or more cooling fans 201 can be provided on the first side wall 141A and the third side wall 142A; this embodiment does not specifically limit the spacing and number of cooling fins 202, and can be set according to actual needs.

[0056] In some embodiments, the second guide portion 203 is an oblique air guide plate that penetrates the bottom plate 205, and the oblique air guide plate 203 includes a plurality of spaced blades, which are inclined toward the observation window 101. It is understood that this embodiment does not specifically limit the number, spacing, and inclination angle of the blades, which can be set according to actual needs.

[0057] The laser module 100 also includes a nozzle 204, which has an axial hole K2. The nozzle 204 is connected to the second plate surface 205B, and the axial hole K2 corresponds to and is connected to the first through hole K1, which is used to allow laser emission and allow laser cutting auxiliary gas to be ejected; after the first heat dissipation airflow blows toward the observation window 101, it blows back toward the nozzle 204 under the obstruction of the observation window 101.

[0058] The flow direction of the first heat dissipation airflow formed when the heat dissipation fan 201 is in operation is shown in the arrow line shown in Figure 4. The side plate 14 in this embodiment is made of metal, and the heat dissipation fins 202 are also made of metal. The side plate 14 is in contact with the laser generator 143. The heat generated by the laser generator 143 when working is conducted through the side plate 14 and transferred to the heat dissipation fins 202. When the first heat dissipation airflow passes through the first heat dissipation channel F1, it takes away the heat of the heat dissipation fins 202, thereby achieving cooling of the laser generator 143. The first heat dissipation airflow after passing through the first heat dissipation channel F1 passes through the second heat dissipation channel F2, and is blown toward the observation window 101 under the action of the oblique air guide plate 203, thereby preventing the dust generated by the laser from polluting the observation window 101. The first heat dissipation airflow is blown in the opposite direction toward the nozzle 204 under the obstruction of the observation window 101, thereby taking away the dust generated by the laser from below the nozzle 204, further preventing the dust from adhering to the surface of the lens or the observation window 101, thereby further improving the reliability of the heat dissipation component.

[0059] See also Figure 4 The laser module 100 further includes a circuit board, which is disposed on a side of the side plate 14 away from the second heat dissipation structure 205 . Figure 4 The illustrated circuit boards include a first circuit board 120 and a second circuit board 130 .

[0060] In this embodiment, the first circuit board 120, the second circuit board 130 and the top plate 104 are sequentially connected to the side of the laser generator 143 away from the bottom plate 205. Optionally, the first circuit board 120 and the second circuit board 130, and the second circuit board 130 and the top plate 104 can be supported at intervals by heightening columns 111, and connected to the laser generator 143 by connecting structures such as long screws 113, so that a safe distance is left between the first circuit board 120 and the second circuit board 130, and between the second circuit board 130 and the top plate 104 to avoid short circuit of the circuit or damage caused by contact between components, and at the same time, it is also beneficial to the heat dissipation of the first circuit board 120 and the second circuit board 130. Of course, the setting position, setting order, etc. of the first circuit board 120, the second circuit board 130 and the top plate 104 can be set as needed and are not limited here.

[0061] Optionally, the first circuit board 120 is connected to the side of the laser generator 143 away from the bottom plate 205 at intervals. The first circuit board 120 is electrically connected to the sensor detection board of the laser module 100, for example, it is electrically connected to the sensor detection board through the first circuit board 120. The first circuit board 120 can receive and process the temperature signal, air pressure signal and flame state signal detected by the temperature sensor, air pressure sensor and flame sensor of the sensor detection board, so as to obtain a control signal for controlling the operation of the laser generator 143.

[0062] Optionally, the second circuit board 130 is connected to the first circuit board 120 at intervals away from the bottom plate 205, for example, the interval connection is achieved by the aforementioned heightening column 111. The second circuit board 130 is electrically connected to the laser generator 143 and the first circuit board 120, and can control the light output of the laser generator 143 according to the control signal. Among them, the electrical connection between the second circuit board 130 and the first circuit board 120 can be connected by a board-to-board connector plug-in connection. The electrical connection between the second circuit board 130 and the laser generator 143 can be that the control signal line of the laser generator 143 is welded to the second circuit board 130. Optionally, a power interface component can also be provided on the second circuit board 130 for plugging in a power cord to realize power supply. The power interface component can be exposed on the top plate 104 (such as by opening a corresponding opening on the top plate 104) to facilitate the insertion of the power cord, and is used to power each power-using structure (such as the first circuit board 120, the second circuit board 130, the laser generator 143, the cooling fan 201, etc.).

[0063] In other embodiments, a single circuit board integrating the functions of the first circuit board 120 and the second circuit board 130 may be used to replace the first circuit board 120 and the second circuit board 130, or the functions of the first circuit board 120 and the second circuit board 130 may be split into three or more small circuit boards for implementation, which is not limited here.

[0064] The top plate 104 is connected to a side of the second circuit board 130 away from the first circuit board 120 at intervals.

[0065] The light guide column 121 indicates the power supply and light emission status of the light source in the laser generator 143. There are two light guide columns 121 in this embodiment. When a voltage of 24V is provided to the light source, it indicates that the power supply is normal, and a green light in the light guide column 121 is lit; when the laser module 100 emits light, the other blue light in the light guide column 121 is lit.

[0066] The annular shell 102 surrounds the first circuit board 120, the second circuit board 130 and the outer periphery of the heat dissipation assembly, and one end opening of the annular shell 102 is covered by the top plate 104, and the other end is covered by the bottom plate 205. In this embodiment, the top plate 104, the bottom plate 205 and the annular shell 102 together serve as the outer shell of the laser module 100. Optionally, a partial area of ​​the annular shell 102 corresponding to the laser outlet is set as an observation window 101, which is used to observe the laser light emission and reduce the impact of the laser on the observer's eyes. In this embodiment, the observation window 101 is set at a position corresponding to the nozzle 204 outlet, and the user can observe the laser light emission state through the eye protection observation window 101. The observation window 101 can be made of known laser-specific eye protection materials to prevent the user's eyes from being damaged by excessive light when observing the laser light emission.

[0067] Please also see Figures 5 to 7 The laser module 100 also includes a sensor detection plate 301 , a heat conductive ring 302 , a first lens 303 , a rubber gasket 304 and a lens pressure ring 305 .

[0068] The first lens 303 is a lens to be detected and is arranged on the optical path of the laser. For example, it is a protective lens used to protect the light-emitting position of the laser generator 143 to prevent external pollutants (such as dust, splashes during laser processing, etc.) from damaging the laser generator 143. In other embodiments, the first lens 303 can also be an internal lens of the laser generator 143, such as a component lens in the optical lens group of the laser generator 143. In this case, the sensor detection board 301 can be used to detect parameters (such as temperature) inside the laser generator 143. In addition, in this embodiment, the temperature of the first lens 303 is also detected, and the degree of dirtiness or damage of the first lens 303 is determined by the detected temperature or temperature rise of the first lens 303, and then used to control the light emission of the laser generator 143. For example, when it is detected that the temperature or temperature rise of the first lens 303 exceeds the allowable range, it is determined that the degree of dirtiness or damage of the first lens 303 is high. At this time, the laser generator 143 is not allowed to emit light to avoid the reduction of the light emission quality of the laser generator 143 or the high temperature damage to the components of the laser module 100. When the laser power of the laser generator 143 is relatively high, this protection function is particularly important, and can reduce the potential safety hazards caused by the increase in laser power. The specific structure or material of the first lens 303 can be set as required, such as using a quartz flat window lens.

[0069] Specifically, the rubber ring 304 is disposed between the first lens 303 and the lens pressure ring 305, and is used as a buffer and seal for the first lens 303. The temperature of the first lens 303 is transmitted to the thermistor of the sensor detection board 301 through the heat conductive ring 302, and the temperature change of the first lens 303 is known by the temperature change of the thermistor, and then the degree of dirtiness of the first lens 303 is judged according to the temperature change of the first lens 303: the dirtier the first lens 303 is, the faster the temperature of the thermistor rises when the laser module 100 emits light.

[0070] The heat-conducting ring 302 has a groove 302A inside, and the groove 302A is filled with heat-conducting glue. After the heat-conducting ring 302 is installed normally, the heat-conducting glue in the groove 302A will wrap the thermistor on the sensor detection board 301 to ensure good heat conduction.

[0071] The lens pressing ring 305 has an external thread and is screwed into the module base plate 205 from the bottom, and the first lens 303 is pressed against the heat-conducting ring 302 through the rubber ring 304; at the same time, two small grooves 305A are opened on one side below the lens pressing ring 305, which are convenient for installation or removal with tools; when cleaning or replacing the first lens 303, the first lens 303 can be removed from the bottom of the module base plate 205 through the lens pressing ring 305 for operation.

[0072] The sensor detection board 301 can be a printed circuit board or other forms of circuit boards. In this embodiment, a temperature sensor, an air pressure sensor and a flame sensor are provided on the side of the sensor detection board 301 away from the laser generator 143. The sensor detection board 301 is connected to the light-emitting side of the laser generator 143, and the sensor detection board 301 is provided with a first via K3 for allowing the laser emitted by the laser generator 143 to pass through. The temperature sensor is provided in an area located outside the first via K3 on a side surface of the sensor detection board 301. The area located outside the first via K3 on a side surface of the sensor detection board 301 mentioned here can be an annular area or other shaped area concentric with the first via K3 on the side surface of the sensor detection board 301 (shown as a side surface away from the laser generator 143). In this embodiment, the temperature sensor can be a thermistor or other forms, as long as it can collect the temperature information of the first lens 303. The temperature information can be directly processed or pre-processed on the sensor detection board 301, or can be transmitted to other processing units of the laser module 100 (such as the part used for data processing on the second circuit board 120), which is not limited here.

[0073] See also Figure 6 , which is an exploded view of another part of the structure of the laser module provided in the embodiment of the present application. The sensor detection board 301 is provided with a first flame sensor 310 and a second flame sensor 311, both of which are used to perform real-time flame detection on the area near the nozzle 204. When one or both of the first flame sensor 310 and the second flame sensor 311 detect a flame, the flame sensor that detects the flame sends out an alarm, and the laser module 100 stops emitting light.

[0074] Please see further Figure 6 The bottom plate 205 is provided with a flame detection window 213 in the area facing the first flame sensor 310 and the second flame sensor 311, and an infrared filter 213A is attached to the side of the flame detection window 213 away from the flame sensor. The infrared filter 213A can filter non-infrared light waves, and can also prevent laser emission and other indoor light from interfering with the first flame sensor 310 and the second flame sensor 311, and can also prevent external dust from entering the laser module 100, causing dust accumulation in the circuits and devices inside the laser module 100.

[0075] It should be noted that the holes on the optical path of the laser emitted by the aforementioned laser generator 143 are all coaxially arranged. Of course, in other embodiments, if there are additional optical elements (such as reflectors, refracting mirrors, etc.) on the laser optical path to change the direction of the laser optical path, the holes on the laser optical path may also be non-coaxial.

[0076] like Figure 8As shown in FIG. 1 , a temperature sensor is provided on the side of the sensor detection board 301 away from the laser generator 143 as an example. There are four temperature sensors in total, and the four temperature sensors 306, 307, 308 and 309 are evenly distributed around the first via K3. Of course, the number of temperature sensors can also be one or more of other numbers, and the distribution mode can be evenly distributed around the circumference or unevenly distributed; the distances from the multiple temperature sensors to the first via K3 can be equal or unequal. When they are unequal, the temperatures detected by the multiple sensors may indicate the temperature conditions of the first lens 303 at different distances from the center of the first via K3.

[0077] In this embodiment, the temperature sensor may be an analog sensor, a digital sensor, or a sensor in other forms.

[0078] This embodiment adopts the form of indirect thermal coupling, such as Figures 5 to 8 As shown, the heat-conducting ring 302 is annular and has a second via hole K4, which corresponds to the first via hole K3 and is used to allow the laser to pass through. One side of the heat-conducting ring 302 is thermally coupled to the temperature sensor (may be in direct contact or not), and the other side is thermally coupled to the first lens 303 (may be in direct contact or not). Optionally, one side of the heat-conducting ring 302 is glued and bonded to the sensor detection board 301 and at least covers the area where the temperature sensor is located, and the other side is attached to the first lens 303 (but not bonded), so that the first lens 303 (is easier to remove when it needs to be cleaned or replaced. Of course, the heat-conducting ring 302 can also be set in a way that both sides are bonded or both sides are not bonded. In this embodiment, an annular heat-conducting silicone sheet is used as the heat-conducting structure. Its soft material effect can provide good wrapping contact and buffering for the temperature sensor. The annular design retains the optical channel while helping to conduct the temperature of the first lens 303 to the temperature sensor, and is conducive to the first lens 303 sealing the first via K3 through the annular heat-conducting silicone sheet, thereby improving the protection of the light output channel of the laser generator 143.

[0079] Of course, in other embodiments, the heat-conducting ring 302 may also be in other forms besides heat-conducting silicone, and is not limited to being in solid, colloidal, liquid or a combination of forms.

[0080] In an optional embodiment, the rubber gasket 303 is accommodated in the first through hole K1, and one side of the rubber gasket 303 abuts against the bottom surface of the first through hole K1, and the other side elastically presses the first lens 303 against the sensor detection board 301. In the assembled state, the rubber gasket 303 can be in a certain degree of compression state to elastically press the first lens 303 against the sensor detection board 301 or the middle heat conductive ring 302. The rubber gasket 303 can also play a buffering and protective role for the first lens 303.

[0081] The sensor detection board 301 in some implementations of this embodiment adopts a direct or indirect contact lens dirt detection solution, which has the advantages of low cost, small size, simple production and assembly, etc. During the light emitting operation of the laser module 100, smoke and dust generated when cutting materials such as wood, for example, accumulate on the surface of the protective lens after long-term use. When the laser emits light, the loss of laser light emitted by dirty objects will be converted into heat energy, causing the temperature of the lens to rise. When the lens temperature or temperature rise is detected to be abnormal (for example, the temperature rise is set to >0.15℃ / S), it can be determined that the first lens 303 is dirty beyond the allowable value, and the light is turned off in time, and an alarm message is fed back to prompt the user to clean or replace the lens, so as to avoid irreversible damage such as lens splitting caused by lens dirt, while ensuring the light emitting processing effect of the laser module 100.

[0082] See also Fig. 9 The bottom plate 205 is provided with an air flow channel F3; the annular shell 102 is provided with a guide pipe F4 along its axial direction, one end of the guide pipe F4 corresponds to the air flow channel F3, and the other end is used to connect to a gas source; the nozzle 204 is connected to the side of the bottom plate 205 away from the laser generator 143, and the shaft hole K2 corresponds to and connects the first through hole K1 and the air flow channel F3, which is used to allow the laser to be emitted and the laser cutting auxiliary gas to be ejected. Figure 8 It can be seen from the figure that the air flow channel F3 is a second through hole that penetrates the bottom plate, and the second through hole is spaced apart from the first through hole K1.

[0083] Specifically, Fig. 9 The dotted line shows the air flow path. The laser cutting auxiliary gas is connected to the air inlet 106 through the rubber hose, passes through the guide pipe F4 to the bottom plate 205, and then passes through the air flow channel F3 of the bottom plate 205 to be ejected from the nozzle 204.

[0084] Please see further Fig. 9 The bottom plate 205 is provided with an air pressure detection hole 210, which is connected to the air flow channel F3 and is used to detect the air flow temperature of the auxiliary gas.

[0085] In addition, a sealing ring 211 is provided on the bottom plate 205. The sealing ring 211 is attached to the bottom plate 205. The shape of the through hole opened by the sealing ring 211 matches the first through hole K1 and the second through hole. The sealing ring 211 is used to enhance the airtightness of the laser module 100 and prevent dust in the air from entering the interior of the laser module 100.

[0086] In some embodiments, the laser module 100 further includes a temperature sensor, which is disposed in the flow guiding pipe F4 and is used to detect the temperature in the flow guiding pipe F4.

[0087] See also Fig.10 , is a schematic diagram of the working mode of the laser module provided in the embodiment of the present application. Fig.10 As shown, the laser module 100 also includes a module microcontroller, and the temperature sensor includes a first thermistor PTC-a and a second thermistor PTC-b, the first thermistor PTC-a is arranged in the guide pipe F4, and the second thermistor PTC-b is arranged in a preset auxiliary cavity, and the auxiliary cavity is connected to the external air; the module microcontroller is used to receive a first temperature change in the guide pipe F4 detected by the first thermistor PTC-a and a second temperature change in the auxiliary cavity detected by the second thermistor PTC-b, and calculate the flow rate of the auxiliary gas in the guide pipe F4 according to the first temperature change and the second temperature change.

[0088] For ease of understanding, the following is a specific description of how the module microcontroller calculates the flow rate of the auxiliary gas in the diversion pipe F4: the voltage of power supply A is higher than the voltage of power supply B; the voltage of power supply A is used to quickly heat the PTC-a thermistor; the voltage of power supply B is lower and is used for ADC detection after the heating of the PTC-a thermistor is completed; only one power supply is connected at the same time, and the time for each power supply to be connected is determined by the module microcontroller program; the switching circuit S can be a relay, a triode or a MOS tube circuit, etc., and the working principle is: the thermistors PTC-a and PTC-b are PTC thermistors, and the resistance value rises when the temperature rises. High, the change of its occupied voltage is detected by ADC, and the corresponding temperature change can be calculated after conversion; at the same time, the positive temperature characteristic of PTC can prevent the device from being burned out by excessive current during heating; PTC-a is placed on the guide pipe F4, and the air auxiliary flow rate is judged by calculating the cooling speed after each heating; the cooling speed is fast when the air flow is large, and the cooling speed is slow when the air flow is small; PTC-b is used for reference and is placed in the preset auxiliary cavity. The air is connected to the auxiliary cavity but does not flow. The parameters are synchronously detected and compared with those of PTC-a to eliminate the influence of air temperature on the cooling speed of PTC-a.

[0089] Compared with the related art, the embodiments of the present application have at least the following advantages: by setting a first guide portion, since the first guide portion has a first heat dissipation channel extending along a first direction, the airflow formed after the operation of the heat dissipation fan flows through the first heat dissipation channel, thereby being able to discharge the heat generated when the laser generator is working, thereby achieving the purpose of cooling the laser module; by setting a second guide portion, since the second guide portion has a second heat dissipation channel extending along a second direction, the airflow formed after the operation of the heat dissipation fan flows through the first heat dissipation channel and then blows toward the observation window through the second heat dissipation channel, thereby being able to blow away dust on the surface of the observation window, thereby avoiding dust generated by the laser light from contaminating the observation window, and allowing the observer to accurately observe the laser light output.

[0090] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A heat dissipation assembly for dissipating heat from a laser module, wherein the laser module comprises a laser generator and an observation window, wherein the observation window is used to observe the laser light emission, and wherein: The heat dissipation assembly comprises: a heat dissipation fan, a first heat dissipation structure and a second heat dissipation structure; The laser module includes three module LED status indicators, each of which can display three colors, indicating the working status of the corresponding protection function through different colors; The first heat dissipation structure includes a side plate and a first guide portion, the heat dissipation fan is arranged on the side plate; the first guide portion is arranged on the area of ​​the side plate located outside the heat dissipation fan, and the first guide portion defines a first heat dissipation flow channel extending along a first direction, and the first direction is parallel to the light emitting direction of the laser generator; The second heat dissipation structure is connected to the light-emitting side of the laser generator, and includes a first through hole and a second guide portion, wherein the first through hole is used to allow the laser emitted by the laser generator to pass through; the second guide portion corresponds to and is connected to the first guide portion, and defines a second heat dissipation channel that passes through along a second direction, and the second direction forms a preset angle with the first direction; The heat dissipation fan can be operated to form a first heat dissipation airflow passing through the first heat dissipation flow channel and the second heat dissipation flow channel, and the first heat dissipation airflow is blown toward the observation window after passing through the second heat dissipation flow channel.

2. The heat dissipation assembly according to claim 1, characterized in that: The side plate includes a first side plate and a second side plate, the first side plate includes a first side wall and a second side wall bent and extended along the end of the first side wall toward the direction close to the laser generator; the second side plate includes a third side wall and a fourth side wall bent and extended along the end of the third side wall toward the direction close to the laser generator, the first side wall and the third side wall are arranged opposite to each other, and the second side wall and the fourth side wall are arranged opposite to each other; The first side wall, the second side wall, the third side wall, the fourth side wall and the second heat dissipation structure are jointly arranged to form a receiving space, and the laser generator is arranged in the receiving space; The cooling fan is disposed on both the first side wall and the third side wall. The observation window is disposed on a side of the second guide portion away from the laser generator and is located on the same side as the second side wall.

3. The heat dissipation assembly according to claim 2, characterized in that: The laser module further comprises a circuit board and an annular shell, wherein the circuit board is arranged on a side of the side plate away from the second heat dissipation structure; the annular shell surrounds the outer periphery of the circuit board and the heat dissipation assembly, the observation window is arranged in a partial area of ​​the annular shell corresponding to the outlet of the laser, and an air outlet is opened in a partial area of ​​the annular shell corresponding to the circuit board; The first heat dissipation structure further includes a third guide portion, wherein the third guide portion defines a third heat dissipation channel extending parallel to the light emitting direction of the laser generator; The heat dissipation fan can be operated to form a second heat dissipation airflow passing through the third heat dissipation channel and the air outlet, and the second heat dissipation airflow is blown toward the circuit board after passing through the third heat dissipation channel.

4. The heat dissipation assembly according to any one of claims 1 to 3, characterized in that: The first guide portion is a heat dissipation fin, and the heat dissipation fan is at a preset distance from the heat dissipation fin.

5. The heat dissipation assembly according to claim 1, wherein: The second heat dissipation structure is a bottom plate, the bottom plate has a first plate surface and a second plate surface which are arranged opposite to each other, and the first plate surface is used for being connected to the laser generator; The first through hole is recessed from the first plate surface and passes through the second plate surface.

6. The heat dissipation assembly according to claim 5, characterized in that: The laser module further includes a nozzle having an axial hole, the nozzle is connected to the second plate surface, and the axial hole corresponds to and communicates with the first through hole, and is used to allow the laser to be emitted and the laser cutting auxiliary gas to be ejected; After the first heat dissipation airflow blows toward the observation window, it blows back toward the nozzle under the obstruction of the observation window.

7. The heat dissipation assembly according to claim 5, characterized in that: The second guide portion is an oblique air guide plate penetrating the bottom plate, and the oblique air guide plate includes a plurality of air blades arranged at intervals, and the air blades are inclined toward a direction close to the observation window.

8. A laser module, characterized in that: include: A laser generator, used for emitting laser light; Observation window, used to observe the laser light output; The heat dissipation assembly according to any one of claims 1 to 7, wherein the heat dissipation fan of the heat dissipation assembly is capable of running a heat dissipation airflow, and the heat dissipation airflow is used to cool the laser generator and blow toward the observation window; A circuit board, the circuit board is connected to a side of the first heat dissipation structure of the heat dissipation assembly away from the second heat dissipation structure of the heat dissipation assembly; A top plate, indirectly connected to a side of the circuit board away from the second heat dissipation structure; An annular shell surrounds the outer periphery of the circuit board and the heat dissipation assembly, and an opening at one end of the annular shell is covered by the top plate; The laser module includes three module LED status indicator lights, each of which can display three colors, indicating the working status of the corresponding protection function through different colors.

9. The laser module according to claim 8, characterized in that: The second heat dissipation structure of the heat dissipation assembly is a bottom plate, and the other end opening of the annular shell is covered by the bottom plate; The bottom plate is connected to the light-emitting side of the laser generator and is provided with a first through hole for allowing the laser to pass through; the bottom plate is provided with an air flow channel; The annular shell is provided with a flow guide pipe along its axial direction, one end of the flow guide pipe is correspondingly connected to the air flow channel, and the other end is used to connect to an air source; The laser module also includes a nozzle having an axial hole. The nozzle is connected to a side of the base plate away from the laser generator, and the axial hole corresponds to and connects the first through hole and the air flow channel to allow laser emission and laser cutting auxiliary gas to be ejected.

10. The laser module according to claim 9, characterized in that: The air flow channel is a second through hole penetrating the bottom plate, and the second through hole is spaced apart from the first through hole.

11. The laser module according to claim 9, characterized in that: The laser module further includes a temperature sensor, which is disposed in the flow guiding pipe and is used to detect the temperature in the flow guiding pipe.

12. The laser module according to claim 11, characterized in that: The laser module further includes a module microcontroller, the temperature sensor includes a first thermistor and a second thermistor, the first thermistor is arranged in the guide pipe, the second thermistor is arranged in a preset auxiliary cavity, and the auxiliary cavity is in communication with the external air; The module microcontroller is used to receive a first temperature change in the flow guide pipe detected by the first thermistor and a second temperature change in the auxiliary cavity detected by the second thermistor, and calculate the flow rate of the auxiliary gas according to the first temperature change and the second temperature change.

Images