Heat dissipation device of PWM (Pulse Width Modulation) rectifier

Abstract

The utility model relates to the field of heat dissipation of PWM rectifiers, in particular to a heat dissipation device of a PWM rectifier, which comprises a water-cooling circulation mechanism and the like. The water-cooling circulation mechanism is composed of a plurality of bent heat dissipation elbows, a heat conduction pipe, a water pump, a heat dissipation fan and the like. Compared with the prior art, the device has the advantages that a set of water-cooling circulation system is arranged in the PWM rectifier equipment box, and the heat conduction pipes are closely attached to electronic elements in the system mechanism, so that the heat dissipation efficiency of the electronic elements is enhanced; according to the water cooling system, the heat dissipation pipe body for heat dissipation and cold return of the water cooling system is arranged to be in a multi-set bent shape, the cold return efficiency is improved, and under addition of the arrangement, heat dissipation of PWM rectifier equipment is more effective, and the PWM rectifier equipment can be maintained in a relatively low-temperature and efficient operation environment for a long time.

Description

Technical Field

[0001] The utility model relates to the field of PWM rectifier heat dissipation, in particular to a PWM rectifier heat dissipation device. Background Art

[0002] PWM rectifier (Pulse Width Modulation Rectifier) ​​is a power electronic device used to convert AC power into DC power. It adjusts the output DC voltage by adjusting the on-time ratio of the switching device. PWM rectifier has the advantages of high efficiency, precise voltage regulation capability and low harmonic distortion. It is widely used in frequency converters, electric vehicle chargers, renewable energy systems and other fields.

[0003] PWM rectifiers are generally installed in equipment boxes, which are composed of a large number of electronic control components. The operation of electronic components will generate a lot of heat, and their operating efficiency requires a low-temperature environment to ensure that they are efficient. It is necessary to equip the equipment box with a heat dissipation mechanism to continuously cool it down. Generally, the heat dissipation components are only equipped with a simple exhaust fan, and the heat dissipation effect is limited. When the equipment runs for a long time, the huge heat in the enclosed space will inevitably lead to a decrease in the heat dissipation effect, affecting the normal use of the PWM rectifier. For this purpose, a PWM rectifier heat dissipation device is provided. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] The technical problem to be solved by the utility model is that the traditional heat dissipation measure of only providing a simple exhaust fan provides a limited heat dissipation effect, which is not conducive to the normal operation of the PWM rectifier.

[0006] 2. Technical Solution

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: a PWM rectifier heat dissipation device, including an equipment box, a controller is connected inside the equipment box, an operation panel matching with the controller is connected outside one side of the equipment box, a plurality of exhaust ports are connected to the top of the equipment box, a transmission shaft is rotatably connected inside the exhaust port, a plurality of spiral blades are connected to one end of the transmission shaft, and air inlets matching with the exhaust ports are connected to both sides of one end of the equipment box.

[0008] A cooling pipe and a return pipe are respectively connected to both sides of the end of the controller away from the operation panel in the equipment box. The upper and lower ends of the cooling pipe are connected to a water pipe 1, and the upper and lower ends of the return pipe are connected to a water pipe 2. A plurality of temperature conducting pipes that cooperate with the controller are commonly connected between the water pipe 1 and the water pipe 2. A plurality of heat dissipation bent pipes are commonly connected between the temperature conducting pipe and the return pipe away from the controller. The exhaust port is arranged above the heat dissipation bent pipe, and the air inlet is arranged on both sides of the heat dissipation bent pipe.

[0009] Furthermore, a reducer is commonly connected between the cooling pipe and the water pipe one and between the return pipe and the water pipe two. The water pipe one is connected with a water pump to facilitate the movement of the coolant in the cooling circulation system network composed of the temperature conducting pipe, the return pipe, the cooling pipe and the heat dissipation elbow pipe, thereby facilitating the heat dissipation of the PWM rectifier.

[0010] Furthermore, a plurality of motors cooperating with the transmission shaft are connected above the equipment box to provide power for the rotation of the transmission shaft.

[0011] Furthermore, the equipment box is connected to the outside of the air inlet with a slide groove to facilitate the storage and support of the mesh board. The equipment box is connected to the inside of the slide groove with a mesh board that cooperates with the air inlet to prevent dust from entering the equipment box through the air inlet and causing accumulation to affect heat dissipation. A pull ring is connected to one end of the mesh board to facilitate manual pulling out of the mesh board for replacement and cleaning.

[0012] Furthermore, the equipment box is connected with a plurality of pipe racks matched with the heat dissipation bent pipes to provide support for the heat dissipation bent pipes in the equipment box, and the equipment box is connected with a plurality of brackets matched with the temperature conducting pipes and the controller to provide support for the temperature conducting pipes in the equipment box.

[0013] 3. Beneficial Effects

[0014] The advantages of the utility model compared with the prior art are that: the device is provided with a water cooling circulation system in the PWM rectifier equipment box, the system mechanism focuses on placing the temperature conducting pipes close to the electronic components to enhance the efficiency of heat dissipation of the electronic components, and the heat dissipation pipe body of the water cooling system itself for heat dissipation and cooling back is set to a plurality of groups of curved shapes to improve the cooling back efficiency. With the addition of the above-mentioned settings, the heat dissipation of the PWM rectifier equipment is more effective, and can be maintained in a relatively low temperature and high-efficiency operating environment for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the appearance structure of a PWM rectifier heat dissipation device.

[0016] Figure 2 This is a schematic diagram of the internal structure of a PWM rectifier heat sink of the utility model. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the internal structure of a PWM rectifier heat sink of the utility model. Figure 2 .

[0018] Figure 4 yes Figure 1 Schematic diagram of the local structure.

[0019] Figure 5 yes Figure 2 Schematic diagram of the local structure.

[0020] Figure 6 yes Figure 3 Schematic diagram of the structure of part A.

[0021] As shown in the figure: 1. Equipment box, 2. Controller, 3. Operation panel, 4. Temperature conduction pipe, 5. Cooling pipe, 6. Water pipe 1, 7. Reflux pipe, 8. Water pipe 2, 9. Reducer, 10. Water pump, 11. Heat dissipation elbow, 12. Exhaust port, 13. Drive shaft, 14. Spiral blade, 15. Motor, 16. Air inlet, 17. Mesh plate, 18. Slide, 19. Pull ring, 20. Pipe rack, 21. Bracket. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] Combined with Figure 1-6 In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a PWM rectifier heat dissipation device, comprising an equipment box 1, a controller 2 is connected inside the equipment box 1, an operation panel 3 matched with the controller 2 is connected to the outside of one side of the equipment box 1, a plurality of exhaust ports 12 are connected to the top of the equipment box 1, a transmission shaft 13 is rotatably connected inside the exhaust port 12, a plurality of motors 15 matched with the transmission shaft 13 are connected above the equipment box 1 to provide power for the rotation of the transmission shaft 13, and one end of the transmission shaft 13 is connected to the top of the equipment box 1. A plurality of spiral blades 14 are connected, and air inlets 16 matching the exhaust ports 12 are connected on both sides of one end of the equipment box 1. A slide groove 18 is connected on the outside of the air inlet 16 to facilitate the storage and support of the mesh plate 17. The equipment box 1 is located in the slide groove 18 and is connected to a mesh plate 17 matching the air inlet 16 to prevent dust from entering the equipment box 1 through the air inlet 16, causing accumulation and affecting heat dissipation. A pull ring 19 is connected at one end of the mesh plate 17 to facilitate manual pulling out of the mesh plate 17 for replacement and cleaning.

[0025] The spiral blades 14 are driven to rotate by the transmission shaft 13 to exhaust the hot air in the equipment box 1, which is similar to the exhaust fan structure set in the traditional PWM rectifier equipment box 1. However, the difference is that the exhaust fan function of the traditional PWM rectifier equipment box 1 is to directly exhaust the heat emitted by its internal electronic control components, while the exhaust fan structure in the device is mainly used to cool down the multiple heat dissipation elbows 11 in the cooling system, so that the coolant inside it returns to a low-temperature state, and continues to cool and dissipate heat for the controller 2.

[0026] Embodiment 2

[0027] Combined with Figure 2-3 , the equipment box 1 is located at the controller 2 at one end away from the operation panel 3, and the two sides are respectively connected with a cooling pipe 5 and a return pipe 7. The upper and lower ends of the cooling pipe 5 are connected with a water pipe 1 6, and the upper and lower ends of the return pipe 7 are connected with a water pipe 2 8. A reducer 9 is commonly connected between the cooling pipe 5 and the water pipe 1 6 and between the return pipe 7 and the water pipe 2 8. A water pump 10 is connected to the water pipe 1 6 to facilitate the movement of the coolant in the cooling circulation system network composed of the temperature conducting pipe 4, the return pipe 7, the cooling pipe 5 and the heat dissipation elbow 11, so as to facilitate the heat dissipation of the PWM rectifier. A plurality of heat-conducting pipes 4 cooperating with the controller 2 are commonly connected between 6 and the water supply pipe 2 8, a plurality of brackets 21 cooperating with the heat-conducting pipes 4 and the controller 2 are connected in the equipment box 1, and support is provided for the heat-conducting pipes 4 in the equipment box 1, a plurality of heat-dissipating elbows 11 are commonly connected between the heat-conducting pipes 4 and the side of the return pipe 7 away from the controller 2, a plurality of pipe racks 20 cooperating with the heat-dissipating elbows 11 are connected in the equipment box 1, and support is provided for the heat-dissipating elbows 11 in the equipment box 1, the exhaust port 12 is arranged above the heat-dissipating elbow 11, and the air inlet 16 is arranged on both sides of the heat-dissipating elbow 11.

[0028] By placing the temperature conducting tube 4 and the controller 2 close to each other, the controller 2 can be quickly cooled down by the coolant below normal temperature, thereby providing a more efficient operating environment for the controller. The coolant whose temperature is relatively increased after use can be distributed in a large number of small heat dissipation elbows 11 through the water supply pipe 8 and the return pipe 7. The contact area between the coolant and the external environment can be expanded, thereby allowing the coolant to recover to a low temperature state more quickly. After the cooling is completed, the coolant is again transported toward the controller 2 through the cooling pipe 5 and circulated under the action of the water pump 10.

[0029] In the specific implementation of the utility model, when the heat dissipation device is running in the PWM rectifier equipment, under the action of the water pump 10, the low-temperature coolant in the cooling pipe 5 is transported to each temperature-conducting pipe 4 outside the controller 2 through the water delivery pipe 1 6, and heat is exchanged with the controller 2, thereby cooling the operating environment of the PWM rectifier. The coolant is constantly circulating in the cooling system. The temperature of the coolant itself rises slightly after use, and enters each heat dissipation elbow 11 through the water delivery pipe 2 8 and the return pipe 7. The heat dissipation fan at the upper exhaust port 12 and the air inlet 16 on both sides act Under the condition, the air with relatively low outside temperature forms an airflow around the heat dissipation elbow 11, and the circulating air forms cold wind, which takes away the heat of the coolant in the heat dissipation elbow 11, thereby restoring it to a relatively low temperature state, and continues to provide cooling supply for the controller 2 as the cooling pipe 5, thereby achieving fast and effective heat dissipation processing. The mesh plate 17 on the outside of the air inlet 16 is used to block dust from entering the equipment box 1, and it can be removed for cleaning or replacement during the period to prevent excessive dust accumulation, causing blockage of the air inlet 16, and thus affecting the heat dissipation effect of the device.

[0030] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A PWM rectifier heat dissipation device, comprising an equipment box (1), wherein a controller (2) is connected inside the equipment box (1), an operation panel (3) matched with the controller (2) is connected to the outside of one side of the equipment box (1), a plurality of exhaust ports (12) are connected to the top of the equipment box (1), a transmission shaft (13) is rotatably connected inside the exhaust port (12), a plurality of spiral blades (14) are connected to one end of the transmission shaft (13), and air inlets (16) matched with the exhaust ports (12) are connected to both sides of one end of the equipment box (1), characterized in that: A cooling pipe (5) and a return pipe (7) are respectively connected to both sides of an end of the controller (2) away from the operation panel (3) in the equipment box (1); a water pipe (6) is connected to the upper and lower ends of the cooling pipe (5); a water pipe (8) is connected to the upper and lower ends of the return pipe (7); a plurality of heat conducting pipes (4) matching the controller (2) are connected between the water pipe (6) and the water pipe (8); a plurality of heat dissipation curved pipes (11) are connected between the heat conducting pipe (4) and the return pipe (7) on the side away from the controller (2); the exhaust port (12) is arranged above the heat dissipation curved pipe (11); and the air inlet (16) is arranged on both sides of the heat dissipation curved pipe (11).

2. A PWM rectifier heat sink according to claim 1, characterized in that: A reducer (9) is provided between the cooling pipe (5) and the first water pipe (6) and between the return pipe (7) and the second water pipe (8), and a water pump (10) is connected to the first water pipe (6).

3. The PWM rectifier heat sink according to claim 1, characterized in that: A plurality of motors (15) matched with the transmission shafts (13) are connected to the upper side of the equipment box (1).

4. The PWM rectifier heat sink according to claim 1, characterized in that: The equipment box (1) is located outside the air inlet (16) and is connected to a slide groove (18); the equipment box (1) is located inside the slide groove (18) and is connected to a mesh plate (17) that matches the air inlet (16); one end of the mesh plate (17) is connected to a pull ring (19).

5. The PWM rectifier heat sink according to claim 1, characterized in that: The equipment box (1) is connected to a plurality of pipe racks (20) matched with the heat dissipation bent pipes (11), and the equipment box (1) is connected to a plurality of brackets (21) matched with the temperature conducting pipes (4) and the controller (2).

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