Water-cooling and air-cooling combined heat dissipation device for laser cutting machine electrical cabinet

Abstract

The application relates to the technical field of laser cutting equipment, and discloses a water-cooling and air-cooling composite heat dissipation device for an electric appliance cabinet of a laser cutting machine, which comprises an electric appliance cabinet shell, one of the inner side walls of the electric appliance cabinet shell is fixedly installed with a pre-cooling box, one of the inner side walls of the pre-cooling box is fixedly connected with a isolation cover, the isolation cover is rotationally connected with a filter element, a cooling element is arranged at the lower part in the pre-cooling box, a fixed pipe with a T-shaped structure is arranged above the cooling element, and air inlet elements are arranged at the symmetrical two ends of the fixed pipe. The air inlet elements rotate simultaneously to drive the filter element to rotate; the partition plate divides the airflow entering the fixed pipe, most of the pre-cooling airflow blows to the electric appliance cabinet shell to realize main heat dissipation, a small part of the pre-cooling airflow passes through the partition plate and flows along the surface of the double-shaft motor, blows to the filter element after taking away the heat of the motor, and realizes self-cleaning of the filter element. The filter element can effectively intercept the metal dust suspended in the laser cutting processing environment, and meanwhile, the heat generated by the motor is prevented from mixing into the main cooling airflow to neutralize the pre-cooling effect.

Description

Technical Field

[0001] This invention relates to the field of laser cutting equipment technology, and in particular to a water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine. Background Technology

[0002] As laser cutting equipment develops towards higher power and higher integration, the heat flux density of power components such as servo drives and frequency converters integrated inside their electrical cabinets has increased dramatically. Conventional air cooling alone is no longer sufficient to meet their temperature control requirements. Therefore, a composite cooling method combining water cooling and air cooling is gradually being applied in this field. In existing typical solutions, cooling water flows through a finned tube heat exchanger in a pre-cooling chamber via a circulation pipeline to pre-cool the cooling airflow entering the electrical cabinet. Simultaneously, a fan delivers the cool air to various heat-generating areas within the cabinet, thereby improving the overall heat dissipation effect.

[0003] However, metal dust is often suspended in the air during laser cutting processes. This composite heat dissipation solution presents the following technical problems in actual operation: First, during the air intake process of the pre-cooling chamber, the metal dust carried by the airflow easily adheres to the surface of the fins and fan blades. As operating time increases, the dust layer gradually thickens, significantly increasing wind resistance and reducing the heat exchange efficiency of the fins, resulting in a continuous decline in air cooling efficiency. To alleviate this problem, existing technologies typically install filters at the air inlet, but these filters are prone to clogging, requiring frequent manual shutdowns for maintenance, which is cumbersome and further increases the equipment's maintenance costs and downtime. Second, the air-cooled motor generates considerable heat during long-term operation. This heat is directly released into the pre-cooling chamber or air duct, neutralizing the cooling airflow before it enters the cabinet. This partially offsets the pre-cooling effect of water cooling, weakening the overall advantages of the composite heat dissipation solution. Summary of the Invention

[0004] Given the problems of metal dust easily adhering to the fins and fan blades in the existing pre-cooling air-cooling structure of laser cutting electrical cabinets, the need for frequent manual maintenance of filter components, and the fact that the heat from the motor itself can neutralize the pre-cooling effect, a water-cooled and air-cooled composite heat dissipation device for laser cutting machine electrical cabinets is proposed.

[0005] The purpose is to provide a water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine, so as to solve the technical problems of dust adhesion and motor heat generation neutralization and pre-cooling effect in the existing technology, and reduce the maintenance frequency.

[0006] The technical solution of this invention is a water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine, including an electrical cabinet shell. A pre-cooling box is fixedly installed on one inner side wall of the electrical cabinet shell. An isolation cover is fixedly connected to one inner side wall of the pre-cooling box. A circular plate-shaped filter is rotatably connected inside the isolation cover. Two vertically arranged through holes 1 are opened on the side wall of the pre-cooling box corresponding to the filter. A through hole 2 is opened at the lower end of the isolation cover corresponding to one of the through holes 1. A radiator is arranged in the lower part of the pre-cooling box, and the radiator is connected to an external water chiller. A T-shaped fixed pipe is provided above the radiator, and the fixed pipe is fixedly connected to the isolation cover. Air inlets are provided at both ends of the fixed pipe. A trapezoidal partition is fixedly connected inside the fixed pipe. An air inlet is opened on the side of the partition facing the air inlet. A dual-axis motor is fixedly installed inside the partition. The dual-axis motor is used to drive the air inlet to rotate. One of the air inlets and the filter are connected to a transmission component. An air outlet is opened in the middle of the fixed pipe. A through hole is opened on the side of the precooling box corresponding to the air outlet.

[0007] Furthermore, the filter element includes a rotating frame, on the side of the rotating frame away from the isolation cover, a filter screen is fixedly connected, and the rotating frame is rotatably connected to the isolation cover.

[0008] Furthermore, a protective net is fixedly installed inside the through hole.

[0009] Furthermore, the radiator includes a water-cooling pipe and multiple fins arranged linearly and at equal intervals. The water-cooling pipe is connected and fixed to the fins, and both ends of the water-cooling pipe pass through the pre-cooling box and the electrical cabinet housing and extend to the outside.

[0010] Furthermore, the air inlet component includes an air inlet pipe rotatably connected to the fixed pipe, and a fan blade is fixedly installed inside the air inlet pipe; the output shaft of the dual-axis motor movably extends to the outside of the partition and is fixedly connected to a drive gear, and a gear ring is fixedly connected to the inner wall of the air inlet pipe, and the gear ring meshes with the corresponding drive gear.

[0011] Furthermore, the transmission component includes a second gear ring, which is fixedly installed on the outer wall of one of the air inlet pipes. A gear shaft is meshed with one side of the second gear ring, which is rotatably connected to the isolation cover. A third gear ring is meshed with the other end of the gear shaft, which is fixedly installed on the filter element.

[0012] Furthermore, multiple air guide plates are provided on both the upper and lower sides of the dual-axis motor. Each air guide plate has a bent structure. Multiple air guide plates are fixedly connected to the port of the fixed tube facing the isolation cover. Each air guide plate is connected and fixed to the corresponding air guide plate.

[0013] Furthermore, the outer wall of the fixed pipe is provided with an arc-shaped plate, and an air outlet two is opened on the arc-shaped plate. The size of the air outlet two is smaller than that of the air outlet one. Multiple guide plates are fixedly connected to the air outlet two. Adjustment holes are opened at both symmetrical ends of the arc-shaped plate. Bolts are installed in the adjustment holes and are threadedly connected to the fixed pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention separates the transmission of the dual-axis motor from the fan blade structure and divides the area with a partition, allowing the air intake component to rotate while simultaneously driving the filter component to rotate. The partition diverts the airflow entering the fixed pipe; most of the pre-cooled airflow is blown into the electrical cabinet housing for main heat dissipation, while a small portion of the pre-cooled airflow passes through the partition and flows along the surface of the dual-axis motor, carrying away the motor's heat before being blown onto the filter component for self-cleaning. This allows the filter component to effectively intercept suspended metal dust in the laser cutting environment, reducing the frequency of manual maintenance. Simultaneously, it prevents the motor's heat from mixing into the main cooling airflow and neutralizing the pre-cooling effect, thus improving the heat dissipation and cooling effect on the electrical cabinet.

[0015] 2. By adjusting the angle of the arc plate on the outer wall of the fixed pipe, the arc plate and the guide plate work together to direct the direction of the main airflow, so that it can be accurately blown to the high-heat electrical components in the electrical cabinet, further improving the heat dissipation effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the precooling box structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the precooling box of the present invention; Figure 4 This is a schematic diagram of the filter element structure of the present invention; Figure 5 This is a schematic diagram of the air inlet structure of the present invention; Figure 6 This is a schematic diagram of the partition structure of the present invention; Figure 7 This is a schematic diagram of the structure of the first air guide plate and the second air guide plate of the present invention; Figure 8 This is a schematic diagram showing the disassembled structure of the transmission component of the present invention; Figure 9 This is a schematic diagram of the arc-shaped plate and guide plate structure of the present invention.

[0017] In the picture: 1. Electrical cabinet housing; 2. Pre-cooling box; 3. Protective net; 4. Isolation cover; 5. Filter element; 51. Rotating frame; 52. Filter screen; 6. Cooling radiator; 61. Water cooling pipe; 62. Fin; 7. Fixed pipe; 8. Air inlet element; 81. Air inlet duct; 82. Fan blade; 9. Partition plate; 10. Air inlet; 11. Dual-shaft motor; 12. Drive gear; 13. Gear ring one; 14. Transmission element; 141. Gear ring two; 142. Gear shaft; 143. Gear ring three; 15. Bolt; 16. Air guide plate one; 17. Air guide plate two; 18. Arc plate; 19. Flow deflector. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Example 1, referring to Figures 1-6 This is the first embodiment of the present invention, which provides a water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine. The device includes an electrical cabinet housing 1, with a pre-cooling box 2 fixedly installed on one inner side wall of the electrical cabinet housing 1. The pre-cooling box 2 is used to pre-cool the air entering the electrical cabinet housing 1, thereby improving the subsequent heat dissipation effect on the heat-generating components inside the electrical cabinet.

[0020] An isolation cover 4 is fixedly connected to one inner wall of the precooling chamber 2. A circular filter element 5 is rotatably connected inside the isolation cover 4. Two vertically arranged through holes (I) are provided on the side wall of the precooling chamber 2 corresponding to the filter element 5. A second through hole (II) is provided at the lower end of the isolation cover 4 corresponding to one of the first through holes. Outside air enters the isolation cover 4 through the first through hole at the lower position, is filtered by the filter element 5, and then enters the interior of the precooling chamber 2. The two vertically arranged through holes (I) allow the filtration area of ​​the filter element 5 to alternately face the two through holes (I) during rotation.

[0021] The lower part of the precooling box 2 is equipped with a radiator 6, which is connected to an external water chiller. A T-shaped fixed pipe 7 is installed above the radiator 6, which is fixedly connected to the isolation cover 4. Air inlets 8 are installed at both ends of the fixed pipe 7. A trapezoidal partition 9 is fixedly connected inside the fixed pipe 7. An air inlet 10 is opened on the side of the partition 9 facing the air inlet 8. A dual-axis motor 11 is fixedly installed inside the partition 9, which is used to drive the air inlet 8 to rotate. The cooling water supplied by the external water chiller circulates in the radiator 6, reducing the temperature of the air entering the precooling chamber 2. When the dual-shaft motor 11 drives the two air inlets 8 to rotate, negative pressure is generated at both ends of the fixed pipe 7, drawing the air precooled by the radiator 6 into the fixed pipe 7. Under the separation of the partition 9, two airflow channels are formed in the fixed pipe 7, one connected to the air outlet and the other connected to the isolation cover 4. Most of the precooled airflow is discharged through the air outlet and blown towards the heating element in the electrical cabinet housing 1. A small portion of the precooled airflow passes through the air inlet 10 and flows towards the filter 5. The flow path carries away the heat of the dual-shaft motor 11 and finally back-blown the filter 5.

[0022] One of the air inlet components 8 and the filter component 5 are connected by a transmission component 14. An air outlet 1 is opened in the middle of the fixed pipe 7, and a through hole 3 is opened on the side of the precooling box 2 corresponding to the air outlet 1. When the air inlet component 8 rotates, it drives the filter component 5 to rotate slowly through the transmission component 14, so that the filtration area of ​​the filter component 5 alternately corresponds to the two through holes 1. When a small amount of precooled airflow passes through the filter component 5, it blows out the dust and debris intercepted on the outer surface of the filter component 5, thus achieving self-cleaning.

[0023] Specifically, the above technical solution separates the power structure from the air intake structure through the cooperation of the fixed pipe 7, the partition 9, the air inlet 8, and the dual-axis motor 11. The partition 9 isolates the heat of the dual-axis motor 11 and simultaneously diverts the pre-cooling airflow. A small portion of the pre-cooling airflow moves along the surface of the dual-axis motor 11, carries away the heat, and then back-blown the filter 5 to achieve self-cleaning. This significantly reduces the frequency of manual shutdown maintenance and avoids the heat generated by the dual-axis motor 11 neutralizing the pre-cooling effect, thus ensuring heat dissipation efficiency.

[0024] Reference Figure 4 The filter element 5 includes a rotating frame 51, and a filter screen 52 is fixedly connected to the side of the rotating frame 51 away from the isolation cover 4. The rotating frame 51 is rotatably connected to the isolation cover 4.

[0025] Specifically, the filter screen 52 is used to filter impurities such as suspended metal dust in the air, preventing dust from entering the pre-cooling chamber 2 and adhering to the surfaces of the fins 62 and fan blades 82. The rotating frame 51 can rotate relative to the isolation cover 4. When a certain area of ​​the filter screen 52 accumulates a lot of dust, the filtration area can be switched by rotating the filter element 5, thus extending the maintenance cycle.

[0026] Reference Figure 2 A protective net 3 is fixedly installed inside the through hole.

[0027] Specifically, a protective net 3 is fixedly installed inside the through hole 1. The protective net 3 is used to prevent larger foreign objects from entering the pre-cooling box 2 and plays a preliminary protective role.

[0028] Reference Figure 3 The radiator 6 includes a water-cooling pipe 61 and multiple fins 62 arranged linearly and at equal intervals. The water-cooling pipe 61 is connected and fixed to the fins 62, and both ends of the water-cooling pipe 61 pass through the pre-cooling box 2 and the electrical cabinet shell 1 and extend to the outside.

[0029] Specifically, the cooling water supplied by the external water chiller circulates within the water-cooling pipe 61. The cooling water transfers its cooling capacity to the fins 62 through the pipe wall of the water-cooling pipe 61. The fins 62 increase the heat exchange area with the air, thereby efficiently cooling the air flowing through the radiator 6.

[0030] Reference Figure 5 The air inlet component 8 includes an air inlet pipe 81 rotatably connected to the fixed pipe 7, and a fan blade 82 is fixedly installed inside the air inlet pipe 81; the output shaft of the dual-shaft motor 11 extends movably through to the outside of the partition 9 and is fixedly connected to the drive gear 12; a gear ring 13 is fixedly connected to the inner wall of the air inlet pipe 81, and the gear ring 13 meshes with the corresponding drive gear 12.

[0031] Specifically, when the dual-shaft motor 11 starts, the output shafts on both sides drive the corresponding drive gears 12 to rotate. The drive gears 12 drive the air inlet pipe 81 and the fan blades 82 to rotate through the gear ring 13 that meshes with them, thereby generating negative pressure at both ends of the fixed pipe 7, drawing the air pre-cooled by the radiator 6 into the fixed pipe 7.

[0032] Reference Figure 8 The transmission component 14 includes a second gear ring 141, which is fixedly installed on the outer wall of one of the air inlet pipes 81. A gear shaft 142 is meshed with one side of the second gear ring 141, and the gear shaft 142 is rotatably connected to the isolation cover 4. A third gear ring 143 is meshed with the other end of the gear shaft 142, and the third gear ring 143 is fixedly installed on the filter component 5.

[0033] Specifically, when the air inlet duct 81 rotates, the gear ring 141 fixed to its outer wall rotates accordingly. Through the transmission of the gear shaft 142, the gear ring 143 rotates, which in turn drives the filter element 5 to rotate. Thus, the filter element 5 can slowly rotate while filtering the air, continuously switching the area of ​​the filter screen 52 opposite to the through hole, preventing dust from continuously accumulating in a certain area of ​​the filter screen 52, thereby reducing the frequency of manual maintenance.

[0034] Among them, the gear shaft 142 includes a connecting shaft, which is rotatably mounted on the isolation cover 4. A drive gear and a face gear are fixedly connected to both ends of the connecting shaft, respectively. The face gear meshes with the second gear ring 141, and the drive gear meshes with the third gear ring 143.

[0035] Example 2, refer to Figure 7 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: multiple air guide plates 16 are provided on both the upper and lower sides of the dual-axis motor 11. The air guide plates 16 have a bent structure. Multiple air guide plates 17 are fixedly connected to the port of the fixing pipe 7 facing the isolation cover 4. The air guide plates 17 are connected and fixed to the corresponding air guide plates 16.

[0036] Specifically, the bend of the first air guide plate 16 has an arc transition. The first air guide plate 16 and the second air guide plate 17 together form an air guide channel to effectively guide the pre-cooling airflow around the dual-axis motor 11, reduce airflow turbulence, and enable the airflow to move along the surface of the dual-axis motor 11 to carry away heat. Then, the airflow continues to flow towards the filter element 5 after being guided and turned by the first air guide plate 16, and is blown towards the filter element 5 after being guided by the second air guide plate 17.

[0037] Understandably, a heat-insulating film is pasted on the side wall of the partition 9 facing the dual-axis motor 11 to block the heat of the dual-axis motor 11 from passing through the partition 9.

[0038] Reference Figure 9 The outer wall of the fixed pipe 7 is provided with an arc plate 18, and an air outlet 2 is opened on the arc plate 18. The size of the air outlet 2 is smaller than that of the air outlet 1. Multiple guide plates 19 are fixedly connected to the air outlet 2. Adjustment holes are opened at both ends of the arc plate 18, and bolts 15 are installed in the adjustment holes. The bolts 15 are threadedly connected to the fixed pipe 7.

[0039] Specifically, by loosening bolt 15, the circumferential position of the arc-shaped plate 18 on the outer wall of the fixed pipe 7 can be adjusted, thereby changing the orientation and airflow direction of the second air outlet. As an auxiliary air outlet structure, the second air outlet can guide a portion of the pre-cooled airflow to specific heat-generating elements for targeted cooling, based on the heat dissipation needs of different areas inside the electrical cabinet housing 1, thus achieving zoned heat dissipation. The remaining structure is the same as in Embodiment 1.

[0040] Based on embodiments 1-2, the working principle of this invention is as follows: Outside air enters the isolation cover 4 through the lower through-hole, passes through the filter screen 52, and then enters the pre-cooling chamber 2. An external water chiller provides circulating cooling water to the water-cooling pipe 61. The cooling water flows within the water-cooling pipe 61 and exchanges heat with the air inside the pre-cooling chamber 2 through the fins 62, pre-cooling the air. The dual-shaft motor 11 starts, and through the meshing of the drive gear 12 and gear ring 13, drives the air inlet pipes 81 and fan blades 82 at both ends of the fixed pipe 7 to rotate, drawing the pre-cooled air from the pre-cooling chamber 2 into the fixed pipe 7 after it has been pre-cooled by the radiator 6. Simultaneously, when one of the air inlet pipes 81 rotates, it drives the filter element 5 to rotate slowly through the transmission component 14, causing different areas of the filter screen 52 to alternately face the upper through-hole. The pre-cooled airflow entering the fixed pipe 7 is split by the baffle 9. Most of the airflow is discharged through the air outlet and is precisely blown towards the heat-generating electrical components by the arc plate 18 and the guide plate 19. A small part of the airflow passes through the air inlet 10 and flows along the surface of the dual-axis motor 11, carrying away the heat of the dual-axis motor 11 and then passing through the filter element 5, blowing away the dust and debris intercepted on the outer surface of the filter screen 52.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A water-cooled and air-cooled composite heat dissipation device for an electrical cabinet of a laser cutting machine, comprising an electrical cabinet housing (1), wherein a pre-cooling box (2) is fixedly installed on one inner side wall of the electrical cabinet housing (1), characterized in that, An isolation cover (4) is fixedly connected to one of the inner walls of the precooling box (2). A circular filter element (5) is rotatably connected inside the isolation cover (4). Two vertically arranged through holes (1) are opened on the side wall of the precooling box (2) corresponding to the filter element (5). A through hole (2) is opened at the lower end of the isolation cover (4) corresponding to one of the through holes (1). A radiator (6) is provided in the lower part of the precooling box (2). The radiator (6) is connected to an external water chiller. A T-shaped fixed pipe (7) is provided above the radiator (6). The fixed pipe (7) is fixedly connected to the isolation cover (4). The fixed tube (7) is provided with air inlet components (8) at both ends symmetrically. A trapezoidal partition (9) is fixedly connected inside the fixed tube (7). An air inlet (10) is opened on the side of the partition (9) facing the air inlet component (8). A dual-axis motor (11) is fixedly installed inside the partition (9). The dual-axis motor (11) is used to drive the air inlet component (8) to rotate. A transmission component (14) is connected between one of the air inlet components (8) and the filter component (5). An air outlet is opened in the middle of the fixed tube (7). A through hole is opened on the side of the precooling box (2) corresponding to the air outlet.

2. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 1, characterized in that, The filter element (5) includes a rotating frame (51), on the side of the rotating frame (51) away from the isolation cover (4) a filter screen (52) is fixedly connected, and the rotating frame (51) is rotatably connected to the isolation cover (4).

3. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 1, characterized in that, A protective net (3) is fixedly installed inside the through hole.

4. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 1, characterized in that, The cooling unit (6) includes a water cooling pipe (61) and multiple fins (62) arranged linearly and at equal intervals. The water cooling pipe (61) is connected and fixed to the fins (62), and both ends of the water cooling pipe (61) pass through the precooling box (2) and the electrical cabinet shell (1) and extend to the outside.

5. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 1, characterized in that, The air inlet component (8) includes an air inlet pipe (81) rotatably connected to the fixed pipe (7), and a fan blade (82) is fixedly installed inside the air inlet pipe (81). The output shaft of the dual-axis motor (11) extends through the outside of the partition (9) and is fixedly connected to the drive gear (12). The inner wall of the air inlet pipe (81) is fixedly connected to the gear ring (13), which meshes with the corresponding drive gear (12).

6. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 5, characterized in that, The transmission component (14) includes a second gear ring (141), which is fixedly installed on the outer wall of one of the air inlet pipes (81). A gear shaft (142) is meshed on one side of the second gear ring (141), and the gear shaft (142) is rotatably connected to the isolation cover (4). A third gear ring (143) is meshed on the other end of the gear shaft (142), and the third gear ring (143) is fixedly installed on the filter element (5).

7. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 1, characterized in that, The dual-axis motor (11) is provided with multiple air guide plates (16) on both the upper and lower sides. The air guide plates (16) are bent. Multiple air guide plates (17) are fixedly connected to the port of the fixed pipe (7) facing the isolation cover (4). The air guide plates (17) are connected and fixed to the corresponding air guide plates (16).

8. The water-cooled and air-cooled composite heat dissipation device for the electrical cabinet of a laser cutting machine according to claim 1, characterized in that, The outer wall of the fixed tube (7) is provided with an arc plate (18), and an air outlet 2 is provided on the arc plate (18). The size of the air outlet 2 is smaller than that of the air outlet 1. Multiple guide plates (19) are fixedly connected to the air outlet 2. The arc plate (18) has adjustment holes at both symmetrical ends, and bolts (15) are installed in the adjustment holes. The bolts (15) are threadedly connected to the fixing pipe (7).

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