Design method of heat dissipation device, heat dissipation device and related equipment

Abstract

The invention relates to the technical field of 3D printing, in particular to a design method of a heat dissipation device, the heat dissipation device and related equipment. The method comprises the following steps: determining a design scheme of the heat dissipation device to be configured in the 3D printer; wherein the heat dissipation device comprises a heat dissipation device and a flow guide cover with a bent part, and the flow guide cover is used for conveying cold air sucked from the outside of a machine body of the 3D printer to the heat dissipation device; the design scheme comprises shape data of the fairing; according to the shape data, a plurality of area ratios are obtained by determining the ratio of the area of the cross section where each sampling point located in the cold air flowing direction in the air guide sleeve to the area of the air outlet of the air guide sleeve; wherein the section where the sampling point is located is perpendicular to the cold air flowing direction at the sampling point; if the plurality of area ratios are within the target value range, determining that the design scheme is qualified; the technical problem that the heat dissipation efficiency of a heat dissipation method in the prior art is very low can be solved.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a design method for a heat dissipation device, a heat dissipation device, and related equipment. Background Art

[0002] In the existing technology, a light-curing 3D printer uses an ultraviolet light source to irradiate liquid photosensitive resin, causing the liquid photosensitive resin to quickly solidify to achieve 3D printing. Since the ultraviolet light source used in the light-curing 3D printer generates a large amount of heat during operation, it is necessary to dissipate heat inside the light-curing 3D printer in a timely manner.

[0003] In actual operation, a fan is usually installed inside the light-curing 3D printer and a ventilation window is opened on the outside of the printer casing. The rotation of the fan then transports the heat inside the body of the light-curing 3D printer through the ventilation window to the outside of the body of the light-curing 3D printer, thereby achieving heat dissipation.

[0004] In actual applications, although the above heat dissipation method can dissipate heat inside the body of the light-curing 3D printer, the heat dissipation efficiency is very low, and ultimately the heat inside the body will seriously affect the printing quality of the light-curing 3D printer. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a design method for a heat dissipation device, a heat dissipation device and related equipment to solve the technical problem of very low heat dissipation efficiency of the heat dissipation method in the prior art.

[0006] In a first aspect, the present application provides a method for designing a heat dissipation device, the method comprising:

[0007] Determine the design of the heat dissipation device to be configured in the 3D printer;

[0008] The heat dissipation device includes a radiator and a shroud having a curved portion, wherein the shroud is used to transport cold air drawn in from outside the 3D printer to the radiator; the design solution includes shape data of the shroud;

[0009] Determine, based on the shape data, a ratio of the area of a cross section of each sampling point in the air deflector located in the cold air flow direction to the area of the air outlet of the air deflector to obtain a plurality of area ratios;

[0010] Wherein, the cross section where the sampling point is located is perpendicular to the flow direction of the cold air at the sampling point;

[0011] If a plurality of the area ratios are within the target value range, the design solution is determined to be qualified.

[0012] In a second aspect, the present application provides a heat dissipation device, which is manufactured according to the above-mentioned design method; the device includes: a water-cooling heat dissipation structure and an air-cooling heat dissipation structure;

[0013] The water-cooling heat dissipation structure is used to discharge the heat absorbed by the heat exchange medium in the body of the 3D printer during the circulation of the heat exchange medium inside the body of the 3D printer to the outside of the body of the 3D printer;

[0014] The air-cooling heat dissipation structure is used to transport the cold air sucked from the outside of the body to the water-cooling heat dissipation structure through the air guide cover with a curved portion in the air-cooling heat dissipation structure, so as to increase the heat discharge speed of the water-cooling heat dissipation structure.

[0015] In a third aspect, the present application provides an electronic device, which includes a processor and a memory, wherein the memory is used to store an application program, and the processor runs or executes a software program stored in the memory to enable the electronic device to implement the design method of the heat dissipation device as described above.

[0016] In a fourth aspect, the present application provides a computer-readable storage medium, which is used to store program codes executed by a processor, and the program codes are used to implement the above-mentioned design method of the heat dissipation device.

[0017] In a fifth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions are run on an electronic device, the electronic device implements the above-mentioned design method of the heat dissipation device.

[0018] Beneficial effects:

[0019] The present application provides a method for designing a heat dissipation device, the method comprising: determining a design scheme for a heat dissipation device to be configured in a 3D printer; wherein the heat dissipation device comprises a radiator and a shroud having a curved portion, the shroud being used to transport cold air drawn in from outside the 3D printer to the radiator; the design scheme comprising shape data of the shroud; determining, based on the shape data, a ratio of the area of a cross section at each sampling point in the shroud located in the direction of cold air flow to the area of an air outlet of the shroud to obtain a plurality of area ratios; wherein the cross section at the sampling point is perpendicular to the direction of cold air flow at the sampling point; and determining the design scheme as qualified if the plurality of area ratios are within a target value range;

[0020] In summary, the design method of the heat dissipation device provided in the present application can be used to design a heat dissipation device including a shroud and a radiator for a 3D printing device, and the designed shroud can work in conjunction with the radiator. More importantly, the design method provided in the present application can evaluate the shroud by area ratio to select the optimal shroud to work in conjunction with the radiator, thereby providing the highest heat dissipation efficiency for the 3D printing device, thereby effectively extending the service life of the 3D printing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. 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 relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of a flow chart of a method for designing a heat dissipation device according to an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of the air guide cover in the fluid dynamics simulation analysis test provided in the embodiment of the present application;

[0024] Figure 3 A first schematic diagram of the flow direction of cold air in the air duct in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0025] Figure 4 A second schematic diagram of the flow direction of cold air in the air duct in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram showing the changing trends of three groups of area ratios in a fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0027] FIG6( a ) is a schematic diagram of viscous resistance and velocity distribution corresponding to the first numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0028] FIG6( b ) is a schematic diagram of viscous resistance and velocity distribution corresponding to the second numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0029] FIG6( c ) is a schematic diagram of viscous resistance and velocity distribution corresponding to the third numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0030] Figure 7Schematic diagram of the work done by unit volume of air viscous resistance in the fluid dynamics simulation analysis test provided in the embodiment of the present application;

[0031] FIG8( a ) is a fluid simulation velocity distribution diagram corresponding to the first numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0032] FIG8( b ) is a fluid simulation velocity distribution diagram corresponding to the second numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0033] FIG8( c ) is a schematic diagram of viscous resistance and velocity distribution corresponding to the third numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application;

[0034] Figure 9 A design drawing of the air duct provided in an embodiment of the present application;

[0035] Figure 10 A schematic diagram of the structure of a heat dissipation device installed in a 3D printer provided in an embodiment of the present application, viewed from a top view;

[0036] Figure 11 A schematic diagram of the structure of a heat dissipation device installed in a 3D printer provided in an embodiment of the present application, viewed from an upward angle;

[0037] Figure 12 An exploded schematic diagram of a top view of a heat dissipation device installed in a 3D printer according to an embodiment of the present application;

[0038] Figure 13 An exploded diagram of a heat dissipation device installed in a 3D printer provided in an embodiment of the present application, viewed from above. DETAILED DESCRIPTION

[0039] In the prior art, during the printing process of a light-curing 3D printer, the ultraviolet light source used in the light-curing 3D printer generates a large amount of heat during continuous operation, which causes the temperature inside the light-curing 3D printer to rise sharply, even as high as hundreds of degrees Celsius. Therefore, in order to improve the stability of the printing process of the light-curing 3D printer, it is necessary to dissipate heat inside the 3D printer in a timely manner.

[0040] In actual operation, due to the limitations of the volume and materials of the body structure of the light-curing 3D printer, technicians usually tend to only install a fan inside the light-curing 3D printer and open a ventilation window on the outside of the printer casing when solving the heat dissipation problem for the light-curing 3D printer. The heat inside the body of the light-curing 3D printer is then transported to the outside of the body of the light-curing 3D printer through the ventilation window by the rotation of the fan to achieve heat dissipation.

[0041] In actual applications, although the above heat dissipation method can dissipate heat inside the body of the light-curing 3D printer, the heat dissipation efficiency is very low, and ultimately the heat inside the body will seriously affect the printing quality of the light-curing 3D printer.

[0042] To solve the above-mentioned technical problems, the present application provides a design solution for a heat dissipation device. To make the purpose, technical solution, and advantages of the embodiments of the present application more clear, the technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] First, this application provides a design method for a heat dissipation device, such as Figure 1 As shown, Figure 1 A schematic flow chart of a method for designing a heat dissipation device according to an embodiment of the present application, the method comprising:

[0044] S110~S130, details are as follows:

[0045] S110: Determine a design scheme for a heat dissipation device to be configured in the 3D printer.

[0046] The heat dissipation device includes a radiator and a shroud having a curved portion, the shroud being used to transport cold air drawn in from outside the 3D printer body to the radiator; and the design solution includes shape data of the shroud.

[0047] Specifically, in the embodiment of the present application, the 3D printer may be a 3D printer that applies different 3D printing technologies, which at least includes a light-curing 3D printer; the heat dissipation device is a device that needs to be configured / installed in the 3D printer and is used to transport heat inside the 3D printer to the outside of the 3D printer; the design plan generally includes the structural parameters of each structure included in the heat dissipation device, the material parameters of each structure, and the installation position of each structure.

[0048] In the embodiment of the present application, in order to improve the heat dissipation efficiency, two heat dissipation structures are provided in the heat dissipation device, namely a water-cooled heat dissipation structure and an air-cooled heat dissipation structure. However, the above two heat dissipation structures do not work separately, that is, they are not both responsible for transporting the heat inside the body of the 3D printer to the outside of the body of the 3D printer. Because whether it is a water-cooled heat dissipation structure or an air-cooled heat dissipation structure, the heat dissipation principle is to transport the heat inside the body of the 3D printer to the outside of the body of the 3D printer. If the water-cooled heat dissipation structure and the air-cooled heat dissipation structure work separately, it is very likely to form a "heat dissipation island", resulting in the interruption of the heat transfer path. For example, after the water-cooled heat dissipation structure concentrates the heat to the radiator, if the air-cooled heat dissipation structure does not simultaneously strengthen the airflow near the radiator, the heat dissipation efficiency of the radiator will be greatly reduced, resulting in secondary heat accumulation.

[0049] In order to prevent the occurrence of "heat dissipation islands", the present application designs the water-cooling heat dissipation structure and the air-cooling heat dissipation structure in the heat dissipation device to work in a coordinated manner; the water-cooling heat dissipation structure is used to discharge the heat absorbed from the body of the 3D printer during the circulation of the heat exchange medium inside the body of the 3D printer to the outside of the body of the 3D printer; the air-cooling heat dissipation structure is used to transport the cold air sucked from the outside of the body to the water-cooling heat dissipation structure through the air guide cover with a curved portion in the air-cooling heat dissipation structure.

[0050] The working principle of the above-mentioned "cooperative work" is that if the air outlet of the air-cooled heat dissipation structure is designed to blow towards the radiator in the water-cooled heat dissipation structure, it can not only realize the original function of the air-cooled heat dissipation structure to take away the internal heat of the body through cold air, but also accelerate the heat exchange between the radiator and the outside of the body in the process of blowing through the air outlet to the radiator, and play an additional function of improving the heat dissipation efficiency of the radiator. Therefore, the "cooperative work" of the above-mentioned water-cooled heat dissipation structure and the air-cooled heat dissipation structure is equivalent to playing the role of "1+1>2".

[0051] The air duct in the air-cooled heat dissipation structure is a shell designed based on a specific shape and used to transport cold air sucked from the outside of the 3D printer body to the radiator. The "air duct with a curved portion" means that the overall shape of the air duct is curved, that is, the gas flow direction of the cold air in the air duct is turned. In actual applications, the air duct is set to be curved, which can increase the heat exchange area between the cold air inhaled from the outside of the body in the air duct and the hot air inside the body, thereby improving the heat exchange efficiency.

[0052] The radiator (or water-cooled row) in the water-cooled heat dissipation structure is the core heat exchange component. Its function is to efficiently transfer the heat absorbed by the liquid heat exchange medium circulating in the water-cooled heat dissipation structure during the circulation process to the outside of the body.

[0053] In practical applications, the water-cooling heat dissipation structure and the air-cooling heat dissipation structure may further specifically include other component structures, as long as the component structures can achieve "water-cooling heat dissipation" and "air-cooling heat dissipation" after being combined.

[0054] In the embodiment of the present application, although the design scheme of the heat dissipation device has a lot of contents that can be optimized and adjusted, the embodiment of the present application focuses on optimizing and adjusting the shape of the air deflector; wherein, the shape data of the air deflector can clearly indicate the shape of the air deflector, and the shape data can be a data set including the circumference of the air inlet of the air deflector, the circumference of the air outlet, the length and / or curvature of the air deflector in the direction of cold air flow, etc., which can be used to specify the unique shape of the air deflector after combination.

[0055] In one implementation, S110 includes steps (1) to (2), as detailed below:

[0056] Step (1): Determine the structural feature data inside the body of the 3D printer.

[0057] The structural characteristic data indicates the internal spatial structure of the body.

[0058] Specifically, the process of acquiring structural feature data requires comprehensive and accurate information about the internal structure of the 3D printer body. This involves employing appropriate measurement, scanning, or modeling techniques to collect detailed data on the shape, size, positional relationships, and other characteristics of each component within the 3D printer body. This structural feature data accurately reflects the internal spatial structure of the body, including but not limited to the shape and wall thickness of the internal cavity, and the position and form of support structures. Acquiring this data provides a solid foundation for subsequent design work, ensuring that the design fully considers the actual internal structural conditions of the body and avoids design conflicts or mismatches.

[0059] Step (2): Determine the design scheme based on the structural feature data.

[0060] Specifically, in actual operation, after determining the structural characteristic data inside the 3D printer body, it is necessary to comprehensively consider multiple factors such as the internal space limitations, structural strength requirements, functional requirements, etc. of the body, and carry out layout planning, shape optimization, material selection and other design work for the water-cooling heat dissipation structure and air-cooling heat dissipation structure of the heat dissipation device.

[0061] S120: Determine, based on the shape data, a ratio of the area of a cross section of each sampling point in the cold air flow direction in the air deflector to the area of the air outlet of the air deflector to obtain a plurality of area ratios.

[0062] The cross section where the sampling point is located is perpendicular to the flow direction of the cold air at the sampling point.

[0063] Specifically, in the embodiment of the present application, since the shape of the air deflector can be uniquely determined based on the shape data of the air deflector, once the shape data of the air deflector is determined, the cross-sectional area of each sampling point in the air deflector located in the direction of cold air flow can be determined based on the shape data.

[0064] Among them, the position of the sampling point can be determined according to actual needs. In actual operation, it is necessary to first determine the flow direction of the cold air in the air deflector according to the shape of the air deflector. After the flow direction of the cold air is determined, the flow direction of the cold air is represented by a curve, and then a sampling point is determined at each unit distance in the curve; in geometry, there are multiple geometric surfaces passing through a sampling point. In the embodiment of the present application, the "section where the sampling point is located" should be the section that is vertically penetrated by the cold air along the flow direction of the cold air in the air deflector, that is, "the section where the sampling point is located is perpendicular to the flow direction of the cold air at the sampling point".

[0065] When the cross-sectional area of each sampling point in the air deflector located in the direction of cold air flow is calculated, the ratio of the cross-sectional area corresponding to each sampling point to the area of the air outlet of the air deflector is calculated respectively until multiple area ratios are obtained; wherein, there is a one-to-one correspondence between the multiple sampling points and the multiple area ratios.

[0066] In one implementation, after S120, the method further includes: steps (3) to (4), the details of which are as follows:

[0067] Step (3): If a preset number of area ratios among the multiple area ratios are not within the target preset range, the shape data of the air guide cover in the design scheme is updated.

[0068] Specifically, in the embodiment of the present application, the value of the preset number can be determined according to actual needs, and the present application does not make any specific restrictions on this; in actual operation, the preset number can be set to 1, that is, as long as there is one area ratio that is not within the target preset range, the air duct needs to be reset, that is, the shape data of the air duct needs to be updated to ensure that the designed air duct can dissipate heat efficiently.

[0069] In actual operation, if the preset number of area ratios exceeds the target numerical range, the cross-sectional area of the air deflector excluding the air inlet and air outlet should be reduced; if the preset number of area ratios is less than the target numerical range, the cross-sectional area of the air deflector excluding the air inlet and air outlet should be increased.

[0070] Step (4): Based on the updated shape data, re-execute the step of determining the ratio of the cross-sectional area of each sampling point in the air duct located in the cold air flow direction to the area of the air outlet of the air duct based on the shape data to obtain multiple area ratios.

[0071] Specifically, in actual operation, after the shape data of the air deflector is updated, S120 may be re-executed to determine whether the multiple area ratios corresponding to the updated air deflector are within a preset target value range.

[0072] S130: If the multiple area ratios are within the target value range, the design solution is determined to be qualified.

[0073] Specifically, in the embodiment of the present application, the target numerical range is used to screen the air duct, and the design scheme is determined to be qualified only when the calculated multiple area ratios are all within the target numerical range; wherein, the meaning of "qualified" is that a heat dissipation device including an air duct can be manufactured according to the design scheme, and when the heat dissipation device is manufactured, it can be configured / installed in a 3D printer.

[0074] In one implementation, before S130, the method further includes: steps (5) to (8), the details of which are as follows:

[0075] Step (5): Determine multiple candidate value ranges.

[0076] Specifically, in the embodiment of the present application, in order to ensure that the obtained shape can effectively improve the heat dissipation efficiency of the air duct, it is necessary to determine an accurate target numerical range to ensure that the air duct selected by the target numerical range has the effect of improving the heat dissipation efficiency.

[0077] In actual operation, it is first necessary to determine multiple candidate numerical ranges; wherein, the multiple candidate numerical ranges may not interfere with each other, or may have overlapping numerical ranges.

[0078] Step (6): Determine multiple groups of area ratios based on multiple candidate value ranges.

[0079] Among them, each candidate numerical range corresponds to at least one group of area ratios; each group of area ratios includes multiple area ratios; and a group of area ratios corresponding to the candidate numerical range are all within the candidate numerical range.

[0080] Specifically, in an embodiment of the present application, after determining multiple candidate numerical ranges, multiple groups of area ratios can be determined based on the multiple candidate numerical ranges; wherein each candidate numerical range corresponds to at least one group of area ratios, and each group of area ratios includes multiple area ratios; "a group of area ratios corresponding to the candidate numerical range are all within the candidate numerical range" means a group of area ratios corresponding to a candidate numerical range, and the multiple area ratios included therein are all within the candidate numerical range.

[0081] In actual operation, because the candidate numerical range is a range, but a set of area ratios is a sequence, as long as the area ratios in the sequence are all within the corresponding candidate numerical range, the area ratios in the sequence can be changed arbitrarily. Even when the arrangement order of multiple area ratios in a set of area ratios is disrupted and rearranged, a new set of area ratios can be obtained.

[0082] Step (7): Based on multiple groups of area ratios, a simulated air guide cover is constructed to conduct a heat dissipation efficiency test to determine the heat dissipation efficiency corresponding to each candidate value range.

[0083] Specifically, in an embodiment of the present application, after determining multiple sets of area ratios, a simulated air duct can be constructed to conduct a heat dissipation efficiency test; wherein, the "simulated air duct" is a air duct obtained by simulation based on multiple sets of area ratios; the "construction" process can be spatial modeling; the heat dissipation efficiency test can be an online simulation test, such as a fluid dynamics simulation analysis test.

[0084] Step (8): Determine the candidate value range corresponding to the simulated air duct with the maximum heat dissipation efficiency as the target value range.

[0085] Specifically, for example, Figure 2 、 Figure 3 and Figure 4 As shown, Figure 2 This is a schematic diagram of the structure of the shroud in the fluid dynamics simulation analysis test provided in the embodiment of the present application. Figure 3 This is a first schematic diagram of the flow direction of cold air in the air guide cover in the fluid dynamics simulation analysis test provided in the embodiment of the present application. Figure 4 This is a second schematic diagram of the flow direction of cold air in the air guide cover in the fluid dynamics simulation analysis test provided in an embodiment of the present application. Figure 2 a, b, h and l in the figure represent the size of the air deflector, and their specific values can be determined according to actual needs. Figure 3 The block diagram in Figure 2 A longitudinal section of the air deflector of the shape shown in FIG. Figure 4 is a longitudinal sectional view of a heat dissipation device including a shroud, Figure 3 and Figure 4 v in i and v0 respectively represent the speed of the cold air before entering the air inlet of the air deflector and after leaving the air outlet of the air deflector. The direction of the arrow is the direction of the cold air flow in the air deflector.

[0086] by Figure 2 and Figure 3Taking the air duct of the shape shown as an example, the fluid dynamics simulation analysis experiment is continued. Three candidate numerical ranges are first determined, the first one is (1, 1.5), the second one is (0.8, 1.2), and the third one is (0.5, 1). Then, three groups of area ratios are determined based on the three candidate numerical ranges; among them, the group of area ratios corresponding to the first numerical range (1, 1.5) gradually increases in the direction from the air inlet to the air outlet of the air duct; the group of area ratios corresponding to the second numerical range (0.8, 1.2) gradually maintains a relatively flat area ratio in the direction from the air inlet to the air outlet of the air duct; the group of area ratios corresponding to the third numerical range (0.5, 1) gradually decreases in the direction from the air inlet to the air outlet of the air duct, as shown in FIG. Figure 5 As shown, Figure 5 This is a schematic diagram of the changing trends of three groups of area ratios in the fluid dynamics simulation analysis test provided in the embodiment of the present application. Figure 4 Medium S i Indicates the area of the cross section where the sampling point is located, S0 indicates the area of the air outlet, l i Indicates the travel length of the cold air in the air duct.

[0087] After the three groups of area ratios are determined, three types of simulated air guide covers are determined according to the three groups of area ratios, and fluid dynamics simulation analysis tests are performed on the three simulated air guide covers respectively.

[0088] 1) During the fluid dynamics simulation analysis test, it is necessary to quote the Bernoulli equation for verification calculation. The mathematical expression of the Bernoulli equation is as follows:

[0089]

[0090] Where p represents the pressure at the sampling point in the fluid; ρ represents the fluid density; v represents the flow velocity of the fluid at the sampling point; g represents the acceleration due to gravity; h represents the height of the sampling point; and C represents a constant.

[0091] 2) Multiplying the Bernoulli equation by the fluid volume V reduces it to the energy conservation equation, as shown below:

[0092]

[0093] Where, pV=psl=Fl=E 压 , ρVgh=mgh=E 势 ;

[0094] Where, E 压 Indicates pressure energy; E 动 Indicates kinetic energy; E势 represents the gravitational potential energy, and the following formula can be obtained from the above:

[0095] E 压 +E 动 +E 势 =E1;

[0096] 3) In actual applications, the cooling air flowing through the shroud is not an ideal fluid and will experience energy loss due to viscous resistance. Therefore, the energy loss needs to be added, resulting in the following formula:

[0097] E 压 +E 动 +E 势 +E 损 =E2;

[0098] Among them, E 损 =fl, where f represents the viscous resistance and l represents the length moved during the work done by the viscous resistance, i.e. the moving length of the cold air in the air duct.

[0099] As shown in Figures 6(a), 6(b) and 6(c), Figure 6(a) is a schematic diagram of the viscous resistance and velocity distribution corresponding to the first numerical range in the fluid dynamics simulation analysis test provided in the embodiment of the present application, Figure 6(b) is a schematic diagram of the viscous resistance and velocity distribution corresponding to the second numerical range in the fluid dynamics simulation analysis test provided in the embodiment of the present application, and Figure 6(c) is a schematic diagram of the viscous resistance and velocity distribution corresponding to the third numerical range in the fluid dynamics simulation analysis test provided in the embodiment of the present application. The arrow indicates the wind direction of the cold wind, and the boundary line pointed by the arrow is the boundary. It can be seen from Figure 6(a), Figure 6(b) and Figure 6(c) that since the multiple area ratios included in a group of area ratios corresponding to the first numerical range (1, 1.5) are gradually increasing, and the multiple area ratios included in a group of area ratios corresponding to the third numerical range (0.5, 1) are gradually decreasing, turbulence will occur when the cold wind reaches the boundary, and the multiple area ratios included in a group of area ratios corresponding to the second numerical range (0.8, 1.2) are relatively flat, so laminar flow will be generated.

[0100] Each of Figures 6(a), 6(b), and 6(c) consists of two left and right graphs. The shapes of the boundaries reached by the cooling air in these two graphs are different. Therefore, whether the cooling air forms turbulent or laminar flow after reaching the boundary is not related to the shape of the boundary. 4) In practical applications, the viscous drag f can be expressed as the product of the viscous drag coefficient C1 and the velocity v, that is, f = C1v, as shown in the following example. Figure 7 As shown, Figure 7This is a schematic diagram of the work done by the viscous resistance of air per unit volume in the fluid dynamics simulation analysis test provided in the embodiment of the present application. Figure 7 dl in the equation represents the length of the infinitesimal element, v ij represents the speed at the sampling point, v (i+1)(j+1) represents the speed of the sampling point after it passes the infinitesimal length, and θ represents the angle at which the speed direction of the sampling point changes after it passes the infinitesimal length. From this, the following formula can be obtained:

[0101]

[0102] In practical applications, compared to a straight air guide cover, the air guide cover in the embodiment of the present application is curved, and its curvature is variable, which can be expressed as The variable curvature wind guide will also increase the work length of the viscous resistance to a certain extent. The original infinitesimal length dl and the variable curvature infinitesimal length dl i The relationship between them is as follows:

[0103]

[0104] In summary, if the cross-sectional area of the air duct changes within a unit volume, the viscous resistance will increase and the path for the viscous resistance to do work will become longer, thereby causing more energy loss.

[0105] As shown in Figures 8(a), 8(b) and 8(c), Figure 8(a) is a fluid simulation flow velocity distribution diagram corresponding to the first numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application, Figure 8(b) is a fluid simulation flow velocity distribution diagram corresponding to the second numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application, and Figure 8(c) is a schematic diagram of viscous resistance and velocity distribution corresponding to the third numerical range in the fluid dynamics simulation analysis test provided in an embodiment of the present application; wherein, each of Figures 8(a), 8(b) and 8(c) includes two left and right figures, and the flow direction of the cold air in the above two figures is different, the flow direction of the cold air on the left is stable, and the flow direction of the cold air on the right is chaotic. The embodiment of the present application is analyzed based on the schematic diagram of the stable cold air flow direction on the left.

[0106] According to the schematic diagrams on the left side of Figures 8(a), 8(b) and 8(c), when the inlet and outlet interface parameters are the same, the maximum steady-state air duct flow velocity corresponding to the first numerical range is 15.0 m / s, the maximum steady-state air duct flow velocity corresponding to the second numerical range is 16.5 m / s, and the maximum steady-state air duct flow velocity corresponding to the third numerical range is 14.7 m / s.

[0107] From the distribution of wind speed flow trajectories shown in Figures 8(a), 8(b), and 8(c), it can be seen that the air flow corresponding to the second numerical range is mostly laminar (the gas flow is less chaotic, and there are fewer collisions between the motion trajectories of gas molecules on the left and right sides of the air outlet), and the air flow corresponding to the first and third numerical ranges is partially turbulent (the gas flow is more chaotic, and there are more collisions between the motion trajectories of gas molecules on the left and right sides of the air outlet).

[0108] In summary, the guide cover that maintains approximately equal area ratio changes has a higher flow rate or flow characteristics than the guide cover whose area ratio gradually increases or decreases, that is, the numerical range corresponding to the second numerical range is the target numerical range.

[0109] In actual operation, if the target value range is determined to be (0.8, 1.2) and the shape of the deflector is designed as follows Figure 2 As shown, the length of the air inlet of the air deflector ranges from 200 to 250 mm, and the width ranges from 200 to 350 mm; the internal length of the air deflector ranges from 150 to 250 mm, and the width ranges from 200 to 500 mm; the air outlet length of the air deflector ranges from 500 to 600 mm, and the height ranges from 120 to 160 mm; the air duct length of the air deflector ranges from 500 to 600 mm; the cross-sectional variation coefficient of the air deflector duct α = S i / S0,S i represents the cross-sectional area of each sampling point along the cold air flow direction in the air deflector; S0 represents the area of the air outlet of the air deflector.

[0110] In the embodiments of this application, Figure 9 As shown, Figure 9 This is a design drawing of the air deflector provided in the embodiment of the present application. Figure 9 The one on the left is a funnel-shaped fairing. Figure 9 The right side of the figure shows a circular tube-shaped air deflector. In actual operation, in addition to designing the air deflector into Figure 9 The shape shown can also be designed as a square tube-shaped air guide cover, and this application does not impose any specific restrictions on this.

[0111] Second, the present application provides a heat dissipation device, which is manufactured according to the design method of claim 1; Figure 10 、 Figure 11 、 Figure 12 and Figure 13 As shown, Figure 10 This is a schematic diagram of the structure of the heat dissipation device installed in the 3D printer provided in an embodiment of the present application, viewed from a top view. Figure 11 This is a schematic diagram of the structure of the heat dissipation device installed in the 3D printer provided in an embodiment of the present application, viewed from an upward angle. Figure 12 This is an exploded schematic diagram of a top view of a heat dissipation device installed in a 3D printer provided in an embodiment of the present application. Figure 13 This is an exploded diagram of a heat dissipation device installed in a 3D printer provided in an embodiment of the present application, viewed from above. The device includes: a water-cooled heat dissipation structure 300 and an air-cooled heat dissipation structure 400. In order to highlight the relative positional relationship between the heat dissipation device and the 3D printer, Figure 10 、 Figure 11 、 Figure 12 and Figure 13 The relevant structures used for 3D printing in the 3D printer are not shown.

[0112] The water-cooling heat dissipation structure 300 is used to discharge the heat absorbed from the body of the 3D printer during the circulation of the heat exchange medium inside the body of the 3D printer to the outside of the body of the 3D printer.

[0113] The air-cooled heat dissipation structure 400 is used to transport the cold air sucked from the outside of the body to the water-cooled heat dissipation structure 300 through the air guide cover 410 with a curved portion in the air-cooled heat dissipation structure 400, so as to increase the heat dissipation speed of the water-cooled heat dissipation structure 300.

[0114] Specifically, in the embodiment of the present application, the water cooling heat dissipation structure 300 includes at least a water pump ( Figure 10 etc. are not shown in the accompanying drawings), water flow pipeline ( Figure 10 etc. (not shown in the drawings) and the radiator 310, etc.; the water pipeline is arranged inside the body of the 3D printer; the heat exchange medium is usually liquid water, and in actual operation, other liquid media that can conduct heat can also be used.

[0115] During the operation of the water-cooling heat dissipation structure 300, the water pump drives the water in the water pipe to circulate. During the water circulation process, the heat inside the 3D printer body is transported to the radiator 310, and the radiator 310 transports the heat to the outside of the 3D printer body.

[0116] In the embodiment of the present application, the air-cooled heat dissipation structure 400 includes at least an air deflector 410. In actual operation, the air inlet of the air deflector 410 is set at the bottom of the 3D printer, absorbing cold air from the bottom, and then transporting the cold air to the radiator 310 and blowing it horizontally toward the radiator 310. The principle of the cold air transported by the air deflector 410 blowing toward the radiator 310 has been described above and will not be repeated here.

[0117] In one implementation, the water-cooling heat dissipation structure 300 includes a radiator 310 , and the air-cooling heat dissipation structure 400 further includes an exhaust fan 420 and an exhaust fan bracket 430 .

[0118] The radiator 310 is embedded in the 3D printer's frame 200 and is used to dissipate heat absorbed by the heat exchange medium from the printer body to the outside. An exhaust fan 420 is located between the shroud 410 and the radiator 310 and is used to transport the cool air absorbed by the shroud 410 to the radiator 310. An exhaust fan bracket 430 is used to support the exhaust fan 420.

[0119] Specifically, in the embodiment of the present application, the exhaust fan 420 includes multiple fans for accelerating the cold air at the air outlet of the air duct 410 to blow toward the radiator 310; the exhaust fan bracket 430 is used to support the exhaust fan 420 to prevent the exhaust fan 420 from detaching from the 3D printer when the speed is too high; in actual operation, other wind speed acceleration structures can also be used to accelerate the cold air at the air outlet of the air duct 410, and other supporting structures can also be collected to stably support the exhaust fan 420, and the present application does not make specific limitations on this.

[0120] In one implementation, the device further includes: a cold air filtering structure 500; the cold air filtering structure 500 is slidably connected to the exterior of the 3D printer body;

[0121] When the cold air filter structure 500 slides to the air inlet for inhaling cold air in the air-cooling and heat dissipation structure 400, the cold air at the air inlet is filtered by the filter cotton 510 in the cold air filter structure 500;

[0122] When the cold air filtering structure 500 slides away from the air inlet for inhaling cold air in the air-cooling and heat dissipation structure 400, the filter cotton can be replaced.

[0123] Specifically, in the embodiment of the present application, the cold air filtering structure 500 is installed on the bottom side of the 3D printer, and the filter cotton 510 included therein can cover the air inlet of the air deflector 410, and is used to filter the cold air that is about to enter the air deflector 410, and prevent impurities from entering the exhaust fan 420 and the radiator 310, causing damage to the devices; in actual operation, since the cold air filtering structure 500 is slidable, the operation of replacing the filter cotton 510 is very convenient, so the filter cotton 510 can be replaced in time, thereby effectively improving the filtration efficiency and filtration quality.

[0124] In actual operation, the cold air filtering structure 500 may also include a filter cover 520 and a buffer cotton 530. The filter cover 520 is used as a support structure for the filter cotton 510, and can press the filter cotton 510 against the air inlet of the guide cover 410. The buffer cotton 530 is used as a buffer cotton between the heat sink and the shell of the 3D printer to prevent the heat sink and the shell of the 3D printer from colliding and damaging the heat sink and the shell of the 3D printer.

[0125] Third, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, steps S110 to S130 provided in the above embodiment are implemented.

[0126] Fourth, the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, steps S110 to S130 of the above embodiment are executed.

[0127] Fifth, the computer program product provided in this application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method in the previous method embodiment. For specific implementation, please refer to steps S110 to S130 of the method embodiment, which will not be repeated here.

[0128] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0129] In addition, the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0130] Furthermore, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0131] It should be noted that if the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0132] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0133] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A design method for a heat dissipation device, characterized in that: The method comprises: Determine the design of the heat dissipation device to be configured in the 3D printer; The heat dissipation device includes a radiator and a shroud having a curved portion, wherein the shroud is used to transport cold air drawn in from outside the 3D printer to the radiator; the design solution includes shape data of the shroud; Determine, based on the shape data, a ratio of the area of a cross section of each sampling point in the air deflector located in the cold air flow direction to the area of the air outlet of the air deflector to obtain a plurality of area ratios; Wherein, the cross section where the sampling point is located is perpendicular to the flow direction of the cold air at the sampling point; If a plurality of the area ratios are within the target value range, the design solution is determined to be qualified.

2. The method according to claim 1, characterized in that Determining a design scheme for a heat dissipation device to be configured in the 3D printer includes: Determining structural feature data of the interior of the 3D printer; Wherein, the structural characteristic data indicates the spatial structure inside the body; The design solution is determined according to the structural feature data.

3. The method according to claim 1, characterized in that After determining, based on the shape data, a ratio of the area of a cross section of each sampling point in the air deflector located in the cold air flow direction to the area of the air outlet of the air deflector to obtain multiple area ratios, the method further includes: If a preset number of the area ratios among the plurality of the area ratios are not within the target preset range, updating the shape data of the air duct in the design solution; According to the updated shape data, the step of determining the ratio of the cross-sectional area of each sampling point in the air deflector located in the cold air flow direction and the area of the air outlet of the air deflector according to the shape data to obtain multiple area ratios is re-executed.

4. The method according to claim 1, wherein If the plurality of area ratios are within the target value range, before determining the design solution as qualified, the method further includes: determining a plurality of candidate value ranges; determining a plurality of groups of area ratio values according to the plurality of candidate value ranges; Each candidate numerical range corresponds to at least one group of area ratios; each group of area ratios includes a plurality of area ratios; and a group of area ratios corresponding to the candidate numerical range are all within the candidate numerical range. According to the plurality of groups of area ratio values, a simulated air deflector is constructed to conduct a heat dissipation efficiency test to determine the heat dissipation efficiency corresponding to each of the candidate value ranges; The candidate numerical range corresponding to the simulated air duct with the maximum heat dissipation efficiency is determined as the target numerical range.

5. A heat dissipation device, characterized in that: The device is manufactured according to the design method of claim 1; the device comprises: a water-cooling heat dissipation structure and an air-cooling heat dissipation structure; The water-cooling heat dissipation structure is used to discharge the heat absorbed by the heat exchange medium in the body of the 3D printer during the circulation of the heat exchange medium inside the body of the 3D printer to the outside of the body of the 3D printer; The air-cooling heat dissipation structure is used to transport the cold air sucked from the outside of the body to the water-cooling heat dissipation structure through the air guide cover with a curved portion in the air-cooling heat dissipation structure, so as to increase the heat discharge speed of the water-cooling heat dissipation structure.

6. The device according to claim 5, characterized in that The water-cooling heat dissipation structure includes a radiator, and the air-cooling heat dissipation structure also includes an exhaust fan and an exhaust fan bracket; The radiator is embedded in the frame of the 3D printer and is used to discharge the heat inside the machine body absorbed by the heat exchange medium to the outside of the machine body; The exhaust fan is arranged between the air deflector and the radiator, and is used to transport the cold air absorbed by the air deflector to the radiator; The exhaust fan bracket is used to support the exhaust fan.

7. The device according to claim 5, characterized in that The device further comprises: a cold air filtering structure; the cold air filtering structure is slidably connected to the exterior of the 3D printer body; When the cold air filtering structure slides to the air inlet for inhaling cold air in the air-cooling and heat dissipation structure, the cold air at the air inlet is filtered by the filter cotton in the cold air filtering structure; When the cold air filtering structure slides away from the air inlet for inhaling cold air in the air-cooling and heat dissipation structure, the filter cotton can be replaced.

8. An electronic device, characterized in that: The electronic device includes a processor and a memory, the memory is used to store application programs, and the processor runs or executes the software program stored in the memory so that the electronic device implements the design method of the heat dissipation device according to any one of claims 1 to 4.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store program codes executed by a processor, and the program codes are used to implement the design method of the heat dissipation device according to any one of claims 1 to 4.

10. A computer program product, characterized in that The computer program product includes computer instructions. When the computer instructions are run on an electronic device, the electronic device implements the method for designing a heat dissipation device according to any one of claims 1 to 4.

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