Electrical box and air conditioning unit

Abstract

The present disclosure relates to an electrical box and an air conditioning unit. The electrical box comprises a box body (1), a plurality of electrical devices (2), and a partition plate (3). An accommodating cavity (11) is formed in the box body (1), and the plurality of electrical devices (2) are provided in the accommodating cavity (11); the partition plate (3) is provided in the accommodating cavity (11), and the partition plate (3) is configured to divide the accommodating cavity (11) into a first cavity (12) and a second cavity (13); when the electrical box is in a working state, the temperature in the first cavity (12) is different from the temperature in the second cavity (13); a first communication portion (14) in communication with the first cavity (12) and the second cavity (13) is provided at the position in the accommodating cavity (11) close to the top wall of the accommodating cavity (11); a second communication portion (15) in communication with the first cavity (12) and the second cavity (13) is provided at the position in the accommodating cavity (11) close to the bottom wall of the accommodating cavity (11); and gas in the first cavity and gas in the second cavity circularly flow by means of the first communication portion and the second communication portion for heat exchange.

Description

Electrical boxes and air conditioning units

[0001] This disclosure is based on and claims priority to an application filed in China with application number 202311782333.X, filed on December 22, 2023. The disclosure of this application is hereby incorporated into this disclosure as a whole. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an electrical appliance box and an air conditioning unit. Background Art

[0003] The air conditioner electrical box contains various devices that generate heat during normal operation, such as PCB boards, frequency conversion modules, power transformers, and various scattered switching devices and voltage stabilizing devices.

[0004] To ensure high protection performance of the electrical box, such as waterproof and dustproof, and to ensure the normal operation of electrical components, the structure of the electrical box needs to be sealed. However, at the same time, since there is no external heat dissipation, the temperature of the components will rise, causing damage to the components.

[0005] Therefore, how to ensure that the temperature rise of the electronic components in the electrical box does not exceed the preset standard under the condition that the electrical box is closed (no external ventilation holes are opened) is a difficult problem.

[0006] It should be noted that the information disclosed in the background section of this disclosure is intended solely to enhance understanding of the overall background of this disclosure and should not be construed as an admission or any form of implication that such information constitutes prior art already known to those skilled in the art. The foregoing statements are intended solely to provide background information related to this disclosure and do not necessarily constitute prior art.

[0007] Summary of the Invention

[0008] The embodiments of the present disclosure provide an electrical appliance box and an air conditioning unit, which can effectively reduce the local temperature of the electrical appliance box.

[0009] According to a first aspect of the present disclosure, there is provided an electrical appliance box, comprising:

[0010] A box body, wherein a receiving cavity is provided in the box body;

[0011] A plurality of electrical components are disposed in the receiving cavity; and

[0012] A partition is arranged in the accommodating chamber, and the partition is configured to separate the accommodating chamber into a first chamber and a second chamber. When the electrical box is in a working state, the temperature in the first chamber is different from the temperature in the second chamber. A first connecting portion connecting the first chamber and the second chamber is provided at a position near the top wall of the accommodating chamber in the accommodating chamber, and a second connecting portion connecting the first chamber and the second chamber is provided at a position near the bottom wall of the accommodating chamber in the accommodating chamber. The gas in the first chamber and the gas in the second chamber circulate through the first connecting portion and the second connecting portion to perform heat exchange.

[0013] In some embodiments, there is a first gap between the top of the partition and the top wall of the accommodating cavity, and the first gap forms a first connecting portion; and / or, there is a second gap between the bottom of the partition and the bottom wall of the accommodating cavity, and the second gap forms a second connecting portion.

[0014] In some embodiments, the partition is connected to the top wall of the accommodating chamber, and a first through hole is provided on the partition near the top wall of the accommodating chamber, and the first through hole forms a first connecting portion; and / or, the partition is connected to the bottom wall of the accommodating chamber, and a second through hole is provided on the partition near the bottom wall of the accommodating chamber, and the second through hole forms a second connecting portion.

[0015] In some embodiments, the temperature in the first cavity is greater than the temperature in the second cavity, and multiple electrical devices are disposed in the first cavity; or, the total heat generated by the electrical devices disposed in the first cavity is greater than the total heat generated by the electrical devices disposed in the second cavity.

[0016] In some embodiments, multiple electrical devices include a first electrical device, a second electrical device, a third electrical device, and a fourth electrical device arranged in a first cavity, the heat generation of the first electrical device and the heat generation of 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 heat generation of 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 arranged side by side near the bottom wall of the accommodating cavity, and the distance between the second electrical device and the bottom wall of the accommodating cavity is greater than the distance between the first electrical device and the bottom wall of the accommodating cavity, and the third electrical device and the fourth electrical device are arranged side by side near the top wall of the accommodating cavity.

[0017] 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 differ by 180°, so that the high temperature zone of the first electrical device and the low temperature zone of the second electrical device are arranged adjacent to each other, and the low temperature zone of the first electrical device and the high temperature zone of the second electrical device are arranged adjacent to each other.

[0018] In some embodiments, the bottom of the partition is basically opposite to the center line of the high temperature zone of the first electrical device close to the bottom wall of the accommodating cavity, and the top of the partition is basically opposite to the edge of the top wall of the third electrical device and the fourth electrical device away from the accommodating cavity.

[0019] In some embodiments, the electrical box also includes a first radiator and a second radiator arranged in the accommodating 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 radiator is arranged between the first electrical component and the third electrical component, and the second radiator is arranged between the second electrical component and the bottom wall of the accommodating cavity.

[0020] In some embodiments, the first radiator and the second radiator are constructed so that the air flow blown out of the first radiator flows toward the first electrical device and reaches the return air outlet of the second radiator, and the air flow blown out of the second radiator flows toward the second electrical device, then flows through the fourth electrical device and the third electrical device and reaches the return air outlet of the first radiator.

[0021] In some embodiments, the air outlet of the first heat sink is arranged obliquely relative to an edge of the first electrical component, so that the air outlet of the first heat sink faces the second heat sink.

[0022] 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 close to the third electrical component is 35° to 45°.

[0023] In some embodiments, there is a preset gap between the second heat sink and the bottom wall of the accommodating cavity, and the side of the second heat sink away from the first heat sink is inclined toward the bottom wall of the accommodating cavity, so that the outlet of the second heat sink is directed toward the second electrical device and the area between the fourth electrical device and the side wall of the accommodating cavity.

[0024] 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 second electrical component close to the bottom wall of the accommodating cavity is 5° to 10°.

[0025] In some embodiments, the first electrical device, the second electrical device, the third electrical device and the fourth electrical device are all arranged in the first cavity, and in the direction perpendicular to the partition, the distance between the wall of the first cavity opposite to the partition and the partition, the height of the first radiator and the height of the second radiator are basically equal.

[0026] In some embodiments, a third through hole is provided on the partition, and the top surface of the first heat sink is exposed through the third through hole.

[0027] In some embodiments, the electrical box also includes a control device, which is connected to the first radiator signal, the first radiator has a first turn-on temperature and a first turn-off temperature, and the control device is configured to control the first radiator to turn on when the ambient temperature is greater than or equal to the first turn-on temperature, and to control the first radiator to turn off when the ambient temperature is less than or equal to the first turn-off temperature, wherein the first turn-on temperature is greater than the first turn-off temperature; and / or, the control device is connected to the second radiator signal, the second radiator has a second turn-on temperature and a second turn-off temperature, and the control device is configured to control the second radiator to turn on when the ambient temperature is greater than or equal to the second turn-on temperature, and to control the second radiator to turn off when the ambient temperature is less than or equal to the second turn-off temperature, wherein the second turn-on temperature is greater than the second turn-off temperature.

[0028] In some embodiments, the first opening temperature is 2° C. to 5° C. greater than the first closing temperature; and / or the second opening temperature is 2° C. to 5° C. greater than the second closing temperature.

[0029] According to a second aspect of the present disclosure, an air conditioning unit is provided, comprising the above-mentioned electrical appliance box.

[0030] Based on the above technical solution, the embodiment of the present disclosure can separate the accommodating chamber into a first chamber and a second chamber by setting a partition, and by setting a first connecting part and a second connecting part, the air flow can circulate in the first chamber and the second chamber, so that the high temperature zone and the low temperature zone can exchange heat, thereby avoiding the local temperature inside the box body from being too high and achieving the effect of balancing the temperature inside the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0032] FIG1 is a schematic diagram of the internal structure of some embodiments of the electrical appliance box provided by the present disclosure.

[0033] FIG2 is a schematic diagram of the arrangement structure of partitions in some embodiments of the electrical appliance box provided by the present disclosure.

[0034] FIG3 is a side view of the internal structure of some embodiments of the electrical box provided by the present disclosure.

[0035] FIG4 is a schematic diagram of airflow circulating in a first cavity and a second cavity in some embodiments of the electrical box provided by the present disclosure.

[0036] FIG5 is a schematic diagram of heating areas of various electrical components in some embodiments of the electrical appliance box provided by the present disclosure.

[0037] FIG6 is a schematic diagram of gas flow in the first cavity of some embodiments of the electrical box provided by the present disclosure.

[0038] FIG7 is a schematic structural diagram of a partition in some embodiments of the electrical appliance box provided by the present disclosure.

[0039] In the picture:

[0040] 1. Box body; 11. Accommodating cavity; 12. First cavity; 13. Second cavity; 14. First connecting part; 15. Second connecting part; 2. Electrical component; 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 radiator; 5. Second radiator. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0042] In the description of the present disclosure, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present disclosure.

[0043] With reference to Figures 1, 2 and 3, in some embodiments of the electrical box provided in the present disclosure, the electrical box includes a box body 1, multiple electrical components 2 and a partition 3. A accommodating chamber 11 is provided in the box body 1, multiple electrical components 2 are arranged in the accommodating chamber 11, and the partition 3 is arranged in the accommodating chamber 11. The partition 3 is configured to separate the accommodating chamber 11 into a first chamber 12 and a second chamber 13. When the electrical box is in a working state, the temperature in the first chamber 12 is different from the temperature in the second chamber 13. A first connecting portion 14 connecting the first chamber 12 and the second chamber 13 is provided at a position near the top wall of the accommodating chamber 11 in the accommodating chamber 11, and a second connecting portion 15 connecting the first chamber 12 and the second chamber 13 is provided at a position near the bottom wall of the accommodating chamber 11 in the accommodating chamber 11. The gas in the first chamber 12 and the gas in the second chamber 13 circulate through the first connecting portion 14 and the second connecting portion 15 for heat exchange.

[0044] In the embodiment provided in the present disclosure, by providing a partition 3, the accommodating chamber 11 can be divided into a first chamber 12 and a second chamber 13, and by providing a first connecting portion 14 and a second connecting portion 15, the air flow can be circulated in the first chamber 12 and the second chamber 13, so that the high-temperature zone and the low-temperature zone can exchange heat, thereby avoiding the local temperature inside the box body 1 from being too high and achieving the effect of balancing the temperature inside the box body 1.

[0045] Specifically, as shown in Figure 4, the first connecting portion 14 is arranged in the accommodating chamber 11 at a position close to the top wall of the accommodating chamber 11, and the second connecting portion 15 is arranged in the accommodating chamber 11 at a position close to the bottom wall of the accommodating chamber 11. Therefore, when the temperature in the first chamber 12 is greater than the temperature in the second chamber 13, the hot air flow in the first chamber 12 rises and enters the second chamber 13 through the first connecting portion 14, and exchanges heat with the cold air flow in the second chamber 13. After the heat exchange is completed, the cooling air flow sinks and then returns to the first chamber 12 through the second connecting portion 15, which can cool the high temperature area in the first chamber 12, thereby achieving the effect of reducing the local high temperature in the first chamber 12. Then, the air flow continues to rise after being heated, and circulates in the first chamber 12 and the second chamber 13, thereby achieving the effect of using the low-temperature air flow in the second chamber 13 to cool the high temperature area in the first chamber 12.

[0046] 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 portion 14, and 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 portion 15, which can cool the high-temperature area in the second cavity 13, thereby reducing the local high temperature in the second cavity 13. Then, after being heated, the airflow continues to rise and circulates in the first cavity 12 and the second cavity 13, thereby achieving the effect of using the low-temperature airflow in the first cavity 12 to cool the high-temperature area in the second cavity 13.

[0047] The embodiment of the present disclosure uses the first connecting portion 14 and the second connecting portion 15 to allow the airflow to form a natural circulation flow between the first cavity 12 and the second cavity 13, without relying on the drive of airflow driving components such as fans, thereby reducing energy consumption and achieving the purpose of energy saving and environmental protection.

[0048] In the embodiment of the present disclosure, the temperature in the first cavity 12 and the temperature in the second cavity 13 can be measured using a thermometer when the electrical box is in working state, and the temperature in the first cavity 12 and the temperature in the second cavity 13 can be measured again after the electrical box has been working for a period of time and has basically stabilized.

[0049] The temperature in the first chamber 12 and the temperature in the second chamber 13 can be a real-time temperature or an average temperature over a period of time. In addition, when the temperature distribution in the first chamber 12 and the second chamber 13 is uneven, the temperature in the first chamber 12 and the temperature in the second chamber 13 can be the average temperature of multiple different locations in the corresponding chambers. Of course, the embodiment of using local temperature as the temperature in the first chamber 12 and the temperature in the second chamber 13 is not excluded. In general, the difference in temperature in the first chamber 12 and the temperature in the second chamber 13 is the driving force for the airflow in the first chamber 12 and the airflow in the second chamber 13 to form a circulating flow. This driving force can also be the pressure or other driving force that causes the airflow to flow between the first chamber 12 and the second chamber 13.

[0050] In some embodiments, there is a first gap between the top 31 of the partition 3 and the top wall of the accommodating cavity 11, and the first gap forms a first connecting portion 14; and / or, there is a second gap between the bottom 32 of the partition 3 and the bottom wall of the accommodating cavity 11, and the second gap forms a second connecting portion 15.

[0051] By providing the first gap and the second gap, a first communicating portion 14 and a second communicating portion 15 can be formed, thereby achieving a circulating flow of air in the first cavity 12 and the second cavity 13 .

[0052] In this embodiment, the top 31 and the bottom 32 of the partition 3 are not directly connected to the wall of the accommodating chamber 11, and the two sides of the partition 3 are respectively connected to the side walls of the accommodating chamber 11; alternatively, the partition 3 can be connected to the front and rear side walls of the accommodating chamber 11 through a supporting structure.

[0053] In some embodiments, the partition 3 is connected to the top wall of the accommodating chamber 11, and a first through hole is provided at a position of the partition 3 near the top wall of the accommodating chamber 11, and the first through hole forms a first connecting portion 14; and / or, the partition 3 is connected to the bottom wall of the accommodating chamber 11, and a second through hole is provided at a position of the partition 3 near the bottom wall of the accommodating chamber 11, and the second through hole forms a second connecting portion 15.

[0054] By providing the first through hole and the second through hole on the partition 3 , the first communicating portion 14 and the second communicating portion 15 can be formed, and the connection between the partition 3 and the box body 1 can be facilitated.

[0055] There are many options for separating the first cavity 12 and the second cavity 13 , and the distribution of the plurality of electrical devices 2 in the first cavity 12 and the second cavity 13 can be relatively flexible and can be determined according to actual needs.

[0056] For example, in some embodiments, the temperature in the first cavity 12 is greater than the temperature in the second cavity 13 , and the plurality of electrical devices 2 are disposed in the first cavity 12 .

[0057] In other embodiments, electrical devices 2 are provided in both the first cavity 12 and the second cavity 13, wherein the total heat generation of the electrical devices 2 provided in the first cavity 12 is greater than the total heat generation of the electrical devices 2 provided in the second cavity 13, or the total heat generation of the electrical devices 2 provided in the second cavity 13 is greater than the total heat generation of the electrical devices 2 provided in the first cavity 12.

[0058] In some embodiments, multiple 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 arranged 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 first electrical device 21 and the second electrical device 22 are arranged side by side near the bottom wall of the accommodating cavity 11, and the distance between the second electrical device 22 and the bottom wall of the accommodating cavity 11 is greater than the distance between the first electrical device 21 and the bottom wall of the accommodating cavity 11, and the third electrical device 23 and the fourth electrical device 24 are arranged side by side near the top wall of the accommodating cavity 11.

[0059] 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 differ by 180°.

[0060] As shown in Figures 1 and 2, the structures of the first electrical device 21 and the second electrical device 22 are exactly the same, but their arrangement orientations in the first cavity 12 are different. The arrangement directions of the first electrical device 21 and the second electrical device 22 differ by 180°, that is, after the first electrical device 21 rotates 180° around its own center, the arrangement direction is exactly the same as that of the second electrical device 22.

[0061] As shown in FIG5 , the first electrical device 21 includes a heating zone 1, a heating zone 2, a heating zone 3, and a heating zone 4. The structure of the second electrical device 22 is the same as that of the first electrical device 21, including a heating zone 5 corresponding to the heating zone 1, a heating zone 6 corresponding to the heating zone 2, a heating zone 7 corresponding to the heating zone 3, and a heating zone 8 corresponding to the heating zone 4. During arrangement, the heating zone 4 of the first electrical device 21 is arranged at a position close to the bottom wall of the accommodating cavity 11, and the heating zones 1 and 2 are arranged at positions away from the bottom wall of the accommodating cavity 11; while the heating zone 8 of the second electrical device 22 corresponding to the heating zone 4 of the first electrical device 21 is arranged at a position away from the bottom wall of the accommodating cavity 11, and the heating zone 5 of the second electrical device 22 corresponding to the heating zone 1 of the first electrical device 21 and the heating zone 6 corresponding to the heating zone 2 of the first electrical device 21 are arranged at a position close to the bottom wall of the accommodating cavity 11.

[0062] By setting the arrangement directions of the first electrical device 21 and the second electrical device 22 to be 180° apart, it is possible to avoid the high temperature zone of the first electrical device 21 being too close to the high temperature zone of the second electrical device 22, so that the high temperature zone of the first electrical device 21 and the low temperature zone of the second electrical device 22 are arranged adjacent to each other, and the low temperature zone of the first electrical device 21 and the high temperature zone of the second electrical device 22 are arranged adjacent to each other, thereby achieving the purpose of temperature balance and preventing local temperature from being too high.

[0063] In some embodiments, the bottom 32 of the partition 3 is basically opposite to the center line of the high temperature zone of the first electrical device 21 close to the bottom wall of the accommodating cavity 11, and the top 31 of the partition 3 is basically opposite to the edge of the top wall away from the accommodating cavity 11 of the third electrical device 23 and the fourth electrical device 24.

[0064] Since the heat generated by the first electrical device 21 and the heat generated by the second electrical device 22 are both greater than the heat generated by the third electrical device 23, and the heat generated by the first electrical device 21 and the heat generated by the second electrical device 22 are both greater than the heat generated by the fourth electrical device 24, the above arrangement of the partition 3 can at least separate the first electrical device 21 and the second electrical device 22 with larger heat generation into the same chamber, which is convenient for separating the accommodating chamber 11 into a high-temperature zone and a low-temperature zone, thereby facilitating the heat exchange of the subsequent airflow in the circulation flow. At the same time, the above arrangement of the partition 3 is also conducive to the formation of a circulation flow of the airflow as shown in Figure 6. Combined with the setting position of the first radiator 4 and the second radiator 5 described below, the arrangement of the partition 3 can make the cooling airflow flowing out of the air outlet of the first radiator 4 and the second radiator 5 more concentrated to flow to the target heat dissipation zone, avoiding the dispersion of the airflow and reducing the cooling effect.

[0065] In some embodiments, the electrical box also includes a first radiator 4 and a second radiator 5 arranged in the accommodating 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 radiator 4 is arranged between the first electrical component 21 and the third electrical component 23, and the second radiator 5 is arranged between the second electrical component 22 and the bottom wall of the accommodating cavity 11.

[0066] By providing the first radiator 4 and the second radiator 5 , the accommodating cavity 11 can be actively cooled, thereby reducing the overall temperature in the accommodating cavity 11 and effectively protecting the electrical device 2 .

[0067] As shown in Figure 6, in some embodiments, the first radiator 4 and the second radiator 5 are constructed so that the air flow blown out by the first radiator 4 flows toward the first electrical device 21 and reaches the return air outlet of the second radiator 5, and the air flow blown out by the second radiator 5 flows toward the second electrical device 22, then flows through the fourth electrical device 24 and the third electrical device 23 and reaches the return air outlet of the first radiator 4.

[0068] By constructing the first radiator 4 so that the airflow blown out by the first radiator 4 flows toward the first electrical device 21 and reaches the return air outlet of the second radiator 5, the first electrical device 21 can be centrally cooled by the first radiator 4, and the cooled airflow can reach the return air outlet of the second radiator 5 and be sucked away by the return air outlet of the second radiator 5, thereby achieving the purpose of air circulation.

[0069] By constructing the second radiator 5 so that the airflow blown out by the second radiator 5 flows to the second electrical component 22, then flows through the fourth electrical component 24 and the third electrical component 23 and reaches the return air outlet of the first radiator 4, the second electrical component 22 can be centrally cooled by the second radiator 5, and the cooled airflow can continue to cool the fourth electrical component 24 and the third electrical component 23, and finally reach the return air outlet of the first radiator 4, and be sucked away by the return air outlet of the first radiator 4, thereby achieving the purpose of air circulation.

[0070] In some embodiments, the air outlet of the first heat sink 4 is arranged obliquely relative to the edge of the first electrical device 21 , so that the air outlet of the first heat sink 4 faces the second heat sink 5 .

[0071] By setting the air outlet of the first radiator 4 to be inclined relative to the edge of the first electrical device 21, the air outlet of the first radiator 4 can be directed toward the second radiator 5, so that the airflow blown out by the first radiator 4 can be sucked into the return air outlet of the second radiator 5 after cooling the first electrical device 21, so as to realize the circulation of the airflow and avoid the airflow being unable to circulate forward due to the dissipation of energy.

[0072] In some embodiments, the angle between the plane where the air outlet of the first radiator 4 is located and the edge line of the first electrical component 21 close to the third electrical component 23 is 35° to 45°, such as 35°, 40° or 45°.

[0073] Setting the angle between the plane where the air outlet of the first radiator 4 is located and the edge line of the first electrical device 21 close to the third electrical device 23 within the range of 35° to 45° can ensure that most of the airflow at the outlet of the first radiator 4 can flow in the direction of the first electrical device 21 and the second radiator 5.

[0074] In some embodiments, there is a preset gap between the second heat sink 5 and the bottom wall of the accommodating 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 accommodating cavity 11, so that the outlet of the second heat sink 5 is directed toward the area between the second electrical device 22 and the fourth electrical device 24 and the side wall of the accommodating cavity 11.

[0075] By setting the side of the second radiator 5 away from the first radiator 4 to be inclined toward the bottom wall of the accommodating cavity 11, the outlet of the second radiator 5 can be directed toward the second electrical component 22 and the area between the fourth electrical component 24 and the side wall of the accommodating cavity 11, so that the airflow blown out by the second radiator 5 can cool the second electrical component 22, and at the same time continue to flow forward to cool the area between the fourth electrical component 24 and the side wall of the accommodating cavity 11, and finally flow through the fourth electrical component 24 and the third electrical component 23 to reach the return air outlet of the first radiator 4.

[0076] 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 second electrical device 22 close to the bottom wall of the accommodating cavity 11 is 5° to 10°, such as 5°, 7°, 8° or 10°.

[0077] The angle between the plane where the air outlet of the second radiator 5 is located and the edge line of the second electrical component 22 close to the bottom wall of the accommodating cavity 11 is set within the range of 5° to 10°, so that most of the airflow blown out from the second radiator 5 flows to the area between the second electrical component 22 and the fourth electrical component 24 and the side wall of the accommodating cavity 11, and the distance between the second radiator 5 and the bottom wall of the accommodating cavity 11 is avoided to be too small, which affects the circulation of airflow.

[0078] In some embodiments, the first electrical device 21, the second electrical device 22, the third electrical device 23 and the fourth electrical device 24 are all arranged 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 radiator 4 and the height of the second radiator 5 are basically equal.

[0079] By setting the position of the partition 3 so that the distance between the wall of the first cavity 12 opposite to the partition 3 and the partition 3 is basically equal to the height of the first radiator 4 and the height of the second radiator 5, the air outlet area of ​​the first radiator 4 and the second radiator 5 can be maximized, avoiding the reduction of the air outlet area of ​​the first radiator 4 and the second radiator 5 due to the distance between the wall of the first cavity 12 opposite to the partition 3 and the partition 3 being too small; it can also avoid the formation of a gap between the partition 3 and the top of the first radiator 4, which affects the circulation path of the airflow in the first cavity 12.

[0080] As shown in FIG. 7 , in some embodiments, a third through hole 33 is provided on the partition plate 3 , and the top surface of the first heat sink 4 is exposed from the third through hole 33 .

[0081] By providing the third through hole 33 , interference between the partition plate 3 and the first radiator 4 can be effectively avoided, thereby facilitating the installation of the partition plate 3 .

[0082] In some embodiments, the electrical box also includes a control device, which is signal-connected to the first radiator 4, and the first radiator 4 has a first turn-on temperature and a first turn-off temperature. The control device is configured to control the first radiator 4 to turn on when the ambient temperature is greater than or equal to the first turn-on temperature, and to control the first radiator 4 to turn off when the ambient temperature is less than or equal to the first turn-off temperature, wherein the first turn-on temperature is greater than the first turn-off temperature; and / or, the control device is signal-connected to the second radiator 5, and the second radiator 5 has a second turn-on temperature and a second turn-off temperature. The control device is configured to control the second radiator 5 to turn on when the ambient temperature is greater than or equal to the second turn-on temperature, and to control the second radiator 5 to turn off when the ambient temperature is less than or equal to the second turn-off temperature, wherein the second turn-on temperature is greater than the second turn-off temperature.

[0083] By setting the first opening temperature to be greater than the first closing temperature, and setting the second opening temperature to be greater than the second closing temperature, frequent opening and closing of the first radiator 4 and the second radiator 5 can be avoided, which is beneficial to improving the service life of the first radiator 4 and the second radiator 5.

[0084] In some embodiments, the first opening temperature is 2° C. to 5° C. greater than the first closing temperature; and / or the second opening temperature is 2° C. to 5° C. greater than the second closing temperature.

[0085] Setting the temperature difference between the first opening temperature and the first closing temperature within the range of 2°C to 5°C, and setting the temperature difference between the second opening temperature and the second closing temperature within the range of 2°C to 5°C, can not only avoid the first radiator 4 and the second radiator 5 from being frequently opened and closed, but also avoid the first radiator 4 and the second radiator 5 from being unable to be opened or closed in time, affecting the control effect of the temperature inside the box body 1.

[0086] The first radiator 4 and the second radiator 5 can be fans or blowers.

[0087] The structure and cooling principle of an embodiment of the electrical box provided by the present disclosure are described below with reference to Figures 1 to 7:

[0088] As shown in FIG1 , the electrical box includes a box body 1 having an interior with a receiving cavity 11. The receiving cavity 11 contains a plurality of electrical components 2. The plurality of 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.

[0089] In this embodiment, the first and second electrical components 21, 22 are identical circuit boards. The third and fourth electrical components 23, 24 are also circuit boards, but their structures differ from those of the first and second electrical components 21, 22. The heat source on the circuit boards is primarily a common-mode choke. The fifth and sixth electrical components 25, 26 are both reactors. The first, second, third, and fourth electrical components 21, 22, 23, and 24 all have a square, block-shaped structure.

[0090] The first and second electrical components 21, 22 are arranged parallel to each other near the bottom wall of the accommodating cavity 11. Both components are arranged parallel to the partition 3. The electrical connectors on the first and second components 21, 22 are mounted on the side of the circuit board near the partition 3. The third and fourth electrical components 23, 24 are arranged parallel to each other near the top wall of the accommodating cavity 11. Both components are arranged parallel to the partition 3. The electrical connectors on the third and fourth components 23, 24 are mounted on the side of the circuit board near the partition 3. The fifth and sixth electrical components 25, 26 are positioned on either side of the third and fourth electrical components 23, 24, respectively. The third and fourth electrical components 23, 24 are located between the fifth and sixth electrical components 25, 26. The first and third electrical components 21, 23 are substantially opposite each other, while the second electrical component 22 is positioned opposite the fourth and sixth electrical components 24, 26. A vacant area is provided on the side of the first electrical component 21 facing away from the second electrical component 22.

[0091] The upper edges and lower edges of the third electrical component 23 and the fourth electrical component 24 are flush with each other, and are parallel to the top wall of the accommodating cavity 11 .

[0092] The first electrical component 21 and the second electrical component 22 are arranged vertically offset, with the distance between the first electrical component 21 and the bottom wall of the accommodating cavity 11 being smaller than the distance between the second electrical component 22 and the bottom wall of the accommodating cavity 11. Furthermore, the arrangement directions of the first electrical component 21 and the second electrical component 22 differ by 180°. After rotating the first electrical component 21 180°, the arrangement state of the first electrical component 21 and the second electrical component 22 is identical. Both the upper and lower edges of the first and second electrical components 21, 22 are parallel to the bottom wall of the accommodating cavity 11.

[0093] 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 accommodating cavity 11 .

[0094] One end of the first radiator 4 contacts the upper edge of the first electrical component 21, and the other end is inclined in the direction close to the third electrical component 23. The air outlet of the first radiator 4 is generally oriented towards the second radiator 5, but cannot be directly opposite the second radiator 5. The angle between the plane where the air outlet of the first radiator 4 is located and the upper edge of the first electrical component 21 is 40°. This position makes it easier for the first radiator 4 to dissipate heat to the key components on the first electrical component 21 first. At the same time, the exhaust airflow behind the first radiator 4 can also take into account the third electrical component 23 and the fifth electrical component 25. One end of the second radiator 5 contacts the lower edge of the second electrical component 22, and the other end is inclined in the direction close to the bottom wall of the accommodating cavity 11. The angle between the plane where the air outlet of the second radiator 5 is located and the lower edge of the second electrical component 22 is 5° to 10°. The air outlet surface of the second radiator 5 faces the busbar capacitor of the second electrical component 22 (i.e., the heating zone 5 as shown in Figure 5), and can take into account the sixth electrical component 26, the fourth electrical component 24 and the third electrical component 23.

[0095] As shown in Figure 2, the top 31 of the partition 3 extends upward and just exceeds the lower edges of the third electrical component 23 and the fourth electrical component 24. The bottom 32 of the partition 3 is basically flush with the center line of the common mode choke coil of the heating area arranged on the bottom wall of the accommodating cavity 11 on the first electrical component 21, leaving sufficient space for the airflow circulation in the first cavity 12 and the second cavity 13.

[0096] As shown in FIG3 , the electrical box is placed vertically, and the partition 3 divides the accommodating chamber 11 into a first chamber 12 on the right and a second chamber 13 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.

[0097] The first electrical device 21, the second electrical device 22, the third electrical device 23, the fourth electrical device 24, the fifth electrical device 25, the sixth electrical device 26, the first heat sink 4 and the second heat sink 5 are all arranged in the first cavity 12, and a small number of electrical control components that generate very little heat can be arranged in the second cavity 13.

[0098] A first mounting plate (e.g., sheet metal) is provided within the housing 1 for supporting the first and second electrical components 21, 22. The second heat sink 5 can be mounted on the first mounting plate. A second mounting plate is also provided within the housing 1 for supporting the third, fourth, fifth, and sixth electrical components 23, 24, 25, and 26. The first and second mounting plates can be located at different distances from the wall of the housing cavity 11.

[0099] The first radiator 4 and the second radiator 5 each have an on-temperature and off-temperature setting. When the ambient temperature measured by the temperature sensor is higher than the on-temperature setting, the radiator is turned on; when the ambient temperature measured by the temperature sensor is lower than the off-temperature setting, the radiator is turned off. Setting the on-temperature setting 2-5°C higher than the off-temperature setting prevents the radiator from turning on and off frequently.

[0100] As shown in Figure 4, when the first radiator 4 and the second radiator 5 are both shut down and not in operation, the airflow path in the electrical box is as follows: due to the rising characteristics of hot air flow, the heat flow generated by each heat source in the first cavity 12 rises, then passes over the partition along the first connecting portion 14 on the upper side of the partition 3, and cools in the second cavity 13. After cooling, the cold air flow sinks, passes over the partition along the second connecting portion 15 at the lower edge of the partition 3, and arrives in the first cavity 12 to dissipate heat for the heating element in the first cavity 12. At the same time, it absorbs heat and turns into hot air flow to rise again, thereby forming a natural circulation airflow field in the two cavities inside the electrical box, suppressing local heating. This natural circulation method can reduce the use loss of the radiator, increase the service life of the radiator, and improve the reliability of the electrical box.

[0101] As shown in Figure 5, the heat sources on the first and second electrical components 21, 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 the key components of the air conditioning unit. The temperature rise priority of the common-mode chokes on the third and fourth electrical components 23, 24 is ranked second. The fifth and sixth electrical components 25, 26 have higher temperature resistance and are ranked third. Based on the priority, the first and second heat sinks 4, 5 prioritize heat dissipation for the first and second electrical components 21, 22, while also meeting the heat dissipation requirements of the third, fourth, fifth, and sixth electrical components 23, 24, 25, and 26.

[0102] The first and second electrical components 21 and 22 have the same structure, both primarily comprising four heating zones. The first electrical component 21 is provided with heating zones 1, 2, 3, and 4, while the second electrical component 22 is provided with heating zones 5, 6, 7, and 8. The third electrical component 23 is provided with heating zone 9, the fourth electrical component 24 is provided with heating zone 10, the fifth electrical component 25 is provided with heating zone 11, and the sixth electrical component is provided with heating zone 12.

[0103] When the electrical box is in operation, the temperatures of heating zones 1 and 2 are higher than those of heating zone 3, which is higher than that of heating zone 4. The temperatures of heating zones 5 and 6 are higher than those of heating zone 7, which 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. The temperatures of heating zones 9 and 10 are higher than those of heating zones 11 and 12. Therefore, the priority for cooling is as follows: heating zones 1 and 2 precede heating zone 3, which precedes heating zone 4; heating zones 5 and 6 precede heating zone 7, which precedes heating zone 8; heating zones 1-8 precede heating zones 9 and 10; and heating zones 9 and 10 precede heating zones 11 and 12.

[0104] When the first radiator 4 and the second radiator 5 are operating normally, the wind field in the electrical box is as shown in Figure 6. The second radiator 5 blows air upward 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 radiator 5 can be better aligned with the heating area 5 on the second electrical component 22, and at the same time, a certain amount of exhaust space can be provided for the rear of the second radiator 5 to ensure the wind strength of the second radiator 5. The second radiator 5 can effectively dissipate heat for almost all the heating components on the second electrical device 22. When the air flows upward, it is blocked by the bus capacitor on the heating zone 8. The blocked airflow then flows in two different directions: about 50% of the airflow passes through the right side of the bus capacitor on the heating zone 8, and after passing through the bus capacitor, it passes through the sixth electrical device 26 with higher heat resistance, and continues to flow upward and left. Then the airflow is blocked by the choke on the heating zone 10 and blows through the choke from the upper and lower directions. The airflow that bypasses the choke on the heating zone 10 upward blows along the wall of the electrical box to the third electrical device 23 for its heat dissipation and flows to the rear of the first radiator 4, providing exhaust airflow for the first radiator 4; the other 50% or so of the airflow flows from the bus capacitor on the second electrical device 22. The air passes through the left and upper sides of the line capacitor, and blows upward and leftward through the choke of the third electrical component 23, dissipating heat for it effectively, and then flows to the rear of the first radiator 4, providing sufficient airflow for the first radiator 4; after the first radiator 4 extracts the airflow, it sends air forward. The first radiator 4 is aimed at all the heating components on the first electrical component 21. After blowing through the various heating 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 to the bus capacitor (i.e., heating area 4) of the first electrical component 21, achieving effective heat dissipation of the bus capacitor. The other part flows through the heating areas 2 and 3 to dissipate heat for it, and flows to the rear of the second radiator 5, providing the second radiator 5 with sufficient airflow extraction and air supply, ensuring the air outlet intensity of the second radiator 5. In this way, a circulating flow of air is formed to achieve the purpose of dissipating heat for all heating components.

[0105] Through the description of multiple embodiments of the electrical box disclosed herein, it can be seen that the embodiments of the electrical box disclosed herein adopt a partition layering design, and at the same time utilize the distribution and priority design of heat sources to achieve a reduction in return air temperature while taking into account the heat dissipation requirements of all heat sources. When the ambient temperature is high, a radiator is used to perform strong convection circulation heat dissipation on the electrical components in the electrical box. When the ambient temperature is low and the radiator is turned off, natural circulation heat dissipation is used to suppress localized heating. This increases the critical temperature controlled by the radiator, increases the service life of the radiator, and improves the reliability of the electrical box. At the same time, it meets the temperature rise requirements of all components under all operating conditions. Compared with the solution of setting an evaporator and a microchannel heat exchanger, it can control costs.

[0106] Based on the above-mentioned electrical appliance box, the present disclosure further provides an air-conditioning unit, which includes the above-mentioned electrical appliance box.

[0107] The positive technical effects of the electrical box in the above embodiments are also applicable to the air-conditioning unit and will not be described in detail here.

[0108] In addition to air-conditioning units, the electrical appliance box provided in the embodiment of the present disclosure can also be used on other electrical appliances that require an electrical appliance box, which will not be described in detail here.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that without departing from the principles of the present disclosure, the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents. These modifications and equivalent replacements should all be included in the scope of the technical solutions claimed for protection in the present disclosure.

Claims

1. An electrical box, comprising: A box body (1), wherein a receiving cavity (11) is provided in the box body (1); A plurality of electrical components (2) are arranged in the accommodating cavity (11); and A partition (3) is arranged in the accommodating chamber (11), and the partition (3) is configured to separate the accommodating chamber (11) into a first chamber (12) and a second chamber (13). When the electrical box is in a working state, the temperature in the first chamber (12) is different from the temperature in the second chamber (13). A first connecting portion (14) connecting the first chamber (12) and the second chamber (13) is provided at a position close to the top wall of the accommodating chamber (11) in the accommodating chamber (11), and a second connecting portion (15) connecting the first chamber (12) and the second chamber (13) is provided at a position close to the bottom wall of the accommodating chamber (11). Gas in the first chamber (12) and gas in the second chamber (13) circulate through the first connecting portion (14) and the second connecting portion (15) to perform heat exchange.

2. The electrical box according to claim 1, wherein: There is a first gap between the top (31) of the partition (3) and the top wall of the accommodating chamber (11), and the first gap forms the first connecting portion (14); and / or there is a second gap between the bottom (32) of the partition (3) and the bottom wall of the accommodating chamber (11), and the second gap forms the second connecting portion (15).

3. The electrical box according to claim 1 or 2, wherein: The partition (3) is connected to the top wall of the accommodating chamber (11), and a first through hole is provided on the partition (3) near the top wall of the accommodating chamber (11), and the first through hole forms the first connecting portion (14); and / or the partition (3) is connected to the bottom wall of the accommodating chamber (11), and a second through hole is provided on the partition (3) near the bottom wall of the accommodating chamber (11), and the second through hole forms the second connecting portion (15).

4. The electrical box according to any one of claims 1 to 3, wherein: The temperature in the first cavity (12) is greater than the temperature in the second cavity (13), and the plurality of electrical devices (2) are all arranged in the first cavity (12); or the total heat generated by the electrical devices (2) arranged in the first cavity (12) is greater than the total heat generated by the electrical devices (2) arranged in the second cavity (13).

5. The electrical box according to any one of claims 1 to 4, wherein: 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) arranged in the first cavity (12); the heat generated by the first electrical device (21) and the heat generated by the second electrical device (22) are both greater than the heat generated by the third electrical device (23); and the heat generated by the first electrical device (21) and the heat generated by the second electrical device (22) are both greater than the heat generated by the fourth electrical device (24); the first electrical device (21) and the second electrical device (22) are arranged side by side at a position close to the bottom wall of the accommodating cavity (11); and the distance between the second electrical device (22) and the bottom wall of the accommodating cavity (11) is greater than the distance between the first electrical device (21) and the bottom wall of the accommodating cavity (11); and the third electrical device (23) and the fourth electrical device (24) are arranged side by side at a position close to the top wall of the accommodating cavity (11).

6. The electrical box according to claim 5, wherein: 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) differ by 180°, so that the high temperature zone of the first electrical device (21) and the low temperature zone of the second electrical device (22) are arranged adjacent to each other, and the low temperature zone of the first electrical device (21) and the high temperature zone of the second electrical device (22) are arranged adjacent to each other.

7. The electrical box according to claim 5 or 6, wherein: The bottom (32) of the partition (3) is basically arranged opposite to the center line of the high temperature zone of the first electrical component (21) close to the bottom wall of the accommodating cavity (11), and the top (31) of the partition (3) is basically arranged opposite to the edge of the top wall of the third electrical component (23) and the fourth electrical component (24) away from the accommodating cavity (11).

8. The electrical box according to any one of claims 5 to 7, further comprising a first radiator (4) and a second radiator (5) arranged in the accommodating 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 radiator (4) is arranged between the first electrical component (21) and the third electrical component (23), and the second radiator (5) is arranged between the second electrical component (22) and the bottom wall of the accommodating cavity (11).

9. The electrical box according to claim 8, wherein: The first radiator (4) and the second radiator (5) are constructed so that the airflow blown out by the first radiator (4) flows toward the first electrical device (21) and reaches the return air outlet of the second radiator (5), and the airflow blown out by the second radiator (5) flows toward the second electrical device (22), then flows through the fourth electrical device (24) and the third electrical device (23) and reaches the return air outlet of the first radiator (4).

10. The electrical box according to claim 8 or 9, wherein: The air outlet of the first radiator (4) is arranged obliquely relative to the edge of the first electrical device (21), so that the air outlet of the first radiator (4) faces the second radiator (5).

11. The electrical box according to any one of claims 8 to 10, wherein: The angle between the plane where the air outlet of the first radiator (4) is located and the edge line of the first electrical component (21) close to the third electrical component (23) is 35° to 45°.

12. The electrical box according to any one of claims 8 to 11, wherein: A preset gap is provided between the second heat sink (5) and the bottom wall of the accommodating cavity (11), and a side of the second heat sink (5) away from the first heat sink (4) is inclined toward the bottom wall of the accommodating cavity (11), so that the outlet of the second heat sink (5) faces the area between the second electrical component (22) and the fourth electrical component (24) and the side wall of the accommodating cavity (11).

13. The electrical box according to any one of claims 8 to 12, wherein: The angle between the plane where the air outlet of the second heat sink (5) is located and the edge line of the second electrical device (22) close to the bottom wall of the accommodating cavity (11) is 5° to 10°.

14. The electrical box according to any one of claims 8 to 13, wherein: The first electrical component (21), the second electrical component (22), the third electrical component (23) and the fourth electrical component (24) are all arranged in the first cavity (12), and in a 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 radiator (4) and the height of the second radiator (5) are substantially equal.

15. The electrical box according to any one of claims 8 to 14, wherein: The partition plate (3) is provided with a third through hole (33), and the top surface of the first heat sink (4) is exposed from the third through hole (33).

16. The electrical box according to any one of claims 8 to 15, further comprising a control device, the control device being connected to the first radiator (4) by signal, the first radiator (4) having a first opening temperature and a first closing temperature, the control device being configured to control the first radiator (4) to open when the ambient temperature is greater than or equal to the first opening temperature, and to control the first radiator (4) to close when the ambient temperature is less than or equal to the first closing temperature, wherein: The first opening temperature is greater than the first closing temperature; and / or the control device is connected to the second radiator (5) by signal, the second radiator (5) has a second opening temperature and a second closing temperature, the control device is configured to control the second radiator (5) to open when the ambient temperature is greater than or equal to the second opening temperature, and to control the second radiator (5) to close when the ambient temperature is less than or equal to the second closing temperature, wherein the second opening temperature is greater than the second closing temperature.

17. The electrical box according to claim 16, wherein: The first opening temperature is 2° C. to 5° C. greater than the first closing temperature; and / or the second opening temperature is 2° C. to 5° C. greater than the second closing temperature.

18. An air conditioning unit, comprising the electrical appliance box according to any one of claims 1 to 17.

Images