CN116372402A

CN116372402A - Radiating assembly and laser module

Info

Publication number: CN116372402A
Application number: CN202310372879.1A
Authority: CN
Inventors: 敖丹军; 黎铭文; 曹发阳
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-07-04

Abstract

The application provides a radiating component and laser module, include: 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 part, and the heat dissipation fan is arranged on the side plate; the first guide part is arranged in a region, located outside the cooling fan, of the side plate and defines a first cooling flow passage penetrating along 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 part, wherein the first through hole is used for allowing laser emitted by the laser generator to pass through; the second guide part corresponds to and is communicated with the first guide part to define a second heat dissipation flow passage communicated along a second direction, and the second direction and the first direction form a preset included angle; the heat radiation fan can operate to form a first heat radiation air flow passing through the first heat radiation flow channel and the second heat radiation flow channel, and the first heat radiation air flow passes through the second heat radiation flow channel and then is blown to the observation window. This application can avoid dust pollution observation window when giving laser module heat dissipation.

Description

Radiating assembly and laser module

Technical Field

The application relates to the technical field of laser processing, in particular to a heat dissipation assembly and a laser module.

Background

In laser processing, the problem that the lens on the laser light-emitting path affects the normal light-emitting of laser due to the defects (such as surface abrasion, internal air holes and the like) or external impurities (such as smoke dust and the like) of the lens, so that the laser processing effect is affected, or the lens receives excessive laser energy due to the defect or impurity influence, so that the temperature of the lens and even laser equipment is too high can sometimes occur.

In the related art, when a laser engraving machine processes materials such as wood boards, paper and the like, smoke dust is generated, when the smoke dust is attached to the surface of a lens of the laser engraving machine, the loss of laser light emission is caused, the printing and cutting effects are affected, and meanwhile, the lens is possibly broken due to overhigh temperature, so that a laser module cannot be normally used; in addition, smoke may adhere to the surface of the observation window, making it difficult for the observer to observe the light emission accurately.

Disclosure of Invention

In view of this, this application provides a radiator unit and laser module, can avoid dust pollution observation window when giving laser module heat dissipation.

A first aspect of the present application provides a cooling module for dispel the heat to laser module, laser module includes laser generator and observation window, the observation window is used for observing the laser light-emitting condition, cooling module includes: 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 part, and the heat dissipation fan is arranged on the side plate; the first guide part is arranged in a region, located outside the cooling fan, of the side plate, and defines a first cooling flow channel penetrating 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 comprises a first through hole and a second guide part, wherein the first through hole is used for allowing laser emitted by the laser generator to pass through; the second guide part corresponds to and is communicated with the first guide part, a second heat dissipation flow passage penetrating along a second direction is limited, and a preset included angle is formed between the second direction and the first direction; the heat radiation fan can operate to form a first heat radiation airflow passing through the first heat radiation flow channel and the second heat radiation flow channel, and the first heat radiation airflow passes through the second heat radiation flow channel and then is blown to the observation window.

Compared with the related art, the embodiment of the application has at least the following advantages: by arranging the first guide part, the first guide part is provided with the first heat dissipation flow passage penetrating along the first direction, so that air flow formed after the heat dissipation fan operates flows through the first heat dissipation flow passage, heat generated when the laser generator works can be led out, and the purpose of cooling the laser module is achieved; through setting up second guide part, because second guide part has the second heat dissipation runner that link up along the second direction for the air current that forms after radiator fan operation blows to the observation window through the second heat dissipation runner after flowing through first heat dissipation runner, thereby can blow away the dust on observation window surface, avoided the dust pollution observation window that laser light-emitting produced, the light-emitting condition of observation laser that makes the observer can be accurate.

In some possible implementations, 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 extending along an end of the first side wall in a bending direction toward the laser generator; the second side plate comprises a third side wall and a fourth side wall which is bent and extended along the tail end of the third side wall towards the direction close to the laser generator, the first side wall and the third side wall are oppositely arranged, and the second side wall and the fourth side wall are oppositely arranged; the first side wall, the second side wall, the third side wall, the fourth side wall and the second heat dissipation structure are arranged together to form an accommodating space in a surrounding mode, and the laser generator is arranged in the accommodating space; the first side wall and the third side wall are both provided with the cooling fan, and the observation window is arranged on one side, far away from the laser generator, of the second cooling structure and is positioned on the same side as the second side wall.

In some possible implementations, the laser module further includes a circuit board and an annular shell, the circuit board being disposed on a side of the side plate remote from the second heat dissipation structure; the annular shell surrounds the 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 laser outlet, and an air outlet is formed in a partial area of the annular shell corresponding to the circuit board; the first heat dissipation structure further comprises a third guide part, and the third guide part defines a third heat dissipation flow passage communicated along a light emitting direction parallel to the laser generator; the heat dissipation fan can operate to form second heat dissipation airflow passing through the third heat dissipation flow channel and the air outlet, and the second heat dissipation airflow is blown to the circuit board after passing through the third heat dissipation flow channel.

By adopting the technical scheme, the circuit board can be cooled while the laser generator is cooled.

In some possible implementations, the first guide portion is a heat sink fin, and the heat sink fan is spaced from the heat sink fin by a predetermined distance.

By adopting the technical scheme, the noise generated by collision between the high-speed air flow generated when the fan blade of the cooling fan rotates at high speed and the cooling fins can be avoided, and the use experience of a user is improved.

In some possible implementations, the second heat dissipating structure is a bottom plate having a first plate surface and a second plate surface disposed opposite to each other, the first plate surface being adapted to be cooperatively connected to the laser generator, the first through hole being recessed from the first plate surface and penetrating through the second plate surface.

In some possible implementations, the laser module further includes a nozzle, the nozzle having an axle hole, the nozzle being connected to the second board surface, and the axle hole corresponding to and communicating with the first through hole, for allowing laser emission and allowing laser cutting auxiliary gas emission; and after the first radiating airflow is blown to the observation window, the first radiating airflow is reversely blown to the nozzle under the blocking of the observation window.

By adopting the technical scheme, dust generated by laser light emission below the nozzle can be taken away, and the dust is further prevented from adhering to the surface of the lens or the observation window, so that the reliability of the heat radiation assembly is further improved.

In some possible implementations, the second guiding portion is an oblique air guiding piece penetrating through the bottom plate, the oblique air guiding piece includes a plurality of blades arranged at intervals, and the blades incline towards a direction close to the observation window.

The second aspect of the application discloses a laser module, including: a laser generator for emitting laser; the observation window is used for observing the laser light-emitting condition; the radiating assembly is characterized in that the radiating fan of the radiating assembly can be used for operating radiating airflow for cooling the laser generator and blowing the radiating airflow to the observation window; the circuit board is connected to one side of the first heat dissipation structure of the heat dissipation assembly, which is far away from the second heat dissipation structure of the heat dissipation assembly; the top plate is indirectly connected to one side, far away from the second heat dissipation structure, of the circuit board; the annular shell is surrounded on the periphery of the circuit board and the periphery of the heat dissipation assembly, and one end opening of the annular shell is covered by the top plate.

In some possible implementations, the second heat dissipating structure of the heat dissipating assembly is a bottom plate, and the opening at the other end 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 allowing the laser to pass through; the bottom plate is provided with an airflow channel; the annular shell is provided with a diversion pipeline along the axial direction of the annular shell, one end of the diversion pipeline is correspondingly communicated with the airflow channel, and the other end of the diversion pipeline is used for being connected to an air source; the laser module further comprises a nozzle, the nozzle is provided with a shaft hole, the nozzle is connected to one side, far away from the laser generator, of the bottom plate, and the shaft hole corresponds to and is communicated with the first through hole and the air flow channel, and the nozzle is used for allowing laser to emit and allowing laser cutting auxiliary gas to emit.

In some possible implementations, the airflow channel is a second through hole penetrating the bottom plate, and the second through hole is spaced from the first through hole.

In some possible implementations, the laser module further includes a temperature sensor disposed within the flow conduit for detecting a temperature within the flow conduit.

In some possible implementations, the laser module further includes a module microcontroller, and the temperature sensor includes a first thermistor and a second thermistor, where the first thermistor is disposed in the flow guide pipeline, and the second thermistor is disposed in a preset auxiliary cavity, and the auxiliary cavity is in communication with air from the outside; the module microcontroller is used for receiving the first temperature change in the diversion pipeline detected by the first thermistor and the second temperature change in the auxiliary cavity detected by the second thermistor, and calculating the flow of the auxiliary gas according to the first temperature change and the second temperature change.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a three-dimensional view of a laser module according to an embodiment of the present application.

Fig. 2 is a three-dimensional schematic diagram of a heat dissipating assembly and a laser generator of the laser module provided in an embodiment of the present application after hiding the annular shell.

Fig. 3 is a rear side view of a laser module according to an embodiment of the present disclosure after hiding a ring-shaped case.

Fig. 4 is an exploded view of a part of a laser module according to an embodiment of the present disclosure.

Fig. 5 is an exploded view of another part of the structure of the laser module according to an embodiment of the present application.

Fig. 6 is an exploded view of a further part of the structure of a laser module according to an embodiment of the present application.

Fig. 7 is a cross-sectional view of a portion of the structure of fig. 6 provided in an embodiment of the present application.

Fig. 8 is an exploded view of a portion of the structure of fig. 6 provided in an embodiment of the present application.

Fig. 9 is an exploded view of a part of a laser module according to an embodiment of the present disclosure after hiding a ring-shaped case.

Fig. 10 is a schematic diagram of an operation mode of a laser module according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Fig. 1 to 10 show a specific implementation of a laser module 100 in the present embodiment.

The laser module 100 provided in this embodiment may be used in 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 may also be used in the fields such as laser detection, laser imaging, etc.

Referring to fig. 1 to 5, a laser module 100 provided in this embodiment includes: the device comprises an observation window 101, an annular shell 102, a module LED status indicator lamp 103, a top plate 104, a power line 105, an air auxiliary air inlet 106, a TYPE-C interface 107, a module status reset key 108, an air outlet 109, a radiator fan air inlet 110 and a laser generator 143.

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 guiding portion 202, and a heat dissipation fan 201 is disposed on the side plate 14; the first guide 202 is provided on the side plate 14 in a region outside the heat radiation 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 guiding portion 203, where the first through hole K1 is used for allowing the laser emitted by the laser generator 1433 to pass through.

The laser generator 143 is used to emit laser light, and a known laser, such as a solid state laser, a CO2 laser, or other common laser, is not limited herein.

The heat dissipation fan 201 may be a conventional fan type, and may be capable of forming a heat dissipation air flow. In other embodiments, the heat dissipation fan 201 may not be provided, but may be implemented by other manners (such as water cooling).

In some embodiments, the observation window 101 is made of a red colored lens material, and the lens made of the red colored lens material can filter out blue light when the laser module emits laser, and most of other visible light except the blue light can be transmitted, so that an observer can normally observe the position and the state of the working material and avoid blue strong light injury. It is to be understood that the viewing window 101 may also be made of other materials and colors, which are not particularly limited in this embodiment.

In some embodiments, the outer surface of the annular shell 102 is sandblasted oxidized to conform the outer surface of the annular shell 102 to the laser generator 143.

In some embodiments, the laser module 100 includes three module LED status indicators 103, each module LED status indicator 103 can display three colors (such as red, green and yellow), and the working status of the corresponding protection function is indicated by different colors.

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

In some embodiments, laser cutting assist gas is coupled into the laser module 100 through an air assist gas inlet 106.

In some embodiments, a firmware update or log information printing of laser module 100 may be performed through TYPE-C interface 107.

In some embodiments, when triggering the alarm of the laser module 100, the user can set the current error through the module status reset key 108, and can switch the carving/cutting operation mode by pressing the module status reset key 108 for a long time, and the laser module 100 indicates the current operation mode through two LEDs.

Referring further to fig. 2, the side plate 14 includes a first side plate 141 and a second side plate 142, and the first side plate 141 includes a first side wall 141A, and a second side wall 141B extending along an end of the first side wall 141A in a bending direction toward the laser generator 143; the second side plate 142 includes a third side wall 142A, a fourth side wall 142B extending along the end of the third side wall 142A in a bending direction toward the laser generator 143, the first side wall 141A and the third side wall 142A being disposed opposite each other, and the second side wall 141B and the fourth side wall 142B being disposed opposite 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 enclosed together to form an accommodating space 10, and the laser generator is arranged 143 in the accommodating space 10; the first side wall 141A and the third side wall 142A are respectively provided with a cooling fan 201, and the observation window 101 is disposed on one side of the second guiding portion 203 away from the laser generator 143 and on the same side as the second side wall 141B.

Referring to fig. 3, a first guiding portion 202 is disposed on the side plate 104 at an area outside the heat dissipating fan 103, and the first guiding portion 202 defines a first heat dissipating flow path F1 penetrating along a first direction X parallel to the light emitting direction of the laser generator 143. The second guiding portion 203 corresponds to and communicates with the first guiding portion 202, and defines a second heat dissipation flow channel F2 penetrating along a second direction Y, where the second direction Y forms a preset included angle with the first direction X.

Referring to fig. 3 and fig. 4 together, the first heat dissipation structure further includes a third guiding portion 206, and the third guiding portion 206 defines a third heat dissipation flow path F5 that penetrates along a direction parallel to the light emitting direction of the laser generator 143; the heat dissipation fan 103 is operable to form a second heat dissipation airflow passing through the third heat dissipation flow path F5 and the air outlet 109, and the second heat dissipation airflow is blown to the circuit board after passing through the third heat dissipation flow path F5, and the circuit board in this embodiment includes a first circuit board 120 and a second circuit board 130.

Referring to fig. 3 and fig. 5, the second heat dissipation structure is a bottom plate 205, the bottom plate 205 has a first plate surface 205A and a second plate surface 205B disposed opposite to each other, and the first plate surface 205A is used for being cooperatively connected to the laser generator 143; the first through hole K1 is recessed from the first plate surface 205A and penetrates the second plate surface 205B.

In some embodiments, the first guide portion 202 and the third guide portion 206 are heat dissipation fins, and the heat dissipation fan 201 is spaced apart from the heat dissipation fins by a predetermined distance. Through the arrangement of the structure, noise generated by collision between high-speed air flow generated when the fan blades of the cooling fan 201 rotate at high speed and the cooling fins can be avoided, and the use experience of a user is improved.

It should be noted that the heat dissipation fins located at the left and right sides of the laser generator 143 have a larger heat dissipation area, so that a good heat dissipation effect can be achieved. In addition, one cooling fan 201 is respectively installed at the left and right sides of the laser generator 143, and the cooling capacity of the double cooling fans 201 is strong enough to properly reduce the rotation speeds of the two cooling fans 201, thereby achieving the purpose of reducing the cooling noise while ensuring the cooling effect.

It is to be understood that the number of the heat dissipation fans 201 is not particularly limited in this embodiment, that is, one or more heat dissipation fans 201 may be disposed on the first side wall 141A and the third side wall 142A; the space and the number of the heat dissipation fins 202 are not particularly limited in this embodiment, and may be set according to actual requirements.

In some embodiments, the second guiding portion 203 is an oblique air guiding piece penetrating through the bottom plate 205, and the oblique air guiding piece 203 includes a plurality of blades disposed at intervals, and the blades are inclined towards a direction approaching the observation window 101. It can be understood that the number, the pitch and the inclination angle of the fan blades are not particularly limited in this embodiment, and may be set according to actual requirements.

The laser module 100 further includes a nozzle 204, the nozzle 204 has a shaft hole K2, the nozzle 204 is connected to the second plate surface 205B, and the shaft hole K2 corresponds to and is communicated with the first through hole K1, for allowing laser to emit and allowing laser cutting auxiliary gas to emit; after the first heat radiation air flow is blown to the observation window 101, the first heat radiation air flow is reversely blown to the nozzle 204 under the blocking of the observation window 101.

The flow direction of the first heat dissipation air flow formed during the operation of the heat dissipation fan 201 is referred to as arrow line shown in fig. 4, the side plate 14 in this embodiment is made of metal, the heat dissipation fins 202 are also made of metal, the side plate 14 contacts with the laser generator 143, the heat generated during the operation of the laser generator 143 is led out and transferred to the heat dissipation fins 202 via the side plate 14, and the heat of the heat dissipation fins 202 is taken away when the first heat dissipation air flow passes through the first heat dissipation flow channel F1, so as to realize the cooling of the laser generator 143. The first heat dissipation air flow after passing through the first heat dissipation flow channel F1 passes through the second heat dissipation flow channel F2 and is blown to the observation window 101 under the action of the inclined air guide piece 203, so that dust generated by laser light emission can be prevented from polluting the observation window 101, the first heat dissipation air flow is reversely blown to the nozzle 204 under the blocking of the observation window 101, dust generated by laser light emission below the nozzle 204 can be taken away, dust is further prevented from being attached to the surface of the lens or the observation window 101, and the reliability of the heat dissipation assembly is further improved.

Referring to fig. 4, the laser module 100 further includes a circuit board disposed on a side of the side plate 14 away from the second heat dissipation structure 205. The circuit board shown in fig. 4 includes a first circuit board 120 and a second circuit board 130.

In this embodiment, the first circuit board 120, the second circuit board 130 and the top board 104 are sequentially connected to a side of the laser generator 143 away from the bottom board 205. Optionally, the first circuit board 120 and the second circuit board 130, and the second circuit board 130 and the top plate 104 may be supported at intervals by the raised posts 111, and connected to the laser generator 143 by a long connection structure such as a long screw 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, thereby avoiding shorting of circuits or touch damage between components, and simultaneously facilitating heat dissipation of the first circuit board 120 and the second circuit board 130. Of course, the arrangement positions, the arrangement order, and the like of the first circuit board 120, the second circuit board 130, and the top plate 104 may be set as needed, and are not limited thereto.

Alternatively, the first circuit board 120 is connected to the side of the laser generator 143 remote from the base plate 205 at intervals. The first circuit board 120 is electrically connected to the sensor pickup board of the laser module 100, for example, through the first circuit board 120. The first circuit board 120 can receive and process temperature signals, air pressure signals and flame status signals detected by the temperature sensor, air pressure sensor and flame sensor of the sensor detection board, thereby obtaining control signals for controlling the operation of the laser generator 143.

Optionally, the second circuit board 130 is connected to the side of the first circuit board 120 away from the bottom plate 205 at intervals, for example, by the aforementioned raised posts 111. The second circuit board 130 is electrically connected to the laser generator 143 and the first circuit board 120, and is capable of controlling light emission of the laser generator 143 according to a control signal. The electrical connection between the second circuit board 130 and the first circuit board 120 may be a board-to-board connector. The electrical connection between the second circuit board 130 and the laser generator 143 may be that a control signal line of the laser generator 143 is soldered to the second circuit board 130. Optionally, a power interface element may be further disposed on the second circuit board 130, for plugging a power cord to achieve power supply. The power interface member may be exposed on the top plate 104 (e.g. by providing a corresponding opening on the top plate 104) to facilitate insertion of a power cord for supplying power to each electrical structure (e.g. the first circuit board 120, the second circuit board 130, the laser generator 143, the heat dissipation fan 201, etc.).

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 instead of 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, which is not limited herein.

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

The light guide columns 121 indicate the power supply and light emission conditions of the light source in the laser generator 143, and in this embodiment, the number of the light guide columns 121 is two, when 24V voltage is provided to the light source, the power supply is normal, and one green light in the light guide columns 121 is lighted; when the laser module 100 emits light, another blue lamp in the light guide column 121 is turned on.

The annular shell 102 surrounds the first circuit board 120, the second circuit board 130 and 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 housing 102 collectively serve as the housing of the laser module 100. Optionally, a partial area of the annular housing 102 corresponding to the exit of the laser is provided as a viewing window 101 for viewing the laser light emission and reducing the impact of the laser light on the observer's eye. In this embodiment, the observation window 101 is disposed at a position corresponding to the outlet of the nozzle 204, and the user can observe the laser light emitting state through the eye-protecting observation window 101. The observation window 101 can be made of known special eye protection materials for laser, so that the user can be prevented from being damaged by too strong light when observing the laser.

Referring to fig. 5 to 7, the laser module 100 further includes a sensor detecting plate 301, a heat conducting ring 302, a first lens 303, a rubber gasket 304, and a lens pressing ring 305.

The first lens 303 is used as a lens to be detected, and is disposed on a light path of the laser, for example, to protect a light emitting position of the laser generator 143 and prevent external contaminants (such as dust and splashes during laser processing) from damaging the laser generator 143. In other embodiments, the first lens 303 may also be an internal lens of the laser generator 143, for example, a constituent lens in an optical lens group of the laser generator 143, where the sensor detection board 301 may be used to detect a parameter (such as temperature) inside the laser generator 143. In addition, in the present embodiment, the temperature of the first lens 303 is detected, and the detected temperature or temperature rise of the first lens 303 is used to determine the contamination or damage degree of the first lens 303, so as to control the light output of the laser generator 143. For example, when the temperature or the temperature rise of the first lens 303 is detected to exceed the allowable range, it is determined that the first lens 303 is contaminated or damaged to a high degree, and at this time, the laser generator 143 is not allowed to emit light to avoid degradation of the light emission quality of the laser generator 143 or damage to the constituent members of the laser module 100 at a high temperature. This protection function is particularly important when the laser power of the laser generator 143 is large, so that the potential safety hazard caused by the increase of the laser power can be reduced. The specific structure or material of the first lens 303 may be set as desired, for example, a quartz flat window lens.

Specifically, a rubber ring 304 is provided between the first lens 303 and the lens pressing ring 305 for cushioning and sealing the first lens 303. The temperature of the first lens 303 is transmitted to the thermistor of the sensor detection plate 301 through the heat conducting ring 302, the temperature change of the first lens 303 is obtained through the temperature change of the thermistor, and then the smudge degree of the first lens 303 is judged according to the temperature change of the first lens 303: the more dirty the first lens 303 is, the faster the temperature of the thermistor rises when the laser module 100 emits light.

The heat conducting ring 302 is internally provided with a groove 302A, heat conducting glue is filled in the groove 302A, and after the heat conducting ring 302 is normally installed, the heat conducting glue in the groove 302A wraps the thermistor on the sensor detection small plate 301, so that good heat conduction is ensured.

The lens pressing ring 305 is externally threaded, is screwed onto the module base plate 205 from below, and presses the first lens 303 onto the heat conducting ring 302 through the rubber ring 304; meanwhile, two small grooves 305A are formed in one side below the lens pressing ring 305, so that the lens pressing ring is convenient to install or remove by using tools; the first lens 303 can be removed from under the module base 205 by the lens press ring 305 while cleaning or replacing the first lens 303.

The sensor pickup board 301 may be a printed circuit board or other form of circuit board. In this embodiment, the sensor detection plate 301 is provided with a temperature sensor, an air pressure sensor, and a flame sensor on a side remote 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 a region located outside the first via K3 on one side surface of the sensor detection plate 301. The region of the side plate surface of the sensor detection plate 301 located outside the first via hole K3 may be an annular region or a region of another shape concentric with the first via hole K3 on the side plate surface (illustrated as a side plate surface away from the laser generator 143) of the sensor detection plate 301. In this embodiment, the temperature sensor may be a thermistor or other form, and only needs to be able to collect the temperature information of the first lens 303. The temperature information may be directly processed or preprocessed on the sensor detection board 301, or may be transmitted to other processing units of the laser module 100 (for example, a portion of the second circuit board 120 for data processing), which is not limited herein.

Fig. 6 is an exploded view of a further part of the structure of the laser module according to the embodiment of the present application. The sensor detecting board 301 is provided with a first flame sensor 310 and a second flame sensor 311, the first flame sensor 310 and the second flame sensor 311 are both used for detecting the flame in real time in the area near the nozzle 204, and when one or both of the first flame sensor 310 and the second flame sensor 311 detect the flame, the flame sensor detecting the flame gives an alarm, and the laser module 100 stops the light emitting work.

Referring to fig. 6, a flame detection window 213 is formed in a region of the base plate 205 facing the first flame sensor 310 and the second flame sensor 311, and an infrared filter 213A is attached to a side of the flame detection window 213 away from the flame sensors. The infrared filter 213A can filter non-infrared light waves, and can prevent interference of laser emission and other indoor light to the first flame sensor 310 and the second flame sensor 311, and prevent external dust from entering the laser module 100, so as to cause dust accumulation in circuits and devices inside the laser module 100.

It should be noted that, the holes on the optical path of the laser beam emitted by the laser generator 143 are all coaxially disposed, and of course, in other embodiments, if there are additional optical elements (such as a mirror, a refractive mirror, etc.) on the optical path of the laser beam to change the direction of the optical path of the laser beam, the holes on the optical path of the laser beam may be different.

As shown in fig. 8, taking as an example that the side of the sensor detection plate 301 remote from the laser generator 143 is provided with temperature sensors, the temperature sensors are four in total, and the four

temperature sensors

306, 307, 308, and 309 are uniformly distributed circumferentially around the first via hole K3. Of course, the number of the temperature sensors can be one or other numbers, and the distribution mode can be circumferentially uniform distribution or nonuniform distribution; the distances of the plurality of temperature sensors from the first via K3 may be equal or unequal, and when unequal, the temperatures detected by the plurality of sensors may be indicative of temperature conditions at different distances of the first lens 303 from the center of the first via K3.

In this embodiment, the temperature sensor may be an analog sensor, a digital sensor, or another type of sensor.

The present embodiment adopts an indirect thermal coupling form, as shown in fig. 5 to 8, the heat conducting ring 302 is annular and has a second via K4, and the second via K4 corresponds to the first via K3 and is used for allowing laser light to pass through. The thermally conductive ring 302 is thermally coupled (either in direct contact or not) on one side to a temperature sensor and on the other side to the first lens 303 (either in direct contact or not). Optionally, one side of the heat conducting ring 302 is glued to the sensor detecting board 301 and covers at least the area where the temperature sensor is located, and the other side of the heat conducting ring is glued to the first lens 303 (the other side of the heat conducting ring is not glued to the first lens 303 (the first lens 303 is easy to be removed when it needs to be cleaned or replaced, of course, the heat conducting ring 302 may also be provided by a manner that two sides of the heat conducting ring are glued or both sides of the heat conducting ring are not glued.

Of course, in other embodiments, the thermally conductive ring 302 (other forms than thermally conductive silicone may be used and is not limited to solid, colloidal, liquid, or a combination thereof).

In an alternative embodiment, the rubber gasket 303 is accommodated in the first through hole K1, and one side of the rubber gasket 303 abuts against the hole bottom surface of the first through hole K1, and the other side elastically presses the first lens 303 against the sensor detection plate 301. In the assembled state, the rubber gasket 303 may be in a compressed state to a degree to resiliently compress the first lens 303 against the sensor detection plate 301 or the intermediate thermally conductive ring 302. The rubber gasket 303 may also serve as a buffer protection for the first lens 303.

The sensor detection plate 301 in some embodiments of the present embodiment adopts a direct or indirect contact lens smudge detection scheme, and has the advantages of low cost, small volume, simple production and assembly, and the like. In the process of the laser module 100 emitting light, smoke dust generated when materials such as wood boards are cut is accumulated on the surface of the protective lens after long-time use, and the loss of dirty objects to the laser light emitted when the laser emits light is converted into heat energy, so that the temperature of the lens is increased. When the temperature or the temperature rise abnormality of the lens is detected (for example, the temperature rise is set to be more than 0.15 ℃/S), the first lens 303 is judged to be dirty to exceed the allowable value, the turn-off of the light emission is timely indicated, the alarm information is fed back, the user is prompted to clean or replace the lens, irreversible damage such as lens splitting and the like caused by the dirty lens is avoided, and the light emission processing effect of the laser module 100 is ensured.

Referring to fig. 9, the bottom plate 205 is provided with an air flow channel F3; the annular shell 102 is provided with a diversion pipeline F4 along the axial direction of the annular shell, one end of the diversion pipeline F4 is correspondingly communicated with the airflow channel F3, and the other end of the diversion pipeline F is used for being connected to an air source; the nozzle 204 is connected to a side of the bottom plate 205 away from the laser generator 143, and the shaft hole K2 corresponds to and communicates with the first through hole K1 and the air flow channel F3, for allowing laser to emit and allowing laser cutting auxiliary gas to emit. As can be seen from fig. 8, the air flow channel F3 is a second through hole penetrating the bottom plate, and the second through hole is spaced from the first through hole K1.

Specifically, as shown in the dashed line of fig. 9, the laser cutting auxiliary gas is introduced into the gas inlet 106 through the rubber hose, is led to the bottom plate 205 through the guide pipe F4, and is ejected from the nozzle 204 through the gas flow channel F3 of the bottom plate 205.

Referring to fig. 9, the bottom plate 205 is provided with a gas pressure detecting hole 210, and the gas pressure detecting hole 210 is communicated with the gas flow channel F3 for detecting the gas flow temperature of the auxiliary gas.

In addition, the bottom plate 205 is further provided with a sealing ring 211, the sealing ring 211 is attached to the bottom plate 205, the shape of a through hole formed in the sealing ring 211 is matched with the first through hole K1 and the second through hole, and the sealing ring 211 is used for enhancing the air tightness of the laser module 100 and preventing dust in air from entering the laser module 100.

In some embodiments, the laser module 100 further includes a temperature sensor disposed in the flow guiding tube F4 for detecting the temperature in the flow guiding tube F4.

Fig. 10 is a schematic diagram of an operation mode of a laser module according to an embodiment of the present application. As shown in fig. 10, the laser module 100 further includes a module microcontroller, and the temperature sensor includes a first thermistor PTC-a and a second thermistor PTC-b, where the first thermistor PTC-a is disposed in the flow guiding pipe F4, and the second thermistor PTC-b is disposed in a preset auxiliary cavity, and the auxiliary cavity is in communication with the air outside; the module microcontroller is used for receiving the first temperature change in the diversion pipeline F4 detected by the first thermistor PTC-a and the second temperature change in the auxiliary cavity detected by the second thermistor PTC-b, and calculating the flow of auxiliary gas in the diversion pipeline F4 according to the first temperature change and the second temperature change.

For ease of understanding, the following describes how the module microcontroller calculates the flow of the assist gas in the flow conduit F4: the voltage of the power supply A is higher than that of the power supply B; the voltage of the power supply A is used for rapidly heating the PTC-a thermistor; the voltage of the power supply B is lower and is used for ADC detection after the PTC-a thermistor is heated; only one power is turned on at the same time, and the time of each power is determined by a module microcontroller program; the switching circuit S can be a relay, a triode or a MOS tube circuit and the like, and the working principle is as follows: the thermistors PTC-a and PTC-b are PTC thermistors, the resistance value rises after the temperature rises, the change of the voltage occupied by the thermistors is detected by the ADC, and the corresponding temperature change can be calculated after conversion; meanwhile, the positive temperature characteristic of the PTC can prevent the device from being burnt out due to overlarge current in the heating process; PTC-a is placed on the diversion pipeline F4, and the air auxiliary flow is judged by calculating the cooling speed just after heating each time; the cooling speed is high when the air flow is large, and the cooling speed is low when the air flow is small; the PTC-b is used for reference, is placed in a preset auxiliary cavity, and air is communicated with the auxiliary cavity but does not flow, and is synchronously detected and compared with parameters of the PTC-a to remove the influence of air temperature on the cooling speed of the PTC-a.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application.

Claims

1. A heat dissipation assembly for dispel the heat to laser module, laser module includes laser generator and observation window, the observation window is used for observing the laser condition of light-emitting, its characterized in that, heat dissipation assembly includes: 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 part, and the heat dissipation fan is arranged on the side plate; the first guide part is arranged in a region, located outside the cooling fan, of the side plate, and defines a first cooling flow channel penetrating 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 comprises a first through hole and a second guide part, wherein the first through hole is used for allowing laser emitted by the laser generator to pass through; the second guide part corresponds to and is communicated with the first guide part, a second heat dissipation flow passage penetrating along a second direction is limited, and a preset included angle is formed between the second direction and the first direction;

the heat radiation fan can operate to form a first heat radiation airflow passing through the first heat radiation flow channel and the second heat radiation flow channel, and the first heat radiation airflow passes through the second heat radiation flow channel and then is blown to the observation window.

2. The heat dissipating assembly of claim 1, wherein said side plates comprise a first side plate and a second side plate, said first side plate comprising a first side wall, a second side wall extending along an end of said first side wall in a direction toward said laser generator; the second side plate comprises a third side wall and a fourth side wall which is bent and extended along the tail end of the third side wall towards the direction close to the laser generator, the first side wall and the third side wall are oppositely arranged, and the second side wall and the fourth side wall are oppositely arranged;

the first side wall, the second side wall, the third side wall, the fourth side wall and the second heat dissipation structure are arranged together to form an accommodating space in a surrounding mode, and the laser generator is arranged in the accommodating space;

the first side wall and the third side wall are both provided with the cooling fan, and the observation window is arranged on one side, far away from the laser generator, of the second guide part and is positioned on the same side as the second side wall.

3. The heat dissipating assembly of claim 2, wherein said laser module further comprises a circuit board and an annular housing, said circuit board being disposed on a side of said side plate remote from said second heat dissipating structure; the annular shell surrounds the 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 laser outlet, and an air outlet is formed in a partial area of the annular shell corresponding to the circuit board;

the first heat dissipation structure further comprises a third guide part, and the third guide part defines a third heat dissipation flow passage communicated along a light emitting direction parallel to the laser generator;

the heat dissipation fan can operate to form second heat dissipation airflow passing through the third heat dissipation flow channel and the air outlet, and the second heat dissipation airflow is blown to the circuit board after passing through the third heat dissipation flow channel.

4. A heat dissipating assembly according to any one of claims 1 to 3, wherein said first guide is a heat dissipating fin, and said heat dissipating fan is spaced a predetermined distance from said heat dissipating fin.

5. The heat dissipating assembly of claim 1, wherein said second heat dissipating structure is a base plate having oppositely disposed first and second faces, said first face being adapted for mating connection to said laser generator;

the first through hole is recessed from the first plate surface and penetrates through the second plate surface.

6. The heat dissipating assembly of claim 5 wherein said laser module further comprises a nozzle having an axial bore, said nozzle being connected to said second plate surface and said axial bore corresponding to and communicating with said first through bore for permitting laser emission and permitting laser cutting assist gas emission;

and after the first radiating airflow is blown to the observation window, the first radiating airflow is reversely blown to the nozzle under the blocking of the observation window.

7. The heat dissipating assembly of claim 5, wherein said second guiding portion is an oblique air guiding fin penetrating said bottom plate, said oblique air guiding fin comprising a plurality of spaced apart blades, said blades being inclined in a direction toward said viewing window.

8. A laser module, comprising:

a laser generator for emitting laser;

the observation window is used for observing the laser light-emitting condition;

the heat dissipating assembly of any one of claims 1 to 7, wherein the heat dissipating fan of the heat dissipating assembly is operable to cool the laser generator and blow a heat dissipating air stream toward the viewing window;

the circuit board is connected to one side of the first heat dissipation structure of the heat dissipation assembly, which is far away from the second heat dissipation structure of the heat dissipation assembly;

the top plate is indirectly connected to one side, far away from the second heat dissipation structure, of the circuit board;

the annular shell is surrounded on the periphery of the circuit board and the periphery of the heat dissipation assembly, and one end opening of the annular shell is covered by the top plate.

9. The laser module of claim 8, wherein the second heat dissipating structure of the heat dissipating assembly is a bottom plate, and the opening at the other end of the annular housing 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 allowing the laser to pass through; the bottom plate is provided with an airflow channel;

the annular shell is provided with a diversion pipeline along the axial direction of the annular shell, one end of the diversion pipeline is correspondingly communicated with the airflow channel, and the other end of the diversion pipeline is used for being connected to an air source;

the laser module further comprises a nozzle, the nozzle is provided with a shaft hole, the nozzle is connected to one side, far away from the laser generator, of the bottom plate, and the shaft hole corresponds to and is communicated with the first through hole and the air flow channel, and the nozzle is used for allowing laser to emit and allowing laser cutting auxiliary gas to emit.

10. The laser module of claim 9, wherein the air flow channel is a second through hole extending through the base plate, the second through hole being spaced apart from the first through hole.

11. The laser module of claim 9, further comprising a temperature sensor disposed within the flow conduit for detecting a temperature within the flow conduit.

12. The laser module of claim 11, further comprising a module microcontroller, wherein the temperature sensor comprises a first thermistor and a second thermistor, wherein the first thermistor is arranged in the flow guide pipeline, the second thermistor is arranged in a preset auxiliary cavity, and the auxiliary cavity is communicated with the outside air;

the module microcontroller is used for receiving the first temperature change in the diversion pipeline detected by the first thermistor and the second temperature change in the auxiliary cavity detected by the second thermistor, and calculating the flow of the auxiliary gas according to the first temperature change and the second temperature change.