WO2022199031A1 - Electric device box and air-conditioner outdoor unit - Google Patents

Abstract

An electric device box and an air-conditioner outdoor unit. The electric device box comprises an electric device box main body (210) and an air guide plate (230), wherein the electric device box main body (210) comprises a bottom plate (280) and a top plate (290); the bottom plate (280) is provided with a plurality of air intake holes (270); the top plate (290) is provided with air output holes (260); and the air guide plate (230) is obliquely arranged on the lower side of the bottom plate (280), and the projection of the air guide plate (230) on the bottom plate (280) covers the air intake holes (270). The oblique air guide plate (230) has the function of guiding the flow direction of air. Air enters a gap between the air guide plate (230) and the bottom plate (280) along the oblique air guide plate (230), and enters the electric device box through the air intake holes (270). Therefore, there is a certain included angle between a fluid, which enters the interior of the electric device box after being guided by the air guide plate (230), and a horizontal direction, such that a vortex decreases, and a heat-dissipation through path is formed from bottom to top, thereby improving the heat-dissipation efficiency of the electric device box.

Description

Electrical box and air conditioner outdoor unit

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based on the CN application number 202110313431.3 and the filing date is March 24, 2021, and claims its priority. The disclosure of the CN application is hereby incorporated into the present application as a whole.

technical field

The present disclosure relates to an electrical box and an outdoor unit of an air conditioner.

Background technique

The overall structure of the electrical box of the top-flow air conditioner outdoor unit is small, while the electrical components in the electrical box are relatively compact in layout, with high heating power density and high overall temperature. Generally, air cooling is used to dissipate heat from the electrical box. Considering the requirements of dustproof and waterproof, the heat dissipation window on the electrical box should not be too large, which will lead to less air volume inside the electrical box, so the actual heat dissipation effect is not ideal.

It should be noted here that the statements in this Background section merely provide background related to the present disclosure, and do not necessarily constitute prior art.

SUMMARY OF THE INVENTION

The present disclosure provides an electrical box and an air conditioner outdoor unit to improve the heat dissipation effect of the electrical box.

A first aspect of the present disclosure provides an electrical box, including:

The main body of the electrical box includes a bottom plate and a top plate, the bottom plate is provided with a plurality of air inlet holes, and the top plate is provided with air outlet holes; and

The wind deflector is obliquely arranged on the lower side of the bottom plate, and the projection of the wind deflector on the bottom plate covers at least part of the air inlet holes.

In some embodiments, the electrical box further includes a partition, which is disposed in the inner cavity of the electrical box main body and divides the inner cavity into a first cavity and a second cavity in a thickness direction, and a ventilation hole is provided on the partition.

In some embodiments, among the plurality of air inlet holes, the number of the air inlet holes located in the first cavity is greater than the number of the air inlet holes located in the second cavity.

In some embodiments, the electrical box further includes at least two components disposed in the electrical box body, the at least two components include a first component and a second component, and the heat generation of the first component is greater than that of the first component. The heat generation of two components, the first component is arranged in the first cavity, and the second component is arranged in the second cavity.

In some embodiments, the first component includes a compressor drive board, and the second component includes a main control board.

In some embodiments, the plurality of air inlet holes are located in the first cavity.

In some embodiments, a plurality of air inlet holes are disposed adjacent to the partition.

In some embodiments, the top plate is inclined relative to the bottom plate.

In some embodiments, the included angle between the top plate and the bottom plate ranges from 15° to 30°.

In some embodiments, the air outlet holes are oblong holes.

A second aspect of the present disclosure provides an outdoor unit of an air conditioner, including a casing and the above-mentioned electrical box, an air outlet is provided at the top of the casing, and the electrical box is installed in the casing.

Based on the aspects provided by the present disclosure, the inclined air deflector forms a guiding effect on the flow direction of the air, and the air enters the gap between the air deflector and the bottom plate along the inclined air deflector, and enters the electrical box through the air inlet hole Therefore, the fluid entering the electrical box after being guided by the air deflector has a certain angle with the horizontal direction, reducing the eddy current, and forming a through heat dissipation path from the bottom to the top, thereby improving the heat dissipation efficiency of the electrical box.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. 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 attached image:

FIG. 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the disclosure;

Fig. 2 is the structural representation of the electrical box in Fig. 1;

3 is a schematic structural diagram of an angle of the main body of the electrical box in FIG. 2;

4 is a schematic structural diagram of another angle of the main body of the electrical box in FIG. 2;

Fig. 5 is the structural representation of the separator in Fig. 2;

Fig. 6 is the schematic diagram of the air flow in the electrical box shown in Fig. 2;

FIG. 7 is a schematic diagram of the layout and air flow of the main control board in the electrical box shown in FIG. 2 .

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses in any way. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods, and apparatus should be considered part of the authorized description. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be positioned in other different ways, and the spatially relative descriptions used herein interpreted accordingly.

Referring to FIG. 1 , an embodiment of the present disclosure provides an outdoor unit of an air conditioner. The air conditioner outdoor unit includes a housing 100 and an electrical box 200 . The top of the casing 100 is provided with an air outlet, and the electrical box 200 is installed in the casing 100 . Air enters from the condenser gaps on the left and lower sides of the housing 100, flows upward under the action of the fan, and flows out from the air outlet at the top.

Referring to FIG. 1 , the electrical box 200 is installed on the right side wall of the housing 100 . When the air flows upward along the side wall of the housing 100, it hits the bottom plate of the electrical box 200 and then bends, and will flow outward along the bottom plate of the electrical box 200 to form a large stagnant vortex, which will cause the heat to fail to flow out effectively. .

In view of this, embodiments of the present disclosure provide an electrical box 200 . Referring to FIGS. 2 to 4 , in some embodiments, the electrical box 200 includes an electrical box body 210 and an air guide plate 230 . The electrical box body 210 includes a bottom plate 280 and a top plate 290 . The bottom plate 280 is provided with an air inlet hole 270 . The top plate 290 is provided with an air outlet 260 . The air deflector 230 is obliquely disposed on the lower side of the bottom plate 280 , and the projection of the air deflector 230 on the bottom plate 280 covers at least part of the air inlet hole 270 .

The inclined air guide plate 230 forms a guiding effect on the flow of the air. The air enters the gap between the air guide plate 230 and the bottom plate 280 along the inclined air guide plate 230 and enters the electrical box 200 through the air inlet hole 270. Therefore, the fluid entering the electrical box after being guided by the air deflector 230 has a certain angle with the horizontal direction, which reduces the eddy current and forms a through heat dissipation path from bottom to top, thereby improving the heat dissipation efficiency of the electrical box.

In other embodiments, the air guide plate 230 may cover part of the air inlet hole 270 . In this way, the airflow directions of some of the air inlet holes 270 are arranged obliquely, thereby reducing eddy currents. In other embodiments, the air guide plate 230 may cover all the air inlet holes 270 . In this way, the flow directions of all the airflows entering the interior of the electrical box are inclined, which reduces the eddy current and improves the heat dissipation efficiency. The air guide plate 230 completely covers the air inlet hole 270 and can also play a waterproof role. Specifically, the edge of the air guide plate 230 may exceed the coverage area of the plurality of air inlet holes 270 .

In some embodiments, the electrical box 200 further includes a partition 240 . The partition plate 240 is disposed in the inner cavity of the electrical box main body 210 and divides the inner cavity into the first cavity 211 and the second cavity 212 in the thickness direction. Ventilation holes 241 are provided on the partition plate 240 . The air in the first cavity 211 can enter the second cavity 212 through the ventilation holes 241 to dissipate heat from the components in the second cavity 212 .

In some embodiments, referring to FIG. 4 , the bottom plate 280 is provided with a plurality of air inlet holes 270 . Among the plurality of air inlet holes 270 , the number of air inlet holes located in the first cavity 211 is greater than that of the air inlet holes located in the second cavity 212 . The air volume entering the first cavity 211 is greater than the air volume entering the second cavity 212 . The components are arranged according to the air flow inside the electrical box above, and the components with larger heat generation are arranged in the first cavity 211 , and the components with smaller heat generation are arranged in the second cavity 212 . For example, the electrical box includes at least two components arranged in the electrical box main body 210, the at least two components include a first component 310 and a second component 320, wherein the heat generation of the first component 310 is greater than that of the second component For the heat generation of the device 320 , the first component 310 is arranged in the first cavity 211 , and the second component 310 is arranged in the second cavity 212 .

Specifically, the electrical box 200 further includes a compressor drive board and a main control board. The compressor drive board has a relatively large heat generation, the compressor drive board is arranged in the first cavity 211 , and the main control board is arranged in the second cavity 212 .

In other embodiments, a plurality of air inlet holes 270 are provided on the bottom plate, and the plurality of air inlet holes are all located in the first cavity 211 . Since all the air inlet holes are opened in the first cavity 211 , a vertical through-air passage is formed between the air inlet holes and the air outlet holes on the top plate 290 . In addition, the flow rate of the air fluid in the first cavity 211 is relatively large, and the pressure is relatively small, and a lateral pressure difference is formed between the first cavity 211 and the second cavity 212 inside the electrical box. The first cavity 211 flows into the second cavity 212 and flows out along the fixed wall surface to form a three-dimensional air duct to enhance the heat dissipation performance.

In some embodiments, a plurality of air inlet holes 270 are disposed adjacent to the partition plate 240 . A plurality of air inlet holes 270 are disposed close to the partition plate 240 so that the air fluid in the first cavity 211 can directly enter the second cavity 212 through the ventilation holes 241 of the partition plate 240 .

In the flow field of the whole machine, the air duct in the electrical box 200 is similar to the external wind field, from bottom to top. If the air outlet is parallel to the wall in the air inlet direction, the fluid will hit the upper side of the electrical box due to inertial action. Deflection bounce occurs, resulting in the inability to effectively dissipate heat inside the electrical box. Accordingly, in some embodiments, the top plate 290 is disposed at an angle relative to the bottom plate 280 .

Specifically, the included angle between the top plate 290 and the horizontal plane is between 15° and 30°. The air outlet hole 260 on the top plate 220 is an oblong hole, and this shape can effectively reduce the problem of sharp edges. A top cover 220 with a folded edge is provided on the upper part of the top plate 290 of the electrical box, and there is a space between the top cover 220 and the top plate 290, through which the air from the air outlet hole 260 can flow out. The top cover 220 takes into account both wind guiding and waterproof functions, can meet waterproof requirements, and double the air output. It has been verified by tests that the temperature of the components in the electrical box that mainly rely on convection heat dissipation has dropped by 2 to 3 °C.

The structure of an electrical box according to a specific embodiment of the present disclosure will be described in detail below with reference to FIGS. 1 to 7 .

As shown in FIG. 1 , in this embodiment, the outdoor unit of the air conditioner includes a housing 100 and an electrical box 200 . The air outlet of the housing 100 is located at the top. The direction of the flow field of the whole air conditioner outdoor unit shown in FIG. 1 is from bottom to top. According to this feature, holes are opened on both the bottom plate and the top plate of the electrical box 200, the bottom plate 280 is provided with air inlet holes 270, and the top plate 290 is provided with air outlet holes 260, so that the air duct inside the electrical box 200 is similar to the whole machine, and the lower In and out.

In order to meet the waterproof requirements and the wind direction guiding function, an inclined air guide plate 230 is provided outside the air inlet hole of the bottom plate of the electrical box 200 to guide the direction of the airflow entering the inside of the electrical box after being bent.

As shown in FIG. 2 , the electrical box 200 has a compact structure, and is generally provided with two cavities in the left and right directions to form layers in the thickness direction.

A plurality of air inlet holes 270 are provided on the bottom plate of the electrical box. There are various embodiments for the arrangement of the air inlet holes. In one embodiment, a plurality of air inlet holes 270 are provided on both sides of the partition plate 240 , and the number of air inlet holes 270 in the first cavity 211 is greater than the number of air inlet holes 270 in the second cavity 212 .

In this regard, the layout of the electrical box is based on the airflow direction inside the electrical box. The fluid entering the electrical box after being guided by the air deflector 230 has a certain angle with the horizontal direction. As shown in FIG. 6 , the partition 240 inside the electrical box divides it into two airflows, and the flow rate of the first cavity 211 is relatively large. . Therefore, the drive board of the press with larger heat generation should be arranged in the first cavity 211, and the main board such as the main control board should be arranged in the second cavity 212 to improve the heat dissipation capability.

In another embodiment, the plurality of air inlet holes 270 are arranged in the first cavity 211 of the electrical box 200 and are arranged close to the partition plate 240 . The plurality of air inlet holes 270 are uniformly distributed small round holes, which can disperse the fluid entering the electrical box to form a small eddy current flowing upward, and enhance the convective heat transfer efficiency.

In this regard, the electrical box is laid out according to the airflow direction inside the electrical box. Since all the air inlet holes are opened in the first cavity 211, vertical air ducts are formed between the air outlet holes and the top plate. In addition, the flow rate of the air fluid in the first cavity 211 is relatively large, and the pressure is relatively small, so that a lateral pressure difference is formed between the first cavity 211 and the second cavity 212 inside the electrical box, and the air fluid passes through the ventilation gap on the partition 240. The first cavity 211 flows into the second cavity 212, and then flows out along the fixed wall surface to form a three-dimensional air duct to enhance the heat dissipation performance.

For the location layout of the main control board, as shown in FIG. 7 , the reactor 300 is arranged inside the electrical box close to the air inlet hole. The shape of the reactor 300 is a blunt body, the resistance is large, and the two reactors 300 are parallel. Placing can gather the air fluid scattered by the air inlet hole in the middle. Taking the left reactor as an example, the gathered air fluid flows upward and toward the center on the right side wall of the reactor, and then diverts the wind to the finned radiator 600. , the electrical box flows out from the air outlet at the top, and on the left side of the reactor, due to the existence of the windward angle, the air fluid is guided to the electrolytic capacitor 500 of the driving board 400. The electrolytic capacitors 500 should be arranged vertically as shown in the figure. The bluff body area can be reduced to avoid large eddy currents, so that the air fluid can flow out of the electrical box smoothly upwards, improving the performance of the air-cooled radiator.

Distribute the fluid flow between the two chambers of the electrical box according to the distance between the air inlet hole and the left panel of the electrical box. Layout the components that generate more heat in the direct blowing position of the first cavity. In addition, the distance between the components with large heat generation and the bottom plate of the electrical box and the distance between the air inlet hole and the left panel of the electrical box must satisfy the trigonometric function relationship. Specifically, assuming that the distance between the air inlet hole and the left panel of the electrical box is d, and the angle between the speed direction of the airflow entering the electrical box from the air inlet hole and the horizontal direction is A, then the components with larger heat generation The distance L=d*tanA from the bottom plate of the electrical box.

To sum up, the electrical box of the embodiment of the present disclosure is provided with an inclined air guide plate on the lower side of the bottom plate to guide the direction of the small eddy flow of fluid that is scattered through the air inlet hole and enters the electrical box, thereby improving the heat dissipation efficiency. Moreover, by opening up and down holes in the electrical box, and using the air deflector to guide the in and out directions of the air and fluid, and at the same time with the flow field of the whole machine, a complete three-dimensional through air duct is formed, and the fluid flow path is complete, which can effectively prevent dust accumulation.

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 them; although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand: The disclosed specific embodiments are modified or some technical features are equivalently replaced; without departing from the spirit of the technical solutions of the present disclosure, all of them should be included in the scope of the technical solutions claimed in the present disclosure.

Claims (11)

An electrical box comprising: The electrical box main body (210) includes a bottom plate (280) and a top plate (290), the bottom plate (280) is provided with a plurality of air inlet holes (270), and the top plate (290) is provided with air outlet holes (260). );and The air guide plate (230) is obliquely arranged on the lower side of the bottom plate (280), and the projection of the air guide plate (230) on the bottom plate (280) covers at least part of the air inlet hole (270). The electrical box according to claim 1, further comprising a partition plate (240), the partition plate (240) is arranged in the inner cavity of the electrical box main body (210), and the inner cavity is placed in the inner cavity of the electric box body (210). It is divided into a first cavity (211) and a second cavity (212) in the thickness direction, and ventilation holes (241) are provided on the partition plate (240). The electrical box according to claim 2, wherein, among the plurality of air inlet holes (270), the number of air inlet holes (270) located in the first cavity (211) is greater than that in the second cavity (270). 212) the number of air inlet holes (270). The electrical box according to claim 3, further comprising at least two components arranged in the electrical box main body (210), the at least two components comprising a first component (310) and a A second component (320), the calorific value of the first component (310) is greater than the calorific value of the second component (320), and the first component (310) is arranged in the first cavity (211), the second component (320) is arranged in the second cavity (212). The electrical box according to claim 4, wherein the first component (310) comprises a compressor drive board, and the second component (320) comprises a main control board. The electrical box according to claim 2, wherein the plurality of air inlet holes (270) are all located in the first cavity (211). The electrical box according to claim 6, wherein the plurality of air inlet holes (270) are arranged close to the partition plate (240). The electrical box according to any one of claims 1 to 7, wherein the top plate (290) is inclined relative to the bottom plate (280). The electrical box according to claim 8, wherein the included angle between the top plate (290) and the bottom plate (280) ranges from 15° to 30°. The electrical box according to any one of claims 1 to 9, wherein the air outlet hole (260) is an oblong hole. An air conditioner outdoor unit, comprising a casing (100) and an electrical box (200) according to any one of claims 1 to 10, an air outlet is provided at the top of the casing (100), and the electrical box (200) is installed in the housing (100).

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