CN115133201A

CN115133201A - Rack module system

Info

Publication number: CN115133201A
Application number: CN202210604435.1A
Authority: CN
Inventors: 卢艺杰; 倪泽联; 赵晓航
Original assignee: Xiamen Kehua Digital Energy Tech Co Ltd
Current assignee: Xiamen Kehua Digital Energy Tech Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-09-30

Abstract

The invention provides a rack module system which is suitable for being installed in a box body, wherein a first ventilation window is arranged on the front wall or the rear wall of the box body, second ventilation windows are arranged on two side walls of the box body, the rack module system comprises a first rack, a second rack and two groups of power modules, the first rack and the second rack are arranged in the box body, the two groups of power modules are fixed on the first rack and the second rack back to back, the upper part and the lower part of each group of power modules are stacked up and down, a heat radiation fan is arranged on a front panel, close to the second ventilation window, of each power module, an air outlet is arranged on a rear panel, far away from the second ventilation window, the part, above and/or below the air outlet, of the rear panel is a closed area, the air outlet of one group of power modules is at least partially overlapped with the closed area of the other group of power modules, and a hot air duct suitable for radiating towards the first ventilation window is formed between the two groups of power modules. The rack module system provided by the invention can improve the density of the power modules arranged in a set installation space such as a box body and the overall heat dissipation capacity of the system.

Description

Rack module system

Technical Field

The invention belongs to the technical field of energy storage battery systems, and particularly relates to a rack module system.

Background

The energy storage battery system can well solve the problem of day and night power peak-valley difference, realizes the functions of stable output, peak-regulation frequency modulation and reserve capacity, and further meets the requirements of stable power generation of new energy, safe access to a power grid and the like, wherein the output part of the energy storage battery system mainly carries out voltage change and battery cluster protection through a power module (a DCDC module, namely a dc-dc power module, which is a power supply device for supplying power to a load on site).

At present, an energy storage battery system usually uses a container or a square cabin as an installation environment, and is limited by the requirement of the standard width of the container or the installation space of the square cabin, and a power module cannot be placed at high power density, for example, a conventional double-row back-to-back layout mode is adopted, because the hot air-out opposite blowing of two rows of modules can cause the air-out distance of a single module to be too small, and turbulent flow is formed between the two rows of modules, the heat dissipation efficiency of the single module can be influenced due to the increase of air-out resistance, and the heat in the installation space of the whole system can not be favorably dissipated to the outside of a box body, and finally the double standard exceeding of the internal temperature of a single-module chassis and the integral ambient temperature of the system can be caused, and the normal and continuous operation of the system can be influenced; although the air outlet distance of the modules can be increased by adopting the single-row layout mode, the redundancy of the single modules is too large, so that the power requirement is met, the installation space of the box body needs to be increased, and the situation conflicts with the current industrial standard.

Disclosure of Invention

The embodiment of the invention provides a rack module system, aiming at improving the density and the integral heat dissipation capacity of power modules arranged in a set installation space.

In order to achieve the purpose, the invention adopts the technical scheme that: the rack module system comprises a first rack, a second rack and two groups of power modules, wherein the first rack and the second rack are arranged in the box body in a back-to-back interval manner; two groups of power modules are respectively and fixedly connected to the first rack and the second rack, each group comprises a plurality of power modules which are stacked up and down, a heat radiation fan is arranged on the front panel of each power module, which is close to the second ventilation window, an air outlet is arranged on the rear panel, which is far away from the second ventilation window, the positions of the rear panel, which are above and/or below the air outlet, are closed areas, the air outlet of one group of power modules is at least partially overlapped with the closed area of the other group of power modules, and a hot air channel suitable for radiating towards the first ventilation window is formed between the two groups of power modules.

In one possible implementation manner, a first heat dissipation space is arranged above the power module at the top layer of the first rack, the first heat dissipation space dissipates heat towards the top of the first ventilation window, a second heat dissipation space is arranged below the power module at the bottom layer of the second rack, and the second heat dissipation space is suitable for dissipating heat towards the bottom of the first ventilation window; the power module on the top layer of the second rack discharges hot air towards the first heat dissipation space, and the power module on the bottom layer of the first rack discharges hot air towards the second heat dissipation space.

In some embodiments, each two power modules adjacent to each other up and down have a layer gap therebetween.

Exemplarily, a first exhaust port is formed in the bottom wall or the top wall of the power module and used for shunting cold air blown into the power module into the layer gap.

For example, the first exhaust port is a slit type port provided at a position close to the cooling fan, and the sealing strips are sealed at positions of the respective layer gaps between the front panel and the first exhaust port.

In a possible implementation, side gaps suitable for wiring are left between the two sides of each group of power modules and the front wall and the rear wall of the box.

In some embodiments, the two side walls of the power module are provided with second air outlets at positions close to the heat dissipation fan, and the two second air outlets are respectively used for shunting cold air blown into the power module into the two side gaps.

In some embodiments, a surrounding plate is packaged at the periphery of each group of power modules, and the surrounding plate is located between the second air outlet and the front panel or flush with the front panel, and is used for blocking two side gaps, blocking a gap between the top-layer power module and the top wall of the box body, and blocking a gap between the bottom-layer power module and the bottom wall of the box body.

Illustratively, at least one axial flow fan is arranged at the top and the bottom of each enclosure.

In some embodiments, gaps suitable for forming cold air channels are reserved between the two groups of power modules and the two second ventilation windows respectively.

The rack module system provided by the invention has the beneficial effects that: compared with the prior art, the rack module system has the advantages that two groups of power modules are respectively fixed on the first rack and the second rack in a back-to-back spaced arrangement mode, the structure is compact, the layout density of the power modules can be improved in a given box body internal space, and the system power requirement is met; because the air outlets and the closed area which are opposite to each other of the two groups of power modules have at least one partially overlapped area, thereby reducing the hot air turbulence generated in the hot air duct by the mutual opposite blowing of the outlet air of the two groups of power modules, meanwhile, the air outlet distance of the air outlet area overlapped by each group of power modules and the opposite side closed area can be the width of the whole hot air duct, thereby improving the local or integral hot air outlet distance of the power module by times without increasing the occupied space, meanwhile, the first frame and the second frame are in a staggered state by utilizing the staggered air outlet layout between the two groups of power modules, therefore, the heat dissipation of the power modules positioned at the topmost layer and the bottommost layer of the first rack and the second rack to the first ventilation window is facilitated, the internal heat dissipation capacity of all the single-power modules and the overall heat dissipation capacity of the system are improved, and the system can continuously and stably operate for a long time.

Drawings

Fig. 1 is a schematic perspective view of a rack module system according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a box body for mounting a rack module system according to an embodiment of the present invention;

fig. 3 is a schematic front view of a rack module system according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a schematic cross-sectional view taken along line C-C of FIG. 3;

fig. 7 is a schematic perspective view of a power module (housing or chassis) according to an embodiment of the present invention.

In the figure: 10. a first frame; 20. a second frame; 30. a power module; 301. a front panel; 302. a rear panel; 31. a heat radiation fan; 32. an air outlet; 33. a first exhaust port; 34. a second air outlet; 40. a hot air duct; 41. a first heat dissipation space; 42. a second heat dissipation space; 43. a layer gap; 44. side play; 50. a sealing strip; 60. enclosing plates; 70. an axial flow fan; 80. a cold air duct; 90. a wire rod; 100. a box body; 101. a first louver; 102. a second louver; 103. and (6) a frame.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 3 and fig. 7, a rack module system according to the present invention will now be described. The rack module system is suitable for being installed in a box body 100, a first ventilation window 101 is arranged on the front wall or the rear wall of the box body 100, second ventilation windows 102 are arranged on the two side walls, the rack module system comprises a first rack 10, a second rack 20 and two groups of power modules 30, wherein the first rack 10 and the second rack 20 are arranged in the box body 100 in a back-to-back spaced mode; two groups of power modules 30 are respectively fixedly connected to the first rack 10 and the second rack 20, each group includes a plurality of power modules 30 stacked up and down, a heat dissipation fan 31 is arranged on a front panel 301 of each power module 30 close to the second ventilation window 102, an air outlet 32 is arranged on a rear panel 302 far away from the second ventilation window 102, the part of the rear panel 302 above and/or below the air outlet 32 is a closed area, the air outlet 32 of one group of power modules 30 is at least partially overlapped with the closed area of the other group of power modules 30, and a hot air duct 40 suitable for dissipating heat towards the first ventilation window 101 is formed between the two groups of power modules 30.

Preferably, in this embodiment, the area occupied by the air outlet 32 on the power module 30 is smaller than or equal to the area of the closed area of the back panel 302, and the air outlet 32 and the closed area are distributed up and down, wherein the air outlet 32 of one group of power modules 30 faces the closed area of the other group of power modules 30.

It should be understood that the box 100 is usually a container or a shelter, in order to meet the heat dissipation requirement, a ventilation window (a louver is usually used to perform the functions of ventilation and water resistance) is usually required to be arranged on the peripheral wall of the box 100, and the installation of the ventilation window is necessarily fixed by using the frame 103, and just because the existence of the frame 103 makes the ventilation window unlikely to extend from the top edge to the bottom edge of the box 100, that is, the existence of the frame 103 affects the air permeability of the top and the bottom of the internal space of the box 100, which is also an important factor restricting the heat dissipation capability of the system, particularly for the topmost and bottommost power modules 30, the difficulty of heat dissipation is very large, in this embodiment, in order to ensure other functional layouts, only the first ventilation window 101 is arranged on the front wall or the rear wall of the box 100, and the second ventilation windows 102 are respectively arranged on the two side walls, because the heat dissipation fan of the power module 30 is disposed on the front panel 301 close to the second ventilation window 102, external cold air can enter the interior of the box 100 through the second ventilation window 102 under the action of the heat dissipation fan 31, and then enter the corresponding interior of the power module 30 for heat exchange, after heat exchange, the cold air is heated up to form hot air, which is discharged into the hot air duct 40 between the two sets of power modules 30 from the air outlet 32, and the hot air in the hot air duct 40 is finally discharged out of the box 100 through the first ventilation window 101.

It should be noted that, the corresponding relationship between the positions of the two sets of power modules may be understood as air outlet distribution that is staggered up and down, so as to satisfy that at least a part of the areas of the air outlet 32 of the power module 30 on the first rack 10 overlaps with the closed area of the power module 30 on the second rack 20, and certainly, the air outlet 32 may be completely aligned with the closed area at the opposite side thereof when conditions allow, so as to completely avoid the mutual interference between the air outlets of the two sets of power modules 30, specifically, referring to fig. 1 or fig. 3, each layer of power modules 30 on the first rack 10 is lower than the corresponding layer of power modules 30 on the second rack 20, so that the air outlets 32 of the two sets of power modules 30 are staggered up and down, when air is exhausted, hot air exhausted by the power modules 30 on the first rack 10 can be blown onto the closed area of the rear panel 302 of the power module 30 on the second rack 20, similarly, hot air exhausted from the power modules 30 in the second rack 20 can also be blown onto the enclosed area of the rear panel 302 of the power modules 30 in the first rack 10, it being understood that, in a conventional back-to-back, blow-to-back arrangement, because the air outlets 32 of the two sets of power modules 30 are completely opposite to each other, both of them can only have an air outlet distance of half the distance between them, in the present embodiment, the staggered air outlet manner is adopted, and the air outlet distance between the two is the whole distance (i.e. the width of the hot air duct 40), thereby forming an air outlet distance twice as long as the counter-blowing manner, and the increase of the air outlet distance can promote the hot air discharge efficiency of the power module 30, therefore, the heat dissipation capacity of the single power module 30 is improved, and the increase of the heat output of the single power module 30 can also promote the hot air duct 40 to accelerate the speed of discharging hot air from the first ventilation window 101, so that the overall heat dissipation capacity of the system is improved; in addition, because the top-bottom staggered air-out layout mode can make the top of the power module 30 at the topmost layer of the first rack 10 have a larger space, the power module 30 can be promoted to avoid the influence of the frame 103 and smoothly radiate heat to the first ventilation window 101, meanwhile, the power module 30 at the topmost layer of the second rack 20 can exhaust hot air towards the space, so that the problem that the power module 30 at the topmost layer of the second rack 20 cannot effectively radiate heat due to the blocking of the frame 103 of the ventilation window can be solved, similarly, the power modules 30 at the bottommost layers of the first rack 10 and the second rack 20 can also avoid the blocking problem of the frame 103 at the lower part of the ventilation window through the staggered air-out layout mode, and thus all the power modules 30 can be ensured to radiate heat efficiently.

Compared with the prior art, the rack module system provided by the embodiment has the advantages that two groups of power modules 30 are respectively fixed on the first rack 10 and the second rack 20 in a back-to-back spaced arrangement mode, the structure is compact, the layout density of the power modules 30 can be improved in a given internal space of the box 100, and the power requirement of the system is met; because the air outlets 32 and the closed area opposite to the two sets of power modules 30 have the area with at least a part of overlapping areas, hot air turbulence in the hot air duct 40 caused by mutual opposite blowing of the outlet air of the two sets of power modules 30 can be reduced or even avoided, and meanwhile, the outlet air distance between each set of power modules 30 and the area of the air outlet 32 overlapping with the opposite closed area can be the width of the whole hot air duct 40, so that the local or whole hot air outlet distance of the power modules 30 can be increased exponentially under the condition of not increasing the occupied space, and meanwhile, the first rack 10 and the second rack 20 can be in a high-low staggered state by utilizing the layout of staggered outlet air up and down between the two sets of power modules 30, so that the heat dissipation of the power modules 30 positioned at the topmost layer and the bottommost layer of the first rack 10 and the second rack 20 can be favorably realized to the first ventilation window, the internal heat dissipation capability of all the single power modules and the whole heat dissipation capability of the system can be improved, ensuring the continuous and stable operation of the system for a long time.

In some embodiments, referring to fig. 1 to 3, the first heat dissipation space 41 is provided above the power module 30 on the top layer of the first chassis 10, the first heat dissipation space 41 dissipates heat toward the top of the first ventilation window 101, the second heat dissipation space 42 is provided below the power module 30 on the bottom layer of the second chassis 20, and the second heat dissipation space 42 is adapted to dissipate heat toward the bottom of the first ventilation window 101; the power modules 30 at the top layer of the second rack 20 emit hot air toward the first heat dissipation space 41, and the power modules 30 at the bottom layer of the first rack 10 emit hot air toward the second heat dissipation space 42.

It should be understood that the first heat dissipation space 41 and the second heat dissipation space 42 are formed based on the layout manner of staggered air outlets between two sets of power modules 30, the topmost power module 30 of the first rack 10 can be lower than the frame 103 at the top of the first ventilation window 101 through the first heat dissipation space 41, so as to dissipate heat to the first ventilation window 101 smoothly, and meanwhile, the hot air of the topmost power module 30 of the second rack 20 is blown to the first heat dissipation space 41, on one hand, because the first heat dissipation space 41 provides a larger area of heat dissipation area, the heat dissipation efficiency of the topmost power module 30 of the second rack 20 can be improved, on the other hand, because the transverse airflow formed at the top of the hot air duct 40 can suppress the heat in the middle of the hot air duct 40 to rise into the first heat dissipation space 41, so that the heat in the middle of the hot air duct 40 is directly discharged from the first ventilation window 101 to the outside, heat accumulation in the first heat dissipation space 41 and the top of the hot air duct 40 is avoided; similarly, the second heat dissipation space 42 can make the power module 30 at the bottom layer of the second rack 20 higher than the frame 103 at the bottom of the first ventilation window 101, so as to align with the bottom of the window of the first ventilation window 101 for heat dissipation, and meanwhile, the hot air of the power module 30 at the bottom layer of the first rack 10 is blown to the second heat dissipation space 42, on one hand, because the second heat dissipation space 42 provides a larger heat dissipation area, the heat dissipation efficiency of the power module 30 at the bottom layer of the first rack 10 can be improved, and on the other hand, because the transverse airflow formed at the bottom of the hot air duct 40 can suppress the heat at the middle part of the hot air duct 40 from falling into the second heat dissipation space 42, the heat at the middle part of the hot air duct 40 is directly discharged to the outside of the cabin through the first ventilation window 101, and meanwhile, the heat at the bottom parts of the second heat dissipation space 42 and the hot air duct 40 is prevented from being accumulated; it can be seen that the first heat dissipation space 41 and the second heat dissipation space 42 formed by the staggered air outlet layout between the two sets of power modules 30 can avoid the blocking problem of the frame 103 of the ventilation window to the topmost and bottommost power modules 30, and avoid heat accumulation at the top and bottom of the hot air duct 40, thereby improving the self heat dissipation capability of the topmost and bottommost power modules 30 and the heat dissipation capability of the whole system.

In this embodiment, referring to fig. 3, a layer gap 43 is formed between every two adjacent power modules 30. By providing the layer gap 43, the top wall or the bottom wall of the single power module 30 (the wall of the module case) can be promoted to perform radiation heat exchange into the layer gap 43, so that the self heat dissipation capability of each power module 30 is promoted to be improved.

Further, as can be understood from fig. 3 and 7, in the embodiment, the bottom wall or the top wall of the power module 30 is provided with a first exhaust opening 33, and the first exhaust opening 33 is used for shunting the cold air blown into the power module 30 into the layer gap 43. It should be noted that, the power module 30 usually adopts an IP65 chassis, where the first exhaust opening 33 disposed on the top wall or the bottom wall of the power module 30 is opened on the wall of the chassis, and a part of cold air blown into the power module 30 by the heat dissipation fan 31 can be diverted into the layer gap 43 by the first exhaust opening 33, so as to blow away heat accumulated in the layer gap 43, thereby improving the heat dissipation capability of each power module 30.

For example, referring to fig. 3 to 7, the first exhaust opening 33 in this embodiment is a slit-type opening formed at a position close to the heat dissipation fan 31, and the sealing strips 50 are sealed at positions of the respective layer gaps 43 between the front panel 301 and the first exhaust opening 33. It should be understood that the slit-type air port is similar to an air knife structure and extends along the width direction of the chassis of the power module 30, cold air is blown into the layer gap 43 through the slit-type air port to cover the whole region of the layer gap 43, and meanwhile, the blocking effect of the sealing strip 50 is utilized to ensure that the air flow in the layer gap 43 is all blown into the hot air duct 40 from the front end (the position of the cooling fan 31) of the power module 30, on one hand, the bottom wall and the top wall of the two adjacent power modules 30 can be ensured to be cooled by the cold air, on the other hand, the air flow in the layer gap 43 can be utilized to form a pressing effect on the hot air in the hot air duct 40, so that the hot air blown out by the power module 30 is prevented from flowing back into the layer gap 43, or the hot air blown out of the opposite power module 30 enters the layer gap 43, and the heat dissipation capability of the power module 30 is improved.

In some possible implementations, referring to fig. 4 and 5, side gaps 44 suitable for wiring are left between both sides of each group of power modules 30 and the front wall and the rear wall of the box 100. It should be understood that although the two groups of power modules 30 are disposed in the air outlet layout with the corresponding layers staggered from top to bottom, they are aligned in the front-back direction of the box 100 and are disposed centrally with respect to the internal space of the box 100, so that a certain gap is left between the two sides of the power modules 30 and the front wall and the rear wall of the box 100, thereby facilitating wiring and avoiding the layout compactness of the power modules 30 due to the occupied space of the lines.

It should be noted that, in the present embodiment, please refer to fig. 4 to 7, the positions of the two side walls of the power module 30 close to the heat dissipation fan 31 are both provided with second air outlets 34, and the two second air outlets 34 are respectively used for shunting the cold air blown into the power module 30 to the two side gaps 44. Because the heating of the wire 90 is also an important heat source, and the heat dissipation performance of the wire 90 is very low, the diameter of the wire 90 needs to be increased under the high power requirement, and this will result in the increase of the cost of the wire 90 and the occupied space of the wiring, in view of this practical situation, a part of cold air blown into the power module 30 by the heat dissipation fan 31 can be diverted into the side gap 44 by setting the second air outlet 34, so as to heat-accumulate and blow away the wire 90 arranged in the side gap 44, reduce the temperature around the wire 90, and increase the load capacity of the wire 90 without increasing the wire diameter, thereby reducing the occupied space of the wiring, and ensuring that the box 100 can arrange more power modules 30 to meet the high power requirement of the system.

Further, referring to fig. 4 to 7, in the present embodiment, a surrounding plate 60 is enclosed on the periphery of each group of power modules 30, and the surrounding plate 60 is located between the second air outlet 34 and the front panel 301 or flush with the front panel 301 for blocking the two side gaps 44, and also for blocking the gap between the top layer of power modules 30 and the top wall of the box 100, and for blocking the gap between the bottom layer of power modules 30 and the bottom wall of the box 100.

The enclosing plate 60 is arranged to block the side gap 44 and the gaps at the top and the bottom of the power module 30, so that cold air blown into the side gap 44 can form air flow flowing from the enclosing plate 60 to the hot air duct 40, on one hand, the whole area of the two side walls of the power module 30 can be ensured to be subjected to the heat dissipation effect of the cold air, on the other hand, the air flow in the side gap 44 can be utilized to form a pressing effect on hot air in the hot air duct 40, and therefore hot air blown out by the power module 30 can be prevented from flowing back into the side gap 44, or hot air blown out to the power module 30 can enter the side gap 44, and the heat dissipation capability of the power module 30 and the heat dissipation effect of the wire 90 can be ensured; in addition, the enclosing plate 60 can separate the two second ventilation windows 102 from the two groups of power modules 30 by taking the front panel 301 (or a position close to the front panel 301) as a boundary, so that the strict cold and hot isolation of the inlet air and the outlet air of the power modules 30 is realized, the influence of the cross of the cold air and the hot air on heat dissipation is avoided, and the integral heat dissipation capability of the system can be improved.

It should be understood that the top and bottom of the box 100 are prone to heat collection, especially for the top of the box, due to the hot gas rising principle, the heat accumulation problem is prone to occur in the power module 30 at the top layer, and here, in order to avoid that the high temperature of the power module 30 at the top layer or the bottom layer affects the overall operation of the system, in this embodiment, referring to fig. 5 and 6, at least one axial flow fan 70 is disposed at the top and bottom of the two enclosing plates 60. When the top or bottom module has a high temperature due to the heat accumulation problem, the heat accumulation at the top and bottom of the box 100 can be quickly discharged by only turning on the axial fan 70, so that the temperature of the top power module 30 is quickly reduced, and the overall operation stability of the system is ensured.

In some embodiments, referring to fig. 1, a gap suitable for forming the cold air duct 80 is left between each of the two groups of power modules 30 and the two second ventilation windows 102. It should be understood that the premise of setting the cold air duct 80 lies in ensuring that the air-out distance between the two sets of power modules 30 is the condition of the distance between the two sets of power modules 30, and that sufficient clearance is kept in the front of the two sets of power modules 30 as far as possible to form the cold air duct 80, so that sufficient cold air can be ensured by utilizing the space area of the cold air duct 80, the efficiency of the cooling fan 31 is improved, and the problem that the air intake of the cooling fan 31 is small and the heat dissipation capability of the power modules 30 is reduced due to the undersized distance between the cooling fan 31 and the second ventilation window 102 is avoided.

It should be noted that, in this embodiment, as understood with reference to fig. 1 to 7, the layer gap 43 between the adjacent upper and lower power modules 30 is sealed by the sealing strip 50, the side gap 44 between the power module 30 and the front wall and the rear wall of the box 100, and the gap between the power module 30 and the top wall and the bottom wall of the box 100 are sealed by the shroud 60, so as to completely isolate the cold air duct 80 from the hot air duct 40, avoid crossing of the cold air and the hot air, and improve the heat dissipation capability of the whole system.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a frame module system, is suitable for and installs in the box, be equipped with first ventilation window on the antetheca of box or the back wall, all be equipped with second ventilation window on the both sides wall, its characterized in that, frame module system includes:

the first frame is arranged in the box body;

the second machine frame is arranged in the box body and is arranged back to back at intervals with the first machine frame;

two sets of power module, respectively fixed connection be in first frame with in the second frame, every group includes a plurality of from top to bottom range upon range of power module, each power module is close to be equipped with radiator fan on the front panel of second ventilation window, keep away from be equipped with the air outlet on the rear panel of second ventilation window, just the rear panel in the position of the top and/or the below of air outlet is closed area, and wherein a set of power module's air outlet and another group power module's closed area part at least overlaps, and is two sets of form between the power module and be suitable for the orientation the radiating hot-blast main of first ventilation window.

2. The rack module system according to claim 1, wherein the first rack top layer has a first heat dissipation space above the power modules, the first heat dissipation space dissipating heat toward a top of the first louvers, and the second rack bottom layer has a second heat dissipation space below the power modules, the second heat dissipation space being adapted to dissipate heat toward a bottom of the first louvers;

the power module on the top layer of the second rack discharges hot air towards the first heat dissipation space, and the power module on the bottom layer of the first rack discharges hot air towards the second heat dissipation space.

3. The rack module system of claim 1, wherein each two of said power modules adjacent one above the other have a layer gap therebetween.

4. The rack module system according to claim 3, wherein a first exhaust opening is formed in a bottom wall or a top wall of the power module, and the first exhaust opening is used for shunting cold air blown into the power module into the layer gap.

5. The rack module system according to claim 4, wherein the first exhaust port is a slit-type exhaust port formed at a position close to the heat dissipation fan, and a sealing strip is sealed at a position between the front panel and the first exhaust port in each of the layer gaps.

6. The rack module system according to claim 1, wherein a side gap suitable for wiring is left between both sides of each group of the power modules and the front and rear walls of the cabinet.

7. The rack module system according to claim 6, wherein the two sidewalls of the power module are respectively provided with a second air outlet at a position close to the heat dissipation fan, and the two second air outlets are respectively used for shunting cold air blown into the power module into the two side gaps.

8. The rack module system according to claim 7, wherein each group of the power modules is encapsulated at its periphery with a shroud between the second air outlet and the front panel or flush with the front panel for closing off the two side gaps, a gap between the top power module and the top wall of the box, and a gap between the bottom power module and the bottom wall of the box.

9. A rack module system as set forth in claim 8 wherein both the top and bottom of the enclosures are provided with at least one axial fan.

10. The rack module system according to any one of claims 1-9, wherein a gap adapted to form a cooling air duct is left between each of the two sets of power modules and each of the two second louvers.