CN219499847U - Protection heat radiation system and energy storage converter - Google Patents

Abstract

The utility model relates to a protection heat dissipation system and an energy storage converter, wherein the protection heat dissipation system comprises: the protective cabinet comprises a cabinet body and a baffle plate, wherein the cabinet body is provided with a containing cavity, the baffle plate is arranged in the containing cavity and connected with the cabinet body so as to divide the containing cavity into a first cavity and a second cavity, and the cabinet body is provided with an air inlet and an air outlet which are communicated with the first cavity; the heat exchanger is arranged on the partition plate and comprises a cold end and a hot end, wherein the cold end is positioned in the first chamber, and the hot end is positioned in the second chamber; the fan assembly comprises an outer circulating fan arranged in the first cavity and an inner circulating fan arranged in the second cavity, wherein the outer circulating fan drives external air flow to enter the first cavity from an air inlet, flow through a cold end and be discharged from an air outlet, and the inner circulating fan drives internal air flow in the second cavity to flow and be in circulating contact with the hot end. The utility model can ensure the protection of various functional devices and improve the safety performance of the applied electric appliance cabinet bodies such as the energy storage converter and the like.

Description

Protection heat radiation system and energy storage converter

Technical Field

The utility model belongs to the technical field of energy storage and current transformation, and particularly relates to a protection heat dissipation system and an energy storage current transformer.

Background

The functional devices of some electrical cabinet bodies need to be protected during operation, and corresponding heat dissipation systems are required to be arranged for heat dissipation and cooling so as to ensure that the electrical cabinet bodies can normally operate.

Taking an energy storage converter as an example, the energy storage converter (Power Conversion System, PCS) can control the charging and discharging processes of the storage battery to perform alternating current-direct current conversion, can directly supply power to an alternating current load under the condition of no power grid, and is widely applied to the fields of wind power and the like.

The protection heat dissipation system adopted by the existing electric appliance cabinet bodies such as the energy storage converter is usually an air conditioner or a fan arranged in the closed cabinet body, and the mode enables functional devices with high protection level requirements to be damaged by water vapor and dust, so that the safety performance of the electric appliance cabinet bodies such as the energy storage converter is affected.

Disclosure of Invention

The embodiment of the utility model provides a protection heat dissipation system and an energy storage converter, wherein the protection heat dissipation system can ensure the protection of all functional devices and improve the safety performance of an applied electrical cabinet body such as the energy storage converter.

In one aspect, an embodiment of the present utility model provides a protection and heat dissipation system, including: the protective cabinet comprises a cabinet body and a baffle plate, wherein the cabinet body is provided with a containing cavity, the baffle plate is arranged in the containing cavity and connected with the cabinet body so as to divide the containing cavity into a first cavity and a second cavity, and the cabinet body is provided with an air inlet and an air outlet which are communicated with the first cavity; the heat exchanger is arranged on the partition plate and comprises a cold end and a hot end, wherein the cold end is positioned in the first chamber, and the hot end is positioned in the second chamber; the fan assembly comprises an outer circulating fan arranged in the first cavity and an inner circulating fan arranged in the second cavity, wherein the outer circulating fan drives external air flow to enter the first cavity from an air inlet, flow through a cold end and be discharged from an air outlet, and the inner circulating fan drives internal air flow in the second cavity to flow and be in circulating contact with the hot end.

According to one aspect of the embodiment of the utility model, the air inlet is internally provided with the built-in air duct, the built-in air duct is provided with a first opening and a second opening, the first opening is in butt joint with the air inlet, and the second opening is higher than the first opening in height along the height direction of the cabinet body.

According to one aspect of the embodiment of the utility model, the protection heat dissipation system further comprises a filter layer, and the filter layer is arranged in the built-in air duct.

According to one aspect of the embodiment of the utility model, the built-in air duct is provided with the inclined sections and the vertical sections which are sequentially arranged and communicated with each other along the height direction, the first opening is formed on one side of the inclined section, which is away from the vertical section, the second opening is formed on one side of the vertical section, which is away from the inclined section, the cross section size of the inclined section is gradually increased from the first opening to the second opening, and the vertical section is a constant-section structure.

According to one aspect of an embodiment of the utility model, the orthographic projection of the built-in air duct on the baffle covers at least part of the cold end of the heat exchanger.

According to one aspect of the embodiment of the utility model, the air inlet is higher than the air outlet in the height direction of the cabinet body, and the external circulation fan is positioned between the air inlet and the air outlet.

According to one aspect of the embodiment of the utility model, the internal circulation fan is connected with the partition plate, and is arranged adjacent to the radiator along the height direction of the cabinet body, and the height of the hot end is higher than that of the internal circulation fan.

According to an aspect of the embodiment of the utility model, the protection and heat dissipation system further comprises a radiator, the radiator comprises a radiating fin and a base plate, the radiating fin is connected, the radiating fin is located in the first cavity and can exchange heat with external air flow flowing through the heat exchanger, the base plate is inserted into the second cavity and connected with the partition plate, and the base plate is used for being connected with devices located in the second cavity.

In another aspect, an embodiment of the present utility model provides an energy storage converter, including: the protection heat dissipation system; the first functional device group is arranged in the first chamber; the second functional device group is arranged in the second chamber; the external circulating fan drives external air flow to enter the first cavity through the air inlet, flow through the cold end and the first functional device group and are discharged through the air outlet, and the internal circulating fan drives air flow in the second cavity to circularly flow and be in circular contact with the hot end and the second functional device group.

According to another aspect of an embodiment of the present utility model, the first functional device group includes at least one of a reactor, an ac filter capacitor, and a control transformer, and the second functional device group includes at least one of a control board, a power board, an IGBT power component, and a filter.

According to the protection heat dissipation system and the energy storage converter provided by the embodiment of the utility model, the protection heat dissipation system comprises a protection cabinet, a heat exchanger and a fan assembly, the protection cabinet comprises a cabinet body and a partition board, a containing cavity of the cabinet body is partitioned by the partition board to form a first cavity and a second cavity, and an air inlet and an air outlet on the cabinet body can be communicated with the first cavity. In use, functional devices that are insensitive to moisture and dust may be placed in the first chamber and functional devices that are sensitive to moisture and dust may be placed in the second chamber. Because the heat exchanger sets up in the baffle and the cold junction is located first cavity and the hot junction is located the second cavity, simultaneously the fan subassembly is including setting up in the outer circulating fan in first cavity and setting up the inner circulating fan in the second cavity, can drive the inside air flow in the second cavity and with the functional device heat exchange back contact with the hot junction of heat exchanger that is located the second cavity through the inner circulating fan, will heat pass to the cold junction of heat exchanger through the hot junction.

Simultaneously, can drive outside air current and get into first cavity and flow through cold junction and the functional device that is located first cavity through the outer circulation fan, take away the heat of cold junction and the functional device that is located first cavity back and discharge by the gas outlet, can enough guarantee the radiating effect. Meanwhile, functional devices sensitive to water vapor and dust can be placed in the second cavity, the risk that the functional devices with high protection level requirements are damaged by the water vapor and the dust is prevented, and the safety performance of the electric appliance cabinet body such as the energy storage converter applied by the protection heat dissipation system is improved.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a protective heat dissipation system according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an energy storage converter according to an embodiment of the present utility model.

Wherein:

1-a protective heat dissipation system;

10-a protective cabinet; 11-a cabinet body; 111-a receiving cavity; 111 a-a first chamber; 111 b-a second chamber; 112-air inlet; 113-an air outlet; 12-a separator;

20-a heat exchanger; 21-cold end; 22-hot end;

30-a fan assembly; 31-an internal circulation fan; 32-an external circulation fan;

40-arranging an air duct; 40 a-a first opening; 40 b-a second opening; 41-an inclined section; 42-vertical section;

50-a heat sink; 51-heat radiating fins; 52-a substrate;

a 2-reactor; 3-an ac filter capacitor; 4-controlling the electric transformer; 5-control panel; 6-a power panel; 7-IGBT power components; an 8-filter; x-height direction.

In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the utility model are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the utility model by showing examples of the utility model. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present utility model; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The azimuth terms appearing in the following description are all directions shown in the drawings, and do not limit the specific structures of the protection heat dissipation system and the energy storage converter of the present utility model. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

The energy storage converter (Power Conversion System, PCS) can control the charging and discharging processes of the storage battery to perform alternating current-direct current conversion, can directly supply power for an alternating current load under the condition of no power grid, and consists of a DC/AC bidirectional converter, a control unit and other functional devices. The PCS controller receives a background control instruction through communication, and controls the converter to charge or discharge the battery according to the sign and the size of the power instruction, so that the active power and the reactive power of the power grid are regulated. The PCS controller is communicated with the BMS through the CAN interface to acquire the state information of the battery pack, so that the battery pack CAN be charged and discharged in a protective manner, the running safety of the battery is ensured, and the battery pack is widely applied to the fields of wind power and the like.

Functional devices such as an energy storage converter need to be protected during operation, and a corresponding heat dissipation system needs to be arranged for heat dissipation and cooling of the functional devices so as to ensure that the electrical cabinet body can normally operate. The protection heat dissipation system adopted by the existing electric appliance cabinet bodies such as the energy storage converter is usually an air conditioner or a fan arranged in the closed cabinet body, and the mode enables functional devices with high protection level requirements to be damaged by water vapor and dust, so that the safety performance of the electric appliance cabinet bodies such as the energy storage converter is affected.

Based on this, the embodiment of the application provides a protection heat dissipation system, which can ensure the protection of all functional devices and improve the safety performance of the applied electrical cabinet body such as the energy storage converter.

As shown in fig. 1, the protection and heat dissipation system provided in the embodiment of the application includes a protection cabinet 10 and a heat exchanger 20, the protection cabinet 10 includes a cabinet body 11 and a partition board 12, the cabinet body 11 has a containing cavity 111, the partition board 12 is disposed in the containing cavity 111 and is connected with the cabinet body 11, so as to separate the containing cavity 111 into a first chamber 111a and a second chamber 111b, and an air inlet 112 and an air outlet 113 which are communicated with the first chamber 111a are disposed on the cabinet body 11. The heat exchanger 20 is disposed on the partition 12, and the heat exchanger 20 includes a cold end 21 and a hot end 22, where the cold end 21 is located in the first chamber 111a and the hot end 22 is located in the second chamber 111b. The fan assembly 30 includes an outer circulation fan 32 disposed in the first chamber 111a and an inner circulation fan 31 disposed in the second chamber 111b, the outer circulation fan 32 driving an external air flow from the air inlet 112 into the first chamber 111a through the cold end 21 and out through the air outlet 113, the inner circulation fan 31 driving an internal air flow in the second chamber 111b to flow and be in circular contact with the hot end 22.

The protective cabinet 10 may have a polygonal frame structure. The partition 12 may partition the accommodating chamber 111 in the width direction of the cabinet body 11 to form a first chamber 111a and a second chamber 111b which are distributed left and right, however, in some embodiments, the partition 12 may partition the accommodating chamber 111 in the height direction X of the cabinet body 11 to form a first chamber 111a and a second chamber 111b which are distributed up and down.

The air inlet 112 and the air outlet 113 provided on the cabinet body 11 are both communicated with the first chamber 111a, and the air inlet 112 and the air outlet 113 are provided at intervals on the cabinet body 11, and may have a height difference in the height direction X of the cabinet body 11.

The hot end 22 and the cold end 21 of the heat exchanger 20 are communicated, and heat acquired by the hot end 22 can be transferred to the cold end 21.

The inner circulation fan 31 and the outer circulation fan 32 may use a power source such as a fan.

In the protection and heat dissipation system provided by the embodiment of the application, during use, functional devices insensitive to moisture and dust can be placed in the first chamber 111a, and functional devices sensitive to moisture and dust can be placed in the second chamber 111b. Since the heat exchanger 20 is disposed in the partition 12 and the cold end 21 is disposed in the first chamber 111a and the hot end 22 is disposed in the second chamber 111b, and the fan assembly 30 includes the outer circulation fan 32 disposed in the first chamber 111a and the inner circulation fan 31 disposed in the second chamber 111b, the inner air in the second chamber 111b can be driven to flow through the inner circulation fan 31 and contact the hot end 22 of the heat exchanger 20 after heat exchange with the functional devices disposed in the second chamber 111b, and heat is transferred to the cold end 21 of the heat exchanger 20 through the hot end 22.

Meanwhile, the external air flow can be driven to enter the first chamber 111a through the air inlet 112 by the external circulation fan 32, flow through the cold end 21 and the functional devices in the first chamber 111a, take away the heat of the cold end 21 and the functional devices in the first chamber 111a, and then be discharged through the air outlet 113, so that the heat dissipation effect can be ensured. Meanwhile, functional devices sensitive to water vapor and dust can be placed in the second chamber 111b, the risk that the functional devices with high protection level requirements are damaged by the water vapor and the dust is prevented, and the safety performance of the electrical cabinet body 11 such as the energy storage converter applied by the protection heat dissipation system is improved.

In some optional embodiments, in the protection and heat dissipation system provided in the embodiments of the present application, the air inlet 112 is provided with the built-in air duct 40, the built-in air duct 40 has a first opening 40a and a second opening 40b, the first opening 40a is in butt joint with the air inlet 112, and along the height direction X of the cabinet body 11, the height of the second opening 40b is higher than the height of the first opening 40 a.

The built-in air duct 40 may be disposed in the accommodating chamber 111, and the built-in air duct 40 may be connected to the cabinet body 11 by welding or an integral manner.

The size of the first opening 40a may be the same as the size of the second opening 40b, or one may be larger than the other.

According to the protection and heat dissipation system provided by the embodiment of the application, the built-in air duct 40 is arranged, so that external air flows enter the built-in air duct 40 from the air inlet 112 under the action of the external circulation fan 32 and are guided to the preset position by the built-in air duct 40, and the cooling and heat dissipation of the functional devices in the first chamber 111a are facilitated. Meanwhile, the height of the second opening 40b is higher than that of the first opening 40a, so that the air flows in a short-time rising process is realized, rain, snow, dust and the like slide downwards under the action of gravity, and the air cannot easily enter the second opening 40b with higher height, so that the safety performance of the protection heat dissipation system can be improved on the basis of ensuring the requirement of external air flow.

In some alternative embodiments, the protective heat dissipation system provided in the embodiments of the present application further includes a filter layer, and the filter layer is disposed in the built-in air duct 40.

The filter layer may be disposed at the first opening 40a or the second opening 40b, but may be disposed in a region between the first opening 40a and the second opening 40 b.

According to the protection and heat dissipation system provided by the embodiment of the application, the filter layer is arranged in the built-in air duct 40, so that external air flow which is about to enter the first chamber 111a can be filtered, water vapor, dust and the like mixed in the external air flow are filtered, and the protection level of the protection and heat dissipation system is improved.

In some optional embodiments, in the protective heat dissipation system provided in the embodiments of the present application, along the height direction X of the cabinet body 11, the built-in air duct 40 has an inclined section 41 and a vertical section 42 that are sequentially disposed and are mutually communicated, the first opening 40a is formed on a side of the inclined section 41 facing away from the vertical section 42, the second opening 40b is formed on a side of the vertical section 42 facing away from the inclined section 41, the cross-sectional dimension of the inclined section 41 is gradually increased from the first opening 40a to the second opening 40b, and the vertical section 42 is a uniform cross-sectional structure.

According to the protective heat dissipation system provided by the embodiment of the application, the built-in air duct 40 is arranged to be the inclined section 41 and the vertical section 42, and the size of the inclined section 41 is limited to be gradually increased, so that the height of the second opening 40b is higher than that of the first opening 40 a. Meanwhile, the inclined section 41 can be arranged in a slope, so that rain, snow, dust and the like entering the built-in air duct 40 from the first opening 40a can slide off easily under the action of gravity, and are not easy to accumulate in the built-in air duct 40, and the protection level is ensured. Meanwhile, by the arrangement mode, the corners of the built-in air duct 40 can be smaller, and flow obstruction caused when external air flows into the first chamber 111a due to abrupt change of the cross section of the built-in air duct 40 can be avoided.

In some alternative implementations, the present application provides a protective heat dissipation system in which the orthographic projection of the built-in air duct 40 on the baffle covers at least a portion of the cold end 21 of the heat exchanger 20. That is, the second opening 40b of the built-in air duct 40 is disposed at least partially opposite the cold end 21.

According to the protection and heat dissipation system provided by the embodiment of the application, through the arrangement, the external air flow flowing out from the second opening 40b of the built-in air duct 40 can flow to the cold end 21 in a shorter path, and performs heat exchange with the cold end 21, so that heat transferred from the hot end 22 of the radiator 50 to the cold end 21 is taken away, and the heat dissipation effect in the second chamber 111b is ensured.

In some alternative embodiments, along the height direction X of the cabinet body 11, the air inlet 112 is located at a higher level than the air outlet 113, and the external circulation fan 32 is located between the air inlet 112 and the air outlet 113.

Because the cold air flow is easy to drop and the hot air flow is easy to rise, by arranging the air inlet 112 above, the external air flow flowing out of the second opening 40b can quickly exchange heat with the cold end 21, then downwards run and flow to the air outlet 113, through the arrangement, the cooling and heat dissipation of the functional devices in the first chamber 111a can be ensured, meanwhile, the heat emitted by the functional devices in the first chamber 111a can be restrained from upwards running to influence the heat dissipation of the cold end 21, and the synchronous cooling and heat dissipation requirements of the functional devices in the first chamber 111a and the second chamber 111b can be ensured.

In some optional embodiments, in the protective heat dissipation system provided in the embodiments of the present application, the internal circulation fan 31 is connected to the partition 12, and along the height direction X of the cabinet body 11, the internal circulation fan 31 is disposed adjacent to the radiator 50, and the height of the hot end 22 is higher than the height of the internal circulation fan 31.

According to the protection heat dissipation system provided by the embodiment of the application, the internal circulation fan 31 is connected to the partition plate 12 and is arranged adjacent to the radiator 50, so that disturbance to internal air flow in the second chamber 111b can be realized, the internal air flow circularly flows in the second chamber 111b, and in the process of circulating flow, the hot end 22 is ensured to be positioned on a circulation path, and cooling to the internal air flow is facilitated.

In some alternative embodiments, the shielded heat dissipating system further includes a heat sink 50, the heat sink 50 including associated heat dissipating fins 51 and a base plate 52, the heat dissipating fins 51 being located in the first chamber 111a and capable of heat exchanging with an external air flow flowing through the heat exchanger 20, the base plate 52 being inserted into the second chamber 111b and connected to the partition 12, the base plate 52 being adapted to be connected to a device located in the second chamber 111b.

The base plate 52 of the radiator 50 may pass through the partition 12, a corresponding notch is provided on the partition 12, and the base plate 52 may be inserted into the notch and extend into the second chamber 111b, and the notch is closed.

According to the protection heat dissipation system, when the protection heat dissipation system is used, devices with larger heat productivity in the second chamber 111b can be connected with the substrate 52, heat is transferred to the heat dissipation fins 51 through the substrate 52, so that external air flow enters the first chamber 111a and can exchange heat with the heat dissipation fins 51 when the first chamber 111a flows through the heat dissipation fins 51, heat dissipation of the devices with larger heat productivity in the second chamber 111b is achieved, heat dissipation requirements of functional devices in the second chamber 111b are guaranteed, and protection heat dissipation level is improved.

As shown in fig. 2, on the other hand, the embodiment of the present application further provides an energy storage converter, which includes the protection heat dissipation system, the first functional device group and the second functional device group provided in the foregoing embodiments, where the first functional device group is disposed in the first chamber 111a, and the second functional device group is disposed in the second chamber 111b, and the external circulation fan 32 drives the external air flow from the air inlet 112 into the first chamber 111a, flows through the cold end 21 and the first functional device group, and is discharged from the air outlet 113, and the internal circulation fan 31 drives the air flow in the second chamber 111b to circularly flow and circularly contact with the hot end 22 and the second functional device group.

The energy storage converter that this embodiment provided can group its function device, makes it include first function device group and second function device group, can make the calorific capacity of first function device group be greater than the calorific capacity of second function device, also can make first function device group receive the harm risk of steam, dust less for the harm risk of second function device group.

Due to the fact that the protection and heat dissipation system provided by the embodiments is included, protection and heat dissipation effects of all functional devices can be guaranteed, meanwhile, the second functional devices with high risk of being damaged by water vapor and dust can be placed in the second chamber 111b, protection level is improved, and higher safety performance is achieved.

In some alternative embodiments, the energy storage converter provided in the embodiments of the present application, the first functional device group includes at least one of the reactor 2, the ac filter capacitor 3, and the control transformer 4, and the second functional device group includes at least one of the control board 5, the power board 6, the IGBT power component 7, and the filter 8.

The first functional device group may include the reactor 2, the ac filter capacitor 3, and the control transformer 4 at the same time, and the second functional device group may include the control board 5, the power board 6, the IGBT power module 7, and the filter 8 at the same time. The functions of the energy storage converter and the electrical connection relation between the functional devices are well established in the prior art, and are not described in detail herein.

According to the energy storage converter provided by the embodiment of the application, the devices included by the first functional device and the second functional device are limited, the energy storage converter is placed in the first chamber 111a, the heat productivity is relatively low, the damage risk caused by water vapor and dust is high, the energy productivity is relatively low, the damage risk caused by water vapor and dust is high, the heat dissipation and protection requirements of the devices are guaranteed, and the energy storage converter has a higher safety level.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A protective heat dissipation system (1), characterized by comprising:

the protective cabinet (10) comprises a cabinet body (11) and a partition board (12), wherein the cabinet body (11) is provided with a containing cavity (111), the partition board (12) is arranged in the containing cavity (111) and is connected with the cabinet body (11) so as to divide the containing cavity (111) into a first cavity (111 a) and a second cavity (111 b), and the cabinet body (11) is provided with an air inlet (112) and an air outlet (113) which are communicated with the first cavity (111 a);

the heat exchanger (20) is arranged on the partition plate (12), the heat exchanger (20) comprises a cold end (21) and a hot end (22), the cold end (21) is positioned in the first chamber (111 a) and the hot end (22) is positioned in the second chamber (111 b);

the fan assembly (30) comprises an outer circulation fan (32) arranged in the first chamber (111 a) and an inner circulation fan (31) arranged in the second chamber (111 b), the outer circulation fan (32) drives external air flow to enter the first chamber (111 a) through the air inlet (112) to flow through the cold end (21) and to be discharged through the air outlet (113), and the inner circulation fan (31) drives internal air flow in the second chamber (111 b) to flow and to be in circular contact with the hot end (22).

2. The protection and heat dissipation system (1) according to claim 1, wherein a built-in air duct (40) is provided in the air inlet (112), the built-in air duct (40) has a first opening (40 a) and a second opening (40 b), the first opening (40 a) is in butt joint with the air inlet (112), and the second opening (40 b) is higher than the first opening (40 a) in height along the height direction (X) of the cabinet body (11).

3. The protective heat dissipation system (1) according to claim 2, wherein the protective heat dissipation system (1) further comprises a filter layer, the filter layer being arranged in the built-in air duct (40).

4. The protection and heat dissipation system (1) according to claim 2, characterized in that, along the height direction (X), the built-in air duct (40) has inclined sections (41) and vertical sections (42) that are disposed successively and communicate with each other, the first opening (40 a) is formed at a side of the inclined sections (41) facing away from the vertical sections (42), the second opening (40 b) is formed at a side of the vertical sections (42) facing away from the inclined sections (41), and the cross-sectional dimensions of the inclined sections (41) are gradually increased from the first opening (40 a) to the second opening (40 b) at the side, and the vertical sections (42) are of a uniform cross-sectional structure.

5. The protective cooling system (1) according to claim 2, characterized in that the orthographic projection of the built-in air duct (40) on the partition (12) covers at least part of the cold end (21) of the heat exchanger (20).

6. The protection and heat dissipation system (1) according to claim 1, wherein, along the height direction (X) of the cabinet body (11), the air inlet (112) is located at a higher level than the air outlet (113), and the external circulation fan (32) is located between the air inlet (112) and the air outlet (113).

7. The protective heat dissipating system (1) according to any of claims 1 to 6, wherein the protective heat dissipating system (1) further comprises a heat sink (50), the heat sink (50) comprising connected heat dissipating fins (51) and a base plate (52), the heat dissipating fins (51) being located in the first chamber (111 a) and being capable of heat exchanging with the external air flow flowing through the heat exchanger (20), the base plate (52) being plugged into the second chamber (111 b) and being connected to the partition (12), the base plate (52) being adapted to be connected to a device located in the second chamber (111 b).

8. The protection and heat dissipation system (1) according to claim 7, wherein the internal circulation fan (31) is connected to the partition plate (12), and along the height direction (X) of the cabinet body (11), the internal circulation fan (31) is disposed adjacent to the heat sink (50), and the height of the hot end (22) is higher than the height of the internal circulation fan (31).

9. An energy storage converter, comprising:

the protective heat dissipation system (1) of any one of claims 1 to 8;

a first functional device group provided in the first chamber (111 a);

a second functional device group provided in the second chamber (111 b);

the external circulation fan (32) drives external air flow to enter the first chamber (111 a) from the air inlet (112), flow through the cold end (21) and the first functional device group and are discharged from the air outlet (113), and the internal circulation fan (31) drives air flow in the second chamber (111 b) to circularly flow and be in circular contact with the hot end (22) and the second functional device group.

10. The energy storage converter according to claim 9, wherein the first set of functional devices comprises at least one of a reactor (2), an ac filter capacitor (3) and a control electrical transformer (4), and the second set of functional devices comprises at least one of a control board (5), a power board (6), an IGBT power component (7) and a filter (8).