A high-protection heat dissipation power cabinet

Abstract

The present invention discloses a high-protection heat dissipation power cabinet, which includes a power cabinet main body, a first fan, a power module accommodated in the power cabinet main body, a thermosyphon heat exchanger, a reactor, a capacitor, and a second fan; the power module includes a power module main body and a thermosyphon radiator arranged on the power module main body. The high-protection heat dissipation power cabinet divides the interior of the power cabinet main body into two layers of cavities, and the two layers of cavities are used for spatial distribution and heat transfer of the power module radiator and the thermosyphon heat exchanger. While the power module radiator and the thermosyphon heat exchanger are performing spatial distribution and heat transfer, external heat exchange is carried out through the air duct interaction design that overlaps with the two back air intake cavities. While achieving high protection against salt spray and water, separate heat dissipation conduction of the power module and the capacitor reactor inside the power cabinet main body is realized. There is no material exchange between the power cabinet main body and the outside world, achieving IP54 protection, and it is suitable for high-corrosion and high-salt spray erosion environments such as offshore wind power.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics heat dissipation, and particularly to a high-protection heat dissipation power cabinet. Background Art

[0002] Currently, the common cooling methods for high-power inverters include air cooling and liquid cooling. Generally, air cooling technology refers to a cooling method in which air is forced to pass through the surface of a radiator under the drive of a fan, and power semiconductor devices are attached to an aluminum (or copper) radiator substrate to take away heat. This method is increasingly difficult to meet the heat dissipation requirements of high-power inverters due to the relatively poor heat dissipation capacity and large thermal resistance of the radiator, and is easily affected by the ambient temperature. Moreover, the inverter using air cooling is generally open as a whole and cannot meet the application requirements in scenarios such as high humidity and high salt mist. Liquid cooling technology, on the other hand, transfers heat from the converter to an external heat exchanger for air-cooled centralized heat dissipation through the strong heat-carrying capacity of the liquid under the drive of a water pump. Liquid cooling technology has strong heat dissipation capacity. With liquid cooling technology, the power density is high, and the entire cabinet of the inverter can be fully sealed to reach the IP54 protection level. However, liquid cooling technology has high costs, relatively poor reliability, and generally has a risk of leakage, resulting in high maintenance costs throughout the life cycle and also cannot be applied in scenarios such as offshore wind power with high humidity and high salt mist. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-protection heat dissipation power cabinet. The high-protection heat dissipation power cabinet is provided with two-layer cavities inside the power cabinet main body. The two-layer cavities perform spatial distribution of heat dissipation transfer for the power module radiator and the thermosyphon heat exchanger. While performing spatial distribution of heat dissipation transfer for the power module radiator and the thermosyphon heat exchanger, external heat exchange is carried out through the air duct interaction design laminated with two back air intake cavities. While achieving high protection against salt mist and water, separate heat dissipation conduction of the power modules and capacitor reactors inside the power cabinet main body is realized. There is no material exchange between the power cabinet main body and the outside world, achieving IP54 protection and being applicable to highly corrosive and high salt mist erosion environments such as offshore wind power.

[0004] To solve the above technical problem, the present invention provides a high-protection heat dissipation power cabinet, including a power cabinet main body, a first fan, a power module accommodated in the power cabinet main body, a thermosyphon heat exchanger, a reactor, a capacitor, and a second fan; the power module includes a power module main body and a thermosyphon radiator provided on the power module main body. The thermosyphon radiator is used to dissipate heat for the power module and the capacitor. The thermosyphon heat exchanger is used to dissipate heat for the reactor. The thermosyphon radiator includes a first condenser and a first evaporator. The thermosyphon heat exchanger includes a second condenser and a second evaporator;

[0005] The first fan is arranged on the top of the power cabinet body, the second fan is arranged on the upper part of the second evaporator, the capacitor is arranged on the power module, and the reactor is arranged under the second evaporator;

[0006] The first condenser is connected to the first evaporator through a first pipeline. A partition member is arranged inside the power cabinet body, and the partition member divides the power cabinet body into an upper cavity and a lower cavity. The first condenser is located in the upper cavity, and the capacitor, reactor, first evaporator, second fan and the thermosyphon heat exchanger are arranged inside the lower cavity. The first pipeline passes through the partition member. The area surrounded by the first condenser and the inner wall of the top of the power cabinet body is the air outlet cavity of the first condenser, and the area surrounded by the partition member and the first condenser is the air inlet cavity of the first condenser;

[0007] The first fan is communicated with the air outlet cavity of the first condenser;

[0008] The second evaporator and the second condenser are connected through a second pipeline. The second evaporator is arranged inside the power cabinet body, and the second condenser is arranged on the back of the power cabinet body;

[0009] The back of the power cabinet body is designed with a first back air inlet cavity and a second back air inlet cavity. The air outlet of the second condenser in the power cabinet body is communicated with the upper cavity through the first back air inlet cavity, and the air inlet cavity of the first condenser is communicated with the second back air inlet cavity. The second back air inlet cavity is arranged in a stacked manner on the first back air inlet cavity. An air inlet duct matching the first condenser is formed at a position of the second back air inlet cavity opposite to the first condenser, and the air inlet duct passes through the first back air inlet cavity;

[0010] The cold air entering from the second back air inlet cavity passes through the first condenser and then flows out from the first fan. The air outlet of the first fan is the air outlet of the power cabinet body;

[0011] The cold air entering from the second condenser passes through the first back air inlet cavity and then enters the air outlet cavity of the first condenser. The cold air entering from the second back air inlet cavity passes through the air inlet cavity of the first condenser and then enters the air outlet cavity of the second condenser. The air inlet of the second condenser and the air inlet of the second back air inlet cavity are the air inlets of the power cabinet body;

[0012] The first fan is a fan that sucks the gas in the power cabinet body to the outside;

[0013] A sealed structure that prevents salt spray and water is formed between the first pipeline, the second pipeline and the separation member and the main body of the power cabinet.

[0014] Preferably, the air inlet and the air outlet of the main body of the power cabinet are arranged on the same surface of the main body of the power cabinet.

[0015] Preferably, the first condenser is arranged on the upper part of the main body of the power module, the first evaporator is arranged on the lower part of the main body of the power module, the first condenser has two air inlet surfaces, and the two air inlet surfaces and the first evaporator form a Y-shaped structural layout.

[0016] Preferably, the first condenser is arranged on the upper part of the main body of the power module, the first evaporator is arranged on the lower part of the main body of the power module, and the first condenser is arranged horizontally above the first evaporator.

[0017] Preferably, a first heat dissipation circulation space is formed among the air inlet of the first fan, the air outlet of the first condenser, the air inlet of the second condenser and the main body of the power cabinet, and a second heat dissipation circulation space is formed among the air inlet of the first condenser, the air inlet of the second back air inlet cavity and the main body of the power cabinet.

[0018] Preferably, both the second evaporator and the second condenser are microchannel radiators.

[0019] Preferably, both the first condenser and the second condenser are subjected to salt spray resistant electrophoretic treatment.

[0020] Preferably, the first fan is arranged on the top of the main body of the power cabinet and is accommodated in the main body of the power cabinet.

[0021] Preferably, the high-protection heat dissipation power cabinet is accommodated in an inverter or a frequency converter, the air inlet of the main body of the power cabinet faces the air inlet of the inverter or the frequency converter, and the air outlet of the main body of the power cabinet faces the air outlet of the inverter or the frequency converter.

[0022] After adopting the above structure, a high-protection heat dissipation power cabinet includes a power cabinet main body, a first fan, a power module accommodated in the power cabinet main body, a thermosyphon heat exchanger, a reactor, a capacitor, and a second fan; the power module includes a power module main body and a thermosyphon radiator provided on the power module main body, and the thermosyphon radiator is used to dissipate heat from the power module and the capacitor, and the thermosyphon heat exchanger is used to dissipate heat from the reactor. The thermosyphon radiator includes a first condenser and a first evaporator, and the thermosyphon heat exchanger includes a second condenser and a second evaporator; the first fan is provided on the top of the power cabinet main body, the second fan is provided on the upper part of the second evaporator, the capacitor is provided on the power module, and the reactor is provided below the second evaporator; the first condenser is connected to the first evaporator through a first pipeline, and a partition member is provided inside the power cabinet main body, and the partition member divides the power cabinet main body into an upper cavity and a lower cavity. The first condenser is located in the upper cavity, and the capacitor, the reactor, the first evaporator, the second fan, and the second evaporator are provided inside the lower cavity. The first pipeline passes through the partition member. The area surrounded by the first condenser and the inner wall of the top of the power cabinet main body is the air outlet cavity of the first condenser, and the area surrounded by the partition member and the first condenser is the air inlet cavity of the first condenser; the first fan is communicated with the air outlet cavity of the first condenser; the second evaporator and the second condenser are connected through a second pipeline. The second evaporator is provided inside the power cabinet main body, and the second condenser is provided on the back of the power cabinet main body; the back of the power cabinet main body is designed with a first back air inlet cavity and a second back air inlet cavity. The air outlet of the second condenser is communicated with the upper cavity through the first back air inlet cavity, and the air inlet cavity of the first condenser is communicated with the second back air inlet cavity. The second back air inlet cavity is stacked on the first back air inlet cavity, and an air inlet duct matching the first condenser is formed at a position of the second back air inlet cavity opposite to the first condenser. The air inlet duct passes through the first back air inlet cavity; the cold air entering from the second back air inlet cavity passes through the first condenser and then flows out from the first fan. The air outlet of the first fan is the air outlet of the power cabinet main body; the cold air entering from the second condenser passes through the first back air inlet cavity and then enters the air outlet cavity of the first condenser. The cold air entering from the second back air inlet cavity passes through the air inlet cavity of the first condenser and then enters the air outlet cavity of the second condenser. The air inlet of the second condenser and the air inlet of the second back air inlet cavity are the air inlets of the power cabinet main body; the first fan is a fan that sucks the gas in the power cabinet main body to the outside; a sealed structure is formed between the first pipeline, the second pipeline, the partition member and the power cabinet main body.The high-protection heat dissipation power cabinet is provided with two layers of cavities inside the power cabinet body. The two layers of cavities are used for spatially distributing heat dissipation and transfer of the power module radiator and the thermosyphon heat exchanger. While the power module radiator and the thermosyphon heat exchanger are spatially distributing heat dissipation and transfer, external heat exchange is carried out through the air duct interaction design laminated with two back air intake cavities. While achieving high protection against salt spray and water, separate heat dissipation conduction of the power module and the capacitor reactor inside the power cabinet body is realized. There is no material exchange between the power cabinet body and the outside world, achieving IP54 protection, and it is applicable to high-corrosion and high-salt spray erosion environments such as offshore wind power. Brief Description of the Drawings

[0023] Figure 1 It is the overall structure diagram of a high-protection heat dissipation power cabinet according to Embodiment 1 of the present invention;

[0024] Figure 2 It is the left view of a high-protection heat dissipation power cabinet according to Embodiment 1 of the present invention;

[0025] Figure 3 It is the cross-sectional view of the air duct where the upper cavity of a high-protection heat dissipation power cabinet according to Embodiment 1 of the present invention is communicated with the second back air intake cavity;

[0026] Figure 4 It is the overall structure diagram of a high-protection heat dissipation power cabinet according to Embodiment 2 of the present invention;

[0027] Figure 5 It is the overall structure diagram of a high-protection heat dissipation power cabinet according to Embodiment 4 of the present invention;

[0028] Figure 6 It is the overall structure diagram of a high-protection heat dissipation power cabinet according to Embodiment 5 of the present invention;

[0029] Figure 7 It is the left view of a high-protection heat dissipation power cabinet according to Embodiment 5 of the present invention. Detailed Embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Embodiment 1

[0031] Please refer to Figures 1 to 3 , Figure 1 which is the overall structure diagram of a high-protection heat dissipation power cabinet according to Embodiment 1 of the present invention, Figure 2 which is the left view of a high-protection heat dissipation power cabinet according to Embodiment 1 of the present invention, Figure 3Cross-sectional view of the air duct connecting the upper cavity of a highly protected and heat-dissipating power cabinet and the second back air intake cavity in the first embodiment of the present invention;

[0032] This embodiment discloses a highly protected and heat-dissipating power cabinet, which includes a power cabinet main body 21, a first fan 11, a power module 15 accommodated in the power cabinet main body 21, a thermosyphon heat exchanger 17, a reactor 18, a capacitor, and a second fan 16; the power module 15 includes a power module main body and a thermosyphon radiator 14 provided on the power module main body, and the thermosyphon radiator 14 is used to dissipate heat from the power module and the capacitor, and the thermosyphon heat exchanger 17 is used to dissipate heat from the reactor. The thermosyphon radiator 14 includes a first condenser 141 and a first evaporator 142, and the thermosyphon heat exchanger 17 includes a second condenser 172 and a second evaporator 171;

[0033] The first fan 11 is provided at the top of the power cabinet main body 21, the second fan 16 is provided above the second evaporator 171, and the capacitor and the reactor 18 are provided below the second evaporator 171;

[0034] The first condenser 141 is connected to the first evaporator 142 through a first pipeline. A partition member 22 is provided inside the power cabinet main body 21, and the partition member 22 divides the power cabinet main body 21 into an upper cavity 12 and a lower cavity 13. The first condenser 141 is located in the upper cavity 12, and the capacitor, the reactor, the first evaporator 142, the second fan 16, and the second evaporator 171 are provided inside the lower cavity 13. The first pipeline passes through the partition member 22, and the area enclosed by the first condenser 141 and the inner wall of the top of the power cabinet main body 21 is the air outlet cavity of the first condenser 141, and the area enclosed by the partition member 22 and the first condenser 141 is the air inlet cavity of the first condenser 141;

[0035] The first fan 11 is communicated with the air outlet cavity of the first condenser 141;

[0036] The second evaporator 171 and the second condenser 172 are connected through a second pipeline. The second evaporator 171 is provided inside the power cabinet main body 21, and the second condenser 172 is provided on the back of the power cabinet main body 21;

[0037] The back of the power cabinet main body 21 is designed with a first back air intake cavity 19 and a second back air intake cavity 20. The air outlet of the second condenser 172 is communicated with the upper cavity 12 through the first back air intake cavity 19, and the air inlet cavity of the first condenser 141 is communicated with the second back air intake cavity 20. The second back air intake cavity 20 is stacked on the first back air intake cavity 19, and an air intake duct matching the first condenser 141 is formed at a position of the second back air intake cavity 20 opposite to the first condenser 141, and the air intake duct passes through the first back air intake cavity 19;

[0038] The cold air entering from the second back air inlet cavity 20 passes through the first condenser 141 and then flows out from the first fan 11. The air outlet of the first fan 11 is the air outlet of the power cabinet main body 21.

[0039] The cold air entering from the second condenser 172 enters the air outlet cavity of the first condenser 141 after passing through the first back air inlet cavity 19. The cold air entering from the second back air inlet cavity 20 enters the air outlet cavity of the second condenser 172 after passing through the air inlet cavity of the first condenser 141. The air inlets of the second condenser 172 and the second back air inlet cavity 20 are the air inlets of the power cabinet main body 21.

[0040] The first fan 11 is a fan that sucks the gas in the power cabinet main body 21 to the outside.

[0041] A sealed structure is formed between the first pipeline, the second pipeline and the partition member 22 and the power cabinet main body 21.

[0042] The air inlets and outlets of the power cabinet main body 21 are arranged on the same surface of the power cabinet main body 21.

[0043] The first condenser 141 is arranged on the upper part of the power module main body, and the first evaporator 142 is arranged on the lower part of the power module main body. The first condenser 141 has two air inlet surfaces, and the two air inlet surfaces and the first evaporator 142 form a Y-shaped structure layout.

[0044] The air inlet of the first fan 11, the air outlet of the first condenser 141, the air inlet of the second condenser 172 and the power cabinet main body 21 form a first heat dissipation circulation space. The air inlet of the first condenser 141, the air inlet of the second back air inlet cavity 20 and the power cabinet main body 21 form a second heat dissipation circulation space. Embodiment 2

[0045] Please refer to Figure 4 , Figure 4 which is the overall structure diagram of a highly protected and heat-dissipating power cabinet according to Embodiment 2 of the present invention;

[0046] Based on Embodiment 1, in this embodiment, the highly protected and heat-dissipating power cabinet of Embodiment 1 is placed in a converter or an inverter. The air inlet of the power cabinet main body 21 faces the air inlet of the converter or the inverter, and the air outlet of the power cabinet main body 21 faces the air outlet of the converter or the inverter. Embodiment 3

[0047] Based on Embodiment 1, in this embodiment, the first condenser 141 is arranged on the upper part of the power module main body, and the first evaporator 142 is arranged on the lower part of the power module main body. The first condenser 141 is arranged horizontally above the first evaporator 142. Example 4

[0048] Please refer to Figure 5 , Figure 5 , which is the overall structure diagram of a highly protected and heat-dissipating power cabinet according to Example 4 of the present invention;

[0049] This embodiment is based on Example 1. In this embodiment, both the second evaporator 171 and the second condenser 172 are microchannel radiators, and both the first condenser 141 and the second condenser 172 are subjected to salt spray resistant electrophoretic treatment. Example 5

[0050] Please refer to Figure 6 and Figure 7 , Figure 6 , which is the overall structure diagram of a highly protected and heat-dissipating power cabinet according to Example 5 of the present invention, Figure 7 and is the left view of a highly protected and heat-dissipating power cabinet according to Example 5 of the present invention.

[0051] This embodiment is based on Example 1. In this embodiment, the first fan 11 is arranged at the top of the power cabinet main body 21 and is accommodated within the power cabinet main body 21.

[0052] The highly protected and heat-dissipating power cabinet is provided with two layers of cavities inside the power cabinet main body. The two layers of cavities conduct space allocation and heat transfer for the power module radiator and the thermosyphon heat exchanger. While conducting space allocation and heat transfer for the power module radiator and the thermosyphon heat exchanger, external heat exchange is carried out through the interactive design of the air ducts laminated with two back air intake cavities. While achieving high protection against salt spray and water, separate heat conduction of the power modules and capacitor reactors inside the power cabinet main body is realized. There is no material exchange between the power cabinet main body and the outside, achieving IP54 protection, and is applicable to highly corrosive and high salt spray erosion environments such as offshore wind power.

[0053] It should be understood that the above are only the preferred embodiments of the present invention, and the patent scope of the present invention cannot be limited thereby. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A high-protection heat dissipation power cabinet, characterized in that It includes a power cabinet main body, a first fan, a power module housed in the power cabinet main body, a thermosyphon heat exchanger, a reactor, a capacitor, and a second fan; the power module includes a power module main body and a thermosyphon radiator provided on the power module main body, the capacitor is provided on the power module, the thermosyphon radiator is used to dissipate heat from the power module and the capacitor, the thermosyphon heat exchanger is used to dissipate heat from the reactor, the thermosyphon radiator includes a first condenser and a first evaporator, and the thermosyphon heat exchanger includes a second condenser and a second evaporator; The first fan is provided at the top of the power cabinet main body, the second fan is provided above the second evaporator, and the reactor is provided below the second evaporator; The first condenser is connected to the first evaporator through a first pipeline. A partition member is provided inside the power cabinet main body, and the partition member divides the power cabinet main body into an upper cavity and a lower cavity. The first condenser is located in the upper cavity, and the capacitor, the reactor, the first evaporator, the second fan, and the second evaporator are provided inside the lower cavity. The first pipeline passes through the partition member. The area enclosed by the first condenser and the inner wall of the top of the power cabinet main body is the air outlet cavity of the first condenser, and the area enclosed by the partition member and the first condenser is the air inlet cavity of the first condenser; The first fan is communicated with the air outlet cavity of the first condenser; The second evaporator and the second condenser are connected through a second pipeline. The second evaporator is provided inside the power cabinet main body, and the second condenser is provided on the back of the power cabinet main body; The back of the power cabinet main body is designed with a first back air inlet cavity and a second back air inlet cavity. The air outlet of the second condenser is communicated with the upper cavity through the first back air inlet cavity. The air inlet cavity of the first condenser is communicated with the second back air inlet cavity. The second back air inlet cavity is stacked on the first back air inlet cavity. An air inlet duct matching the first condenser is formed at the position of the second back air inlet cavity opposite to the first condenser, and the air inlet duct passes through the first back air inlet cavity; The cold air entering from the second back air inlet cavity passes through the first condenser and then flows out from the first fan. The air outlet of the first fan is the air outlet of the power cabinet main body; The cold air entering from the second condenser enters the air outlet cavity of the first condenser through the first back air inlet cavity. The cold air entering from the second back air inlet cavity enters the air outlet cavity of the second condenser through the air inlet cavity of the first condenser. The air inlet of the second condenser and the air inlet of the second back air inlet cavity are the air inlets of the power cabinet main body; The first fan is a fan that sucks the gas inside the power cabinet main body to the outside; A sealed structure is formed between the first pipeline, the second pipeline, the partition member and the power cabinet main body.

2. The high-protection heat dissipation power cabinet according to claim 1, wherein The air inlets and air outlets of the power cabinet main body are provided on the same surface of the power cabinet main body.

3. The high-protection heat dissipation power cabinet according to claim 1, characterized in that The first condenser is arranged on the upper part of the power module body, the first evaporator is arranged on the lower part of the power module body, the first condenser has two air inlet surfaces, and the two air inlet surfaces and the first evaporator form a Y-shaped structural layout.

4. The high-protection heat dissipation power cabinet according to claim 1, characterized in that, The first condenser is arranged on the upper part of the power module body, the first evaporator is arranged on the lower part of the power module body, and the first condenser is horizontally arranged above the first evaporator.

5. The high-protection heat dissipation power cabinet according to claim 1, characterized in that, The first fan air inlet, the first condenser air outlet, the second condenser air inlet, and the power cabinet body form a first heat dissipation circulation space, and the first condenser air inlet, the air inlet of the second back air inlet cavity, and the power cabinet body form a second heat dissipation circulation space.

6. The high-protection heat dissipation power cabinet according to claim 1, wherein, Both the second evaporator and the second condenser are microchannel radiators.

7. The high-protection heat dissipation power cabinet according to claim 1, characterized in that Both the first condenser and the second condenser are subjected to salt spray resistant electrophoretic treatment.

8. The high-protection heat dissipation power cabinet according to claim 1, characterized in that, The first fan is arranged on the top of the power cabinet body and accommodated in the power cabinet body.

9. The high-protection heat dissipation power cabinet according to claim 1, wherein The high protection heat dissipation power cabinet is accommodated in an inverter or a frequency converter. The air inlet of the power cabinet body faces the air inlet of the inverter or the frequency converter, and the air outlet of the power cabinet body faces the air outlet of the inverter or the frequency converter.

Images