Electrical box and air conditioning unit

Abstract

The application relates to an electric appliance box and an air conditioning unit, wherein the electric appliance box comprises a box body (1), a plurality of electric appliances (2) and a partition plate (3), the box body (1) is provided with a containing cavity (11), the plurality of electric appliances (2) are arranged in the containing cavity (11), the partition plate (3) is arranged in the containing cavity (11), the partition plate (3) is configured to divide the containing cavity (11) into a first cavity (12) and a second cavity (13), the temperature in the first cavity (12) is different from the temperature in the second cavity (13) when the electric appliance box is in a working state, a first communication part (14) for communicating the first cavity (12) and the second cavity (13) is arranged at a position close to a top wall of the containing cavity (11) in the containing cavity (11), a second communication part (15) for communicating the first cavity (12) and the second cavity (13) is arranged at a position close to a bottom wall of the containing cavity (11) in the containing cavity (11), and the gas in the first cavity and the gas in the second cavity flow circularly through the first communication part and the second communication part to exchange heat.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to an electrical box and an air conditioning unit. Background Technology

[0002] The air conditioner electrical box contains various components that generate heat during normal operation, such as PCB boards, frequency converters, power transformers, and various loose switching devices and voltage regulators.

[0003] To ensure the high protection performance of the electrical box, such as waterproofing and dustproofing, and to ensure the normal operation of electrical components, the structure of the electrical box needs to be sealed. However, the lack of external heat dissipation will cause the components to overheat and be damaged.

[0004] Therefore, ensuring that the temperature rise of the electronic components inside the sealed electrical box does not exceed the preset standard is a challenge.

[0005] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of this invention, and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art. The foregoing statements are only for providing background information related to this application and do not necessarily constitute prior art. Summary of the Invention

[0006] This invention provides an electrical box and an air conditioning unit, which can effectively reduce the local temperature of the electrical box.

[0007] According to a first aspect of the present invention, an electrical box is provided, comprising:

[0008] The box body has a receiving cavity inside;

[0009] Multiple electrical components are housed within the receiving cavity; and

[0010] A partition is disposed in the receiving cavity, and the partition is configured to divide the receiving cavity into a first cavity and a second cavity. When the electrical box is in operation, the temperature in the first cavity is different from the temperature in the second cavity. A first connecting part connecting the first cavity and the second cavity is provided near the top wall of the receiving cavity, and a second connecting part connecting the first cavity and the second cavity is provided near the bottom wall of the receiving cavity. The gas in the first cavity and the gas in the second cavity circulate through the first connecting part and the second connecting part to exchange heat.

[0011] In some embodiments, a first gap is formed between the top of the partition and the top wall of the receiving cavity, the first gap forming a first communication portion; and / or, a second gap is formed between the bottom of the partition and the bottom wall of the receiving cavity, the second gap forming a second communication portion.

[0012] In some embodiments, the partition is connected to the top wall of the receiving cavity, and a first through hole is provided on the partition near the top wall of the receiving cavity, the first through hole forming a first connecting portion; and / or, the partition is connected to the bottom wall of the receiving cavity, and a second through hole is provided on the partition near the bottom wall of the receiving cavity, the second through hole forming a second connecting portion.

[0013] In some embodiments, the temperature in the first cavity is greater than the temperature in the second cavity, and multiple electrical components are disposed in the first cavity; or, the total heat generation of the electrical components disposed in the first cavity is greater than the total heat generation of the electrical components disposed in the second cavity.

[0014] In some embodiments, the plurality of electrical devices include a first electrical device, a second electrical device, a third electrical device, and a fourth electrical device disposed within a first cavity. The heat generation of the first electrical device and the second electrical device are both greater than the heat generation of the third electrical device, and the heat generation of the first electrical device and the second electrical device are both greater than the heat generation of the fourth electrical device. The first electrical device and the second electrical device are disposed side by side near the bottom wall of the cavity, and the distance between the second electrical device and the bottom wall of the cavity is greater than the distance between the first electrical device and the bottom wall of the cavity. The third electrical device and the fourth electrical device are disposed side by side near the top wall of the cavity.

[0015] In some embodiments, the first electrical device and the second electrical device have the same structure, and the arrangement directions of the first electrical device and the second electrical device are 180° apart, so that the high temperature region of the first electrical device and the low temperature region of the second electrical device are arranged adjacent to each other.

[0016] In some embodiments, the bottom of the partition is substantially opposite to the centerline of the high-temperature zone of the first electrical device near the bottom wall of the receiving cavity, and the top of the partition is substantially opposite to the edges of the top walls of the third and fourth electrical devices away from the receiving cavity.

[0017] In some embodiments, the electrical box further includes a first heat sink and a second heat sink disposed within the receiving cavity, the first electrical component and the third electrical component are arranged opposite to each other, the second electrical component and the fourth electrical component are arranged opposite to each other, the first heat sink is disposed between the first electrical component and the third electrical component, and the second heat sink is disposed between the second electrical component and the bottom wall of the receiving cavity.

[0018] In some embodiments, the first radiator and the second radiator are configured such that the airflow blown out by the first radiator flows to the first electrical device and reaches the return air inlet of the second radiator, and the airflow blown out by the second radiator flows to the second electrical device, then flows through the fourth electrical device and the third electrical device and reaches the return air inlet of the first radiator.

[0019] In some embodiments, the air outlet of the first heat sink is arranged at an angle relative to the edge of the first electrical component, so that the air outlet of the first heat sink faces the second heat sink.

[0020] In some embodiments, the angle between the plane where the air outlet of the first heat sink is located and the edge line of the first electrical component near the third electrical component is 35° to 45°.

[0021] In some embodiments, there is a predetermined gap between the second heat sink and the bottom wall of the receiving cavity, and the side of the second heat sink away from the first heat sink is inclined toward the bottom wall of the receiving cavity, so that the outlet of the second heat sink faces the area between the second electrical device and the fourth electrical device and the side wall of the receiving cavity.

[0022] In some embodiments, the angle between the plane where the air outlet of the second heat sink is located and the edge line of the bottom wall of the second electrical device near the receiving cavity is 5° to 10°.

[0023] In some embodiments, the first electrical component, the second electrical component, the third electrical component, and the fourth electrical component are all disposed in the first cavity. In the direction perpendicular to the partition, the distance between the wall surface of the first cavity opposite to the partition and the partition, the height of the first heat sink, and the height of the second heat sink are substantially equal.

[0024] In some embodiments, the partition is provided with a third through hole, through which the top surface of the first heat sink is exposed.

[0025] In some embodiments, the electrical box further includes a control device connected to a first radiator, the first radiator having a first on-time temperature and a first off-time temperature, the control device being configured to control the first radiator to turn on when the ambient temperature is greater than or equal to the first on-time temperature, and to control the first radiator to turn off when the ambient temperature is less than or equal to the first off-time temperature, wherein the first on-time temperature is greater than the first off-time temperature; and / or, the control device is connected to a second radiator, the second radiator having a second on-time temperature and a second off-time temperature, the control device being configured to control the second radiator to turn on when the ambient temperature is greater than or equal to the second on-time temperature, and to control the second radiator to turn off when the ambient temperature is less than or equal to the second off-time temperature, wherein the second on-time temperature is greater than the second off-time temperature.

[0026] In some embodiments, the first opening temperature is 2°C to 5°C higher than the first closing temperature; and / or, the second opening temperature is 2°C to 5°C higher than the second closing temperature.

[0027] According to a second aspect of the present invention, an air conditioning unit is provided, including the aforementioned electrical box.

[0028] Based on the above technical solution, the embodiments of the present invention can divide the receiving cavity into a first cavity and a second cavity by setting a partition. By setting a first connecting part and a second connecting part, the airflow can be circulated in the first cavity and the second cavity, so that the high temperature zone and the low temperature zone can exchange heat, avoid the local temperature inside the box being too high, and achieve the effect of balancing the internal temperature of the box. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the electrical box provided by the present invention.

[0031] Figure 2 This is a schematic diagram of the partition arrangement structure in one embodiment of the electrical box provided by the present invention.

[0032] Figure 3 This is a side view of the internal structure of an embodiment of the electrical box provided by the present invention.

[0033] Figure 4 A schematic diagram showing the airflow circulating in the first and second chambers in one embodiment of the electrical box provided by the present invention.

[0034] Figure 5 This is a schematic diagram of the heating areas of various electrical components in one embodiment of the electrical box provided by the present invention.

[0035] Figure 6 A schematic diagram of gas flow within the first cavity of an embodiment of the electrical box provided by the present invention.

[0036] Figure 7 This is a schematic diagram of the partition structure in one embodiment of the electrical box provided by the present invention.

[0037] In the picture:

[0038] 1. Box body; 11. Receiving cavity; 12. First cavity; 13. Second cavity; 14. First connecting part; 15. Second connecting part; 2. Electrical components; 21. First electrical component; 22. Second electrical component; 23. Third electrical component; 24. Fourth electrical component; 25. Fifth electrical component; 26. Sixth electrical component; 3. Partition; 31. Top; 32. Bottom; 33. Third through hole; 4. First heat sink; 5. Second heat sink. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0041] refer to Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the electrical box provided by the present invention, the electrical box includes a box body 1, a plurality of electrical components 2 and a partition 3. The box body 1 is provided with a receiving cavity 11, the plurality of electrical components 2 are disposed in the receiving cavity 11, and the partition 3 is disposed in the receiving cavity 11. The partition 3 is configured to divide the receiving cavity 11 into a first cavity 12 and a second cavity 13. When the electrical box is in working state, the temperature in the first cavity 12 is different from the temperature in the second cavity 13. A first connecting part 14 connecting the first cavity 12 and the second cavity 13 is provided near the top wall of the receiving cavity 11, and a second connecting part 15 connecting the first cavity 12 and the second cavity 13 is provided near the bottom wall of the receiving cavity 11. The gas in the first cavity 12 and the gas in the second cavity 13 circulate through the first connecting part 14 and the second connecting part 15 to exchange heat.

[0042] In the embodiments provided by the present invention, by setting the partition 3, the receiving cavity 11 can be divided into a first cavity 12 and a second cavity 13. By setting the first connecting part 14 and the second connecting part 15, the airflow can be circulated in the first cavity 12 and the second cavity 13, so that the high temperature zone and the low temperature zone can exchange heat, avoid the local temperature inside the box 1 from being too high, and achieve the effect of balancing the temperature inside the box 1.

[0043] Specifically, such as Figure 4As shown, the first connecting part 14 is located inside the receiving cavity 11 near the top wall of the receiving cavity 11, and the second connecting part 15 is located inside the receiving cavity 11 near the bottom wall of the receiving cavity 11. Therefore, when the temperature inside the first cavity 12 is greater than the temperature inside the second cavity 13, the hot airflow inside the first cavity 12 rises and enters the second cavity 13 through the first connecting part 14, where it exchanges heat with the cold airflow inside the second cavity 13. After the heat exchange is completed, the cooling airflow sinks and then returns to the first cavity 12 through the second connecting part 15. This can cool down the high-temperature area inside the first cavity 12, thereby reducing the local high temperature inside the first cavity 12. Then, the airflow continues to rise after being heated, circulating between the first cavity 12 and the second cavity 13, thus achieving the effect of cooling down the high-temperature area inside the first cavity 12 using the low-temperature airflow inside the second cavity 13.

[0044] When the temperature in the second cavity 13 is higher than that in the first cavity 12, the airflow path is exactly the opposite. The hot airflow in the second cavity 13 rises and enters the first cavity 12 through the first connecting part 14, where it exchanges heat with the cold airflow in the first cavity 12. After the heat exchange is completed, the cooling airflow sinks and then returns to the second cavity 13 through the second connecting part 15. This can cool down the high-temperature area in the second cavity 13, thereby reducing the local high temperature in the second cavity 13. Then, the airflow continues to rise after being heated, circulating in the first cavity 12 and the second cavity 13, thus achieving the effect of cooling the high-temperature area in the second cavity 13 using the low-temperature airflow in the first cavity 12.

[0045] In this embodiment of the invention, the airflow forms a natural circulation between the first cavity 12 and the second cavity 13 through the first connecting part 14 and the second connecting part 15, without relying on the drive of airflow driving components such as fans. Therefore, energy consumption can be reduced, and the purpose of energy saving and environmental protection can be achieved.

[0046] In this embodiment of the invention, the temperature inside the first cavity 12 and the temperature inside the second cavity 13 when the electrical box is in operation can be measured using a thermometer, and the measurement can be performed after the temperature inside the first cavity 12 and the temperature inside the second cavity 13 have basically stabilized after the electrical box has been in operation for a period of time.

[0047] The temperatures within the first cavity 12 and the second cavity 13 can be real-time temperatures or average temperatures over a period of time. Furthermore, when the temperature distribution within the first cavity 12 and the second cavity 13 is uneven, the temperatures within the first cavity 12 and the second cavity 13 can be average temperatures at multiple different locations within the corresponding cavity. Of course, using local temperatures as the embodiment for the temperatures within the first cavity 12 and the second cavity 13 is also possible. In general, the difference between the temperatures within the first cavity 12 and the second cavity 13 lies in the driving force behind the circulating flow of air between the two cavities. This driving force can be the pressure or other forces that cause the airflow between the first cavity 12 and the second cavity 13.

[0048] In some embodiments, a first gap is formed between the top 31 of the partition 3 and the top wall of the receiving cavity 11, and the first gap forms a first connecting portion 14; and / or, a second gap is formed between the bottom 32 of the partition 3 and the bottom wall of the receiving cavity 11, and the second gap forms a second connecting portion 15.

[0049] By setting the first gap and the second gap, the first connecting part 14 and the second connecting part 15 can be formed, so as to realize the circulation of airflow in the first cavity 12 and the second cavity 13.

[0050] In this embodiment, the top 31 and bottom 32 of the partition 3 are not directly connected to the wall of the receiving cavity 11, and the two sides of the partition 3 are respectively connected to the side wall of the receiving cavity 11; or, the partition 3 can be connected to the front and rear side walls of the receiving cavity 11 through a support structure.

[0051] In some embodiments, the partition 3 is connected to the top wall of the receiving cavity 11, and a first through hole is provided on the partition 3 near the top wall of the receiving cavity 11, the first through hole forming a first connecting portion 14; and / or, the partition 3 is connected to the bottom wall of the receiving cavity 11, and a second through hole is provided on the partition 3 near the bottom wall of the receiving cavity 11, the second through hole forming a second connecting portion 15.

[0052] By providing a first through hole and a second through hole on the partition 3, both the first connecting part 14 and the second connecting part 15 can be formed, and the connection between the partition 3 and the box body 1 can be facilitated.

[0053] There are multiple options for separating the first cavity 12 and the second cavity 13. The distribution of multiple electrical components 2 within the first cavity 12 and the second cavity 13 can be flexible and can be determined according to actual needs.

[0054] For example, in some embodiments, the temperature inside the first cavity 12 is greater than the temperature inside the second cavity 13, and multiple electrical devices 2 are disposed inside the first cavity 12.

[0055] In some other embodiments, electrical components 2 are provided in both the first cavity 12 and the second cavity 13, wherein the total heat generation of the electrical components 2 provided in the first cavity 12 is greater than the total heat generation of the electrical components 2 provided in the second cavity 13, or the total heat generation of the electrical components 2 provided in the second cavity 13 is greater than the total heat generation of the electrical components 2 provided in the first cavity 12.

[0056] In some embodiments, the plurality of electrical devices 2 include a first electrical device 21, a second electrical device 22, a third electrical device 23, and a fourth electrical device 24 disposed in the first cavity 12. The heat generation of the first electrical device 21 and the second electrical device 22 are both greater than the heat generation of the third electrical device 23, and the heat generation of the first electrical device 21 and the second electrical device 22 are both greater than the heat generation of the fourth electrical device 24. The first electrical device 21 and the second electrical device 22 are disposed side by side near the bottom wall of the receiving cavity 11, and the distance between the second electrical device 22 and the bottom wall of the receiving cavity 11 is greater than the distance between the first electrical device 21 and the bottom wall of the receiving cavity 11. The third electrical device 23 and the fourth electrical device 24 are disposed side by side near the top wall of the receiving cavity 11.

[0057] In some embodiments, the first electrical device 21 and the second electrical device 22 have the same structure, and the arrangement directions of the first electrical device 21 and the second electrical device 22 are 180° apart.

[0058] like Figure 1 and Figure 2 As shown, the first electrical device 21 and the second electrical device 22 have the same structure, but their arrangement orientation in the first cavity 12 is different. The arrangement directions of the first electrical device 21 and the second electrical device 22 are 180° apart. That is to say, after the first electrical device 21 rotates 180° around its own center, it is exactly the same as the arrangement direction of the second electrical device 22.

[0059] like Figure 5 As shown, the first electrical device 21 includes heating area 1, heating area 2, heating area 3, and heating area 4. The second electrical device 22 has the same structure as the first electrical device 21, including heating area 5 corresponding to heating area 1, heating area 6 corresponding to heating area 2, heating area 7 corresponding to heating area 3, and heating area 8 corresponding to heating area 4. In the arrangement, the heating area 4 of the first electrical device 21 is located near the bottom wall of the receiving cavity 11, while heating areas 1 and 2 are located away from the bottom wall of the receiving cavity 11. The heating area 8 of the second electrical device 22 corresponding to heating area 4 of the first electrical device 21 is located away from the bottom wall of the receiving cavity 11, while the heating areas 5 and 6 of the second electrical device 22 corresponding to heating area 1 and heating areas 6 of the first electrical device 21 are located near the bottom wall of the receiving cavity 11.

[0060] By setting the arrangement directions of the first electrical device 21 and the second electrical device 22 to be 180° apart, the high-temperature area of ​​the first electrical device 21 and the high-temperature area of ​​the second electrical device 22 can be avoided from being too close. The high-temperature area of ​​the first electrical device 21 and the low-temperature area of ​​the second electrical device 22 are arranged adjacent to each other, so as to achieve the purpose of temperature balance and prevent local temperature from being too high.

[0061] In some embodiments, the bottom 32 of the partition 3 is substantially opposite to the centerline of the high-temperature zone of the first electrical device 21 near the bottom wall of the receiving cavity 11, and the top 31 of the partition 3 is substantially opposite to the edge of the top wall of the third electrical device 23 and the fourth electrical device 24 away from the receiving cavity 11.

[0062] Since the heat generation of the first electrical component 21 and the second electrical component 22 are both greater than the heat generation of the third electrical component 23, and the heat generation of the first electrical component 21 and the second electrical component 22 are both greater than the heat generation of the fourth electrical component 24, the above arrangement of the partition 3 can at least separate the first electrical component 21 and the second electrical component 22, which have higher heat generation, into the same chamber. This facilitates the separation of the receiving cavity 11 into high-temperature and low-temperature zones, thereby facilitating heat exchange in the subsequent airflow circulation. Simultaneously, the above arrangement of the partition 3 also promotes airflow formation such as... Figure 6 The circulating flow shown, combined with the placement of the first radiator 4 and the second radiator 5, allows the arrangement of the baffle 3 to concentrate the cooling airflow from the air outlets of the first radiator 4 and the second radiator 5 towards the target heat dissipation area, thus avoiding airflow dispersion and reducing the cooling effect.

[0063] In some embodiments, the electrical box further includes a first heat sink 4 and a second heat sink 5 disposed in the receiving cavity 11, a first electrical component 21 and a third electrical component 23 arranged opposite to each other, a second electrical component 22 and a fourth electrical component 24 arranged opposite to each other, a first heat sink 4 disposed between the first electrical component 21 and the third electrical component 23, and a second heat sink 5 disposed between the second electrical component 22 and the bottom wall of the receiving cavity 11.

[0064] By setting the first heat sink 4 and the second heat sink 5, the receiving cavity 11 can be actively cooled, reducing the overall temperature inside the receiving cavity 11 and effectively protecting the electrical components 2.

[0065] like Figure 6 As shown, in some embodiments, the first heat sink 4 and the second heat sink 5 are configured such that the airflow blown out by the first heat sink 4 flows to the first electrical device 21 and reaches the return air inlet of the second heat sink 5, and the airflow blown out by the second heat sink 5 flows to the second electrical device 22, then flows through the fourth electrical device 24 and the third electrical device 23 and reaches the return air inlet of the first heat sink 4.

[0066] By configuring the first heat sink 4 so that the airflow blown out by the first heat sink 4 flows to the first electrical component 21 and reaches the return air inlet of the second heat sink 5, the first electrical component 21 can be centrally cooled by the first heat sink 4, and the cooled airflow can reach the return air inlet of the second heat sink 5 and be sucked away by the return air inlet of the second heat sink 5, thus achieving the purpose of airflow circulation.

[0067] By configuring the second heat sink 5 such that the airflow blown out by the second heat sink 5 flows to the second electrical device 22, then through the fourth electrical device 24 and the third electrical device 23 and reaches the return air inlet of the first heat sink 4, the second electrical device 22 can be centrally cooled by the second heat sink 5, and the cooled airflow can continue to cool the fourth electrical device 24 and the third electrical device 23, and finally reach the return air inlet of the first heat sink 4 and be sucked away by the return air inlet of the first heat sink 4, thus achieving the purpose of airflow circulation.

[0068] In some embodiments, the air outlet of the first heat sink 4 is arranged at an angle relative to the edge of the first electrical component 21, so that the air outlet of the first heat sink 4 faces the second heat sink 5.

[0069] By setting the air outlet of the first heat sink 4 to be inclined relative to the edge of the first electrical component 21, the air outlet of the first heat sink 4 can be directed toward the second heat sink 5, so that the airflow blown out by the first heat sink 4 can be drawn into the return air outlet of the second heat sink 5 after cooling the first electrical component 21, so as to realize the circulation of airflow and avoid the airflow being unable to circulate due to the dissipation of energy at the end.

[0070] In some embodiments, the angle between the plane where the air outlet of the first heat sink 4 is located and the edge line of the first electrical device 21 near the third electrical device 23 is 35° to 45°, such as 35°, 40° or 45°.

[0071] Setting the angle between the plane where the air outlet of the first heat sink 4 is located and the edge line of the first electrical component 21 near the third electrical component 23 within the range of 35° to 45° can ensure that most of the airflow from the outlet of the first heat sink 4 can flow towards the direction of the first electrical component 21 and the second heat sink 5.

[0072] In some embodiments, there is a preset gap between the second heat sink 5 and the bottom wall of the receiving cavity 11, and the side of the second heat sink 5 away from the first heat sink 4 is inclined toward the bottom wall of the receiving cavity 11 so that the outlet of the second heat sink 5 faces the area between the second electrical device 22 and the fourth electrical device 24 and the side wall of the receiving cavity 11.

[0073] By setting the side of the second heat sink 5 away from the first heat sink 4 to be inclined toward the bottom wall of the receiving cavity 11, the outlet of the second heat sink 5 can be directed toward the area between the second electrical device 22 and the fourth electrical device 24 and the side wall of the receiving cavity 11, so that the airflow blown out by the second heat sink 5 can cool the second electrical device 22, and can also continue to flow forward to cool the area between the fourth electrical device 24 and the side wall of the receiving cavity 11, and finally flow through the fourth electrical device 24 and the third electrical device 23 to reach the return air inlet of the first heat sink 4.

[0074] In some embodiments, the angle between the plane where the air outlet of the second heat sink 5 is located and the edge line of the bottom wall of the second electrical device 22 near the receiving cavity 11 is 5° to 10°, such as 5°, 7°, 8° or 10°.

[0075] Setting the angle between the plane where the air outlet of the second heat sink 5 is located and the edge line of the bottom wall of the second electrical device 22 near the receiving cavity 11 is set in the range of 5° to 10°. This allows most of the airflow blown out from the second heat sink 5 to flow to the area between the second electrical device 22 and the fourth electrical device 24 and the side wall of the receiving cavity 11, while also preventing the distance between the second heat sink 5 and the bottom wall of the receiving cavity 11 from being too small, which would affect the airflow circulation.

[0076] In some embodiments, the first electrical component 21, the second electrical component 22, the third electrical component 23 and the fourth electrical component 24 are all disposed in the first cavity 12. In the direction perpendicular to the partition 3, the distance between the wall surface of the first cavity 12 opposite to the partition 3 and the partition 3, the height of the first heat sink 4 and the height of the second heat sink 5 are basically equal.

[0077] By setting the position of the partition 3 such that the distance between the partition 3 and the wall of the first cavity 12 opposite to the partition 3 is approximately equal to the height of the first radiator 4 and the second radiator 5, the air outlet area of ​​the first radiator 4 and the second radiator 5 can be maximized, avoiding a reduction in the air outlet area of ​​the first radiator 4 and the second radiator 5 due to the small distance between the partition 3 and the wall of the first cavity 12 opposite to the partition 3; it can also avoid gaps between the partition 3 and the top of the first radiator 4, which would affect the circulation path of the airflow in the first cavity 12.

[0078] like Figure 7 As shown, in some embodiments, the partition 3 is provided with a third through hole 33, and the top surface of the first heat sink 4 is exposed through the third through hole 33.

[0079] By setting the third through hole 33, interference between the partition 3 and the first radiator 4 can be effectively avoided, making it convenient to install the partition 3.

[0080] In some embodiments, the electrical box further includes a control device connected to a first radiator 4, the first radiator 4 having a first on-temperature and a first off-temperature, the control device being configured to control the first radiator 4 to turn on when the ambient temperature is greater than or equal to the first on-temperature and to control the first radiator 4 to turn off when the ambient temperature is less than or equal to the first off-temperature, wherein the first on-temperature is greater than the first off-temperature; and / or, the control device is connected to a second radiator 5, the second radiator 5 having a second on-temperature and a second off-temperature, the control device being configured to control the second radiator 5 to turn on when the ambient temperature is greater than or equal to the second on-temperature and to control the second radiator 5 to turn off when the ambient temperature is less than or equal to the second off-temperature, wherein the second on-temperature is greater than the second off-temperature.

[0081] By setting the first turn-on temperature to be greater than the first turn-off temperature and the second turn-on temperature to be greater than the second turn-off temperature, the frequent turning on and off of the first radiator 4 and the second radiator 5 can be avoided, which helps to improve the service life of the first radiator 4 and the second radiator 5.

[0082] In some embodiments, the first opening temperature is 2°C to 5°C higher than the first closing temperature; and / or, the second opening temperature is 2°C to 5°C higher than the second closing temperature.

[0083] Setting the temperature difference between the first opening temperature and the first closing temperature within the range of 2℃ to 5℃, and setting the temperature difference between the second opening temperature and the second closing temperature within the range of 2℃ to 5℃, can both prevent the first radiator 4 and the second radiator 5 from frequently opening and closing, and also prevent the first radiator 4 and the second radiator 5 from failing to open or close in a timely manner, thus affecting the temperature control effect inside the box 1.

[0084] The first radiator 4 and the second radiator 5 can be made of fans or blowers.

[0085] The following is in conjunction with the appendix Figures 1 to 7 The structure and cooling principle of one embodiment of the electrical box provided by the present invention will be described as follows:

[0086] like Figure 1 As shown, the electrical box includes a box body 1, and the interior of the box body 1 has a receiving cavity 11, in which multiple electrical components 2 are disposed. The multiple electrical components 2 include a first electrical component 21, a second electrical component 22, a third electrical component 23, a fourth electrical component 24, a fifth electrical component 25, and a sixth electrical component 26.

[0087] In this embodiment, the first electrical component 21 and the second electrical component 22 are identical circuit boards. The third electrical component 23 and the fourth electrical component 24 are also circuit boards, but their structures differ from those of the first electrical component 21 and the second electrical component 22. The heat source on the circuit board is primarily a common-mode choke. The fifth electrical component 25 and the sixth electrical component 26 are both reactors. The first electrical component 21, the second electrical component 22, the third electrical component 23, and the fourth electrical component 24 are all square block structures.

[0088] The first electrical component 21 and the second electrical component 22 are arranged parallel to each other near the bottom wall of the receiving cavity 11, and both are arranged parallel to the partition 3. The electrical connectors on the first and second electrical components 21 and 22 are installed on the side of the circuit board near the partition 3. The third electrical component 23 and the fourth electrical component 24 are arranged parallel to each other near the top wall of the receiving cavity 11, and both are arranged parallel to the partition 3. The electrical connectors on the third and fourth electrical components 23 and 24 are installed on the side of the circuit board near the partition 3. The fifth electrical component 25 and the sixth electrical component 26 are respectively located on both sides of the third and fourth electrical components 23 and 24. The third and fourth electrical components 23 and 24 are located between the fifth and sixth electrical components 25 and 26. The first electrical component 21 and the third electrical component 23 are substantially opposite each other, and the second electrical component 22 is opposite to the fourth electrical component 24 and the sixth electrical component 26. An empty area is provided on the side of the first electrical component 21 away from the second electrical component 22.

[0089] The upper and lower edges of the third electrical device 23 and the fourth electrical device 24 are flush, and the upper and lower edges of the third electrical device 23 and the fourth electrical device 24 are parallel to the top wall of the receiving cavity 11.

[0090] The first electrical component 21 and the second electrical component 22 are arranged vertically in a staggered manner, with the distance between the first electrical component 21 and the bottom wall of the receiving cavity 11 being less than the distance between the second electrical component 22 and the bottom wall of the receiving cavity 11. Furthermore, the arrangement directions of the first electrical component 21 and the second electrical component 22 differ by 180°, and after rotating the first electrical component 21 by 180°, its arrangement is identical to that of the second electrical component 22. The lower edges of the upper edges of both the first electrical component 21 and the second electrical component 22 are parallel to the bottom wall of the receiving cavity 11.

[0091] The first heat sink 4 is disposed between the first electrical component 21 and the third electrical component 23, and the second heat sink 5 is disposed between the second electrical component 22 and the bottom wall of the receiving cavity 11.

[0092] One end of the first heat sink 4 contacts the upper edge of the first electrical component 21, and the other end is inclined towards the third electrical component 23. The air outlet of the first heat sink 4 generally faces the second heat sink 5, but not directly towards it. The angle between the plane of the air outlet of the first heat sink 4 and the upper edge of the first electrical component 21 is 40°. This position facilitates the first heat sink 4 to prioritize heat dissipation for key components on the first electrical component 21, while the exhaust airflow behind the first heat sink 4 can also reach the third electrical component 23 and the fifth electrical component 25. One end of the second heat sink 5 contacts the lower edge of the second electrical component 22, and the other end is inclined towards the bottom wall of the receiving cavity 11. The angle between the plane of the air outlet of the second heat sink 5 and the lower edge of the second electrical component 22 is 5° to 10°. The air outlet of the second heat sink 5 faces the bus capacitor of the second electrical component 22 (i.e., such as...). Figure 5 The heating zone 5 shown can also take into account the sixth electrical device 26, the fourth electrical device 24 and the third electrical device 23.

[0093] like Figure 2 As shown, the top 31 of the partition 3 extends upward and just beyond the lower edges of the third electrical device 23 and the fourth electrical device 24. The bottom 32 of the partition 3 is basically flush with the center line of the common mode choke coil of the heating zone on the first electrical device 21 near the bottom wall of the receiving cavity 11, leaving sufficient space for the airflow circulation in the first cavity 12 and the second cavity 13.

[0094] like Figure 3 As shown, the electrical box is placed vertically, and the partition 3 divides the receiving cavity 11 into a first cavity 12 located on the right and a second cavity 13 located on the left. A first connecting portion 14 is formed above the partition 3, and a second connecting portion 15 is formed below the partition 3.

[0095] The first electrical component 21, the second electrical component 22, the third electrical component 23, the fourth electrical component 24, the fifth electrical component 25, the sixth electrical component 26, the first heat sink 4, and the second heat sink 5 are all disposed in the first cavity 12, and a small number of electrical control components with very low heat generation can be disposed in the second cavity 13.

[0096] The housing 1 contains a first mounting plate (e.g., a sheet metal part) for supporting the first electrical component 21 and the second electrical component 22. The second heat sink 5 can be mounted on the first mounting plate. The housing 1 also contains a second mounting plate for supporting the third electrical component 23, the fourth electrical component 24, the fifth electrical component 25, and the sixth electrical component 26. The distances of the first mounting plate and the second mounting plate from the wall of the receiving cavity 11 can be different.

[0097] The first radiator 4 and the second radiator 5 each have an on-time temperature and an off-time temperature. When the temperature sensor measures an ambient temperature higher than the on-time temperature, the radiator is controlled to turn on; when the temperature sensor measures an ambient temperature lower than the off-time temperature, the radiator is controlled to turn off. Setting the on-time temperature to be 2-5°C higher than the off-time temperature can prevent the radiator from frequently turning on and off.

[0098] like Figure 4 As shown, when both the first radiator 4 and the second radiator 5 are not in operation, the airflow path inside the electrical box is as follows: Due to the rising nature of hot air, the heat generated by each heat source in the first cavity 12 rises, then flows over the partition 3 along the first connecting portion 14 on the upper side of the partition 3, and is cooled in the second cavity 13. After cooling, the cold air sinks, flows over the partition 3 along the second connecting portion 15 at the lower edge of the partition 3, and arrives at the first cavity 12 to dissipate heat from the heating elements in the first cavity 12. At the same time, it absorbs heat and becomes hot air again, thus forming a natural circulating airflow field between the two cavities inside the electrical box, suppressing localized heating. This natural circulation method can reduce the wear and tear on the radiators, increase their service life, and improve the reliability of the electrical box.

[0099] like Figure 5 As shown, the heat sources on the first electrical component 21 and the second electrical component 22 are widely distributed, but the temperature rise priority of these components is the highest within the entire electrical box because they control the operation of key components of the air conditioning unit. The common-mode chokes on the third electrical component 23 and the fourth electrical component 24 have the second highest temperature rise priority. The fifth electrical component 25 and the sixth electrical component 26 have the third highest priority due to their higher temperature resistance. According to the priority, the first heat sink 4 and the second heat sink 5 prioritize heat dissipation for the first electrical component 21 and the second electrical component 22, but must also meet the heat dissipation needs of the third electrical component 23, the fourth electrical component 24, the fifth electrical component 25, and the sixth electrical component 26.

[0100] The first electrical component 21 and the second electrical component 22 have the same structure, both mainly comprising four heating zones. The first electrical component 21 has heating zones 1, 2, 3, and 4, while the second electrical component 22 has heating zones 5, 6, 7, and 8. The third electrical component 23 is heating zone 9, the fourth electrical component 24 is heating zone 10, the fifth electrical component 25 is heating zone 11, and the sixth electrical component is heating zone 12.

[0101] When the electrical box is in operation, the temperatures of heating zones 1 and 2 are higher than those of heating zone 3, and the temperature of heating zone 3 is higher than that of heating zone 4; the temperatures of heating zones 5 and 6 are higher than those of heating zone 7, and the temperature of heating zone 7 is higher than that of heating zone 8; the temperatures of heating zones 1-8 are higher than those of heating zones 9 and 10; and the temperatures of heating zones 9 and 10 are higher than those of heating zones 11 and 12. Therefore, the cooling priority order is as follows: heating zones 1 and 2 before heating zone 3, heating zone 3 before heating zone 4; heating zones 5 and 6 before heating zone 7, heating zone 7 before heating zone 8; heating zones 1-8 before heating zones 9 and 10; and heating zones 9 and 10 before heating zones 11 and 12.

[0102] When the first radiator 4 and the second radiator 5 are operating normally, the airflow inside the electrical box is as follows: Figure 6 As shown, the second heat sink 5 blows air upwards and rotates 5 degrees relative to the lower edge of the second electrical component 22. After rotating 5 degrees, the air outlet of the second heat sink 5 can be better directed at the heat-generating area 5 on the second electrical component 22, and at the same time, it can provide a certain amount of exhaust space behind the second heat sink 5 to ensure the airflow strength of the second heat sink 5. The second heat sink 5 can effectively dissipate heat from almost all the heat-generating components on the second electrical component 22. When its airflow blows upwards, it is blocked by the bus capacitor on the heating zone 8. The blocked airflow then flows in two different directions: approximately 50% of the airflow passes through the right side of the bus capacitor on the heating zone 8, and after passing the bus capacitor, it passes through the sixth electrical component 26, which has higher heat resistance, continuing to flow upwards and to the left. The airflow is then blocked by the choke on the heating zone 10 and blown over the choke from both above and below. The airflow that flows upwards around the choke on the heating zone 10 blows along the wall of the electrical box to the third electrical component 23 to dissipate heat and flows to the rear of the first heat sink 4, providing exhaust airflow for the first heat sink 4. The remaining approximately 50% of the airflow passes through the bus capacitor on the second electrical component 22. The airflow passes through the left and top sides of the line capacitor, and blows upward and leftward over the choke coil of the third electrical component 23 for effective heat dissipation. It then flows to the rear of the first heat sink 4, providing sufficient airflow for it. The first heat sink 4 draws in air and sends it forward, aligning with all the heat-generating components on the first electrical component 21. After passing through the heat-generating areas of the first electrical component 21, the airflow is blocked by the lower boundary of the electrical box. Part of the airflow flows to the left towards the bus capacitor (i.e., heat-generating area 4) of the first electrical component 21, effectively dissipating heat from the bus capacitor. The other part flows through heat-generating areas 2 and 3 for heat dissipation and then to the rear of the second heat sink 5, providing sufficient airflow for it to draw in and deliver air, ensuring the airflow intensity of the second heat sink 5. This creates a circulating airflow, achieving the purpose of dissipating heat from all heat-generating components.

[0103] Through the description of several embodiments of the electrical box of the present invention, it can be seen that the embodiments of the electrical box of the present invention adopt a partition layer design, and at the same time utilize the distribution and priority design of heat sources to reduce the return air temperature, while taking into account the heat dissipation needs of all heat sources. When the ambient temperature is high, a heat sink is used to perform strong convection circulation heat dissipation for the electrical components inside the electrical box; when the ambient temperature is low and the heat sink is closed, natural circulation heat dissipation is used to suppress local heat generation. This increases the critical temperature control of the heat sink, extends the service life of the heat sink, improves the reliability of the electrical box, and meets the temperature rise requirements of all components under all operating conditions. Compared with the solution of setting an evaporator and microchannel heat exchanger, it can control costs.

[0104] Based on the aforementioned electrical box, the present invention also proposes an air conditioning unit that includes the aforementioned electrical box.

[0105] The positive technical effects of the electrical box in the above embodiments are also applicable to air conditioning units, and will not be repeated here.

[0106] In addition to air conditioning units, the electrical box provided in this embodiment of the invention can also be used on other electrical appliances that require an electrical box, which will not be described in detail here.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can still be made to some technical features without departing from the principle of the present invention, and such modifications and equivalent substitutions should all be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An electrical box, characterized in that, include: Box body (1), wherein the box body (1) is provided with a receiving cavity (11); Multiple electrical components (2) are disposed in the receiving cavity (11); and A partition (3) is disposed in the receiving cavity (11). The partition (3) is configured to divide the receiving cavity (11) into a first cavity (12) and a second cavity (13). When the electrical box is in working state, the temperature in the first cavity (12) is different from the temperature in the second cavity (13). A first connecting part (14) connecting the first cavity (12) and the second cavity (13) is provided near the top wall of the receiving cavity (11). A second connecting part (15) connecting the first cavity (12) and the second cavity (13) is provided near the bottom wall of the receiving cavity (11). The gas in the first cavity (12) and the gas in the second cavity (13) achieve natural circulation flow through the first connecting part (14) and the second connecting part (15) to exchange heat. The plurality of electrical devices (2) include a first electrical device (21) and a second electrical device (22) disposed in the first cavity (12). The first electrical device (21) and the second electrical device (22) are disposed side by side near the bottom wall of the receiving cavity (11), and the distance between the second electrical device (22) and the bottom wall of the receiving cavity (11) is greater than the distance between the first electrical device (21) and the bottom wall of the receiving cavity (11). The first electrical device (21) and the second electrical device (22) have the same structure, and the arrangement directions of the first electrical device (21) and the second electrical device (22) are 180° apart, so that the high temperature region of the first electrical device (21) and the low temperature region of the second electrical device (22) are arranged adjacent to each other.

2. The electrical box according to claim 1, characterized in that, The top (31) of the partition (3) has a first gap with the top wall of the receiving cavity (11), the first gap forming the first connecting portion (14); and / or, the bottom (32) of the partition (3) has a second gap with the bottom wall of the receiving cavity (11), the second gap forming the second connecting portion (15).

3. The electrical box according to claim 1, characterized in that, The partition (3) is connected to the top wall of the receiving cavity (11), and the partition (3) is provided with a first through hole near the top wall of the receiving cavity (11), the first through hole forming the first connecting part (14); and / or, the partition (3) is connected to the bottom wall of the receiving cavity (11), and the partition (3) is provided with a second through hole near the bottom wall of the receiving cavity (11), the second through hole forming the second connecting part (15).

4. The electrical box according to claim 1, characterized in that, The temperature inside the first cavity (12) is greater than the temperature inside the second cavity (13), and all of the electrical devices (2) are disposed inside the first cavity (12); or, the total heat generation of the electrical devices (2) disposed inside the first cavity (12) is greater than the total heat generation of the electrical devices (2) disposed inside the second cavity (13).

5. The electrical box according to claim 1, characterized in that, The plurality of electrical devices (2) include a third electrical device (23) and a fourth electrical device (24) disposed in the first cavity (12). The heat generation of the first electrical device (21) and the heat generation of the second electrical device (22) are both greater than the heat generation of the third electrical device (23), and the heat generation of the first electrical device (21) and the heat generation of the second electrical device (22) are both greater than the heat generation of the fourth electrical device (24). The third electrical device (23) and the fourth electrical device (24) are disposed side by side near the top wall of the receiving cavity (11).

6. The electrical box according to claim 5, characterized in that, The bottom (32) of the partition (3) is substantially opposite to the centerline of the high-temperature zone of the first electrical device (21) near the bottom wall of the receiving cavity (11), and the top (31) of the partition (3) is substantially opposite to the edge of the top wall of the third electrical device (23) and the fourth electrical device (24) away from the receiving cavity (11).

7. The electrical box according to claim 5, characterized in that, It also includes a first heat sink (4) and a second heat sink (5) disposed in the receiving cavity (11), the first electrical component (21) and the third electrical component (23) are arranged opposite to each other, the second electrical component (22) and the fourth electrical component (24) are arranged opposite to each other, the first heat sink (4) is disposed between the first electrical component (21) and the third electrical component (23), and the second heat sink (5) is disposed between the second electrical component (22) and the bottom wall of the receiving cavity (11).

8. The electrical box according to claim 7, characterized in that, The first heat sink (4) and the second heat sink (5) are configured such that the airflow blown out by the first heat sink (4) flows to the first electrical device (21) and reaches the return air inlet of the second heat sink (5), and the airflow blown out by the second heat sink (5) flows to the second electrical device (22), then flows through the fourth electrical device (24) and the third electrical device (23) and reaches the return air inlet of the first heat sink (4).

9. The electrical box according to claim 7, characterized in that, The air outlet of the first heat sink (4) is arranged at an angle relative to the edge of the first electrical component (21) so that the air outlet of the first heat sink (4) faces the second heat sink (5).

10. The electrical box according to claim 7, characterized in that, The angle between the plane where the air outlet of the first heat sink (4) is located and the edge line of the first electrical device (21) near the third electrical device (23) is 35°~45°.

11. The electrical box according to claim 7, characterized in that, There is a preset gap between the second heat sink (5) and the bottom wall of the receiving cavity (11), and the side of the second heat sink (5) away from the first heat sink (4) is inclined toward the bottom wall of the receiving cavity (11) so that the outlet of the second heat sink (5) is toward the area between the second electrical device (22) and the fourth electrical device (24) and the side wall of the receiving cavity (11).

12. The electrical box according to claim 7, characterized in that, The angle between the plane where the air outlet of the second heat sink (5) is located and the edge line of the bottom wall of the second electrical device (22) near the cavity (11) is 5°~10°.

13. The electrical box according to claim 7, characterized in that, The first electrical component (21), the second electrical component (22), the third electrical component (23) and the fourth electrical component (24) are all disposed in the first cavity (12). In the direction perpendicular to the partition (3), the distance between the wall of the first cavity (12) opposite to the partition (3) and the partition (3), the height of the first heat sink (4) and the height of the second heat sink (5) are basically equal.

14. The electrical box according to claim 7, characterized in that, The partition (3) is provided with a third through hole (33), and the top surface of the first radiator (4) is exposed through the third through hole (33).

15. The electrical box according to claim 7, characterized in that, It also includes a control device connected to the first radiator (4), the first radiator (4) having a first on-temperature and a first off-temperature, the control device being configured to control the first radiator (4) to turn on when the ambient temperature is greater than or equal to the first on-temperature and to control the first radiator (4) to turn off when the ambient temperature is less than or equal to the first off-temperature, wherein the first on-temperature is greater than the first off-temperature; and / or, the control device being connected to the second radiator (5), the second radiator (5) having a second on-temperature and a second off-temperature, the control device being configured to control the second radiator (5) to turn on when the ambient temperature is greater than or equal to the second on-temperature and to control the second radiator (5) to turn off when the ambient temperature is less than or equal to the second off-temperature, wherein the second on-temperature is greater than the second off-temperature.

16. The electrical box according to claim 15, characterized in that, The first opening temperature is 2°C to 5°C higher than the first closing temperature; and / or, the second opening temperature is 2°C to 5°C higher than the second closing temperature.

17. An air conditioning unit, characterized in that, Includes the electrical box as described in any one of claims 1 to 16.

Images