Background technology
Reactor, transformer, IGBT power tube etc. generally all are installed in the photovoltaic combining inverter cabinet, great majority adopt the single duct system heat radiation in the existing photovoltaic combining inverter cabinet, both reactor, transformer, IGBT power tube were placed in the chamber, utilized cooling fan to pump modes such as wind, the circulation of water cooled pipeline water and dispelled the heat.In single duct system, there is following shortcoming: one, use cooling fan to pump the wind heat radiation, the heat that reactor, transformer and IGBT power tube send can transmit mutually, make the temperature at IGBT power tube place be difficult to reduce, influence its life-span and efficient, cause derate, moreover, because the heat that produces is bigger, temperature raises, and can reduce greatly fan life, the useful life of general high-power photovoltaic DC-to-AC converter is about 25 years, if want under the environment of high temperature, will the exigent fan of serviceability or powerful fan, increased cost; Two, use the heat radiation of water cooled pipeline water endless form, system complex, the maintenance cost height has a big risk; Three, contingency IGBT power tube aircraft bombing, its fragment can cause reactor, transformer secondary blast; Four, the reactor sine wave that produces and the rectangular wave mutual interference mutually that the IGBT power tube produces influences each other, and the performance of machine is reduced; Five, because the air channel is single, can not give the heat radiations such as power module, bus capacitor, switch, bus copper bar, copper bar of power supply of pcb plate, the rack inside of control cabinet, cause machine efficiency to reduce, even tripping operation; Six, cabinet advances dirt easily, the maintenance clean inconvenience, because the ability of reactor and the anti-dust of transformer is far longer than (PCC) power and circuit board, if reactor, when transformer is done dust prevention system, IGBT constant power module place dust will be many, if when doing dust prevention system according to IGBT power tube place, the windage of reactor and transformer just strengthens.
Summary of the invention
The objective of the invention is the defective at above-mentioned prior art existence, provide a kind of for the casing that photovoltaic combining inverter is installed.
The technical solution used in the present invention is, designs a kind ofly for the casing that photovoltaic combining inverter is installed, and wherein, casing is divided into Qian Cang and Hou Cang by an interlayer; Interlayer comprises the upper plate body that arranges perpendicular to the cabinet top board, and perpendicular to the lower body that chassis backplane arranges, upper plate body is connected with the middle plate body of lower body by horizontal positioned; In the preceding storehouse, the cabinet top board is provided with the fixed head that is parallel to upper plate body vertically downward, fixedlys connected with the panel of casing both sides by screw in its both sides, and fixed head and interlayer form first heat dissipation wind channel; The first fan group is installed between interlayer and the fixed head, and the top of first heat dissipation wind channel is provided with louvre at the top board of cabinet; The front door of cabinet is provided with the air inlet that leads to preceding storehouse; Be provided with the second fan group for exhausting in the back storehouse at the cabinet top, sidewall is respectively equipped with the air inlet that leads to the storehouse, back around chassis backplane and bottom, forms second heat dissipation wind channel thus.
In one embodiment, middle plate body two ends are connected with upper plate body, lower body by screw respectively.Middle plate body is a bent plate, comprises the tilting section that is connected with upper plate body and the horizontal segment that is connected with lower body.
In another embodiment, the bottom in preceding storehouse is provided with baffle plate, which is provided with the air inlet that leads to preceding storehouse; The top adjacent with the bottom is respectively equipped with upper left door cover plate and the upper right door cover plate of splitting in the preceding storehouse, and the downside of upper left door cover plate and the upside of upper right door cover plate are provided with the air inlet that leads to preceding storehouse.The inboard that the top in preceding storehouse is positioned at upper left door cover plate also is provided with one for the inner plating that pcb board is installed, and its upside is provided with the air inlet that leads to preceding storehouse.The left side of inner plating is connected with casing by hinge with the right side of upper right door cover plate, upper left door cover plate pass on left hinge with inner plating be connected.
Air inlet place on the described front door is provided with the ventilation filter assembly.
Air inlet place around the described cabinet bottom is provided with fly net.
The Rear Door of described cabinet is provided with the air inlet that leads to the storehouse, back.
Compared with prior art, the present invention adopts two air duct radiations, and reactor, transformer and IGBT power tube are in independently in the air channel, heat radiation has improved radiating efficiency respectively, prolongs the useful life of machine, simultaneously improved in the life-span of fan greatly, reduce the cost of fan; Reduced the risk of subsequent explosion, the electromagnetism that has produced when having shielded work is to avoid the influencing each other performance of raising machine.
Embodiment
Below in conjunction with drawings and Examples invention is described in detail.
As shown in Figure 1, the casing that is used for installing photovoltaic combining inverter that the present invention proposes, be provided with an interlayer 3 in this casing, comprise one with cabinet top board upper plate body 31 connected vertically, one with chassis backplane lower body 33 connected vertically, upper plate body 31 is connected with the middle plate body 32 of lower body 33 by horizontal positioned; Fixedly connected with the panel of cabinet both sides respectively in two ends, interlayer 3 left and right sides, interlayer 3 forms preceding storehouse 1 with front door 5, and interlayer 3 forms storehouse 2, back with Rear Door; The upper parallel in preceding storehouse 1 is provided with one for the fixed head 4 that the IGBT power tube is installed in the upper plate body 31 of interlayer 3, fixedlys connected with the panel of casing both sides by screw in its both sides, and this fixed head 4 forms first heat dissipation wind channel with the panel of interlayer 3 and casing both sides; The bottom of first heat dissipation wind channel is equipped with the first fan group 10 between interlayer 3 and described fixed head 4, its top is provided with louvre 11 at the top board of cabinet, this first fan group 10 constitutes the air inlet of first heat dissipation wind channel, and louvre 11 constitutes the air outlet of first heat dissipation wind channel; The front door 5 of cabinet is provided with the air inlet that leads to preceding storehouse 1.
As can be seen from Figure 2, the second fan group, 20, the second fan groups 20 that are provided with for exhausting at the top board of cabinet in the back storehouse 2 are installed in a top board side in storehouse 2 backwards from bottom to top, so that the dismounting maintenance.Be provided with the air inlet 21 that leads to storehouse 2, back at chassis backplane, air inlet 21 is larger-size square opening, can fly net be installed at air inlet 21 places of chassis backplane.Sidewall is respectively equipped with the air inlet 22 that leads to storehouse 2, back around cabinet bottom, and the through hole that is shaped as strip of air inlet 22, array are arranged on around the cabinet bottom on the sidewall.Both sides panel and the rear board of interlayer 2, cabinet surround second heat dissipation wind channel, and the louvre of sidewall setting constitutes the air inlet of this second heat dissipation wind channel around chassis backplane and the bottom, and the second fan group 20 of installing on the top board constitutes air outlet.
In one embodiment, from Fig. 1 and Fig. 2 as can be seen, middle plate body 32 two ends are connected (can certainly several plate bodys be connected by welding manner) by screw respectively with described upper plate body 31, lower body 33.Middle plate body 32 comprises the tilting section of fixedlying connected with upper plate body 31 and the horizontal segment of fixedlying connected with lower body 33.The interlayer 3 that upper plate body 31, middle plate body 32 and lower body 33 are combined into is isolated into independently preceding storehouse 1 and storehouse 2, back with cabinet, tilting section setting on the middle plate body 32, the wind-guiding (plate body 32 also can not adopt bending plate certainly, but adopts the panel that is obliquely installed) that is conducive to storehouse 2, back.Upper plate body 31 is equipped with fan power supply module 40 in a side in storehouse 2, back, upper plate body 31 is provided with below fan power supply module 40 be used to the removable fixation means of fixing the first fan group 10, adopt the device of drawer type in the present embodiment, in the storehouse, back, this device pull is come out, put into the first fan group 10 and fixing, again with this device together with the first fan group 10 push be positioned in the preceding storehouse 1 fixed head 4 under.Fan power supply module 40 is electrically connected with the first fan group 10, the second fan group 20 respectively.
In another embodiment, as can be seen from Figure 3, front door 5 is that two fan passes are crossed the panel of splitting that hinge is connected with cabinet, in front door 5, fixedly there is a dismountable baffle plate 6 bottom in preceding storehouse 1 by screw, baffle plate 6 is provided with the air inlet that leads to preceding storehouse, the through hole that is shaped as strip of this air inlet; Be positioned at the components and parts position of the switch of installing 1 bottom, preceding storehouse on the baffle plate 6 and be provided with through hole, the size of this through hole matches with the components and parts switch panel.The top adjacent with the bottom is respectively equipped with upper left door cover plate 7 and the upper right door cover plate 8 that can split in the preceding storehouse 1, be provided with the air inlet that leads to preceding storehouse by lower position on the panel of upper left door cover plate 7, be provided with the air inlet that leads to preceding storehouse by apical position on the panel of upper right door cover plate 8.Baffle plate 6, upper left door cover plate 7 and upper right door cover plate 8 cover whole preceding storehouse 1 towards the opening of front door 5.
From Fig. 3 and Fig. 4 as can be seen, the inboard that the top in preceding storehouse 1 is positioned at upper left door cover plate 7 also is provided with an inner plating 9 that is used for installing pcb board, is provided with the air inlet that leads to preceding storehouse by apical position on inner plating 9 panels.The left side of inner plating 9 is provided with a boss, and boss surface is connected with casing by hinge, upper left door cover plate 7 pass on left inner plating 9 left sides that hinge is connected near the position of boss, leave between inner plating 9 and the upper left door cover plate 7 end distance from.The right side of the left side of inner plating 9 and upper right door cover plate 8 is connected with casing by hinge respectively, makes it all can be around this hinge through.
In the present embodiment, the air inlet place on the front door 5 is provided with the ventilation filter assembly, and the air inlet place around the cabinet bottom is provided with fly net, and the Rear Door of cabinet is provided with the air inlet that leads to the storehouse, back.The upper plate body 31 of interlayer 3, middle plate body 32, lower body 33 adopt panel beating to make.
Elaborate below in conjunction with the radiating mode of accompanying drawing to this cabinet:
Electronic devices and components such as direct current branch switch, direct current master switch, alternating-current switch, copper bar, binding post, miniature circuit breaker, interchange lightning protection device, DC lightning prevention device at first are installed in the bottom in the preceding storehouse 1 of cabinet, and upper space is equipped with wire capacitance, wire capacitance copper bar and IGBT power tube; Behind cabinet, in the storehouse 2, electronic devices and components such as reactor, ac capacitor, contactor, copper bar are installed.
In the preceding storehouse 1, after the first fan group 10 was opened, the air in 10 pairs of preceding storehouses of the first fan group carried out exhausting, and air outside enters from the air inlet on the front door 5, most air can enter in preceding storehouse 1 lower space of cabinet through baffle plate 6, the cooling electronic component of installing for 1 bottom, preceding storehouse.The air of few part can enter 1 top, preceding storehouse by the left and right door cover plate 7,8 of going up, and the air inlet of upper right door cover plate 8 is at upside, dispels the heat in the bus capacitor top that can directly install for 1 top, preceding storehouse after air enters; Because in the present embodiment, the inboard of upper left door cover plate 7 also is equipped with inner plating 9, air is after the air inlet of upper left door cover plate 7 downsides enters, inner plating 9 surfaces of flowing through, dispel the heat to the pcb board of installing on it, air inlet by inner plating 9 upsides enters 1 top, preceding storehouse again, dispels the heat for the bus capacitor top of installing.
In preceding storehouse 1, the panel of the upper plate body 31 of interlayer, mounting panel and cabinet both sides surrounds first heat dissipation wind channel, because the cooling electronic component amount that install 1 bottom, preceding storehouse is extremely low, by 1 bottom, preceding storehouse enter air themperature promote and can ignore, by the first fan group 10 air is pumped in first heat dissipation wind channel again, be positioned at louvre 11 discharges that the cabinet top board is provided with by first heat dissipation wind channel, thereby dispel the heat for the IGBT power tube that is installed on the fixed head 4 in the air channel.Because the blast that the first fan group, 10 exhausting produce, flowing to the air of 1 top, preceding storehouse after the bus capacitor heat radiation can flow as the first fan group 10, with 1 bottom, preceding storehouse enter air converge by the first fan group 10 and send in first heat dissipation wind channel.
In the back storehouse 2, both sides panel and the rear board of interlayer 2, cabinet surround second heat dissipation wind channel, and the louvre of sidewall setting constitutes the air inlet of this second heat dissipation wind channel around chassis backplane and the bottom, and the second fan group 20 of installing on the top board constitutes air outlet.After the second fan group 20 starts, the second fan group 20 of air in the back storehouse 2 through being installed in the cabinet top board is retracted to the cabinet outside, in storehouse 2, back, produce pressure, air outside is after the air inlet 22 on the sidewall enters around the cabinet bottom, be provided with in the back storehouse 2 that air inlet 21 enters cabinet by chassis backplane again, air flows to the second fan group 20 that is installed in the cabinet top board straight from the air inlet 21 that chassis backplane is provided with, and takes the heat that electronic devices and components distribute out of cabinet.
After the middle plate body 32 of interlayer 3 adopts inclined design, be conducive to air flowing in this second heat dissipation wind channel, avoided producing the phenomenon that refluxes because of horizontally disposed.
The present invention compared with prior art the invention has the advantages that:
One, adopts two air duct radiations, reactor, transformer and IGBT power tube are in independently in the air channel, independently heat radiation respectively, thereby make the temperature at reactor, transformer and the fast IGBT of power mould place reduce greatly, thereby improve its efficient, prolong the useful life of machine, simultaneously improved in the life-span of fan greatly, reduce the cost of fan.
Two, simple in structure, easy to maintenance.
Three, Qian Cang and storehouse, back are independent of one another, and when reducing the aircraft bombing of IGBT power tube, its fragment can cause the risk of reactor, transformer secondary blast.
Four, Qian Cang and storehouse, back shield fully, can make the sine wave of reactor generation and the rectangular wave shielding mutually of IGBT generation, can not influence each other, and can make the performance raising of machine.
Five, the heat radiations such as power module, bus capacitor, switch, bus copper bar, copper bar of pcb plate, the power supply of control cabinet can be effectively given in the air channel in this cabinet design, and machine efficiency and performance are improved greatly.
Six, adopt double duct system, air intake around transformer, reactor air channel are adopted from the bottom; IGBT constant power module adopts from the front air intake.Like this, the dust of rack inside is reduced greatly, reduce some risks, and windage is protected the heat radiation of raising machine, thereby performance and the efficient of raising machine.Because the ability of reactor and the anti-dust of transformer is far longer than (PCC) power and circuit board, thus can do dust guard for respectively the air inlet in storehouse, front and back, or only in front the air inlet on the plate do dust guard.