Electrical module and electrical cabinet

Abstract

The utility model discloses an electrical module and an electrical cabinet, the electrical module is used for being arranged in a closed cabinet body, the electrical module comprises an outer cover, a piece to be cooled, an air-liquid heat exchanger and a cooling fan, the outer cover extends along the vertical direction, the upper part of the outer cover is provided with an air inlet, the bottom of the outer cover is provided with an air outlet, and the air inlet and the air outlet are both communicated with the interior of the cabinet body; a piece to be cooled is accommodated in the outer cover; the air-liquid heat exchanger is arranged in the outer cover, located at the bottom of the part to be cooled and provided with a plurality of air passing channels. And the heat dissipation fan is arranged at the air inlet and is used for driving air to flow to the air outlet from the air inlet through the air passing channel and circulate in the cabinet body. The electrical cabinet comprises the electrical module. According to the invention, the IP grade of the electrical cabinet is not affected, and the heat dissipation efficiency of other electrical parts in the electrical cabinet is not affected.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, specifically to an electrical module and an electrical cabinet. Background Technology

[0002] In MW-level photovoltaic inverters or energy storage converters, high-power devices such as reactors or transformers are among the most significant heat sources in power electronic equipment. With continuous technological advancements, the requirements for product power, IP rating, and size are becoming increasingly stringent, placing even higher demands on reactors, a crucial heat-generating component. Currently, the main heat dissipation methods are air cooling and liquid cooling. Air cooling requires external connectivity and necessitates air inlets and outlets on the electrical cabinet, significantly impacting its IP rating; liquid cooling, on the other hand, is costly. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and provide an electrical module and heat dissipation component that can dissipate heat for the component to be cooled without affecting the IP rating of the electrical cabinet or the heat dissipation efficiency of other electrical components in the electrical cabinet.

[0004] To achieve the above objectives, the present invention and its related embodiments adopt the following technical solutions, but are not limited to the following solutions:

[0005] The first technical solution and its related embodiments relate to an electrical module for placement within a closed cabinet, comprising an outer cover extending vertically, having an air inlet at its upper part and an air outlet at its bottom, both of which are connected to the interior of the cabinet; a component to be scald, housed within the outer cover; a wind-liquid heat exchanger placed within the outer cover and located at the bottom of the component to be scald, having several air passages; and a cooling fan installed at the air inlet, used to drive air from the air inlet through the air passages to the air outlet and circulate within the cabinet.

[0006] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the air inlet is located at the top of the outer cover and the axis of the cooling fan extends in the vertical direction.

[0007] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution. In this solution, the number of air inlets is at least two, the number of cooling fans is equal to the number of air inlets, and each cooling fan is installed at each air inlet in a one-to-one correspondence.

[0008] The fourth technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution. In this solution, the outer cover is provided with a receiving cavity for accommodating the heat dissipation component and an air collecting cavity located above the receiving cavity. The air collecting cavity is provided with a protrusion that protrudes horizontally relative to the receiving cavity, and the bottom of the protrusion is provided with the air inlet.

[0009] The fifth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution. In this solution, the number of protrusions is at least two, and each protrusion is provided with an air inlet. The number of cooling fans is equal to the number of air inlets, and each cooling fan is installed at each air inlet in a one-to-one correspondence. The axis of each cooling fan extends horizontally, and the axes of each cooling fan are parallel to or intersect each other.

[0010] The sixth technical solution is based on the fourth or fifth technical solution and is a preferred embodiment of the fourth or fifth technical solution. In this solution, the side of the protrusion is provided with an air-guiding wall, which is inclined outward from top to bottom relative to the vertical direction.

[0011] The seventh technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution. The outer cover includes a cover body and a support base. The upper part of the cover body has the air inlet, and the bottom of the cover body has an air outlet for vertical airflow. The support base includes two support legs extending in a horizontal first direction for fixed connection to the bottom wall of the cabinet. The two support legs are fixed to the bottom of the cover body and the heat-dissipating component on both sides of the air outlet in a horizontal second direction, the second direction being perpendicular to the first direction. The air outlet is formed between the two support legs. The air-liquid heat exchanger is fixed to the two support legs and located below the air outlet.

[0012] The eighth technical solution is based on the seventh technical solution and is a preferred embodiment of the seventh technical solution. In this solution, the cover is further provided with an air guide wall located above the air outlet. The air guide wall is inclined upward and outward from both sides of the air outlet along the second direction.

[0013] The ninth technical solution is based on the seventh technical solution and is a preferred embodiment of the seventh technical solution, wherein each air duct extends along the first direction and is arranged in the second direction; the air-liquid heat exchanger is suspended relative to the bottom wall of the cabinet.

[0014] The tenth technical solution and its related embodiments relate to an electrical cabinet, including a cabinet body and an electrical module as described in any one of the first to ninth technical solutions, wherein the outer cover is placed in the cabinet body.

[0015] As can be seen from the above description of the present invention and its specific embodiments, compared with the prior art, the technical solution of the present invention and its related embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In the first technical solution and related embodiments, the outer casing forms a closed structure around the component to be cooled. The cooling fan drives air into the outer casing through the air inlet, carrying away the heat from the component. The airflow temperature rises, and then flows through the air duct of the air-liquid heat exchanger to the air outlet, where the temperature drops again. Therefore, in this technical solution, although the component to be cooled is also cooled by air, the air-liquid heat exchanger ensures a lower temperature at the air outlet of the outer casing. Furthermore, the cold air flowing out of the air outlet circulates within the cabinet, resulting in a lower temperature when it re-enters the air inlet through the cabinet. This eliminates the need for the air inlet and outlet to be directly connected to the cabinet. The external enclosure is connected, and both the air inlet and outlet can be directly connected to the inside of the cabinet, resulting in a higher level of protection for the cabinet. Compared to pure liquid cooling, this application is also less expensive. In addition, the air-liquid heat exchanger is located at the bottom of the heat sink, which can also prevent damage to the heat sink components in case of leakage from the air-liquid heat exchanger. Therefore, when the electrical module of this technical solution is applied inside the cabinet, the protection level of the cabinet is not affected. Not only can the heat sink components inside the electrical module be cooled through air-cooled internal circulation inside the cabinet, but the outlet air temperature is also low, which has little impact on other electrical components inside the cabinet. It is low-cost and avoids the risk of leakage.

[0017] In the second technical solution and related embodiments, the air inlet is located at the top of the outer cover, and the axis of the cooling fan extends in the vertical direction, making assembly simpler.

[0018] In the third technical solution and its related embodiments, the number of air inlets is at least two, the number of cooling fans is equal to the number of air inlets, and each cooling fan is installed at each air inlet in a one-to-one correspondence, resulting in higher heat dissipation efficiency for the component to be cooled.

[0019] In the fourth technical solution and related embodiments, the air collection cavity is provided with a protrusion in the horizontal direction relative to the accommodating cavity. The bottom of the protrusion is provided with an air inlet, so that the cooling fan is located on the side of the outer cover. Compared with the cooling fan being located on the top of the outer cover, the height of the air collection cavity can be less than the height of the cooling fan, thereby reducing the height of the electrical module.

[0020] In the fifth technical solution and its related embodiments, the number of protrusions is at least two, and each protrusion is provided with an air inlet; the number of cooling fans is equal to the number of air inlets, and each cooling fan is installed at each air inlet in a one-to-one correspondence. The axis of the cooling fan extends in the horizontal direction, and the axes of each cooling fan are parallel or intersecting each other, so that the air collection cavity has multiple air intakes, the air intake volume is large, and the heat dissipation efficiency of the electrical module is higher; in addition, compared with the cooling fan axis extending in the vertical direction, the length of the protrusion can be reduced, thereby reducing the space occupied by the electrical module in the horizontal direction.

[0021] In the sixth technical solution and its related embodiments, the side of the protrusion is provided with an air-guiding wall, which is inclined outward from top to bottom relative to the vertical direction. The setting of the air-guiding wall allows the airflow to enter the air-collecting cavity more quickly, further improving the heat dissipation efficiency of the component to be scald.

[0022] In the seventh technical solution and its related embodiments, the outer cover structure is designed so that both the heat-dissipating component and the air-liquid heat exchanger are fixedly connected to the support base. Therefore, the cover can be made thinner and lighter, which is beneficial for processing and lower in cost. The air outlet is formed between the two support legs, and the air-liquid heat exchanger is fixedly connected to the two support legs and located below the air outlet. Therefore, even if the air-liquid heat exchanger leaks liquid, it will leak to the bottom wall of the cabinet and is unlikely to have a negative impact on other electrical components inside the cabinet.

[0023] In the eighth technical solution and its related embodiments, the cover is also provided with an air guide wall located above the air outlet. The air guide wall and the air outlet are inclined upward and outward on both sides along the second direction, so that the airflow can enter the air passage of the airflow heat exchanger more quickly, which is more conducive to reducing the outlet air temperature of the electrical module.

[0024] In the ninth technical solution and its embodiments, each air passage extends along the first direction and is arranged along the second direction that is perpendicular to the first direction and horizontal. The air-liquid heat exchanger is suspended relative to the bottom wall of the cabinet. Part of the airflow in the air passage flows directly to the air outlet, and part of it collides with the bottom wall before flowing to the air outlet. The air resistance is small, which is more conducive to air outlet and more conducive to reducing the air outlet temperature of the electrical module.

[0025] The tenth technical solution has the technical advantages of any one of the first to ninth technical solutions. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the electrical cabinet according to Embodiment 1 of this application;

[0028] Figure 2 for Figure 1 Side view;

[0029] Figure 3 for Figure 2 Sectional view along the AA direction;

[0030] Figure 4 This is a schematic diagram of the electrical cabinet according to Embodiment 2 of this application;

[0031] Figure 5 for Figure 4 Side view;

[0032] Figure 6 for Figure 5 Sectional view along the AA direction.

[0033] Explanation of key figure labels:

[0034] Cabinet 10; bottom wall 11; outer cover 20; cover body 21; protrusion 211; air intake wall 212; support base 22; support foot 221; air guide wall 23; air inlet 01; air outlet 02; air passage 03; accommodating cavity 04; air collection cavity 05; heat dissipation component 30; air-liquid heat exchanger 40; cooling fan 50. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0037] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0038] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0039] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0040] See Figure 1-3 , Figure 1-3 An electrical cabinet is shown, including a cabinet body 10 and an electrical module.

[0041] The cabinet 10 is rectangular in shape, with its length direction being a horizontal first direction and its width direction being a horizontal second direction, which is perpendicular to the first direction. The cabinet 10 has a bottom wall 11, and its inner cavity is a closed cavity after assembly.

[0042] The electrical module is housed inside the cabinet 10 and includes an outer cover 20, a heat-dissipating component 30, a wind-liquid heat exchanger 40, and a cooling fan 50.

[0043] The outer cover 20 extends vertically, with an air inlet 01 at its upper part and an air outlet 02 at its bottom. Both the air inlet 01 and the air outlet 02 are connected to the interior of the cabinet 10. Specifically, in this embodiment, see [reference needed]. Figure 3 The outer cover 20 includes a cover body 21 and a support base 22; the top of the cover body 21 is provided with an air inlet 01. Figure 3 In the case, the top of the cover 21 is provided with two air inlets 01, which are arranged along the second direction. The bottom of the cover 21 is provided with an air outlet 03 that allows air to pass through in the vertical direction. A receiving cavity 04 for accommodating the heat-dissipating component 30 is formed between the air inlets 01 and the air outlet 03. The support base 22 includes two support legs 221 that extend in the first horizontal direction for fixing to the bottom wall 11 of the cabinet 10. The two support legs 221 are fixed to the bottom of the cover 21 and the heat-dissipating component 30 on both sides of the air outlet 03 in the second horizontal direction. An air outlet 02 is formed between the two support legs 221. The cover 21 is also provided with an air guide wall 23 located above the air outlet 03. The air guide wall 23 is inclined upward and outward from both sides of the air outlet 03 in the second direction.

[0044] The heat dissipation component 30 is housed within the outer cover 20. In this embodiment, the heat dissipation component 30 is housed within the receiving cavity 04 of the cover 21. In this embodiment, the heat dissipation component 30 is a reactor.

[0045] The air-liquid heat exchanger 40 is placed inside the cover 21 and located at the bottom of the heat dissipation component 30. It is provided with several air passages. In this embodiment, the air-liquid heat exchanger 40 is fixedly connected to two support legs 221 and located below the air passage 03. Each air passage extends along the first direction and is arranged in the second direction. The air-liquid heat exchanger 40 is suspended relative to the bottom wall 11 of the cabinet 10.

[0046] The cooling fan 50 is fixed relative to the outer cover 20. It is used to drive the air from the air inlet 01 through the air duct to the air outlet 02 and circulate in the cabinet 10. In this embodiment, the cooling fan 50 is installed at the air inlet 01. The axis of the cooling fan 50 extends in the vertical direction. The number of cooling fans 50 is equal to the number of air inlets 01, and each cooling fan 50 is installed at each air inlet 01 in a one-to-one correspondence.

[0047] In this embodiment, the outer casing 20 forms a closed structure around the heat-dissipating component 30. The cooling fan 50 drives air into the outer casing 20 through the air inlet 01, carrying away the heat from the heat-dissipating component 30, causing the airflow temperature to rise. After passing through the air duct of the air-liquid heat exchanger 40, the airflow flows to the air outlet 02, where the temperature drops again. Therefore, in this technical solution, although the heat-dissipating component 30 also dissipates heat through air cooling, the air-liquid heat exchanger 40 ensures that the temperature at the air outlet 02 of the outer casing 20 is relatively low. Furthermore, the cold air flowing out of the air outlet 02 circulates within the cabinet 10, resulting in a lower temperature when it re-enters the air inlet 01 from within the cabinet 10. This eliminates the need for the air inlet 01 and air outlet 02 to be connected. The cabinet 10 is externally connected, and both the air inlet 01 and the air outlet 02 can be directly connected to the interior of the cabinet 10. The cabinet 10 has a higher protection level, and compared with the pure liquid cooling method, the cost of this application is lower. In addition, the air-liquid heat exchanger 40 is located at the bottom of the heat sink, which can also avoid damage to the heat sink 30 when the air-liquid heat exchanger 40 leaks. Therefore, when the electrical module of this technical solution is applied inside the cabinet 10, the protection level of the cabinet 10 is not affected. Not only can the heat sink 30 inside the electrical module be cooled through the air-cooled internal circulation inside the cabinet 10, but the outlet air temperature is also low, which has little impact on other electrical components inside the cabinet 10. It is low-cost and avoids the risk of leakage.

[0048] In this embodiment, the air inlet 01 is located on the top of the outer cover 20, and the axis of the cooling fan 50 extends in the vertical direction, making assembly simpler.

[0049] In this embodiment, there are at least two air inlets 01, and the number of cooling fans 50 is equal to the number of air inlets 01. Each cooling fan 50 is installed at each air inlet 01 in a one-to-one correspondence, so the heat dissipation efficiency of the heat dissipation component 30 is higher.

[0050] In this embodiment, the structure of the outer cover 20 is designed so that both the heat-dissipating component 30 and the air-liquid heat exchanger 40 are fixedly connected to the support base 22. Therefore, the cover 21 can be made thinner and lighter, which is beneficial for processing and lower in cost. The air outlet 02 is formed between the two support legs 221. The air-liquid heat exchanger 40 is fixedly connected to the two support legs 221 and located below the air outlet 03. Therefore, even if the air-liquid heat exchanger 40 leaks liquid, it will leak into the bottom wall 11 of the cabinet 10 and is unlikely to have a negative impact on other electrical components inside the cabinet 10.

[0051] In this embodiment, the cover 21 is also provided with an air guide wall 23 located above the air outlet 03. The air guide wall 23 is inclined upward and outward on both sides of the air outlet 03 in the second direction, so that the airflow can enter the air passage of the airflow heat exchanger more quickly, which is more conducive to reducing the outlet air temperature of the electrical module.

[0052] In this embodiment, each air duct extends along the first direction and is arranged along the second direction, which is perpendicular to the first direction and horizontal. The air-liquid heat exchanger 40 is suspended relative to the bottom wall 11 of the cabinet 10. Part of the airflow in the air duct flows directly to the air outlet 02, and part of it collides with the bottom wall 11 before flowing to the air outlet 02. The air resistance is small, which is more conducive to air outlet and more conducive to reducing the air outlet temperature of the electrical module.

[0053] Example 2

[0054] Example 2 has a structure that is basically the same as that of Example 1, except that, see [link to example]. Figure 4-6 The outer cover 20 has a housing 21 for accommodating the heat-dissipating component 30 and an air-collecting cavity 05 located above the housing 04. The air-collecting cavity 05 has a protrusion 211 that protrudes horizontally relative to the housing 04, and an air inlet 01 is provided at the bottom of the protrusion 211. There are at least two protrusions 211, and each protrusion 211 has an air inlet 01. The side of the protrusion 211 has an air-guiding wall 212, which is inclined outward from top to bottom relative to the vertical direction. The number of cooling fans 50 is equal to the number of air inlets 01, and each cooling fan 50 is installed at each air inlet 01 in a one-to-one correspondence. The axis of each cooling fan 50 extends horizontally, and the axes of each cooling fan 50 are parallel or intersecting each other. In this embodiment, the cooling fans 50 are centrifugal fans.

[0055] In this embodiment, the air collection cavity 05 is provided with a protrusion 211 that protrudes horizontally relative to the accommodating cavity 04. The bottom of the protrusion 211 is provided with an air inlet 01, so that the cooling fan 50 is located on the side of the outer cover 20. Compared with the cooling fan 50 being located on the top of the outer cover 20, the height of the air collection cavity 05 can be less than the height of the cooling fan 50, thereby reducing the height of the electrical module.

[0056] In this embodiment, there are at least two protrusions 211, and each protrusion 211 is provided with an air inlet 01. The number of cooling fans 50 is equal to the number of air inlets 01, and each cooling fan 50 is installed at each air inlet 01 in a one-to-one correspondence. The axis of the cooling fan 50 extends in the horizontal direction, and the axes of each cooling fan 50 are parallel or intersecting each other, so that the air collection cavity 05 has multiple air intakes, the air intake volume is large, and the heat dissipation efficiency of the electrical module is higher. In addition, compared with the cooling fan 50 extending in the vertical direction, the protrusion length of the protrusion 211 can be reduced, thereby reducing the space occupied by the electrical module in the horizontal direction.

[0057] In this embodiment, the side of the protrusion 211 is provided with an air-guiding wall 212. The air-guiding wall 212 is inclined outward from top to bottom relative to the vertical direction. The setting of the air-guiding wall allows the airflow to enter the air-collecting cavity 05 more quickly, further improving the heat dissipation efficiency of the electrical module.

[0058] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. An electrical module for placement within an enclosed cabinet (10), characterized in that, include The outer cover (20) extends vertically, with an air inlet (01) at the top and an air outlet (02) at the bottom. Both the air inlet (01) and the air outlet (02) are connected to the interior of the cabinet (10). The heat dissipation component (30) is housed within the outer casing (20); A wind-liquid heat exchanger (40), which is placed inside an outer casing (20) and located at the bottom of the heat-dissipating component (30), is provided with several air passages; and A cooling fan (50) is installed at the air inlet (01) and is used to drive the air from the air inlet (01) through the air duct to the air outlet (02) and circulate in the cabinet (10).

2. An electrical module as described in claim 1, characterized in that, The air inlet (01) is located on the top of the outer cover (20), and the axis of the cooling fan (50) extends in the vertical direction.

3. An electrical module as described in claim 2, characterized in that, The number of air inlets (01) is at least two, and the number of cooling fans (50) is equal to the number of air inlets (01), with each cooling fan (50) being installed at each air inlet (01) in a one-to-one correspondence.

4. An electrical module as described in claim 1, characterized in that, The outer cover (20) is provided with a receiving cavity (04) for accommodating the heat dissipation component (30) and an air collecting cavity (05) located above the receiving cavity (04). The air collecting cavity (05) is provided with a protrusion (211) protruding horizontally relative to the receiving cavity (04). The bottom of the protrusion (211) is provided with the air inlet (01).

5. An electrical module as described in claim 4, characterized in that, The number of protrusions (211) is at least two, and each protrusion (211) is provided with an air inlet (01); the number of cooling fans (50) is equal to the number of air inlets (01) and each cooling fan (50) is installed at each air inlet (01) in a one-to-one correspondence; the axis of each cooling fan (50) extends in the horizontal direction, and the axes of each cooling fan (50) are parallel to or intersect each other.

6. An electrical module as described in claim 4 or 5, characterized in that, The side of the protrusion (211) is provided with an air guide wall (212), which is inclined outward from top to bottom relative to the vertical direction.

7. An electrical module as described in claim 1, characterized in that, The outer cover (20) includes a cover body (21) and a support base (22); the upper part of the cover body (21) is provided with the air inlet (01), and the bottom of the cover body (21) is provided with an air outlet (03) for air to pass through in the vertical direction; The support base (22) includes two support legs (221) extending in a horizontal first direction for fixing to the bottom wall (11) of the cabinet (10). The two support legs (221) are fixed to the bottom of the cover (21) and the heat dissipation component (30) on both sides of the air vent (03) in a horizontal second direction, the second direction being perpendicular to the first direction. The air outlet (02) is formed between the two support legs (221). The air-liquid heat exchanger (40) is fixed to the two support legs (221) and located below the air vent (03).

8. An electrical module as described in claim 7, characterized in that, The cover (21) is also provided with an air guide wall (23) located above the air outlet (03), and the air guide wall (23) is inclined upward and outward from both sides of the air outlet (03) along the second direction.

9. An electrical module as described in claim 7, characterized in that, Each air duct extends along the first direction and is arranged in the second direction; the air-liquid heat exchanger (40) is suspended relative to the bottom wall (11) of the cabinet (10).

10. An electrical cabinet, characterized in that, Includes a cabinet (10) and an electrical module as claimed in any one of claims 1-9, wherein the outer cover (20) is placed inside the cabinet (10).

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