Ventilation cooling device applied to frequency converter

Abstract

This application belongs to the field of cooling and heat dissipation technology, specifically relating to a ventilation and cooling device applied to a frequency converter, including a first chassis and a cooling assembly; the first chassis is used to install the frequency converter body; the cooling assembly includes a water tank, a water pump, a first fan, spray heads, heat exchange pipes, and a second fan. The heat exchange pipes are disposed inside the first chassis and are connected at both ends to the outlet of the water pump and the spray heads, respectively. The inlet of the water pump is connected to the water tank. The water pump draws cooling water from the water tank, which flows through the heat exchange pipes to the spray heads and then back to the water tank. The air blown by the first fan is directed downwards towards the spray heads, and the air blown by the second fan is directed towards the heat exchange pipes. The cooling water flowing out from the heat exchange pipes through the cooling assembly is sprayed into the water tank like rain through the spray heads. During this process, the cooling water that is distributed and sprayed falls into the air has a larger contact area with the air. Combined with the air blowing by the first fan, the temperature of the cooling water falling into the water tank is kept low, preventing the problem of the water temperature gradually rising and failing to perform heat exchange.

Description

Technical Field

[0001] This application belongs to the field of cooling and heat dissipation technology, specifically relating to a ventilation and cooling device applied to frequency converters. Background Technology

[0002] With the continuous improvement of industrial automation, frequency converters have been widely used. However, frequency converters inevitably encounter high temperature problems during use, so heat dissipation is crucial for frequency converters, otherwise the service life of frequency converters will be severely reduced.

[0003] Chinese Patent Publication No. CN210129822U discloses a ventilation and cooling device for frequency converters. It uses an induced draft fan in conjunction with a semiconductor cooling chip, and also uses a cooling water pipe and a water pump to achieve heat exchange to assist the frequency converter in heat dissipation. Although it has a certain ventilation and cooling effect, there are still some shortcomings in actual use. For example, when the water tank, water pump and cooling water pipe are continuously circulating water for heat exchange, the water temperature will gradually rise because it cannot dissipate in time, resulting in poor cooling and heat dissipation effect. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a ventilation and cooling device for frequency converters, which solves the problem that the temperature of the cooling water in the prior art will gradually rise because it cannot dissipate in time, thereby improving the cooling and heat dissipation effect.

[0005] This application provides a ventilation and cooling device for use in frequency converters, comprising:

[0006] The first chassis is used to install the inverter body;

[0007] The cooling assembly includes a water tank, a water pump, a first fan, a spray head, a heat exchange tube, and a second fan. The heat exchange tube is installed inside a first chassis and its two ends are connected to the outlet of the water pump and the spray head, respectively. The inlet of the water pump is connected to the water tank. The water pump draws cooling water from the water tank, which flows through the heat exchange tube to the spray head and then back to the water tank. The air blown by the first fan is directed downwards towards the spray head, and the air blown by the second fan is directed towards the heat exchange tube.

[0008] Optionally, the heat exchange tube is disposed at the inner top of the first chassis and above the inverter body, and the second fan is disposed through the top of the first chassis.

[0009] Optionally, the inlet and outlet of the heat exchange tube are respectively connected to an inlet pipe and a return pipe, and the inlet pipe and the return pipe extend along both sides of the inverter body and are respectively connected to a water pump and a spray head.

[0010] Optionally, the ventilation and cooling device further includes a second housing, in which the water tank, water pump, first fan and spray head are disposed, and the second housing has a second air inlet and a second air outlet on its two side walls respectively.

[0011] Optionally, the second chassis is located at the bottom of the first chassis, and the inlet pipe and return pipe extend through into the second chassis.

[0012] Optionally, the first chassis has a first air outlet near the bottom on its side wall, a first air inlet on its top, and the second fan is located at the first air inlet.

[0013] Optionally, filters are provided on the first air outlet, the second air inlet, and the second air outlet.

[0014] Optionally, the ventilation and cooling device further includes a protective cover disposed on the top of the first chassis, the protective cover having a third air inlet on its side wall.

[0015] Optionally, a filter screen is provided on the third air inlet.

[0016] Optionally, the front of the first chassis is provided with a transparent viewing window.

[0017] Optionally, the heat exchange tube includes at least one of spiral coil and serpentine tube.

[0018] The beneficial effects of this application are that the ventilation and cooling device provided for frequency converters uses cooling water flowing from the heat exchange tubes in the cooling assembly to be sprayed into the water tank like rain through spray heads. During this process, the sprayed cooling water has a larger contact area with the air as it falls, and combined with the airflow from the first fan, the water returning to the tank remains in a cool state for reuse, preventing the problem of water temperature gradually rising and hindering heat exchange. Furthermore, the air blown out by the second fan can reach an even lower temperature after passing through the heat exchange tubes, providing ventilation and cooling for the frequency converter body, further improving the cooling effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the ventilation and cooling device provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the internal structure of the ventilation and cooling device provided in the embodiments of this application;

[0021] Figure 3 A schematic diagram of the combined structure of the first chassis, the second chassis, and the protective cover provided in this application embodiment;

[0022] Figure 4This is an exploded structural diagram of the cooling assembly provided in an embodiment of this application.

[0023] In the diagram: 1.1 Inverter body; 100 First chassis; 110 First air inlet; 120 First air outlet; 130 Transparent observation window; 200 Cooling assembly; 210 Water tank; 220 Water pump; 230 First fan; 240 Spray head; 250 Heat exchange tube; 260 Second fan; 270 Liquid inlet pipe; 280 Return pipe; 300 Second chassis; 310 Second air inlet; 320 Second air outlet; 400 Protective cover; 410 Third air inlet; 500 Filter screen. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] like Figure 1-4 As shown, this application provides a ventilation and cooling device for a frequency converter, comprising: a first chassis 100 and a cooling assembly 200; wherein, the first chassis 100 is used to install the frequency converter body 1.1; the cooling assembly 200 includes a water tank 210, a water pump 220, a first fan 230, a spray head 240, a heat exchange tube 250 and a second fan 260, the heat exchange tube 250 is disposed in the first chassis 100 and its two ends are respectively connected to the outlet of the water pump 220 and the spray head 240, the inlet of the water pump 220 is connected to the water tank 210, the water pump 220 draws cooling water from the water tank 210 and flows through the heat exchange tube 250 to the spray head 240 and back to the water tank 210, the air blown out by the first fan 230 is directed towards the lower part of the spray head 240, and the air blown out by the second fan 260 is directed towards the heat exchange tube 250.

[0026] Compared with existing technologies, the ventilation and cooling device for frequency converters provided in this application uses cooling water flowing from the heat exchange tube 250 in the cooling assembly 200, which is sprayed into the water tank 210 like rain through the spray head 240. During this process, the cooling water that is distributed and sprayed into the air has a larger contact area with the air. At the same time, with the air blowing from the first fan 230, the water that falls back into the water tank 210 is always kept in a cold state for reuse, and the problem of water temperature gradually rising and failing to perform heat exchange is avoided. In addition, the air blown out by the second fan 260 can be even cooler after passing through the heat exchange tube 250, which provides ventilation and cooling heat dissipation to the frequency converter body 1.1, further improving the cooling and heat dissipation effect.

[0027] In one possible implementation, the heat exchange tube 250 is disposed inside the top of the first chassis 100 and above the inverter body 1.1, and the second fan 260 is disposed through the top of the first chassis 100. Specifically, since high temperature tends to rise, better thermal convection occurs between the heat exchange tube 250 and the cool air blown by the lower temperature second fan 260 above, which helps to improve the cooling effect.

[0028] In one possible implementation, the inlet and outlet of the heat exchange tube 250 are connected to an inlet pipe 270 and a return pipe 280, respectively. The inlet pipe 270 and the return pipe 280 extend along both sides of the inverter body 1.1 and are connected to the water pump 220 and the spray head 240, respectively. Specifically, the inlet pipe 270 and the return pipe 280 are distributed on both sides of the inverter body 1.1, which will not obstruct the installation and removal of the inverter body 1.1, and at the same time, they can absorb heat from both sides.

[0029] In one possible implementation, such as Figure 2 As shown, the ventilation and cooling device also includes a second housing 300. A water tank 210, a water pump 220, a first fan 230, and a spray head 240 are disposed within the second housing 300. The second housing 300 has a second air inlet 310 and a second air outlet 320 on each of its two side walls. Specifically, the second housing 300 protects the water tank 210, water pump 220, first fan 230, and spray head 240. This prevents excessive dust and large debris from falling into the water tank 210 and causing blockage of the water pump 220 inlet; it also prevents large foreign objects from colliding with the equipment inside the second housing 300. The first fan 230 can be disposed inside the second housing 300 or on the inner wall of the second housing 300 at the second air inlet 310. Air enters through the second air inlet 310 and exits through the second air outlet 320.

[0030] In one possible implementation, the second chassis 300 is located at the bottom of the first chassis 100, with the inlet pipe 270 and return pipe 280 extending through it into the second chassis 300. Specifically, the second chassis 300 and the first chassis 100 can be fixed together by bolts or welding. The top of the second chassis 300 and the bottom of the first chassis 100 can share a single structural plate to reduce material usage and allow for integral manufacturing. Since the second chassis 300 is located at the bottom of the first chassis 100, the temperature inside the second chassis 300 is less affected by the inverter body 1.1, helping to maintain a relatively low temperature. This also reduces the number of bends in the inlet pipe 270 and return pipe 280, improving installation convenience. Furthermore, raising the first chassis 100 reduces the risk of the inverter body 1.1 being flooded.

[0031] In one possible implementation, the first chassis 100 has a first air outlet 120 near the bottom on its side wall, and a first air inlet 110 on its top. The second fan 260 is positioned at the first air inlet 110. Specifically, by designing the first air outlet 120 near the bottom, the air blown by the second fan first passes through the entire internal cavity of the first chassis 100 from the top, which helps to improve the cooling effect.

[0032] In one possible implementation, filters 500 are provided on the first air outlet 120, the second air inlet 310, and the second air outlet 320. This reduces the amount of dust and debris entering the first housing 100 and the second housing 300.

[0033] In one possible implementation, the ventilation and cooling device further includes a protective cover 400 disposed on the top of the first chassis 100, and the protective cover 400 has a third air inlet 410 on its side wall. Specifically, the protective cover 400 can be fixed to the top of the first chassis 100 by bolts or welding, and serves to protect the second fan 260. Under the action of the external second fan 260, air enters the protective cover 400 through the third air inlet 410 and then enters the first chassis 100.

[0034] In one possible implementation, a filter 500 is provided on the third air inlet 410. This reduces the entry of dust and debris into the protective cover 400, thereby preventing them from entering the first chassis 100.

[0035] In one possible implementation, a transparent observation window 130 is provided on the front of the first chassis 100. Specifically, the front of the first chassis 100 has a corresponding opening, and the transparent observation window 130 can be connected to the front of the first chassis 100 by a hinge and can be easily opened and closed by a corresponding lock; the transparent observation window 130 can also be fixed to the front of the first chassis 100 by screws, which has a high degree of sealing.

[0036] In one possible implementation, the heat exchange tube 250 includes at least one of a spiral coil and a serpentine tube. Specifically, the heat exchange tube 250 can be a single spiral coil, with the tube wound in a spiral shape, resulting in a compact structure suitable for space-constrained applications and enhancing fluid turbulence to improve heat transfer efficiency; or, the heat exchange tube 250 can be a single serpentine tube, connected by multiple bends to form a serpentine path, extending fluid residence time and improving heat transfer efficiency; or, a combination of a spiral coil and a serpentine tube, combining the advantages of both.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0038] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A ventilation and cooling device applied to a frequency converter, characterized in that, include: The first chassis (100) is used to install the inverter body (1.1). The cooling assembly (200) includes a water tank (210), a water pump (220), a first fan (230), a spray head (240), a heat exchange tube (250), and a second fan (260). The heat exchange tube (250) is located inside the first chassis (100) and its two ends are respectively connected to the outlet of the water pump (220) and the spray head (240). The inlet of the water pump (220) is connected to the water tank (210). The water pump (220) draws cooling water from the water tank (210) through the heat exchange tube (250) to the spray head (240) and then returns to the water tank (210). The air blown out by the first fan (230) is directed towards the bottom of the spray head (240), and the air blown out by the second fan (260) is directed towards the heat exchange tube (250).

2. The ventilation and cooling device according to claim 1, characterized in that, The heat exchange tube (250) is located at the top inside the first chassis (100) and above the inverter body (1.1), and the second fan (260) is installed through the top of the first chassis (100).

3. The ventilation and cooling device according to claim 2, characterized in that, The inlet and outlet of the heat exchange tube (250) are respectively connected to the liquid inlet pipe (270) and the return pipe (280). The liquid inlet pipe (270) and the return pipe (280) extend along both sides of the inverter body (1.1) and are respectively connected to the water pump (220) and the spray head (240).

4. The ventilation and cooling device according to claim 3, characterized in that, It also includes a second chassis (300), in which the water tank (210), water pump (220), first fan (230) and spray head (240) are disposed. The second chassis (300) has a second air inlet (310) and a second air outlet (320) on its two side walls respectively.

5. The ventilation and cooling device according to claim 4, characterized in that, The second housing (300) is located at the bottom of the first housing (100), and the inlet pipe (270) and return pipe (280) extend through into the second housing (300); And / or, the first chassis (100) has a first air outlet (120) near the bottom on the side wall, and the first chassis (100) has a first air inlet (110) on the top, and the second fan (260) is disposed at the first air inlet (110).

6. The ventilation and cooling device according to claim 5, characterized in that, A filter screen (500) is provided on the first air outlet (120), the second air inlet (310), and the second air outlet (320).

7. The ventilation and cooling device according to any one of claims 1-6, characterized in that, It also includes a protective cover (400) disposed on the top of the first chassis (100), the protective cover (400) having a third air inlet (410) on its side wall.

8. The ventilation and cooling device according to claim 7, characterized in that, A filter (500) is provided on the third air inlet (410).

9. The ventilation and cooling device according to any one of claims 1-6, characterized in that, The first chassis (100) has a transparent viewing window (130) on the front.

10. The ventilation and cooling device according to any one of claims 1-6, characterized in that, The heat exchange tube (250) includes at least one of spiral coil and serpentine tube.

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