Electric appliance box assembly and air conditioning unit

Abstract

The application provides an electric appliance box assembly and an air conditioning unit. The electric appliance box assembly comprises a box body, an electric appliance box air outlet is arranged on the upper part of the box body, an electric appliance box air inlet is arranged on the lower part of the box body, a control mainboard is arranged in the box body, the control mainboard is located at the electric appliance box air outlet, an inductor is arranged on the control mainboard, and the inductor is located on the part of the control mainboard close to the electric appliance box air outlet. The electric appliance box assembly and the air conditioning unit provided by the application arrange the inductor at the electric appliance box air outlet, avoid the heat of the inductor from entering the box body without hindering the gas flow in the box body, so that the heat of the inductor cannot increase the overall temperature in the box body, the heat dissipation efficiency of other structures in the box body is ensured, and the heat dissipation effect of the electric appliance box is improved.

Description

Technical Field

[0001] This invention relates to the field of air handling equipment technology, and in particular to an electrical box assembly and an air conditioning unit. Background Technology

[0002] The integrated controller is housed inside the electrical box. The heat-generating components on the controller's mainboard are unevenly distributed, and the power density of these components varies significantly. For example, in a PFC circuit, the PFC inductor withstands switching ripple currents of tens of kHz. The inductor core has high hysteresis losses, leading to generally high temperatures. This can easily cause inductor core saturation and a decrease in inductance, severely impacting the electrical performance and reliability of the circuit system. Current electrical box designs fail to consider the distribution of power density on the PCB, nor do they take into account the airflow characteristics of the space near the electrical box within the overall system flow, resulting in poor heat dissipation within the electrical box. Summary of the Invention

[0003] In order to solve the technical problem of poor heat dissipation of electrical boxes in the prior art, an electrical box assembly and an air conditioning unit are provided in which an inductor is placed at the air outlet of the electrical box to ensure heat dissipation.

[0004] This invention provides an electrical box assembly, comprising:

[0005] The box body has an air outlet for the electrical box at the top and an air inlet for the electrical box at the bottom.

[0006] A control motherboard is disposed inside the box and located at the air outlet of the electrical box;

[0007] An inductor is disposed on the control motherboard and is located on the portion of the control motherboard near the air outlet of the electrical box.

[0008] The control board is also equipped with a choke, which is located on the side of the inductor away from the air outlet of the electrical box.

[0009] The control board also includes a capacitor located below the inductor in the vertical direction.

[0010] The electrical box assembly is disposed within a heat dissipation duct, and the airflow direction of the heat dissipation duct is from the bottom of the box to the top of the box.

[0011] The box body includes a first side panel, on which louvers are provided, and the louvers constitute the air inlet of the electrical box.

[0012] The electrical box assembly further includes louvers, which are disposed at the louver openings and at least a portion of the louvers protrude from the box body; and / or, the louvers are disposed at the air outlet of the electrical box and at least a portion of the louvers protrude from the box body.

[0013] The box body also includes a base plate, which has a fixing part near the air outlet of the electrical box and an air inlet part away from the air outlet of the electrical box. The fixing part is disposed on a preset structure, and the air inlet part is provided with heat dissipation holes, which constitute the air inlet of the electrical box.

[0014] The electrical box assembly further includes a partition, which is disposed inside the box and divides the inside of the box into a first receiving cavity and a second receiving cavity. The partition and the bottom plate have a first gap. The first receiving cavity communicates with the second receiving cavity through the first gap. The control motherboard is disposed in the second receiving cavity, and the heat dissipation hole communicates with the first receiving cavity.

[0015] The present invention provides an air conditioning unit, including the above-mentioned electrical box assembly.

[0016] The air conditioning unit also includes:

[0017] case;

[0018] A partition is disposed inside the housing, and the partition divides the interior of the housing into an outdoor cavity and an indoor cavity. An outdoor air outlet is provided on the top surface of the housing, and an outdoor air inlet is provided on the side wall of the housing. Both the outdoor air outlet and the outdoor air inlet are connected to the outdoor cavity.

[0019] A fan, wherein the fan is disposed in the outdoor cavity and the fan is located at the outdoor air outlet;

[0020] The electrical box assembly is disposed inside the outdoor cavity, below the fan, and is disposed on the partition.

[0021] A flow guide is formed on the separator, and the flow guide is located between the outdoor air inlet and the electrical box air inlet.

[0022] The separator has a trapezoidal cross-section, and the hypotenuse of the trapezoid forms the flow guide.

[0023] The box body also includes a first side plate, the shell has a first panel, there is a second gap between the first side plate and the first panel, and louvers are provided on the first side plate, the louvers are connected to the second gap.

[0024] The fan is equipped with a guide ring, and the upper edge of the air outlet of the electrical box is at the same horizontal plane as the lower edge of the guide ring.

[0025] The electrical box assembly and air conditioning unit provided by the present invention place the inductor at the air outlet of the electrical box. Without obstructing the air flow inside the box, the heat of the inductor is prevented from entering the box. This ensures that the heat of the inductor does not increase the overall temperature inside the box, thus ensuring the heat dissipation efficiency of other structures inside the box and improving the heat dissipation effect of the electrical box. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the electrical box assembly provided in an embodiment of the present invention;

[0027] Figure 2 An airflow simulation diagram of the electrical box assembly provided in an embodiment of the present invention;

[0028] Figure 3 This is a structural perspective view of an air conditioning unit provided in an embodiment of the present invention;

[0029] Figure 4 An airflow simulation diagram of an air conditioning unit provided in an embodiment of the present invention;

[0030] In the picture:

[0031] 1. Box body; 11. Electrical box air outlet; 2. Control main board; 21. Inductor; 22. Choke; 23. Capacitor; 12. First side panel; 13. Louvered holes; 14. Base plate; 15. Heat dissipation holes; 16. Partition; 17. First spacing; 3. Housing; 4. Divider; 32. Outdoor air inlet; 5. Fan; 41. Air guide; 33. First panel; Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0033] like Figures 1 to 4The appliance box assembly shown includes: a box body 1, with an air outlet 11 at the top and an air inlet at the bottom; a control board 2, housed within the box body 1 and located at the air outlet 11; and an inductor 21, mounted on the control board 2 and located on the portion of the control board 2 closest to the air outlet 11. Positioning the inductor 21 at the air outlet 11 prevents heat from entering the box body 1 without obstructing airflow, thus ensuring that the heat from the inductor 21 does not raise the overall temperature inside the box body 1 and maintains efficient heat dissipation for other internal structures, thereby improving the overall heat dissipation of the appliance box.

[0034] The electrical box assembly is disposed within a heat dissipation duct, and the airflow direction of the heat dissipation duct is from the bottom to the top of the box body 1. Part of the gas in the heat dissipation duct enters the box body 1 through the air inlet of the electrical box, flows through the inductor 21, and then flows out through the air outlet 11, thus dissipating heat from the inductor 21. Simultaneously, the gas in the heat dissipation duct flows through the air outlet 11, creating a negative pressure at the air outlet 11. This ensures that the gas that has completed heat exchange with the inductor 21 can directly flow out through the air outlet 11, preventing stagnant circulation inside the box body 1.

[0035] The inductor 21 includes a PFC inductor, copper foil below the PFC inductor, and filtered AC side copper foil.

[0036] Preferably, the air outlet 11 of the electrical box is located on the side wall of the upper part of the box body 1, so as to prevent condensation and other water generated in the space where the electrical box assembly is located from dripping directly into the box body 1 through the air outlet 11, thus ensuring the safety of the electrical box assembly.

[0037] The control motherboard 2 is also equipped with a choke 22, which is located on the side of the inductor 21 away from the air outlet 11 of the electrical box. The airflow flowing through the inside of the box 1 will first flow through the choke 22 and then through the inductor 21. Since the heat of the choke 22 is lower than that of the inductor 21, the choke 22 can be cooled first, and then the inductor 21 can be cooled. After the air cools the choke 22, it can still cool the inductor 21, thus ensuring the cooling effect of both the choke 22 and the inductor 21.

[0038] Similarly, the control board 2 also includes a capacitor 23, which is located below the inductor 21 in the vertical direction. The airflow inside the housing 1 first passes through the capacitor 23 and then through the inductor 21. Since the heat of the capacitor 23 is lower than that of the inductor 21, the capacitor 23 can be cooled first, and then the inductor 21 can be cooled. After cooling the capacitor 23, the air can still cool the inductor 21, ensuring the cooling effect of both the capacitor 23 and the inductor 21. The capacitor 23 includes a bus electrolytic capacitor.

[0039] There are multiple capacitors 23, which are arranged vertically away from the inductor 21 to minimize the obstruction of gas flow by the capacitors 23, thereby ensuring the heat dissipation effect of the capacitors 23 and the inductor 21.

[0040] In one embodiment, the housing 1 includes a first side plate 12 with louvered openings 13 forming the air inlet of the electrical box. The electrical box assembly also includes louvers located at the louvered openings 13, with at least a portion of the louvers protruding from the housing 1. The louvers obstruct the flow of gas adhering to the outer surface of the housing 1, forcing this gas to flow into the housing 1 under the guidance of the louvers, thus ensuring the airflow into the housing 1 and effectively improving the heat dissipation of the electrical box assembly. Preferably, the louvers at the louvered openings 13 are inclined, which guides the gas flow, allowing it to pass more smoothly into the housing 1, increasing the gas velocity entering the housing 1 and thus improving the heat dissipation of the electrical box assembly. The inclination angle of the louvers ranges from 30° to 60°, preferably 45°.

[0041] Furthermore, a waterproof baffle is installed at the louver opening 13. The waterproof baffle does not block the louver opening 13, but can prevent condensation generated in the space where the electrical box assembly is located from entering the box body 1 through the louver opening 13, thereby further ensuring the safety of the electrical box assembly.

[0042] The louvers are positioned at the air outlet 11 of the electrical box, with at least a portion of the louvers protruding from the box body 1. The louvers shield the air outlet 11 of the electrical box, preventing condensation from the environment surrounding the electrical box from entering the box body 1 through the air outlet 11, thus ensuring the safety of the electrical box assembly. Preferably, the louvers at the air outlet 11 are angled, which ensures both effective airflow from the air outlet 11 and a degree of water-blocking effect, further guaranteeing the safety of the electrical box assembly.

[0043] Furthermore, a waterproof baffle is provided at the air outlet 11 of the electrical box. The waterproof baffle will not block the air outlet 11 of the electrical box, but can prevent condensation generated in the space where the electrical box assembly is located from entering the box body 1 through the air outlet 11 of the electrical box, thereby further ensuring the safety of the electrical box assembly.

[0044] The housing 1 also includes a base plate 14, which has a fixing part near the air outlet 11 of the electrical box and an air inlet part away from the air outlet 11. The fixing part is disposed on a preset structure, and the air inlet part is provided with heat dissipation holes 15, which constitute the air inlet of the electrical box. The airflow entering the housing 1 through the heat dissipation holes 15 will form a large pressure inside the housing 1, thereby forcing the gas to be discharged from the air outlet 11 of the electrical box, avoiding the formation of obstructed circulation inside the housing 1, and improving the heat dissipation effect of the electrical box assembly.

[0045] The electrical box assembly further includes a partition 16, which is disposed within the box body 1 and divides the interior of the box body 1 into a first receiving cavity and a second receiving cavity. A first gap 17 exists between the partition 16 and the bottom plate 14. The first receiving cavity communicates with the second receiving cavity through the first gap 17. The control mainboard 2 is disposed within the second receiving cavity, and the heat dissipation hole 15 communicates with the first receiving cavity. The partition 16 allows gas entering the box body 1 to flow towards the control mainboard 2 through the first gap 17, thereby improving the heat dissipation effect on the control mainboard 2.

[0046] The present invention provides an air conditioning unit, including the above-mentioned electrical box assembly.

[0047] The air conditioning unit further includes: a housing 3; a partition 4, which is disposed within the housing 3 and divides the interior of the housing 3 into an outdoor cavity and an indoor cavity. An outdoor air outlet is provided on the top surface of the housing 3, and an outdoor air inlet 32 ​​is provided on the side wall of the housing 3. Both the outdoor air outlet and the outdoor air inlet 32 ​​communicate with the outdoor cavity; a fan 5, which is disposed within the outdoor cavity and located at the outdoor air outlet; and an electrical box assembly, disposed within the outdoor cavity, below the fan 5, and mounted on the partition 4. By placing the electrical box assembly below the fan 5, the fan 5 generates negative pressure at the electrical box outlet 11, thereby forcing gas to flow into the box 1, increasing the heat dissipation effect of the electrical box assembly, and achieving a large air volume intake.

[0048] Furthermore, a guide section 41 is formed on the partition 4, located between the outdoor air inlet 32 ​​and the electrical box air inlet. The guide section 41 directs the airflow from the outdoor air inlet 32 ​​towards the electrical box air inlet, thereby increasing the gas velocity and flow rate at the electrical box air inlet and improving the heat dissipation efficiency of the electrical box assembly. Simultaneously, the guide section 41 also increases the flow of gas towards the outdoor air outlet, ensuring the heat exchange efficiency of the air conditioning unit. The partition 4 has a trapezoidal cross-section, with the hypotenuse forming the guide section 41. When the partition 4 has a trapezoidal cross-section, the indoor heat exchanger can be vertically mounted, improving its heat exchange efficiency.

[0049] The housing 1 further includes a first side plate 12, and the housing 3 has a first panel 33. A second gap exists between the first side plate 12 and the first panel 33. The first side plate 12 is provided with louvered holes 13, which communicate with the second gap. Gas flows through the second gap under the action of the fan 5. At this time, the housing 1 can take in air through the louvered holes 13 that communicate with the second gap, avoiding the partition 4 from blocking the housing 1 and affecting the air intake of the electrical box assembly.

[0050] The fan 5 is equipped with a guide ring, and the upper edge of the air outlet 11 of the electrical box is at the same horizontal plane as the lower edge of the guide ring. The negative pressure generated by the fan 5 at the guide ring is the greatest, that is, it can generate a large negative pressure at the air outlet 11 of the electrical box, thereby increasing the gas flow rate and gas velocity inside the box 1, and further improving the heat dissipation effect of the electrical box assembly.

[0051] Preferably, the air conditioning unit is a rooftop unit.

[0052] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An electrical box assembly, characterized in that: include: Box body (1), the upper part of the box body (1) is provided with an electrical box air outlet (11), and the lower part of the box body (1) is provided with an electrical box air inlet; Control motherboard (2), the control motherboard (2) is disposed inside the box (1), and the control motherboard (2) is located at the air outlet (11) of the electrical box; Inductor (21), the inductor (21) is disposed on the control main board (2), and the inductor (21) is located on the part of the control main board (2) near the air outlet (11) of the electrical box; The electrical box assembly is disposed in the heat dissipation duct, and the airflow direction of the heat dissipation duct is from the bottom of the box body (1) to the top of the box body (1). The box body (1) also includes a base plate (14), which has a fixing part near the air outlet (11) of the electrical box and an air inlet part away from the air outlet (11) of the electrical box. The fixing part is set on a preset structure, and the air inlet part is provided with heat dissipation holes (15). The heat dissipation holes (15) constitute the air inlet of the electrical box. The electrical box assembly also includes a partition (16), which is disposed inside the box body (1) and divides the interior of the box body (1) into a first receiving cavity and a second receiving cavity. The partition (16) and the bottom plate (14) have a first gap (17). The first receiving cavity is connected to the second receiving cavity through the first gap (17). The control main board (2) is disposed in the second receiving cavity, and the heat dissipation hole (15) is connected to the first receiving cavity.

2. The electrical box assembly according to claim 1, characterized in that: The control motherboard (2) is also provided with a choke (22), which is located on the side of the inductor (21) away from the air outlet (11) of the electrical box.

3. The electrical box assembly according to claim 1, characterized in that: The control board (2) also includes a capacitor (23), which is located on the lower side of the inductor (21) in the vertical direction.

4. The electrical box assembly according to claim 1, characterized in that: The box body (1) includes a first side plate (12), on which louvered holes (13) are provided, and the louvered holes (13) constitute the air inlet of the electrical box.

5. The electrical box assembly according to claim 4, characterized in that: The electrical box assembly further includes louvers, which are disposed at the louver holes (13) and at least a portion of the louvers protrude from the box body (1); and / or, the louvers are disposed at the air outlet (11) of the electrical box and at least a portion of the louvers protrude from the box body (1).

6. An air conditioning unit, characterized in that: Includes the electrical box assembly according to any one of claims 1 to 5.

7. The air conditioning unit according to claim 6, characterized in that: The air conditioning unit also includes: Shell (3); A partition (4) is provided inside the housing (3), and the partition (4) divides the interior of the housing (3) into an outdoor cavity and an indoor cavity. An outdoor air outlet is provided on the top surface of the housing (3), and an outdoor air inlet (32) is provided on the side wall of the housing (3). Both the outdoor air outlet and the outdoor air inlet (32) are connected to the outdoor cavity. Fan (5), the fan (5) is disposed in the outdoor cavity and the fan (5) is located at the outdoor air outlet; The electrical box assembly is located inside the outdoor cavity, below the fan (5), and is located on the partition (4).

8. The air conditioning unit according to claim 7, characterized in that: A flow guide (41) is formed on the separator (4), and the flow guide (41) is located between the outdoor air inlet (32) and the electrical box air inlet.

9. The air conditioning unit according to claim 8, characterized in that: The cross-section of the separator (4) is trapezoidal, and the hypotenuse of the trapezoid constitutes the flow guide (41).

10. The air conditioning unit according to claim 7, characterized in that: The box body (1) further includes a first side plate (12), the shell (3) has a first panel (33), there is a second gap between the first side plate (12) and the first panel (33), and the first side plate (12) is provided with louver holes (13), which are connected to the second gap.

11. The air conditioning unit according to claim 7, characterized in that: The fan (5) is provided with a guide ring, and the upper edge of the air outlet (11) of the electrical box is at the same level as the lower edge of the guide ring.

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