Lamp box

Abstract

The utility model provides a lamp box which comprises a frame and at least one welding lamp module, and each welding lamp module comprises a cooling base and a welding lamp set. A cooling cavity is formed in the cooling base, an inlet and an outlet are formed in the two ends of the cooling base respectively, and a plurality of division bars are arranged in the cooling cavity at intervals and divide the cooling cavity into a plurality of flow channels. The flow channel comprises n flow channel sections which are sequentially communicated, and in every two adjacent flow channel sections of the same flow channel, the cross section area of the flow channel section close to the inlet is larger than that of the flow channel section close to the outlet; or the cross section area of the flow channel is gradually reduced from the first end, close to the inlet, of the flow channel to the second end, close to the outlet, of the flow channel. Through the arrangement of the flow channel, the flowing speed of the cooling medium in the flow channel is increased, so that weakening of the heat dissipation performance of the cooling medium caused by temperature rise is made up, finally the difference degree of the heat dissipation performance at different positions of the flow channel is reduced, and uniform heat dissipation of the welding lamp set by the cooling base is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic production equipment, in particular to a lamp box. BACKGROUND

[0002] A common welding method of photovoltaic modules is to heat the photovoltaic module through a lamp box, weld the solder strip to the cell sheet, and form a connected module. The temperature field of the welding area directly affects the welding effect, so the temperature control requirement is very high.

[0003] In order to achieve high efficiency and high quality welding, the lamp box generally adopts high power welding, and in order to avoid overheating of the temperature field caused by high power, the lamp box needs to have good heat dissipation performance. At present, a relatively optimal lamp box structure is to install the welding lamp group on the cooling seat, and a plurality of flow channels for cooling medium (such as cooling water) to flow are arranged in the cooling seat. The cooling medium flows into the flow channel from the inlet at one end of the cooling seat, and finally flows out from the outlet at the other end of the cooling seat. In this process, the cooling seat and the welding lamp group exchange heat, thereby cooling the welding lamp group.

[0004] The present application relates to the field of photovoltaic production equipment, in particular to a lamp box. The present application relates to the field of photovoltaic production equipment, in particular to a lamp box.

[0005] In view of the above technical problems, the present application provides a lamp box, and the detailed technical scheme is as follows:

[0006] A lamp box, comprising a frame and at least one welding lamp module, the welding lamp module comprising a cooling seat and a welding lamp group, wherein:

[0007] The cooling seat is arranged on the frame, and the cooling seat is provided with a cooling cavity. The first end of the cooling seat in the first direction is provided with an inlet communicating with the cooling cavity, and the second end of the cooling seat in the first direction is provided with an outlet communicating with the cooling cavity. A plurality of partition strips extending in the first direction are arranged in the cooling cavity in the second direction, and the cooling cavity is divided into a plurality of flow channels extending in the first direction by the plurality of partition strips.

[0008] The flow channel comprises n flow channel sections in sequence, and the cross-sectional area of the flow channel section close to the inlet is greater than that of the flow channel section close to the outlet in the two adjacent flow channel sections of the same flow channel; or the cross-sectional area of the flow channel tapers from the first end close to the inlet of the flow channel to the second end close to the outlet of the flow channel.

[0009] The welding lamp group is arranged on the cooling seat.

[0010] wherein the second direction is perpendicular to the first direction, and n≥2.

[0011] The lamp box provided in the present application has a flow channel in the cooling seat, which is composed of n flow channel segments. In the two adjacent flow channel segments, the cross-sectional area of the flow channel segment close to the inlet is greater than that of the flow channel segment close to the outlet, or the cross-sectional area of the flow channel tapers from the first end close to the inlet to the second end close to the outlet. By setting the flow channel as described above, the flow speed of the cooling medium in the flow channel is accelerated, that is, the flow speed of the cooling medium close to the outlet is greater than that close to the inlet. Since the faster the flow speed of the cooling medium, the more heat it carries away in unit time.

[0012] Therefore, by setting the flow channel as described above, the weakening of the heat dissipation performance of the cooling medium due to temperature rise can be compensated for, and the difference in heat dissipation performance at different positions of the flow channel is ultimately reduced, thereby achieving uniform heat dissipation of the welding lamp module by the cooling seat.

[0013] In some embodiments, the transition between the two adjacent flow channel segments of the same flow channel forms a step portion, so that the cross-sectional area of the flow channel segment close to the inlet is greater than that of the flow channel segment close to the outlet.

[0014] After the cooling medium enters the same flow channel, it is accelerated once after passing through each step portion, so that the flow speed of the cooling medium in the flow channel is accelerated. In addition, such a setting facilitates the processing and molding of the flow channel, for example, a cutting-to-groove process can be used, and the cutting depth is gradually reduced from the inlet to the outlet, so that a flow channel can be quickly processed.

[0015] In some embodiments, the bottom surface of the flow channel between the two adjacent partition strips is an inclined surface, so that the cross-sectional area of the flow channel tapers from the first end close to the inlet to the second end close to the outlet.

[0016] After the cooling medium enters the same flow channel, it can be continuously accelerated, so that the flow speed of the cooling medium in the flow channel is accelerated. In addition, such a setting facilitates the processing and molding of the flow channel, for example, a cutting-to-groove process can be used, and the cutting depth is gradually reduced from the inlet to the outlet, so that a flow channel can be quickly processed.

[0017] In some embodiments, the first end of the welding lamp module is provided with a first pipe joint connected with the inlet of the cooling seat, and the second end of the welding lamp module is provided with a second pipe joint connected with the outlet of the cooling seat.

[0018] By setting the first pipe joint and the second pipe joint, the inlet and the outlet of the cooling seat can be connected with the cooling medium supply device to form a circulating cooling loop.

[0019] In some embodiments, the cooling seat comprises a seat body and a cover plate, wherein the cooling cavity, the inlet and the outlet are arranged on the seat body, the cooling cavity has an opening which is open to a first surface of the seat body; the cover plate covers the first surface of the seat body to seal the opening of the cooling cavity; and the welding lamp group is arranged on a second surface of the seat body which is opposite to the first surface.

[0020] The cooling seat is set as a split structure composed of the seat body and the cover plate, which facilitates the processing and forming of the cooling cavity, the inlet and the outlet and the like, and facilitates the cleaning and maintenance of the cooling cavity, the inlet and the outlet. In addition, the welding lamp group is in direct contact with the second surface of the seat body, which can improve the heat dissipation effect of the cooling seat on the welding lamp group.

[0021] In some embodiments, the cover plate is provided with a protruding portion protruding from the cover plate on a side surface thereof facing the seat body, the protruding portion is embedded into the cooling cavity through the opening of the cooling cavity and is in abutment or gap fit with the side surface of the partition strip.

[0022] The gap fit between the protruding portion of the cover plate and the side surface of the partition strip can make part of the cooling medium enter the gap, thereby increasing the heat exchange area and improving the heat dissipation effect.

[0023] In some embodiments, the protruding portion is in gap fit with the side surface of the partition strip; a first uniform pressure cavity is formed between a first side wall of the protruding portion and a first side wall of the cooling cavity, the first uniform pressure cavity is connected with the inlet of the cooling seat and each flow channel; and a second uniform pressure cavity is formed between a second side wall of the protruding portion and a second side wall of the cooling cavity, the second uniform pressure cavity is connected with each flow channel and the outlet of the cooling seat.

[0024] After the cooling medium enters the first uniform pressure cavity from the inlet of the cooling seat, it is divided into each flow channel, and the cooling medium flowing out of each flow channel is finally discharged through the outlet of the cooling seat after converging in the second uniform pressure cavity. In this way, the hydraulic consistency in each flow channel can be improved, and the uniform heat dissipation of the cooling seat on the welding lamp group is further improved.

[0025] In some embodiments, the welding lamp group comprises a circuit board and a plurality of lamp strips, wherein: a mounting groove is arranged on a side surface of the cover plate away from the seat body, and the circuit board is arranged in the mounting groove; the plurality of lamp strips are arranged side by side on the second surface of the seat body and extend along a first direction or a second direction, and both ends of each lamp strip are electrically connected to the circuit board through lead-out wires.

[0026] The welding lamp group is composed of a plurality of lamp strips, and each lamp strip is electrically connected to the circuit board through an independent lead-out wire, thereby facilitating the replacement of the lamp strips. In addition, the lead-out wires of the lamp strips are led out from both ends and electrically connected to the circuit board, thereby bypassing the cooling cavity.

[0027] In some embodiments, the welding lamp module further comprises a back plate and a terminal seat, the back plate is installed on the cover plate and fixed on the frame, the back plate is provided with a mounting hole for mounting the terminal seat at the mounting groove, and the terminal seat and the circuit board are electrically connected.

[0028] By arranging the back plate, a mounting space is provided for the terminal seat, and the cooling seat is protected.

[0029] In some embodiments, the lamp box further comprises a glass plate, the glass plate is installed on the frame and covers the welding lamp group.

[0030] By arranging the glass plate, the welding lamp group is protected.

[0031] In some embodiments, the lamp box comprises at least two welding lamp modules, and the at least two welding lamp modules are arranged side by side on the frame along the second direction.

[0032] According to the specific size of the battery piece to be welded, the number of welding lamp modules can be adjusted, so that the lamp box is compatible with battery pieces of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structural schematic view of the lamp box in the embodiment of the present application from one perspective;

[0034] Figure 2 A structural schematic view of the lamp box in the embodiment of the present application from another perspective;

[0035] Figure 3 A structural schematic view of the lamp box in the embodiment of the present application from another perspective without the back plate;

[0036] Figure 4 A structural schematic view of the lamp box in the embodiment of the present application from another perspective without the cover plate;

[0037] Figure 5 A structural schematic view of the lamp box in the embodiment of the present application from another perspective; Figure 4 A local enlarged view of region A in FIG. 8;

[0038] Figure 6 A structural schematic view of one welding lamp module in the embodiment of the present application;

[0039] Figure 7 A structural schematic view of the welding lamp module in the embodiment of the present application without the cover plate;

[0040] Figure 8 A structural schematic view of the cover plate in the embodiment of the present application;

[0041] Figure 9 A sectional structural schematic view of the welding lamp module in the embodiment of the present application.

[0042] Figures 1 to 9 comprising:

[0043] the frame 1;

[0044] the welding lamp module 2:

[0045] the cooling seat 21, the seat body 211, the cover plate 212, the convex part 213, the first uniform pressure cavity 214, the second uniform pressure cavity 215, and the mounting groove 216;

[0046] the welding lamp group 22: the lamp strip 221;

[0047] the cooling cavity 23;

[0048] the inlet 24;

[0049] the outlet 25;

[0050] the partition strip 26;

[0051] the flow channel 27, the flow channel section 271, and the step part 272;

[0052] the first pipe joint 28;

[0053] the second pipe joint 29;

[0054] the back plate 210 and the mounting hole 2101. DETAILED DESCRIPTION

[0055] To make the above objectives, features and advantages of the present application more apparent and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] As described in the background section, the present inventors found through analysis that, during the flow of the cooling medium in the flow channel, the temperature of the cooling medium constantly rises due to the absorption of heat emitted by the lamp group, while the flow rate of the cooling medium in the flow channel basically remains unchanged, thereby resulting in that the heat dissipation effect at the position close to the outlet of the flow channel is much lower than that at the position close to the inlet of the flow channel, and ultimately leading to that the cooling seat cannot uniformly dissipate heat at different positions of the welding lamp group, thereby affecting the welding effect.

[0057] In view of this, the present application provides a lamp box which can realize uniform heat dissipation of the welding lamp group by the cooling seat. As shown in Figures 1 to 9 the lamp box in the embodiments of the present application comprises the frame 1 and at least one welding lamp module 2, and the welding lamp module 2 comprises the cooling seat 21 and the welding lamp group 22, wherein:

[0058] A cooling seat 21 is mounted on a frame 1. A cooling cavity 23 is provided inside the cooling seat 21. An inlet 24 communicating with the cooling cavity 23 is provided at the first end of the cooling seat 21 along a first direction (such as the X direction). An outlet 25 communicating with the cooling cavity 23 is provided at the second end of the cooling seat 21 along the first direction. Multiple partitions 26 extending along the first direction are provided at intervals inside the cooling cavity 23 along a second direction (such as the Y direction). The multiple partitions 26 divide the cooling cavity 23 into multiple flow channels 27 extending along the first direction.

[0059] The flow channel 27 can have two structural forms. The first form consists of n sequentially connected flow channel segments 271. In the same flow channel 27, the cross-sectional area of ​​the flow channel segment 271 closer to the inlet 24 is larger than the cross-sectional area of ​​the flow channel segment 271 closer to the outlet 25. The second form consists of a flow channel 27 whose cross-sectional area gradually decreases from its first end to its second end, where the first end of the flow channel 27 is the end closer to the inlet 24, and the second end of the flow channel 27 is the end closer to the outlet 25.

[0060] The welding lamp assembly 22 is mounted on the cooling base 21.

[0061] Wherein, the second direction is perpendicular to the first direction, and n≥2.

[0062] Because the cooling base 21 has multiple flow channels 27 extending along the first direction, during the operation of the lamp box, the cooling medium flows from the inlet 24 of the cooling base 21 into each flow channel 27, and finally flows out from the outlet 25 of the cooling base 21. During this process, the cooling medium exchanges heat with the welding lamp assembly 22, thereby cooling the welding lamp assembly 22.

[0063] For the flow channel 27 of the first structure mentioned above, the cooling medium will be accelerated once when it flows from the current flow channel segment 271 to the next adjacent flow channel segment 271, thereby increasing the flow speed of the cooling medium in the flow channel 27.

[0064] like Figures 4 to 5 In the illustrated embodiment, each flow channel 27 is composed of two (i.e., n=2) flow channel segments 271. Therefore, the cooling medium is accelerated once in each flow channel 27. Of course, in other embodiments, each flow channel 27 may also be composed of 3, 4, 5 or other numbers of flow channel segments 271. Correspondingly, the cooling medium is accelerated 2, 3 or 4 times or other times in each flow channel 27.

[0065] Regarding the flow channel 27 of the second structure mentioned above, the cooling medium in the flow channel 27 is continuously accelerated during the flow process, which can also increase the flow speed of the cooling medium in the flow channel 27.

[0066] The flow speed of the cooling medium in the flow channel 27 is accelerated, and the flow speed of the cooling medium at a position close to the outlet 25 is greater than the flow speed at a position close to the inlet 24. Since the cooling medium carries away more heat in unit time as the flow speed of the cooling medium is greater, the weakening of the heat dissipation performance of the cooling medium due to the temperature rise can be compensated for, and the difference in the heat dissipation performance of the cooling seat 21 at different positions of the flow channel 27 is ultimately reduced, thereby achieving uniform heat dissipation of the welding lamp group 22 by the cooling seat 21.

[0067] The cooling medium may be, for example, cooling water, cooling oil, or the like.

[0068] The lamp box in the embodiments of the present application is suitable for heating a battery piece and a solder strip to weld the solder strip to the battery piece. It is particularly suitable for welding of a back contact type battery piece (IBC battery piece) or other thinner battery pieces, which have a higher requirement for the uniformity of the temperature field during the welding process.

[0069] The lamp box in the embodiments of the present application can also be used to cure a printed layer on a battery piece or for other scenarios requiring lamp box heating.

[0070] As shown in Figures 4 to 5 For the case where the flow channel 27 is composed of n flow channel segments 271 that are sequentially penetrated, an optional embodiment is that a step portion 272 is formed at the transition between two adjacent flow channel segments 271 of the same flow channel 27, so that the cross-sectional area of the flow channel segment 271 close to the inlet 24 is greater than the cross-sectional area of the flow channel segment 271 close to the outlet 25. In this way, after the cooling medium enters the same flow channel 27, it is accelerated once after passing through each step portion 272, thereby accelerating the flow speed of the cooling medium in the flow channel 27.

[0071] In addition, in this way, the processing and forming of the flow channel 27 are facilitated, for example, a cutting-to-groove process can be used, and the cutting depth is gradually reduced from the inlet 24 to the outlet 25, so that a flow channel 27 can be quickly processed.

[0072] For the case where the cross-sectional area of the flow channel 27 tapers from the first end of the flow channel 27 to the second end of the flow channel 27, an optional embodiment is that the bottom surface of the flow channel 27 between two adjacent partition strips 26 is provided as an inclined surface. In this way, the cross-sectional area of the flow channel 27 can be ensured to taper from the first end of the flow channel 27 to the second end of the flow channel 27.

[0073] In addition, in this way, the processing and forming of the flow channel 27 are facilitated, for example, a cutting-to-groove process can be used, and the cutting depth is gradually reduced from the inlet 24 to the outlet 25, so that a flow channel 27 can be quickly processed.

[0074] As shown in Figures 3 to 4As shown, optionally, the first end of the welding lamp module 2 is provided with a first pipe joint 28, which is connected with the inlet 24 of the cooling seat 21. The second end of the welding lamp module 2 is provided with a second pipe joint 29, which is connected with the outlet 25 of the cooling seat 21.

[0075] Through the first pipe joint 28 and the second pipe joint 29, the inlet 24 and the outlet 25 of the cooling seat 21 can be connected with a cooling medium supply device to form a circulating cooling loop. The cooling medium supplied by the cooling medium supply device enters into the cooling seat 21 through the pipeline, the first pipe joint 28 and the inlet 24, so as to realize heat exchange with the welding lamp group 22. The cooling medium carrying heat flows back to the cooling medium supply device through the outlet 25, the second pipe joint 29 and the pipeline. Such circulation is implemented to continuously cool the cooling seat 21.

[0076] As shown, Figures 7 to 9 Optionally, the cooling seat 21 comprises a seat body 211 and a cover plate 212, wherein the cooling cavity 23, the inlet 24 and the outlet 25 are arranged on the seat body 211, and the cooling cavity 23 has an opening which is open to a first surface of the seat body 211. The cover plate 212 covers the first surface of the seat body 211 to seal the opening of the cooling cavity 23. The welding lamp group 22 is arranged on a second surface of the seat body 211 opposite to the first surface.

[0077] The partition strips 26 are arranged in the cooling cavity 23 of the seat body 211, and the surface of the cooling cavity 23 between adjacent partition strips 26 is the bottom surface of the flow channel 27, and the top surface of the flow channel 27 is covered by the cover plate 212. The "bottom surface" and "top surface" of the flow channel 27 described herein are not limited to a certain orientation. When the orientation of the lamp box is changed, the bottom surface of the flow channel 27 can be located at the top, bottom or other positions of the flow channel 27, and similarly, the top surface of the flow channel 27 can also be located at the top, bottom or other positions of the flow channel 27. The cooling seat 21 is arranged in a split structure composed of the seat body 211 and the cover plate 212, which facilitates the processing and forming of the cooling cavity 23, the inlet 24 and the outlet 25 and the cleaning and maintenance of the cooling cavity 23, the inlet 24 and the outlet 25. In addition, the welding lamp group 22 directly contacts the second surface of the seat body 211, which can improve the heat dissipation effect of the cooling seat 21 on the welding lamp group 22.

[0078] As shown, Figures 7 to 9 Optionally, the cover plate 212 is provided with a protruding portion 213 protruding from the cover plate 212 on the side surface thereof facing the seat body 211, and the protruding portion 213 is embedded into the cooling cavity 23 through the opening of the cooling cavity 23 and is in gap cooperation with the side surface of the partition strip 26. That is, a gap is formed between the protruding portion 213 and the side surface of the partition strip 26, as shown. Figure 7 As shown, the upper surface of the partition strip 26 is the side surface of the partition strip 26 described above.

[0079] The convex part 213 of the cover plate 212 is in gap fit with the side surface of the partition strip 26, so that part of the cooling medium enters the gap, thus increasing the heat exchange area and improving the heat dissipation effect on the welding lamp group 22.

[0080] Of course, in other optional embodiments, the convex part 213 can also be in fit with the side surface of the partition strip 26, so as to form a plurality of mutually isolated flow channels 27.

[0081] As shown in Figure 9 , a first uniform pressure cavity 214 is formed between the first side wall of the convex part 213 and the first side wall of the cooling cavity 23, and the first uniform pressure cavity 214 is connected to the inlet 24 of the cooling seat 21 and each flow channel 27. A second uniform pressure cavity 215 is formed between the second side wall of the convex part 213 and the second side wall of the cooling cavity 23, and the second uniform pressure cavity 215 is connected to each flow channel 27 and the outlet 25 of the cooling seat 21.

[0082] The cooling medium enters the first uniform pressure cavity 214 from the inlet 24 of the cooling seat 21, and then is distributed into each flow channel 27. The cooling medium flowing out of each flow channel 27 converges in the second uniform pressure cavity 215, and then flows out through the outlet 25 of the cooling seat 21.

[0083] By providing the first uniform pressure cavity 214 and the second uniform pressure cavity 215, the consistency of the hydraulic pressure in each flow channel 27 can be improved, thereby further improving the uniform heat dissipation of the cooling seat 21 on the welding lamp group 22. In order to ensure the consistency of the hydraulic pressure flowing into each flow channel 27, as shown in Figure 9 , the width of the first uniform pressure cavity 214 and the second uniform pressure cavity 215 in the X direction is relatively wide compared with the width of each flow channel 27 in the Y direction.

[0084] As shown in Figure 3 and Figure 6 , the welding lamp group 22 includes a circuit board and a plurality of lamp strips 221, wherein: a mounting groove 216 is provided on the side surface of the cover plate 212 away from the seat body 211, and the circuit board is arranged in the mounting groove 216. The plurality of lamp strips 221 are arranged side by side on the second surface of the seat body 211 and extend in the first direction or the second direction, and both ends of each lamp strip 221 are electrically connected to the circuit board through lead-out wires.

[0085] Since the welding lamp group 22 is composed of a plurality of lamp strips 221, and each lamp strip 221 is electrically connected to the circuit board through an independent lead-out wire, the replacement of the lamp strip 221 is facilitated. In addition, the lead-out wires of the lamp strip 221 are led out from both ends and bypass the side wall of the seat body 211 to be electrically connected to the circuit board, thereby avoiding the cooling cavity 23 and not affecting the sealing performance of the cooling cavity 23.

[0086] As shown in Figure 2 and Figure 3As shown, optionally, the welding lamp module further comprises a back plate 210 and a terminal seat, the back plate 210 is installed on the cover plate 212 and fixed on the frame 1, the back plate 210 is provided with a mounting hole 2101 for mounting the terminal seat at the mounting groove 216, and the terminal seat is electrically connected with the circuit board.

[0087] By arranging the back plate 210, the mounting space is provided for the terminal seat, and the cooling seat 21 is protected.

[0088] Optionally, the lamp box in the embodiment of the present application further comprises a glass plate, the glass plate is installed on the frame 1 and covers the welding lamp group 22. By arranging the glass plate, the protection of the welding lamp group 22 is realized.

[0089] Optionally, the lamp box in the embodiment of the present application comprises at least two welding lamp modules 2, and the at least two welding lamp modules 2 are arranged side by side along the second direction on the frame 1. In the specific implementation process, the number of the welding lamp modules 2 can be adjusted according to the specific size of the battery piece to be welded, so as to improve the compatibility of the lamp box for battery pieces of different sizes.

[0090] The above is a detailed description of the present application with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should belong to the protection scope of the present application. The scope of protection claimed by the present application is defined by the claims, not by the above description of the embodiments.

Claims

1. A light box, characterized in that, The lamp box comprises a frame and at least one welding lamp module, the welding lamp module comprising a cooling seat and a welding lamp group, wherein: The cooling seat is arranged on the frame, the cooling seat is provided with a cooling cavity, the first end of the cooling seat in the first direction is provided with an inlet communicating with the cooling cavity, the second end of the cooling seat in the first direction is provided with an outlet communicating with the cooling cavity, and a plurality of partition strips extending in the first direction are arranged in the cooling cavity in the second direction. The flow channel comprises n flow channel segments in sequence, and the cross-sectional area of the flow channel segment close to the inlet is greater than that of the flow channel segment close to the outlet in the two adjacent flow channel segments of the same flow channel; or the cross-sectional area of the flow channel tapers from the first end close to the inlet to the second end close to the outlet of the flow channel. The welding lamp group is arranged on the cooling seat. The second direction is perpendicular to the first direction, and n≥2.

2. The light box of claim 1, wherein, The transition of the two adjacent flow channel segments of the same flow channel forms a stepped portion, so that the cross-sectional area of the flow channel segment close to the inlet is greater than that of the flow channel segment close to the outlet.

3. The light box of claim 1, wherein, The bottom surface of the flow channel between the two adjacent partition strips is an inclined surface, so that the cross-sectional area of the flow channel tapers from the first end close to the inlet to the second end close to the outlet of the flow channel.

4. The light box of claim 1, wherein, The first end of the welding lamp module is provided with a first pipe joint connected with the inlet of the cooling seat. The second end of the welding lamp module is provided with a second pipe joint connected with the outlet of the cooling seat.

5. The light box of claim 1, wherein, The cooling seat comprises a seat body and a cover plate, wherein the cooling cavity, the inlet and the outlet are arranged on the seat body, and the cooling cavity has an opening open to the first surface of the seat body. The cover plate is covered on the first surface of the seat body to block the opening of the cooling cavity. The welding lamp group is arranged on the second surface of the seat body opposite to the first surface.

6. The light box of claim 5, wherein, The side surface of the cover plate towards the seat body is provided with a convex portion protruding from the cover plate, the convex portion is embedded into the cooling cavity through the opening of the cooling cavity, and the side surface of the convex portion is fitted with or gap-fitted with the side surface of the partition strip.

7. The lamp box of claim 6, wherein: A first uniform pressure cavity is formed between the first side wall of the convex portion and the first side wall of the cooling cavity, and the first uniform pressure cavity communicates with the inlet of the cooling seat and each flow channel; A second uniform pressure cavity is formed between the second side wall of the convex portion and the second side wall of the cooling cavity, and the second uniform pressure cavity communicates with each flow channel and the outlet of the cooling seat.

8. The light box of claim 6, wherein, The welding lamp group comprises a circuit board and a plurality of lamp strips, wherein: The side surface of the cover plate away from the seat body is provided with a mounting groove, and the circuit board is arranged in the mounting groove. A plurality of the lamp strips are arranged side by side on the second surface of the seat body and extend along the first direction or the second direction, and both ends of each lamp strip are electrically connected to the circuit board through lead-out wires.

9. The light box of claim 8, wherein, The welding lamp module further comprises a back plate and a terminal block, the back plate is installed to cover the cover plate and is fixed on the frame, the back plate is provided with a mounting hole for mounting the terminal block at the mounting groove, and the terminal block is electrically connected to the circuit board.

10. The light box of claim 1, wherein, The lamp box further comprises a glass plate, the glass plate is installed on the frame and covers the welding lamp group.

11. The light box of claim 1, wherein, The lamp box comprises at least two welding lamp modules, and the at least two welding lamp modules are arranged side by side on the frame along the second direction.

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