Inverter

Abstract

An inverter comprises a box body, a power main component and a heat-sensitive component which are arranged in the box body, and a first partition plate and a second partition plate which divide the box body into a heat dissipation cavity, a low-temperature cavity and a power cavity, the power main component is arranged in the power cavity, the heat-sensitive component is arranged in the low-temperature cavity, the first partition plate is provided with a mounting hole, and the second partition plate is provided with a mounting hole. The inverter is further provided with a first radiator which is just inserted and fixed in the mounting hole, the first radiator comprises a condenser and an evaporator, the condenser is arranged in the heat dissipation cavity, the evaporator is arranged in the low-temperature cavity, and a first heat dissipation fan is arranged in the heat dissipation cavity. According to the inverter, the box body is divided into the heat dissipation cavity, the low-temperature cavity and the power cavity which are mutually independent, and the first heat dissipation device is specially arranged to dissipate heat of the heat-sensitive component; and the power cavity and the heat dissipation cavity are respectively separated from the low-temperature cavity in a sealed manner, so that the heat dissipation effect is very good, and the heat dissipation efficiency is very high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, in particular to a kind of inverter. BACKGROUND

[0002] Inverter is a kind of direct current electric energy conversion into alternating current electric energy device, is one of the core equipment in power electronics technology. With the increasing of inverter power density and protection requirements gradually, internal ring temperature control of inverter gradually becomes important factor limiting product design. Current inverter is mostly using water cooling heat dissipation scheme, but water cooling heat dissipation still has many inverter its inside some components and parts of which the environmental temperature requirement is higher cannot be well cooled, the temperature of component and part is too high and affects the normal operation of equipment, in turn affects equipment life.

[0003] Therefore, it is urgent to develop an inverter with good heat dissipation effect. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of inverter with good heat dissipation effect to avoid the deficiencies in prior art, to solve the above technical problems.

[0005] A kind of inverter, comprising: box, power main component and heat-sensitive component and part of which the environmental temperature requirement is high are arranged in box, first partition plate and second partition plate, which are used to separate the box into mutually independent heat dissipation cavities, low-temperature cavity and power cavity distributed in upper, middle and lower, the power main component is arranged in the power cavity, the heat-sensitive component and part is arranged in the low-temperature cavity, the left and right sides of the heat dissipation cavity of the box are respectively provided with air inlet and air outlet, the first partition plate is provided with mounting hole, the inverter is also provided with first radiator just inserted and fixed in the mounting hole, the first radiator includes condenser and evaporator, the condenser is arranged in the heat dissipation cavity, the evaporator is arranged in the low-temperature cavity, the side of the condenser in the heat dissipation cavity close to the air outlet is provided with first heat dissipation fan.

[0006] Preferably, the above-mentioned first radiator includes heat dissipation fin and vertical heat dissipation pipe arranged in layers, and the heat dissipation fin is provided with fixing hole.

[0007] Preferably, the above-mentioned heat dissipation pipe is welded and fixed in the fixing hole.

[0008] Preferably, the above-mentioned heat dissipation pipe is fixed in the fixing hole by interference fit.

[0009] Preferably, the heat-sensitive components include a filter capacitor, a bus capacitor and a power board, the filter capacitor is arranged on the left side of the evaporator, the bus capacitor is arranged on the right side of the evaporator, the right end of the bus capacitor is provided with a second cooling fan, and the power board is arranged on the right side of the second cooling fan.

[0010] Preferably, the power cavity is provided with a second heat sink and a third cooling fan, and the third cooling fan is arranged above the second heat sink.

[0011] Preferably, the power main components include a DC fuse, a DC switch, a power module, a power inductor and an AC switch, the DC fuse, the DC switch, the bus capacitor, the power module, the power inductor and the AC switch are connected in series through busbars in sequence, the filter capacitor is electrically connected to the input end of the AC switch through busbars, the power inductor is arranged in the middle of the power cavity, the second heat sink is arranged above the power inductor, the DC fuse and the DC switch are arranged in the left part of the power cavity from bottom to top in sequence, and the power module and the AC switch are arranged in the right part of the power cavity from top to bottom in sequence.

[0012] Preferably, the power main components further include a transformer and a Hall sensor, the transformer is electrically connected to the output end of the power inductor through busbars, the output end of the transformer is electrically connected to the input end of the power board, the transformer is arranged below the AC switch, and the Hall sensor is sleeved on the input busbar of the AC switch.

[0013] Preferably, the cabinet is further provided with a dry cooler, the inverter is further provided with a heat exchange pipeline arranged outside the power module, the inverter is further provided with a cooling pipeline, and the cooling pipeline communicates the dry cooler and the second heat sink and communicates the dry cooler and the heat exchange pipeline.

[0014] Preferably, the first heat sink is a heat pipe radiator, a water-cooled radiator or a thermosyphon radiator, and the bus capacitor is arranged in a concentrated manner.

[0015] Compared with the prior art, the inverter of the utility model has the following advantages: the inverter of the utility model is provided with the first radiator, the condenser is located in the heat dissipation cavity, and the evaporator is arranged in the low-temperature cavity. The condenser and the evaporator are provided with refrigerant or water and other media, and when working, the medium in the evaporator absorbs the heat in the low-temperature cavity, the evaporator dissipates heat for the heat-sensitive components with high requirements for ambient temperature, the medium absorbing heat enters the condenser, and the condenser is specially cooled in the heat dissipation cavity. The heat dissipation process of the condenser is as follows: the first heat dissipation fan is started, under the suction of the first heat dissipation fan, the cold air outside enters the heat dissipation cavity from the air inlet, absorbs the heat of the condenser when passing through the condenser and becomes hot air, the hot air absorbing heat is discharged through the air outlet, and the heat dissipation of the condenser is realized.

[0016] The inverter of the utility model divides the box body into the mutually independent heat dissipation cavity, the low-temperature cavity and the power cavity which are distributed in the upper, middle and lower positions through the first partition plate and the second partition plate, the power main component is arranged in the power cavity, the heat-sensitive component with high requirements for ambient temperature is arranged in the low-temperature cavity alone, and the first radiator is specially arranged to dissipate heat for the heat-sensitive component; and since the power cavity and the heat dissipation cavity are separately and tightly separated from the low-temperature cavity, the heat dissipation effect of the heat-sensitive component with high requirements for ambient temperature of the inverter of the utility model is very good, the heat dissipation efficiency is very high, the normal operation of the equipment is ensured, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further described by means of the drawings, but the embodiments in the drawings do not constitute any limitation on the utility model.

[0018] Figure 1 It is a structure schematic view of an inverter of the utility model;

[0019] Figure 2 It is a structure schematic view of the low-temperature cavity and the first radiator of an inverter of the utility model;

[0020] Figure 3 It is a structure schematic view of the low-temperature cavity and the first radiator of an inverter of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described by means of the following embodiments and drawings:

[0022] An inverter, such as Figures 1 to 3As shown, including: box 10, set in the box 10 power main components 11 and the high environmental temperature requirements of heat sensitive components 12, the box 10 is divided into the upper middle and lower distribution of independent heat dissipation cavity 13, low temperature cavity 14 and power cavity 15 first partition 16 and second partition 17, power main components 11 is arranged in the power cavity 15, heat sensitive components 12 is arranged in the low temperature cavity 14, the left and right sides of the heat dissipation cavity 13 of the box 10 are provided with air inlet 18 and air outlet 19 respectively, the first partition 16 is provided with mounting hole 20, the inverter is also provided with first radiator 21 is just inserted and fixed in the mounting hole 20, the first radiator 21 includes condenser 22 and evaporator 23, the condenser 22 is arranged in the heat dissipation cavity 13, the evaporator 23 is arranged in the low temperature cavity 14, the side of the condenser 22 in the heat dissipation cavity 13 close to the air outlet 19 is provided with first cooling fan 40.

[0023] The inverter of the utility model is provided with first radiator 21, condenser 22 is located in the heat dissipation cavity 13, evaporator 23 is arranged in the low temperature cavity 14.Condenser 22 and evaporator 23 are provided with refrigerant or medium such as water, when working, the medium in evaporator 23 absorbs the heat in low temperature cavity 14, evaporator 23 gives heat sensitive components 12 that require high environmental temperature and radiates, the medium that absorbs heat enters condenser 22, and the heat dissipation cavity 13 is specially used for radiating condenser 22.The heat dissipation process of condenser 22 is: opening first cooling fan 40, under the suction of first cooling fan 40, the outside cold air enters heat dissipation cavity 13 from air inlet 18, becomes hot air when passing through condenser 22 and absorbing the heat of condenser 22, and the hot air that absorbs heat is discharged through air outlet 19, thereby realizing the heat dissipation of condenser 22.The flow direction of air is shown in detail in the direction of dotted line arrow. Figure 1

[0024] The inverter of the utility model is divided into the upper middle and lower distribution of independent heat dissipation cavity 13, low temperature cavity 14 and power cavity 15 by first partition 16 and second partition 17, power main components 11 is arranged in the power cavity 15, heat sensitive components 12 that require high environmental temperature are arranged in low temperature cavity 14, and first radiator 21 is specially arranged to radiate heat sensitive components 12;And because power cavity 15 and heat dissipation cavity 13 are respectively closed and separated from low temperature cavity 14, the heat dissipation effect of heat sensitive components 12 that require higher environmental temperature of the inverter of the utility model is very good, the heat dissipation efficiency is very high, which ensures the normal operation of the equipment and prolongs the service life of the equipment.

[0025] Preferably, as Figure 3 ​As shown, the first heat sink 21 comprises heat dissipation fins 24 and vertical heat dissipation pipes 25 arranged in layers. The heat dissipation fins 24 are provided with fixing holes 26. The heat dissipation pipes 25 are sleeved with the heat dissipation fins 24. The heat dissipation fins 24 increase the heat exchange area and improve the heat exchange efficiency. That is, the heat dissipation fins 24 of the heat dissipation pipes 25 located at the evaporator 23 are beneficial to absorbing the heat of the low-temperature cavity 14; the heat dissipation fins 24 of the heat dissipation pipes 25 located at the condenser 22 are beneficial to dissipating the heat of the condenser 22. Therefore, the arrangement of the heat dissipation fins 24 greatly improves the heat dissipation efficiency of the first heat sink 21 and the heat dissipation effect is good.

[0026] Specifically, the heat dissipation pipes 25 can be fixed in the fixing holes 26 through interference fit. Of course, the heat dissipation pipes 25 can also be welded in the fixing holes 26.

[0027] The interference fit is a connection mode in the mechanical assembly of the prior art. The feature is that the size of the fixing hole 26 is slightly smaller than the size of the heat dissipation pipe 25. This fitting mode utilizes the elasticity of the material to make the hole expand and deform to be sleeved on the heat dissipation pipe 25. When the fixing hole 26 restores, a clamping force is generated on the heat dissipation pipe 25, so that the two parts are connected together. The heat dissipation pipe 25 can be fixed in the fixing hole 26 through interference fit. No additional fixing part is needed. The structure is simple, and the fixation is firm and reliable.

[0028] The heat dissipation pipe 25 can also be welded in the fixing hole 26. Only the heat dissipation pipe 25 is inserted into the fixing hole 26, and then the heat dissipation pipe 25 is fixed in the fixing hole 26 through welding. The fixing method is simple, and the fixation is firm and reliable.

[0029] Preferably, the heat-sensitive components 12 comprise a filter capacitor 27, a bus capacitor 28 and a power board 29. The filter capacitor 27 is arranged on the left side of the evaporator 23. The bus capacitor 28 is arranged on the right side of the evaporator 23. The right end of the bus capacitor 28 is provided with a second heat dissipation fan 30. The power board 29 is arranged on the right side of the second heat dissipation fan 30.

[0030] The filter capacitor 27 and the bus capacitor 28 are respectively arranged on the two sides of the evaporator 23, which is close to each other, is beneficial to the evaporator 23 to take away the heat of the filter capacitor 27 and the bus capacitor 28, improves the heat dissipation efficiency, and the heat dissipation effect is good. After the second heat dissipation fan 30 is started, due to the suction of the second heat dissipation fan 30, the hot air that absorbs the heat of the filter capacitor 27 located on the left side of the evaporator 23 is sucked to the evaporator 23. After being cooled by the evaporator 23, the hot air becomes cold air and flows into the bus capacitor 28 on the right side of the evaporator 23. After the cold air absorbs the heat of the bus capacitor 28, it continues to dissipate the heat of the power board 29 on the right side. Finally, the cold air is reflected back to the evaporator 23 through the inner wall of the box body 10 for heat dissipation. The use of the second heat dissipation fan 30 accelerates the air circulation in the low-temperature cavity 14, which is beneficial to the heat dissipation of the heat-sensitive components 12 on the two sides of the evaporator 23, and greatly improves the heat dissipation efficiency.

[0031] Preferably, as shown in Figure 1 The power cavity 15 is an independent closed cavity, and the inside of the power cavity 15 is cooled by the independent second radiator 31 and the third cooling fan 32. When cooling, the third cooling fan 32 is started, air is drawn into the third cooling fan 32 from the bottom through the second radiator 31, the hot air that has absorbed the heat of the power main components 11 in the power cavity 15 is cooled by the second radiator 31 and becomes cold air, and the cold air is blown out by the third cooling fan 32 and dispersed to both sides of the third cooling fan 32. The cold air blown out by the third cooling fan 32 absorbs the heat of the power main components 11 when passing through the power main components 11 in the power cavity 15, and the cycle is repeated. An independent air duct is formed in the power cavity 15, and the power main components 11 in the power cavity 15 are cooled by the second radiator 31 and the third cooling fan 32. Due to the independent and concentrated cooling, the cooling effect is good, and the cooling efficiency is high. The flow direction of the air is shown by the dotted arrow in Figure 1 .

[0032] Preferably, as shown in Figure 1 The power main components 11 include a direct current fuse 33, a direct current switch 34, a power module 35, a power inductor 36, and an alternating current switch 37. The direct current fuse 33, the direct current switch 34, the bus capacitor 28, the power module 35, the power inductor 36, and the alternating current switch 37 are connected in series through the busbar in sequence. The filter capacitor 27 is electrically connected to the input end of the alternating current switch 37 through the busbar. The power inductor 36 is arranged in the middle part of the power cavity 15. The second radiator 31 is arranged above the power inductor 36. The direct current fuse 33 and the direct current switch 34 are arranged in the left part of the power cavity 15 from bottom to top in sequence. The power module 35 and the alternating current switch 37 are arranged in the right part of the power cavity 15 from top to bottom in sequence.

[0033] The arrangement of the power main components 11 is as follows. Under the suction effect of the third cooling fan 32, the cooling air passes through the power inductor 36 below the second radiator 31, the hot cavity that has absorbed the heat of the power inductor 36 enters the second radiator 31, becomes cold air after being cooled by the second radiator 31, and is blown out by the third cooling fan 32 and dispersed to both sides of the third cooling fan 32. The cold air on both sides successively cools the direct current fuse 33, the direct current switch 34, the power module 35, and the alternating current switch 37 on both sides. Finally, the cooling air on both sides flows into the power inductor 36 from the bottom. The cycle is repeated, each power main component 11 in the power cavity 15 is cooled by the second radiator 31 and the third cooling fan 32, the cooling effect is good, and the cooling efficiency is high. The direct current fuse 33 and the alternating current switch 37 are arranged below, the layout is reasonable, and it is beneficial to connect the external power supply from the bottom of the cabinet 10 and output the power supply to the outside.

[0034] Specifically, the power module 35 is used to convert direct current into alternating current; the bus capacitor 28 is used to absorb voltage spikes; the power inductor 36 and the filter capacitor 27 both play a filtering role,

[0035] Preferably, as shown in the figure, the power main component 11 further comprises a transformer 38 and a Hall sensor 39, the transformer is electrically connected with the output end of the power inductor 36 through a bus, the output end of the transformer is electrically connected with the input end of the power board 29, the transformer is arranged below the AC switch 37, and the Hall sensor 39 is sleeved on the input bus of the AC switch 37. Figure 1

[0036] The transformer takes power on the AC side, changes the voltage into the required voltage for the first cooling fan 40, the second cooling fan 30 and the third cooling fan 32; and the power board 29 is used to supply power to the first cooling fan 40, the second cooling fan 30 and the third cooling fan 32 respectively. The Hall sensor 39 is used to detect current, voltage and power parameters of the circuit.

[0037] Preferably, as shown in the figure, the box body 10 is further provided with a dry cooler 41, the inverter is further provided with a heat exchange pipeline sleeved outside the power module 35, and the inverter is further provided with a cooling pipeline. Figure 1

[0038] The dry cooler 41, also known as a dry cooler, is a device in the prior art for reducing the temperature of liquid in a pipe through natural wind. The dry cooler 41 is externally arranged, and through the cooling pipeline, the power module 35 and the second radiator 31 are respectively cooled, and the power module 35 with large heat dissipation is separately provided with a heat exchange pipeline for cooling, so that the cooling effect is better and the cooling efficiency is very high.

[0039] Specifically, the first radiator 21 can be a heat pipe radiator or a water-cooled radiator or a thermal siphon radiator, and the bus capacitor 28 is arranged in a centralized manner.

[0040] The heat pipe radiator is a heat dissipation device in the prior art that realizes high-efficiency heat conduction by using heat pipe technology, and mainly comprises a sealed pipe, a wick and a vapor passage. The wick is wrapped around the pipe wall of the sealed pipe and is immersed in a saturated liquid that can volatilize; when the evaporator 23 absorbs heat, the liquid in the wick will boil and become vapor. The vapor carries heat to the condenser 22, releases heat and condenses into liquid, and then returns to the evaporation section through capillary action to form a circulation process and continuously dissipate heat.

[0041] ​​The water-cooled radiator is a heat dissipation device of the prior art that uses liquid circulation to take away heat.

[0042] The thermosyphon radiator is a device of the prior art that uses the thermosyphon phenomenon to dissipate heat.

[0043] The bus capacitor 28 is arranged in a concentrated manner, that is, the bus capacitor 28 of the inverter of the utility model is selected to be a capacitor cell scheme, which can not only reduce the loss of the capacitor, but also is more conducive to concentrated heat dissipation of the capacitor.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, and are not intended to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.

Claims

1. An inverter, characterized in that, include: The inverter comprises a housing, main power components and heat-sensitive components with high environmental temperature requirements housed within the housing, and a first and second partition that divide the housing into independent heat dissipation cavities, a low-temperature cavity, and a power cavity distributed in an upper, middle, and lower manner. The main power components are housed in the power cavity, and the heat-sensitive components are housed in the low-temperature cavity. Air inlets and outlets are respectively provided on the left and right sides of the heat dissipation cavities of the housing. The first partition has mounting holes, and the inverter also has a first heat sink that is inserted and fixed in the mounting holes. The first heat sink includes a condenser and an evaporator. The condenser is housed in the heat dissipation cavity, and the evaporator is housed in the low-temperature cavity. A first cooling fan is provided on the side of the condenser in the heat dissipation cavity near the air outlet.

2. The inverter according to claim 1, characterized in that: The first heat sink includes stacked heat dissipation fins and vertically arranged heat dissipation pipes. The heat dissipation fins are provided with fixing holes, and the heat dissipation pipes are inserted and fixed in the fixing holes.

3. An inverter according to claim 2, characterized in that: The heat dissipation pipe is welded and fixed inside the fixing hole.

4. An inverter according to claim 2, characterized in that: The heat dissipation pipe is fixed in the fixing hole by an interference fit.

5. An inverter according to claim 3 or 4, characterized in that: The heat-sensitive components include a filter capacitor, a bus capacitor, and a power board. The filter capacitor is located on the left side of the evaporator, the bus capacitor is located on the right side of the evaporator, a second cooling fan is located at the right end of the bus capacitor, and the power board is located to the right of the second cooling fan.

6. An inverter according to claim 5, characterized in that: The power cavity is equipped with a second radiator and a third cooling fan, with the third cooling fan positioned above the second radiator.

7. An inverter according to claim 6, characterized in that: The main power components include a DC fuse, a DC switch, a power module, a power inductor, and an AC switch. The DC fuse, the DC switch, the bus capacitor, the power module, the power inductor, and the AC switch are connected in series via a busbar. The filter capacitor is electrically connected to the input terminal of the AC switch via the busbar. The power inductor is located in the middle of the power cavity, and the second heat sink is located above the power inductor. The DC fuse and the DC switch are arranged from bottom to top on the left side of the power cavity, and the power module and the AC switch are arranged from top to bottom on the right side of the power cavity.

8. An inverter according to claim 7, characterized in that: The main power components also include a transformer and a Hall sensor. The transformer is electrically connected to the output terminal of the power inductor via a busbar, and the output terminal of the transformer is electrically connected to the input terminal of the power board. The transformer is located below the AC switch, and the Hall sensor is fitted onto the input busbar of the AC switch.

9. An inverter according to claim 8, characterized in that: The enclosure is also equipped with a dry cooler, and the inverter is also equipped with a heat exchange pipeline wound around the power module. The inverter is also equipped with a cooling pipeline, which connects the dry cooler and the second radiator, as well as the dry cooler and the heat exchange pipeline.

10. An inverter according to claim 9, characterized in that: The first radiator is a heat pipe radiator, a water-cooled radiator, or a thermosiphon radiator, and the bus capacitors are centrally arranged.

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