Generator set frequency converter heat radiation structure

Abstract

The invention relates to the technical field of frequency converter heat dissipation, and discloses a generator set frequency converter heat dissipation structure which comprises a cabinet body, a sealing seat arranged at the top of the cabinet body, a detachable sealing cover arranged at the top of the sealing seat, a first convection window arranged at the top of the inner side wall of the cabinet body, and a second convection window arranged at the bottom of the inner side wall of the cabinet body. A detachable water-cooling heat exchanger or an air-cooling heat exchanger is arranged on the outer side wall of the cabinet body, a first convection cavity and a second convection cavity are formed in the positions, facing the outer side wall of the cabinet body, of the water-cooling heat exchanger and the air-cooling heat exchanger respectively, and the first convection window and the second convection window are communicated through the first convection cavity and the second convection cavity. Compared with the prior art, the device has the advantages that the internal heat transfer medium does not need extra power, the heat dissipation efficiency is high, contact with cooling water can be avoided, the air tightness is good, invasion of salt mist or dust is reduced, fluorinated liquid is allowed to serve as the internal heat transfer medium, and the phase change latent heat of the fluorinated liquid can be used for coping with high-temperature transient loads.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converter heat dissipation, and specifically refers to a heat dissipation structure for a frequency converter of a generator set. Background Art

[0002] When a generator operates, it needs the cooperation of a frequency converter to convert the frequency of the alternating current output by the generator to specific parameters for grid connection and transmission. When the frequency converter operates, its internal components, such as IGBT modules, will continuously generate heat, and a special heat dissipation device is required to maintain each component of the frequency converter at an appropriate temperature to ensure normal operation for a long time.

[0003] Currently, common frequency converter radiators can be divided into air-cooled type, water-cooled type or hybrid type.

[0004] For air-cooled heat dissipation, it requires air flow to contact the frequency converter components to take away heat. However, for offshore generators or diesel generators used in mines, the air in these working environments will contain salt spray, dust or flammable and explosive gases. Exposing the frequency converter components to such air flow will significantly reduce the device life and pose safety hazards.

[0005] For water-cooled heat dissipation, it is necessary to install a water-cooled heat exchanger on the components and connect the circulating water pipeline. After long-term use of the circulating water pipeline, leakage is inevitable, which is likely to cause fatal damage to the frequency converter components.

[0006] In addition, for wind power generation and engine power generation, such power generation devices usually have difficulty maintaining a stable speed during operation, resulting in easy generation of transient loads on the frequency converter during operation. The air-cooled and water-cooled heat transfer of existing frequency converter radiators is difficult to cope with transient loads. Summary of the Invention

[0007] The technical problem to be solved by the present invention is that the existing heat dissipation devices are difficult to cope with transient loads and cannot be completely isolated from salt spray, dust, flammable and explosive gases or water. A heat dissipation structure for a frequency converter of a generator set is provided.

[0008] To solve the above technical problem, the technical solution provided by the present invention is: a heat dissipation structure for a frequency converter of a generator set, which includes a cabinet. A sealing seat is provided on the top of the cabinet, and a detachable sealing cover is provided on the top of the sealing seat. A plurality of mounting brackets are fixedly arranged at the bottom of the sealing cover, and a plurality of frequency converter components with vertical fins are provided on the mounting brackets.

[0009] At the top of the inner side wall of the cabinet, there is a first convection window, and at the bottom of the side wall, there is a second convection window. On the outer side wall of the cabinet, there is a detachable water-cooled heat exchanger or air-cooled heat exchanger. On the side of the water-cooled heat exchanger and the air-cooled heat exchanger facing the outer side wall of the cabinet, there are a first convection chamber and a second convection chamber respectively. The first convection chamber and the second convection chamber connect the first convection window and the second convection window. In the first convection chamber and the second convection chamber, there are vertically oriented first fins and second fins respectively, and both the first fins and the second fins are arranged in the vertical direction.

[0010] Furthermore, on both sides of the water-cooled heat exchanger, there are folded water channels. In the first convection chamber, a plurality of water-cooled heat exchange tubes are arranged in an up-and-down layout. The water-cooled heat exchange tubes pass through the first fins to connect the folded water channels on both sides. At the bottom of one side of the water-cooled heat exchanger, there is a circulating water inlet pipe connected to the bottom of the folded water channel, and at the top of the other side, there is a circulating water outlet pipe connected to the top of the folded water channel.

[0011] Furthermore, on both sides of the air-cooled heat exchanger, there are multiple U-shaped heat pipes arranged alternately up and down. On the outside of the air-cooled heat exchanger, there is a third fin, and the third fin is arranged in the vertical direction. One end of the U-shaped heat pipe extends to the second convection window and passes through the second fin, and the other end passes through the third fin.

[0012] Furthermore, on one side of the third fin where the air-cooled heat exchanger is located, there are multiple fan mounting brackets, and the fan mounting brackets are provided with multiple detachable fans.

[0013] Furthermore, at the bottom of the sealing cover, there is a downwardly protruding rectangular sealing ring. The sealing seat is provided with a rectangular sealing groove that matches the rectangular sealing ring, and a sealing gasket is nested on the inner bottom surface of the rectangular sealing groove.

[0014] Furthermore, both the inner circle and the outer circle of the inside of the rectangular sealing groove are provided with sealing block grooves. Inside the sealing block grooves, there are linearly movable sealing blocks that can expand and contract inside and outside. At the corners of the inner circle sealing block groove, there are inward and outwardly movable positive angle sealing blocks, and at the corners of the outer circle sealing block groove, there are inward and outwardly movable negative angle sealing blocks. Both ends of the linear sealing block, the positive angle sealing block, and the negative angle sealing block are set to be beveled. The two ends of the linear sealing block located in the inner circle sealing block groove are in tight fit with the two ends of the positive angle sealing block, and the two ends of the linear sealing block located in the outer circle sealing block groove are in tight fit with the negative angle sealing block.

[0015] Furthermore, on the back side of the linear sealing block, there are multiple first guide rods and multiple first spring sleeves. On both sides, there are balance sliders, and at the ends of the balance sliders, there are vertically extending balance chutes. Inside the sealing block groove, there is a balance component groove, and inside the balance component groove, there is a balance rod rotatably connected. The end of the balance rod is bent and extends into the balance chute for sliding connection.

[0016] Furthermore, on the back side of the positive angle sealing block and the negative angle sealing block, there are multiple second guide rods and second spring sleeves.

[0017] Furthermore, a plurality of mounting blocks are provided on both sides of the sealing seat. The mounting blocks are rotatably connected with a plurality of cams pulled by springs, and rollers are provided at the ends of the cams.

[0018] Furthermore, an injection pipe is provided at the top of the sealing cover, a discharge pipe is provided at the bottom of the cabinet body, and a liquid level sensor is provided on the sealing cover.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The internal heat transfer medium can achieve self-circulating heat transfer without additional power, with relatively high heat dissipation efficiency and can avoid contact with cooling water or air.

[0021] A targeted sealing structure is provided, which can provide good airtightness of the device, minimize the intrusion of salt mist or dust to the greatest extent, and ensure the service life of the device.

[0022] Good airtightness allows the use of fluorinated liquid as the internal heat transfer medium of the device. In the state of using fluorinated liquid, the internal heat transfer efficiency of the device can be further enhanced through gas-liquid phase change + concentration gradient drive, and the latent heat of phase change of fluorinated liquid can be utilized to cope with transient loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention.

[0024] Figure 2 is a schematic structural diagram of the cabinet body of the present invention.

[0025] Figure 3 is a schematic structural diagram of the mounting bracket of the present invention.

[0026] Figure 4 is a schematic structural diagram of the water-cooled heat exchanger of the present invention.

[0027] Figure 5 is a schematic diagram of the circulating water flow direction of the water-cooled heat exchanger of the present invention.

[0028] Figure 6 is a schematic diagram of heat exchange of the water-cooled heat exchanger of the present invention.

[0029] Figure 7 is a schematic structural diagram of the air-cooled heat exchanger of the present invention.

[0030] Figure 8 is a schematic structural diagram of the third fin of the present invention.

[0031] Figure 9 is a schematic diagram of heat exchange of the air-cooled heat exchanger of the present invention.

[0032] Figure 10 is a schematic structural diagram of the plug of the present invention.

[0033] Figure 11It is a schematic structural diagram of the sealing cover of the present invention.

[0034] Figure 12 It is a schematic structural diagram of the sealing seat of the present invention.

[0035] Figure 13 It is a schematic structural diagram of the rectangular sealing groove of the present invention.

[0036] Figure 14 It is a schematic structural diagram of the linear sealing block of the present invention.

[0037] Figure 15 It is a schematic structural diagram of the balance rod of the present invention.

[0038] Figure 16 It is a schematic diagram of the sealing effect of the present invention.

[0039] Figure 17 It is a schematic structural diagram of the cam of the present invention.

[0040] As shown in the figure: 1. Cabinet body, 2. Water-cooled heat exchanger, 3. Air-cooled heat exchanger, 4. Sealing seat, 5. Sealing cover, 6. First convection window, 7. Second convection window, 8. Discharge port, 9. Discharge pipe, 10. Installation bracket, 11. Inverter components, 12. First convection cavity, 13. First fin, 14. Water-cooled heat exchange pipe, 15. Deflecting water channel, 16. Circulating water inlet pipe, 17. Circulating water outlet pipe, 18. Second convection cavity, 19. Second fin, 20. U-shaped heat pipe, 21. Fan installation bracket, 22. Third fin, 23. Fan, 24. Plug, 25. Injection pipe, 26. Liquid level sensor, 27. Rectangular sealing ring, 28. Junction box, 29. Rectangular sealing groove, 30. Sealing gasket, 31. Sealing block groove, 32. Linear sealing block, 33. Outer corner sealing block, 34. Inner corner sealing block, 35. Balance slider, 36. Balance chute, 37. Balance assembly groove, 38. Balance rod, 39. Second guide rod, 40. Second spring sleeve, 41. Installation block, 42. Cam, 43. Roller, 44. First guide rod, 45. First spring sleeve. Specific embodiments

[0041] The present invention will be further described in detail below with reference to the accompanying drawings.

[0042] Combined with the attached Figure 1 and the attached Figure 3 A heat dissipation structure for an inverter of a generator set includes a cabinet body 1. A sealing seat 4 is provided at the top of the cabinet body 1. A detachable sealing cover 5 is provided at the top of the sealing seat 4. A plurality of installation brackets 10 are fixedly provided at the bottom of the sealing cover 5. A plurality of inverter components 11 with vertical fins are provided on the installation brackets 10.

[0043] Combined with the attached Figure 1 、the attached Figure 2 、the attachedFigure 4 , attached Figure 7 and attached Figure 10 , a first convection window 6 is provided at the top of the inner side wall of the cabinet body 1, a second convection window 7 is provided at the bottom of the side wall, and a detachable water-cooled heat exchanger 2 or air-cooled heat exchanger 3 is provided on the outer side wall of the cabinet body 1. A first convection cavity 12 and a second convection cavity 18 are respectively provided at the positions where the water-cooled heat exchanger 2 and the air-cooled heat exchanger 3 face the outer side wall of the cabinet body 1. The first convection cavity 12 and the second convection cavity 18 communicate the first convection window 6 and the second convection window 7. Vertically oriented first fins 13 and second fins 19 are respectively provided in the first convection cavity 12 and the second convection cavity 18.

[0044] This device can selectively install the water-cooled heat exchanger 2 or the air-cooled heat exchanger 3 according to the actual use environment and the required heat dissipation scale. The first convection window 6 and the second convection window 7 above and below the side wall of the cabinet body 1 where no radiator is installed can be sealed with plugs 24.

[0045] When the above mechanism is specifically implemented, transformer oil or fluorinated liquid is injected into the cabinet body 1 according to requirements. When the water-cooled heat exchanger 2 or the air-cooled heat exchanger 3 is installed on the outer side of the cabinet body 1, in addition to filling the cabinet body 1, the transformer oil or fluorinated liquid will also enter the first convection cavity 12 or the second convection cavity 18 through the second convection window 7. When transformer oil is selected, it should be ensured that the final liquid level of the transformer oil is higher than the first convection window 6. If fluorinated liquid is selected, it is necessary to ensure that the final liquid level is lower than the first convection window 6.

[0046] When transformer oil is selected, the heat generated by the operation of the frequency converter element 11 heats the transformer oil through the fins it has. Since the fins of the frequency converter element 11 itself are in the vertical direction and the density of the transformer oil decreases after being heated, the transformer oil in the cabinet body 1 warms up and floats upward and finally gathers at the first convection window 6. When the water-cooled heat exchanger 2 and the air-cooled heat exchanger 3 are operating, the first fins 13 or the second fins 19 absorb heat from the transformer oil they contact, causing the density of the transformer oil in the first convection cavity 12 or the second convection cavity 18 to increase. And since the first fins 13 and the second fins 19 are in the vertical direction, the transformer oil cools down and sinks to the second convection window 7 in the first convection cavity 12 or the second convection cavity 18. Since the transformer oil in the cabinet body 1 as a whole shows an upward movement and the transformer oil in the first convection cavity 12 or the second convection cavity 18 as a whole shows a downward movement, the transformer oil at the top of the cabinet body 1 enters the first convection cavity 12 or the second convection cavity 18 through the first convection window 6, and the transformer oil at the bottom of the first convection cavity 12 or the second convection cavity 18 enters the cabinet body 1 through the second convection window 7, and finally forms as attached Figure 6 or attached Figure 9The heat convection cycle is shown by the arrow direction. In this cycle, the transformer oil absorbs the heat generated by the operation of the frequency converter element 11 in the cabinet body 1, the temperature rises, and it flows into the first convection chamber 12 or the second convection chamber 18. Then, the first fin 13 or the second fin 19 absorbs the heat carried by the transformer oil to lower the temperature of the transformer oil and return it to the cabinet body 1 to achieve heat transfer.

[0047] When a fluorinated liquid is selected, since the boiling points of common fluorinated liquids such as perfluorohexane or FC-72 are about 50°C to 60°C, the temperature during the operation of the frequency converter element 11 can cause the fluorinated liquid to locally boil and vaporize near its fins. The gaseous fluorinated liquid floats up and accumulates at the top of the cabinet body 1 and mixes with the air. There is less accumulation of gaseous fluorinated liquid at the top of the first convection chamber 12 or the second convection chamber 18. Therefore, there is a concentration gradient of gaseous fluorinated liquid on both sides of the first convection window 6, causing the gaseous fluorinated liquid mixture in the cabinet body 1 to enter the first convection chamber 12 or the second convection chamber 18 through the first convection window 6 under the pressure difference generated by the concentration gradient and contact the first fin 13 or the second fin 19. The first fin 13 or the second fin 19 absorbs heat from the gaseous fluorinated liquid mixture, causing the fluorinated liquid to re-liquefy and flow downward along the first fin 13 or the second fin 19. Since the fluorinated liquid continuously liquefies in the first convection chamber 12 or the second convection chamber 18, the concentration of gaseous fluorinated liquid in the gas mixture at the top of the first convection chamber 12 or the second convection chamber 18 is moderately lower than that in the cabinet body 1, continuously generating a concentration gradient on both sides of the first convection window 6, causing the gaseous fluorinated liquid at the top of the cabinet body 1 to continuously flow into the first convection chamber 12 or the second convection chamber 18. Since the fluorinated liquid in the cabinet body 1 is continuously transferred into the first convection chamber 12 or the second convection chamber 18, and the fluorinated liquid in the cabinet body 1 and the first convection chamber 12 or the second convection chamber 18 is connected through the second convection window 7 and the liquid levels are kept the same, the fluorinated liquid in the first convection chamber 12 or the second convection chamber 18 will continuously flow into the cabinet body 1 through the second convection window 7 to maintain the balance of the liquid level, finally forming a phase change cycle as shown by the arrow direction in the attached Figure 6 or attached Figure 9 In the phase change cycle shown by the arrow direction in the attached figure. In this cycle, the fluorinated liquid absorbs the heat generated by the operation of the frequency converter element 11 in the cabinet body 1, vaporizes and rises, and flows into the first convection chamber 12 or the second convection chamber 18. Then, the first fin 13 or the second fin 19 absorbs the heat carried by the fluorinated liquid to cause the fluorinated liquid to liquefy and descend and finally return to the cabinet body 1 to achieve heat transfer. Since the fluorinated liquid can achieve heat exchange through both heat conduction and its own phase change, the latent heat of phase change can improve its heat-carrying capacity to cope with the transient load brought by the rotational speed fluctuation during the operation of the generator.

[0048] In summary, the present invention can cooperate with common heat-conducting fluids to achieve fluid circulation heat transfer in a closed environment, and it does not require power drive, having a relatively high heat transfer efficiency.

[0049] Combined with the attached Figure 4 and attachedFigure 5 , attached Figure 5 The arrow in it represents the flow direction of the circulating water. There are folded water channels 15 provided on both sides of the water-cooled heat exchanger 2. A plurality of water-cooled heat exchange tubes 14 are arranged vertically in the first convection chamber 12. The water-cooled heat exchange tubes 14 pass through the first fins 13 to connect the folded water channels 15 on both sides. A circulating water inlet pipe 16 is provided at the bottom of one side of the water-cooled heat exchanger 2 and is connected to the bottom of the folded water channel 15. A circulating water outlet pipe 17 is provided at the top of the other side and is connected to the top of the folded water channel 15.

[0050] The cooling circulating water enters the water-cooled heat exchanger 2 and, under the guidance of the folded water channel 15, passes through each water-cooled heat exchange tube 14 in the direction indicated by the arrow attached Figure 5 in sequence, absorbs heat from the first fins 13. Since the transformer oil or fluorinated liquid flows downward in the first convection chamber 12, the cooling circulating water enters from the bottom and exits from the top in the water-cooled heat exchanger 2.

[0051] Combined with the attached Figure 7 and the attached Figure 8 , a plurality of U-shaped heat pipes 20 arranged alternately up and down are provided on both sides of the air-cooled heat exchanger 3. The heat pipes can keep both ends at the same temperature. This technology belongs to the prior art and will not be further described in this application. A third fin 22 is provided on the outside of the air-cooled heat exchanger 3. The third fin 22 is arranged in the vertical direction. One end of the U-shaped heat pipe 20 extends into the second convection chamber 18 and passes through the second fin 19, and the other end passes through the third fin 22.

[0052] After the second fin 19 absorbs heat from the transformer oil or fluorinated liquid and its temperature rises, since it is connected to the third fin 22 through the U-shaped heat pipe 20, the U-shaped heat pipe 20 transfers the heat of the second fin 19 to the third fin 22 to keep the second fin 19 and the third fin 22 at the same temperature. After the temperature of the third fin 22 rises, it heats the surrounding air. Since the third fin 22 is in the vertical direction, the air density decreases after heating and continuously rises along the third fin 22, realizing passive heat dissipation by natural convection.

[0053] In addition to the above passive heat dissipation by natural convection, a plurality of fan mounting brackets 21 are provided on the side of the air-cooled heat exchanger 3 where the third fin 22 is provided. The fan mounting brackets 21 are provided with a plurality of detachable fans 23, and active air-cooling heat dissipation can be achieved through the fans 23.

[0054] Since this device needs transformer oil or fluorinated liquid to achieve internal circulating heat transfer, transformer oil is mainly composed of alkanes, cycloalkanes and a small amount of aromatic hydrocarbons, with stable chemical properties and low volatility itself. However, under high temperature or oxidation conditions, it may decompose to generate volatile gases, while fluorinated liquid has strong volatility, and gaseous fluorinated liquid is somewhat destructive to the environment. Therefore, the cabinet 1 needs to have airtightness.

[0055] Combined with the attached Figure 2 , the attached Figure 11and the attached Figure 12 , the top of the sealing cover 5 is provided with an injection pipe 25 and a junction box 28, the bottom of the cabinet body 1 is provided with a discharge port 8, and a discharge pipe 9 is connected and arranged. Valves are provided on both the injection pipe 25 and the discharge pipe 9. A liquid level sensor 26 is provided on the sealing cover 5. Transformer oil or fluorinated liquid can be filled through the injection pipe 25. The liquid level sensor 26 can reflect the position of the internal liquid level. When it is necessary to maintain and repair the internal frequency converter components 11, the transformer oil or fluorinated liquid in the cabinet body 1 can be discharged in advance through the discharge pipe 9 to facilitate the operation.

[0056] The above-mentioned components and the connections between the cabinet body 1 and the water-cooled heat exchanger 2 or the air-cooled heat exchanger 3 can all achieve good sealed connections by using common sealing technologies. However, for this device, it is necessary to regularly maintain and repair the internal frequency converter components 11. Therefore, when the sealing cover 5 has the ability to be opened and closed, sufficient sealing needs to be provided.

[0057] Combined with the attached Figure 11 , the attached Figure 12 and the attached Figure 13 , the bottom of the sealing cover 5 is provided with a rectangular sealing ring 27 protruding downward. The sealing seat 4 is provided with a rectangular sealing groove 29 that matches the rectangular sealing ring 27, and a sealing gasket 30 is nested on the inner bottom surface of the rectangular sealing groove 29.

[0058] The bottom of the rectangular sealing ring 27 can form a horizontal sealing surface with the rectangular sealing groove 29, and vertical sealing surfaces can be formed on both sides. The sealing gasket 30 can provide a good sealing effect on the horizontal sealing surface. However, for the vertical sealing surfaces with a rectangular contour, conventional sealing rings are difficult to provide effective sealing at the corners of the rectangular sealing ring 27.

[0059] Combined with the attached Figure 13 and the attached Figure 14 , both the inner circle and the outer circle of the inside of the rectangular sealing groove 29 are provided with sealing block grooves 31. Linear sealing blocks 32 that can be telescoped inside and outside are arranged in the sealing block grooves 31. Positive-angle sealing blocks 33 that can be telescoped inside and outside are provided at the corners of the inner-circle sealing block grooves 31, and negative-angle sealing blocks 34 that can be telescoped inside and outside are provided at the corners of the outer-circle sealing block grooves 31.

[0060] Combined with the attached Figure 14 and the attached Figure 15 , a plurality of first guide rods 44 and a plurality of first spring sleeves 45 are provided on the back side of the linear sealing block 32. A plurality of second guide rods 39 and second spring sleeves 40 are provided on the back side of the positive-angle sealing block 33 and the negative-angle sealing block 34. The spring sleeves can push the sealing blocks to tightly press against the side wall of the rectangular sealing ring 27 to form a seal. Among them, the positive-angle sealing block 33 and the negative-angle sealing block 34 respectively press tightly inside and outside at the corners of the rectangular sealing ring 27 to form a seal.

[0061] Combined with the attached Figure 15, both ends of the linear seal block 32, the external corner seal block 33 and the internal corner seal block 34 are set as chamfered corners. Both ends of the linear seal block 32 located in the inner ring seal block groove 31 are in tight fit with both ends of the external corner seal block 33, and both ends of the linear seal block 32 located in the outer ring seal block groove 31 are in tight fit with the internal corner seal block 34.

[0062] Combined with the attached Figure 15 and the attached Figure 16 , a plurality of first guide rods 44 and a plurality of first spring sleeves 45 are provided on the back side of the linear seal block 32. Balance sliders 35 are provided on both sides. A balance chute 36 extending in the vertical direction is provided at the end of the balance slider 35. A balance component groove 37 is provided in the seal block groove 31. A balance rod 38 is rotatably connected in the balance component groove 37. The end of the balance rod 38 is bent and extends into the balance chute 36 for sliding connection.

[0063] Since the linear seal block 32 is relatively long, in order to ensure that both ends of it can be evenly in tight fit with the side wall of the rectangular seal ring 27, the balance sliders 35 on both sides of the linear seal block 32 are connected by the balance rod 38. The balance rod 38 enables the linear seal block 32 to be balanced in force through the anti-torsion ability of its own material.

[0064] Combined with the attached Figure 17 , a plurality of mounting blocks 41 are provided on both sides of the seal seat 4. A plurality of cams 42 pulled by springs are rotatably connected to the mounting blocks 41. A roller 43 is provided at the end of the cam 42. The springs mounted on the mounting blocks 41 are tension springs, which can pull the cam 42 to turn downward, so that the roller 43 presses downward against the seal cover 5 to form a downward pressure and provide the pressure required for sealing. When it is necessary to open the seal cover 5, manually turning the cam 42 can make the spring pull the cam 42 in the other direction.

[0065] The above describes the present invention and its implementation manners. This description is not restrictive, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and without departing from the purpose of the present invention creation, they design similar structural ways and embodiments to this technical solution without creative efforts, which should all fall within the protection scope of the present invention.

Claims

1. A heat dissipation structure for a frequency converter of a generator set, which comprises a cabinet body (1). A sealing seat (4) is provided at the top of the cabinet body (1), and a detachable sealing cover (5) is provided at the top of the sealing seat (4). A plurality of mounting brackets (10) are fixedly arranged at the bottom of the sealing cover (5), and a plurality of frequency converter elements (11) with vertical fins are provided on the mounting brackets (10), and it is characterized in that: At the top of the inner side wall of the cabinet body (1), a first convection window (6) is provided, and at the bottom of the side wall, a second convection window (7) is provided. A detachable water-cooled heat exchanger (2) or an air-cooled heat exchanger (3) is provided on the outer side wall of the cabinet body (1). A first convection cavity (12) and a second convection cavity (18) are respectively provided at the positions where the water-cooled heat exchanger (2) and the air-cooled heat exchanger (3) face the outer side wall of the cabinet body (1). The first convection cavity (12) and the second convection cavity (18) communicate the first convection window (6) and the second convection window (7), and vertically oriented first fins (13) and second fins (19) are respectively provided in the first convection cavity (12) and the second convection cavity (18).

2. The radiator structure of the generator set frequency converter according to claim 1, characterized in that: On both sides of the water-cooled heat exchanger (2), folded water channels (15) are provided. A plurality of water-cooled heat exchange tubes (14) are arranged in the first convection cavity (12) in an up-and-down arrangement. The water-cooled heat exchange tubes (14) pass through the first fins (13) to connect the folded water channels (15) on both sides. At the bottom of one side of the water-cooled heat exchanger (2), a circulating water inlet pipe (16) is provided and communicated with the bottom of the folded water channel (15), and at the top of the other side, a circulating water outlet pipe (17) is provided and communicated with the top of the folded water channel (15).

3. The heat dissipation structure of the generator set frequency converter according to claim 1, characterized in that: On both sides of the air-cooled heat exchanger (3), a plurality of U-shaped heat pipes (20) arranged alternately up and down are provided. A third fin (22) is provided on the outer side of the air-cooled heat exchanger (3), and the third fin (22) is arranged in the vertical direction. One end of the U-shaped heat pipe (20) extends into the second convection cavity (18) and passes through the second fin (19), and the other end passes through the third fin (22).

4. The cooling structure of the generator set frequency converter according to claim 2, wherein: On the side of the air-cooled heat exchanger (3) where the third fin (22) is provided, a plurality of fan mounting brackets (21) are provided, and a plurality of detachable fans (23) are provided on the fan mounting brackets (21).

5. The cooling structure of the generator set frequency converter according to claim 1, characterized in that: At the bottom of the sealing cover (5), a downwardly protruding rectangular sealing ring (27) is provided. The sealing seat (4) is provided with a rectangular sealing groove (29) that cooperates with the rectangular sealing ring (27), and a sealing gasket (30) is nested on the inner bottom surface of the rectangular sealing groove (29).

6. The heat dissipation structure of the generator set frequency converter according to claim 5, characterized in that: Sealing block grooves (31) are provided both inside and outside the inner circle of the rectangular sealing groove (29). Line sealing blocks (32) that can expand and contract inside and outside are arranged in the sealing block grooves (31). Positive-angle sealing blocks (33) that can expand and contract inside and outside are provided at the corners of the inner-circle sealing block grooves (31), and negative-angle sealing blocks (34) that can expand and contract inside and outside are provided at the corners of the outer-circle sealing block grooves (31). Both ends of the line sealing blocks (32), the positive-angle sealing blocks (33), and the negative-angle sealing blocks (34) are set to be beveled. The two ends of the line sealing blocks (32) located in the inner-circle sealing block grooves (31) are in tight abutting cooperation with the two ends of the positive-angle sealing blocks (33), and the two ends of the line sealing blocks (32) located in the outer-circle sealing block grooves (31) are in tight abutting cooperation with the negative-angle sealing blocks (34).

7. The heat dissipation structure of the generator set frequency converter according to claim 6, characterized in that: On the back side of the straight sealing block (32), there are multiple first guiding rods (44) and multiple first spring sleeves (45). On both sides, there are balance sliders (35). At the end of the balance slider (35), there is a balance chute (36) extending in the vertical direction. Inside the sealing block groove (31), there is a balance component groove (37). Inside the balance component groove (37), a balance rod (38) is rotatably connected. The end of the balance rod (38) is bent and extends into the balance chute (36) for sliding connection.

8. The cooling structure of the generator set frequency converter according to claim 6, characterized in that: On the back side of the external corner sealing block (33) and the internal corner sealing block (34), there are multiple second guiding rods (39) and second spring sleeves (40).

9. The cooling structure of the generator set frequency converter according to claim 1, characterized in that: On both sides of the sealing seat (4), there are multiple mounting blocks (41). Multiple cams (42) pulled by springs are rotatably connected to the mounting blocks (41). At the end of the cam (42), there is a roller (43).

10. The heat dissipation structure of the generator set frequency converter according to claim 1, characterized in that: On the top of the sealing cover (5), there is an injection pipe (25). At the bottom of the cabinet body (1), there is a discharge pipe (9). On the sealing cover (5), there is a liquid level sensor (26).

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