Electric control box and air conditioner with same

Abstract

The electric control box comprises a box body and a circuit board, a containing cavity is formed in the box body, and the circuit board is arranged in the containing cavity and arranged on a top plate of the box body in an inverted mode. The box body comprises an inner shell and an outer shell, a bottom plate of the inner shell is provided with a downward concave part, at least one side part of the downward concave part is a ventilation part, the ventilation part defines a first air passing channel, and the upper end of the first air passing channel is communicated with the containing cavity. The outer shell is arranged outside the inner shell in a covering mode and comprises a ventilation side wall facing the ventilation part, the ventilation side wall and the ventilation part are spaced to form a second air passing channel, a first ventilation hole communicated with the second air passing channel is formed in the ventilation side wall, and an overflowing opening communicated with the second air passing channel and the first air passing channel is formed in the lower end of the ventilation part. By arranging the first air passing channel and the second air passing channel which are staggered and connected end to end, the situation that water drops enter the containing cavity is reduced, the risk of water inflow short circuit of the circuit board is reduced, and the working reliability of the electric control box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control components, in particular to an electric control box and an air conditioner having the same. Background Art

[0002] The electric control box is usually installed outside the outdoor unit, and has poor waterproof effect. Rainwater or condensation water can easily enter the electric control box with the rotation of the fan, causing water to enter the electronic components inside the electric control box, which has the risk of causing short circuit damage to the electrical components inside the electric control box, affecting the normal use of the electric control box. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an electric control box that can dissipate heat and is waterproof, thereby reducing the risk of short circuits caused by water ingress to the circuit board and improving the working reliability of the electric control box.

[0004] The utility model also provides an air conditioner with the electric control box.

[0005] According to the first aspect of the utility model, the electric control box comprises: a box body and a circuit board, a accommodating cavity is formed in the box body, the circuit board is arranged in the accommodating cavity and is inverted on the top plate of the box body, the box body comprises: an inner shell, the bottom plate of the inner shell has a recessed portion, at least one side portion of the recessed portion is a ventilation portion, the ventilation portion defines a first air passage, and the upper end of the first air passage is connected to the accommodating cavity; an outer shell, the outer shell cover is arranged outside the inner shell, and comprises a ventilation side wall arranged facing the ventilation portion, the ventilation side wall is spaced apart from the ventilation portion to form a second air passage between the ventilation side wall and the ventilation portion, a first ventilation hole connected to the second air passage is formed on the ventilation side wall, and a flow port connecting the second air passage with the first air passage is formed at the lower end of the ventilation portion.

[0006] According to the electric control box of the embodiment of the utility model, by arranging the first air passage and the second air passage which are staggered and connected end to end between the inner shell and the outer shell, the airflow first flows downward along the second air passage, and then flows upward along the first air passage to the accommodating cavity, and the liquid droplets in the airflow will be blocked by the ventilation part and remain in the second air passage or the first air passage under the action of gravity, which can not only dissipate heat for the circuit board but also reduce the occurrence of water droplets entering the accommodating cavity, thereby reducing the risk of short circuit of the circuit board due to water intrusion, and improving the working reliability of the electric control box.

[0007] In some embodiments, the first ventilation hole is higher than the flow opening; and / or, there are multiple first ventilation holes and the aperture of each of the first ventilation holes is smaller than the height of the flow opening in the up and down directions.

[0008] In some embodiments, the flow port is formed as a long strip opening extending along the length direction of the ventilation portion, and the first air passage is formed as a long strip channel extending along the length direction of the ventilation portion. The first air passage is provided with supporting ribs supported between the two side walls of the width of the first air passage.

[0009] In some embodiments, in the spacing direction between the ventilation side wall and the ventilation portion, the width W1 of the second air passage is smaller than the width W2 of the first air passage.

[0010] In some embodiments, the side portion of the recessed portion includes a first side portion and a third side portion that extend in different directions and are adjacent to each other, the ventilation portion includes the first side portion and the third side portion, and the ventilation side wall includes a first side wall that is disposed facing the first side portion, and a third side wall that is disposed facing the third side portion.

[0011] In some embodiments, the side of the recessed portion includes a first side, the ventilation portion includes the first side, a second ventilation hole is formed on one side of the box body that is spaced apart from and opposite to the first side along a first direction, and the second ventilation hole is connected to the accommodating cavity.

[0012] In some embodiments, the inner shell includes a second side portion spaced apart from and opposite to the first side portion along the first direction, the second ventilation hole is formed on the second side portion, and a avoidance opening is formed on the wall surface of the outer shell corresponding to the second side portion, and the second ventilation hole is arranged corresponding to the avoidance opening.

[0013] In some embodiments, the electric control box further includes: a radiator, which is disposed on the circuit board and includes a heat dissipation portion located outside the box body, and the heat dissipation portion is disposed on a side of the second ventilation hole away from the first ventilation hole.

[0014] In some embodiments, a guide rib extending toward the heat dissipation portion is provided on the second side portion, and the guide rib passes through the avoidance opening and is located at the second ventilation hole.

[0015] In some embodiments, the guide rib extends obliquely downward from the second ventilation hole to the heat dissipation portion; and / or, the guide rib is multiple and arranged at intervals in the up and down directions.

[0016] In some embodiments, the heat dissipation portion includes a plurality of fins arranged at intervals, a heat dissipation gap is formed between adjacent fins, the heat dissipation gap is open toward the second side portion, and the end of the guide rib extends to abut or gap fit with the heat dissipation portion.

[0017] In some embodiments, the second ventilation hole is higher than an upper end of the first air passage.

[0018] In some embodiments, the outer shell is a sheet metal part, and the inner shell is a plastic part.

[0019] An air conditioner according to the second aspect of the utility model comprises a fan component and an electric control box according to the first aspect of the utility model, wherein the electric control box is arranged in a wind field formed by the fan component.

[0020] According to the air conditioner of the present invention, by providing the electric control box of the first aspect, the heat dissipation efficiency of the electric control box is higher, thereby improving the operating stability of the air conditioner.

[0021] In some embodiments, the fan component includes an axial flow wind wheel with a horizontally arranged axis, the electrical control box is arranged above the axial flow wind wheel, an airflow flowing from the first side to the second side in a first direction is formed above the axial flow wind wheel, and the electrical control box is provided with the first ventilation hole on one side of the first direction close to the first side.

[0022] In some embodiments, the air conditioner includes an outdoor unit part suitable for being installed outdoors and an indoor unit part suitable for being installed indoors, and the electric control box is installed in the outdoor unit part.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of an electric control box according to an embodiment of the utility model;

[0025] Figure 2 is a cross-sectional view of a box body of an electric control box according to an embodiment of the utility model;

[0026] Figure 3 is based on Figure 2 A partial enlarged view of area A of the example shown;

[0027] Figure 4 is another cross-sectional view of the box body of the electric control box according to one embodiment of the utility model;

[0028] Figure 5 is a cross-sectional view of a box body of an electric control box according to an embodiment of the utility model;

[0029] Figure 6 is another cross-sectional view of an electric control box according to an embodiment of the utility model;

[0030] Figure 7It is a structural diagram of an electric control box according to an embodiment of the utility model;

[0031] Figure 8 It is a structural schematic diagram of an axial flow wind wheel and an electric control box according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] Electric control box 1000;

[0034] Box body 100; accommodating chamber 101;

[0035] Inner shell 1; concave portion 1a; ventilation portion 11; first plate portion 111; second plate portion 112; first side portion 11a; third side portion 11b; first air passage 12; flow port 13; support rib 14; second side portion 15; second ventilation hole 16; guide rib 17; third plate portion 18;

[0036] Shell 2; ventilation side wall 21; first side wall 21a; third side wall 21b; second air passage 22; first ventilation hole 23; avoidance opening 24;

[0037] Top plate 3;

[0038] Circuit board 400;

[0039] Heat dissipation part 500; fin 5;

[0040] Fan component 2000; axial flow wind wheel 600;

[0041] A first direction X; a direction X1 from the first side to the second side in the first direction. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0044] The electric control box 1000 according to the first aspect of the present invention will be described below with reference to the accompanying drawings.

[0045] According to some embodiments of the present invention, the electric control box 1000 is as follows: Figure 1 As shown, it comprises: a box body 100 and a circuit board 400 . A receiving cavity 101 is formed in the box body 100 . The circuit board 400 is arranged in the receiving cavity 101 and is inverted on the top plate 3 of the box body 100 .

[0046] The box body 100 includes: a top plate 3, an inner shell 1 and an outer shell 2, the top plate 3 is located above the inner shell 1 and the outer shell 2, and the outer shell 2 is covered outside the inner shell 1. The box body 100 supports the internal circuit board 400 for installation and protects the circuit board 400 in the accommodating cavity 101. The airflow flows through the accommodating cavity 101 to dissipate heat from the internal circuit board 400 and other heating components, thereby improving the working reliability of the electric control box 1000. The top plate 3 is used to support the installation of the circuit board 400, and the inner shell 1 and the outer shell 2 are provided with airflow channels for the heat dissipation airflow to flow.

[0047] like Figure 2 As shown, the bottom plate of the inner shell 1 has a concave portion 1a, the cross-sectional area of ​​the concave portion 1a is smaller than the cross-sectional area of ​​the upper portion of the inner shell 1, and the concave portion 1a has multiple side portions. At least one side portion of the concave portion 1a is a ventilation portion 11, and the ventilation portion 11 defines a first air passage 12, and the upper end of the first air passage 12 is connected to the accommodating cavity 101.

[0048] The outer shell 2 is disposed outside the inner shell 1 and includes a ventilation side wall 21 disposed facing the ventilation portion 11. The ventilation side wall 21 is spaced apart from the ventilation portion 11 to form a second air passage 22 between the ventilation side wall 21 and the ventilation portion 11. A first ventilation hole 23 communicating with the second air passage 22 is formed on the ventilation side wall 21, and a flow port 13 communicating with the second air passage 22 and the first air passage 12 is formed at the lower end of the ventilation portion 11.

[0049] It is worth noting that the above up and down directions are based on Figure 1 and Figure 2 The orientation of the electric control box 1000 in normal operation is used as a reference system. The inside-outside direction is based on the orientation of the electric control box 1000 as a reference direction. The direction close to the accommodating cavity 101 of the electric control box 1000 is the inside direction, and the direction away from the accommodating cavity 101 of the electric control box 1000 is the outside direction.

[0050] The upper end of the ventilation part 11 is open and connected to the accommodating cavity 101, and the lower end of the ventilation part 11 is also open and connected to the second air passage 22, so as to connect the inside and outside of the electric control box 1000, so that the air flow outside the electric control box 1000 flows into the accommodating cavity 101 to accelerate the heat dissipation of the circuit board 400.

[0051] The ventilation side wall 21 and the ventilation part 11 are arranged in a one-to-one correspondence. Optionally, one side of the lower concave part 1a is the ventilation part 11, and the housing 2 has a ventilation side wall 21 arranged facing the ventilation part 11, and a second air passage 22 communicating with the outside of the electric control box 1000 is formed between the ventilation side wall 21 and the ventilation part 11. Alternatively, more than one side of the lower concave part 1a is the ventilation part 11, and the housing 2 has a plurality of ventilation side walls 21 to form a second air passage 22 between the ventilation side wall 21 and the ventilation part 11. By providing a plurality of second air passages 22, the air flow rate flowing into the electric control box 1000 can be increased, and the heat dissipation efficiency of the electric control box 1000 can be improved.

[0052] like Figure 2 and Figure 3 As shown, the ventilation portion 11 and the ventilation side wall 21 both extend in the up-down direction, and the first air passage 12 defined by the ventilation portion 11 and the second air passage 22 defined between the ventilation side wall 21 and the ventilation portion 11 both extend in the up-down direction.

[0053] The air outside the electric control box 1000 first flows into the second air passage 22 through the first ventilation hole 23, and then flows downward along the second air passage 22 formed between the outer shell 2 and the inner shell 1; then, the airflow flows into the first air passage 12 through the flow port 13 at the lower end of the ventilation part 11; finally, the airflow flows upward along the first air passage 12 defined by the ventilation part 11, and flows into the accommodating cavity 101 to accelerate the heat dissipation of the circuit board 400.

[0054] By forming a first ventilation hole 23 for air flow on the ventilation side wall 21, compared with directly opening the outer shell, the first ventilation hole 23 can filter out large particles of impurities, reduce the entry of water droplets, dust or insects into the electric control box 1000, and improve the cleanliness of the airflow entering the electric control box 1000.

[0055] By providing the first air passage 12 and the second air passage 22 which are staggered and connected end to end, the airflow flowing into the electric control box 1000 can be further filtered. After the airflow and the liquid droplets simultaneously flow into the second air passage 22 through the first ventilation hole 23, the airflow first flows downward along the second air passage 22, and then flows upward along the first air passage 12 to the accommodating cavity 101, while the liquid droplets will remain in the second air passage 22 or in the first air passage 12 under the action of gravity.

[0056] The circuit board 400 inside the electric control box 1000 of the embodiment of the utility model is cooled by air cooling, and no glue filling is performed. By adopting a labyrinth structure in the box body 100, a design that only air is allowed to enter but no water can enter can be realized, which further reduces the occurrence of liquid flowing into the accommodating cavity 101, reduces the risk of short circuit caused by water ingress of the circuit board 400, and improves the working reliability of the electric control box 1000. The electric control box 1000 can be waterproof in rain, and the circuit board 400 and heating elements in the electric control box 1000 can be cooled, so that the electric control box 1000 can be cooled by airflow in a natural environment and can be waterproof at the same time.

[0057] The liquid filtered in the first air passage 12 and the second air passage 22 will also be discharged from the electric control box 1000, reducing the impact on the structural strength of the box body 100, and will not affect the airflow in the first air passage 12 and the second air passage 22. For example, the liquid in the first air passage 12 or the second air passage 22 can flow out of the electric control box 1000 from the gap between the inner shell 1 and the outer shell 2.

[0058] Furthermore, even if liquid flows into the accommodating chamber 101 , it will gather at the bottom of the box body 100 under the action of gravity. By mounting the circuit board 400 upside down on the top plate 3 of the box body 100 , the risk of water ingress and short circuit of the circuit board 400 can be further reduced.

[0059] According to the electric control box 1000 of the embodiment of the utility model, by arranging the first air passage 12 and the second air passage 22 which are staggered and connected end to end between the inner shell 1 and the outer shell 2, the airflow first flows downward along the second air passage 22, and then flows upward along the first air passage 12 to the accommodating cavity 101, and the liquid droplets mixed in the airflow will be blocked by the ventilation part 11 and remain in the second air passage 22 or the first air passage 12 under the action of gravity, which can dissipate heat for the circuit board 400 and reduce the occurrence of water droplets entering the accommodating cavity 101, thereby reducing the risk of water ingress and short circuit of the circuit board 400 and improving the working reliability of the electric control box 1000.

[0060] In some embodiments of the present invention, Figure 3 As shown, the ventilation portion 11 includes a first plate portion 111 and a second plate portion 112 extending in the up-down direction, and the first plate portion 111 and the second plate portion 112 are spaced apart to form a first air passage 12. The second plate portion 112 is located outside the first plate portion 111, and a second air passage 22 is formed between the ventilation side wall 21 and the second plate portion 112, and the lower end of the second plate portion 112 is spaced apart from the housing 2 to form a flow port 13.

[0061] like Figure 3As shown, the inner shell 1 also includes a third plate portion 18 extending inward, and the third plate portion 18 is connected to the upper end of the second plate portion 112 to isolate the upper end of the second air passage 22 from the accommodating cavity 101 to prevent the airflow flowing in from the first ventilation hole 23 from directly flowing into the accommodating cavity 101.

[0062] In some embodiments of the present invention, Figure 2 As shown, the first ventilation hole 23 is higher than the flow opening 13 .

[0063] By setting the first ventilation hole 23 higher than the flow port 13, the droplets entering the second air passage 22 through the first ventilation hole 23 will be blocked by the ventilation portion 11, which can reduce the possibility of droplets directly rushing into the accommodating cavity 101, reduce the risk of water intrusion and short circuit of the circuit board 400, and improve the working reliability of the electrical control box 1000.

[0064] In some embodiments of the present invention, Figure 2 As shown, there are a plurality of first ventilation holes 23 and the aperture of each first ventilation hole 23 is smaller than the height of the flow opening 13 in the up-down direction.

[0065] By providing a plurality of first ventilation holes 23, the amount of air entering the electric control box 1000 can be increased, and the heat dissipation speed of the circuit board 400 can be improved. By designing the aperture of the first ventilation hole 23 to be smaller than the height of the flow port 13 in the vertical direction, large particles of impurities can be filtered out, and large particles or insects are prevented from entering the second air passage 22 to block the flow port 13, and the air flow between the first air passage 12 and the second air passage 22 is improved, the air flow effect is good, and the heat dissipation reliability of the electric control box 1000 is improved.

[0066] In some embodiments of the present invention, Figure 4 As shown, the flow opening 13 is formed as a long strip opening extending along the length direction of the ventilation portion 11, the first air passage 12 is formed as a long strip passage extending along the length direction of the ventilation portion 11, and a supporting rib 14 is provided in the first air passage 12 to support the width of the two side walls of the first air passage 12. For example, when the first side portion 11a shown in FIG. 4 is used as the ventilation portion 11, the length direction of the first side portion 11a is the front-to-back direction, and the first air passage 12 defined by the first side portion 11a and the flow opening 13 formed on the first side portion 11a both extend along the front-to-back direction. For example, when the third side portion 11b shown in FIG. 4 is used as the ventilation portion 11, the length direction of the third side portion 11b is the left-right direction, and the first air passage 12 defined by the third side portion 11b and the flow opening 13 formed on the third side portion 11b both extend along the left-right direction.

[0067] The flow openings 13 are opened along the extension direction of the first air passage 12 and are designed to be long strips, which helps the air flow to flow smoothly from the second air passage 22 to the first air passage 12 and improve the ventilation efficiency.

[0068] By providing supporting ribs 14 in the first air passage 12 and supporting between the two side walls of the first air passage 12, the structural stability of the first air passage 12 can be improved, the vibration or deformation of the first air passage 12 caused by air flow can be improved, and the working reliability of the ventilation part 11 can be improved.

[0069] In some embodiments of the utility model, the ventilation portion 11 includes a first plate portion 111 and a second plate portion 112 extending in the up-down direction, the first plate portion 111 and the second plate portion 112 are spaced apart to form a first air passage 12, and the supporting ribs 14 are connected between the first plate portion 111 and the second plate portion 112 to improve the structural strength of the ventilation portion 11 and improve the structural stability of the first air passage 12.

[0070] In some embodiments of the present invention, Figure 5 As shown, in the spacing direction between the ventilation side wall 21 and the ventilation portion 11 , the width W1 of the second air passage 22 is smaller than the width W2 of the first air passage 12 .

[0071] When the airflow flows from the outside of the electric control box 1000 into the accommodating chamber 101, it first passes through the second air passage 22 with a smaller width, and then flows through the first air passage 12 with a wider width. When the airflow flows from the second air passage 22 into the first air passage 12, the airflow velocity slows down, which is conducive to keeping the liquid droplets mixed in the airflow in the second air passage 22 or in the first air passage 12, and reducing the occurrence of liquid flowing into the accommodating chamber 101.

[0072] In some embodiments of the present invention, Figure 4 As shown, the side of the lower recess 1a includes a first side portion 11a and a third side portion 11b which extend in different directions and are adjacent to each other, the ventilation portion 11 includes a first side portion 11a and a third side portion 11b, and the ventilation side wall 21 includes a first side wall 21a arranged facing the first side portion 11a, and a third side wall 21b arranged facing the third side portion 11b.

[0073] By setting both the first side portion 11a and the third side portion 11b as the ventilation portion 11, the outer shell 2 also includes a first side wall 21a facing the first side portion 11a and a third side wall 21b facing the third side portion 11b, thereby increasing the air flow channel flowing into the electric control box 1000, thereby increasing the air flow flowing into the electric control box 1000 and improving the heat dissipation efficiency of the electric control box 1000.

[0074] like Figure 2 and Figure 4As shown, the first side portion 11a is the ventilation portion 11, and the first side portion 11a defines a first wind passage 12, and the upper end of the first wind passage 12 is connected to the accommodating chamber 101. A second wind passage 22 is formed between the first side wall 21a and the first side portion 11a, and a first ventilation hole 23 is formed on the first side wall 21a. A flow port 13 connecting the first wind passage 12 and the second wind passage 22 is formed at the lower end of the first side portion 11a.

[0075] like Figure 6 and Figure 4 As shown, the third side portion 11b is the ventilation portion 11, and the third side portion 11b defines a first air passage 12, and the upper end of the first air passage 12 is connected to the accommodating chamber 101. A second air passage 22 is formed between the third side wall 21b and the third side portion 11b, and a first ventilation hole 23 is formed on the third side wall 21b. A flow port 13 connecting the first air passage 12 and the second air passage 22 is formed at the lower end of the third side portion 11b.

[0076] In some embodiments of the present invention, Figure 4 As shown, the right side of the lower concave portion 1a is the first side portion 11a, the front side of the lower concave portion 1a is the third side portion 11b, the first side portion 11a and the third side portion 11b are adjacently arranged, and the first side portion 11a and the third side portion 11b are both formed as the ventilation portion 11. The right front side wall of the housing 2 is the first side wall 21a, the front side wall of the housing 2 is the third side wall 21b, and the first side wall 21a and the third side wall 21b are adjacently arranged and connected to each other.

[0077] like Figure 4 As shown, the right end of the third side portion 11b is connected to the right side of the lower recess 1a, the first side portion 11a is connected to the third side portion 11b, and the second air passage 22 formed between the first side wall 21a and the first side portion 11a is at least partially connected to the first air passage 12 formed by the third side portion 11b. When the second air passage 22 formed between the third side wall 21b and the third side portion 11b is deformed or blocked, air can be supplied to the first air passage 12 formed by the third side portion 11b through the second air passage 22 formed between the first side wall 21a and the first side portion 11a, so as to maintain a large air volume and dissipate heat from the electric control box 1000 at a high speed.

[0078] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the side of the lower recess 1a includes a first side 11a, the ventilation portion 11 includes a first side 11a, and a second ventilation hole 16 is formed on one side of the box body 100 that is spaced apart from and opposite to the first side 11a along the first direction X. The second ventilation hole 16 is connected to the accommodating cavity 101.

[0079] By providing the second ventilation hole 16 to connect the accommodating cavity 101 and the outside of the electric control box 1000, a complete airflow route is formed from the outside of the electric control box 1000 to the accommodating cavity 101 and then to the outside of the electric control box 1000, thereby enhancing the airflow effect and improving the heat dissipation efficiency of the electric control box 1000.

[0080] The second ventilation hole 16 is provided on the side opposite to the first side portion 11a to increase the airflow path of the airflow through the accommodating cavity 101, so that the heat dissipation airflow can fully exchange heat with the circuit board 400 and the heating element in the accommodating cavity 101, thereby improving the heat dissipation effect.

[0081] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the inner shell 1 includes a second side portion 15 spaced apart from and arranged opposite to the first side portion 11a along the first direction X, a second ventilation hole 16 is formed on the second side portion 15, and a avoidance opening 24 is formed on the wall surface of the outer shell 2 corresponding to the second side portion 15, and the second ventilation hole 16 is arranged corresponding to the avoidance opening 24.

[0082] The shell 2 is wrapped around the second side portion 15, which can improve the structural strength of the box body 100. The wall surface of the shell 2 corresponding to the second side portion 15 is formed with an avoidance opening 24. By setting the avoidance opening 24 to avoid the second ventilation hole 16, it is ensured that the airflow can smoothly flow out of the electric control box 1000 through the second ventilation hole 16, and the airflow is good, which can improve the heat dissipation effect of the electric control box 1000.

[0083] In some embodiments of the present invention, Figure 1 and Figure 7 As shown, the electric control box 1000 further includes: a heat sink, which is disposed on the circuit board 400 and includes a heat dissipation portion 500 located outside the box body 100 , and the heat dissipation portion 500 is disposed on a side of the second ventilation hole 16 away from the first ventilation hole 23 .

[0084] The heat sink is connected to the circuit board 400, and conducts the heat generated by the circuit board 400 to the heat sink, thereby accelerating the heat dissipation of the circuit board 400. At least part of the heat sink is located outside the box body 100, and the heat sink conducts the heat of the circuit board 400 to the outside of the box body 100, thereby increasing the heat dissipation speed of the circuit board 400.

[0085] The heat dissipation part 500 of the radiator located outside the box body 100 is arranged outside the second ventilation hole 16. In the flow direction of the heat dissipation airflow, the radiator is arranged downstream of the circuit board 400. The airflow first flows through the circuit board 400 for heat exchange, and then passes through the radiator to dissipate the heat of the radiator. The flow of an airflow can dissipate the heat of the circuit board 400 for a second time, thereby improving the heat dissipation speed of the circuit board 400.

[0086] In addition, the heat dissipation part 500 of the radiator outside the box body 100 is arranged close to the second ventilation hole 16 and away from the first ventilation hole 23, thereby reducing the situation where the airflow after heat exchange with the radiator directly flows into the first ventilation hole 23, avoiding the heat of the radiator from adversely affecting the heat dissipation of the circuit board 400, and improving the heat dissipation effect of the circuit board 400.

[0087] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, a guide rib 17 extending toward the heat dissipation portion 500 is provided on the second side portion 15 , and the guide rib 17 passes through the avoidance opening 24 and is located at the second ventilation hole 16 .

[0088] The guide ribs 17 are provided to guide the airflow out of the second vents 16 to the heat dissipation part 500 of the radiator. The stable flow of the airflow can improve the heat dissipation efficiency of the radiator. The avoidance opening 24 also avoids the extension of the guide ribs 17 to avoid interference with the guide ribs 17.

[0089] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the guide rib 17 extends obliquely downward from the second ventilation hole 16 to the heat dissipation portion 500 .

[0090] The guide ribs 17 extend obliquely downward to guide the airflow from the second ventilation holes 16 to the heat dissipation portion 500 , and can also make the airflow flow stably by virtue of gravity, thereby improving the heat dissipation efficiency of the radiator.

[0091] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, there are multiple guide ribs 17 which are arranged at intervals in the vertical direction.

[0092] By providing a plurality of guide ribs 17, the guiding effect of the airflow can be improved, and a plurality of air flow paths can be provided, which helps to evenly distribute the airflow, improve the heat dissipation effect of the heat dissipation part 500, and avoid the generation of local hot spots.

[0093] In some embodiments of the present invention, Figure 7 As shown, the heat dissipation portion 500 includes a plurality of fins 5 arranged at intervals, a heat dissipation gap is formed between adjacent fins 5, the heat dissipation gap is open toward the second side portion 15, and the end of the guide rib 17 extends to abut against or gap fit with the heat dissipation portion 500.

[0094] The ventilation direction of the heat dissipation gap is consistent with the direction of the airflow flowing out from the second ventilation hole 16. The airflow flowing out from the second ventilation hole 16 on the second side 15 can directly flow to multiple heat dissipation gaps. The airflow contacts the fins 5 for heat exchange. The contact area between the airflow and the fins 5 is large, which improves the heat dissipation effect.

[0095] Optionally, the end of the guide rib 17 extends to abut against the heat dissipation part 500 , and the guide rib 17 and the heat dissipation component support each other, which can improve the structural reliability of the electric control box 1000 .

[0096] Optionally, the end of the flow rib is extended to fit with the gap of the heat dissipation part 500, which can improve the turbulence caused by the airflow directly impacting the heat dissipation part 500, improve the flow effect of the airflow, and improve the heat dissipation effect of the radiator.

[0097] In some embodiments of the present invention, the end of the guide member and the heat dissipation component of the heat sink are matched with a clearance of less than or equal to 2 mm.

[0098] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the second ventilation hole 16 is higher than the upper end of the first air passage 12 .

[0099] The circuit board 400 is mounted on the top plate 3 at the top of the box body 100, so the second ventilation hole 16 is set higher than the upper end of the first air passage 12, and the second ventilation hole 16 is closer to the circuit board 400 than the upper end of the first air passage 12. By setting the second ventilation hole 16 higher than the upper end of the first air passage 12, it is possible to reduce the situation where the airflow flows into the accommodating cavity 101 from the first air passage 12 and then flows out directly from the second ventilation hole 16 without exchanging heat with the circuit board 400. The airflow flowing into the accommodating cavity 101 is guided to flow upward, and the airflow flows out from the second ventilation hole 16 after fully exchanging heat with the circuit board 400, which can improve the heat dissipation effect of the circuit board 400.

[0100] In some embodiments of the present invention, the outer shell 2 is a sheet metal part, and the inner shell 1 is a plastic part.

[0101] The outer sheet metal can have a fireproof effect, improve the safety of the electric control box 1000, and the sheet metal can protect the inner shell 1 located inside, delay the aging of the plastic parts, and extend the service life of the electric control box 1000.

[0102] Plastic parts are lighter than sheet metal parts, which is beneficial to reducing the weight of the electric control box 1000 and can save manufacturing costs.

[0103] The following describes an air conditioner according to an embodiment of the second aspect of the utility model.

[0104] The air conditioner according to the embodiment of the utility model comprises a fan component 2000 and an electric control box 1000 . The electric control box 1000 is the electric control box 1000 of the embodiment of the first aspect of the utility model. The electric control box 1000 is arranged in the wind field formed by the fan component 2000 .

[0105] The fan component 2000 is used to generate flowing airflow. By arranging the electrical control box 1000 in the wind field formed by the fan component 2000, the fan component 2000 blows the airflow into the electrical control box 1000, thereby increasing the airflow speed and the airflow volume, thereby improving the heat dissipation efficiency of the electrical control box 1000.

[0106] According to the air conditioner of the embodiment of the present invention, by providing the electric control box 1000 of the first aspect of the present invention, the heat dissipation efficiency of the electric control box 1000 is higher, thereby improving the operation stability of the air conditioner.

[0107] In some embodiments of the present invention, Figure 8 As shown, the fan component 2000 includes an axial flow wind wheel 600 with a horizontally arranged axis, and the electrical control box 1000 is arranged above the axial flow wind wheel 600. An airflow flowing in a first direction from the first side to the second side in a direction X1 is formed above the axial flow wind wheel 600. The electrical control box 1000 is provided with a first ventilation hole 23 on one side close to the first side in the first direction X.

[0108] Under the action of the positive pressure and negative pressure created by the axial flow wind wheel 600, the airflow above the axial flow wind wheel 600 flows in the direction X1 from the first side to the second side in the first direction, and the airflow flows into the electrical control box 1000 from the first ventilation hole 23, and flows along the maze formed by the second air passage 22 and the first air passage 12.

[0109] The arrangement of the electric control box 1000 and the axial flow fan 600 is conducive to increasing the air flow velocity and air volume flowing into the electric control box 1000, optimizing the air flow management inside the entire air conditioner, ensuring the uniformity and efficiency of air flow, and improving the heat dissipation efficiency of the electric control box 1000.

[0110] In addition, the electric control box 1000 is arranged above the axial flow wind wheel 600, the airflow flows upward, and the first air passage 12 formed by the ventilation part 11 extends from bottom to top. The ventilation part 11 can guide the airflow, reduce the resistance of the flow field, and improve the heat dissipation efficiency of the electric control box 1000.

[0111] The blowing of the axial flow wind wheel 600 can also accelerate the droplets stored in the first air passage 12 or the second air passage 22 to flow out from the gap between the inner shell 1 and the outer shell 2, thereby improving the working stability of the electric control box 1000.

[0112] In some embodiments of the present invention, the air conditioner includes an outdoor unit part suitable for being installed outdoors and an indoor unit part suitable for being installed indoors, and the electric control box 1000 is installed in the outdoor unit part.

[0113] The indoor unit is used to adjust the indoor temperature, while the outdoor unit is set outdoors. The refrigerant circulates between the indoor unit and the outdoor unit, and the electric control box 1000 is set in the outdoor unit. The box body 100 of the electric control box 1000 adopts a labyrinth structure to achieve a design that only allows air in but not water in. The electric control box 1000 can be waterproof in the rain, and can dissipate heat for the circuit board 400 and the heating element in the electric control box 1000, so that the electric control box 1000 can dissipate heat through airflow in the natural environment and can also be waterproof at the same time, reducing the risk of short circuit caused by water ingress to the circuit board 400 and improving the working reliability of the electric control box 1000.

[0114] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 a limitation on the present invention.

[0115] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0116] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0117] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0118] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0119] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric control box, characterized in that: include: A box body and a circuit board, wherein a receiving cavity is formed in the box body, the circuit board is arranged in the receiving cavity and is inverted on the top plate of the box body, and the box body comprises: An inner shell, wherein the bottom plate of the inner shell has a concave portion, at least one side portion of the concave portion is a ventilation portion, the ventilation portion defines a first air passage, and an upper end of the first air passage is communicated with the accommodating cavity; An outer shell, wherein the outer shell cover is arranged outside the inner shell and includes a ventilation side wall arranged facing the ventilation part, the ventilation side wall is spaced apart from the ventilation part to form a second air passage between the ventilation side wall and the ventilation part, a first ventilation hole connected to the second air passage is formed on the ventilation side wall, and a flow port connecting the second air passage and the first air passage is formed at the lower end of the ventilation part.

2. The electric control box according to claim 1, characterized in that: The first ventilation hole is higher than the flow opening; and / or, there are a plurality of first ventilation holes and the aperture of each of the first ventilation holes is smaller than the height of the flow opening in the up-down direction.

3. The electric control box according to claim 1, characterized in that: The flow port is formed as a long strip opening extending along the length direction of the ventilation part, and the first air passage is formed as a long strip passage extending along the length direction of the ventilation part. The first air passage is provided with supporting ribs supported between the width side walls of the first air passage.

4. The electric control box according to claim 1, characterized in that: In a spacing direction between the ventilation side wall and the ventilation portion, a width W1 of the second air passage is smaller than a width W2 of the first air passage.

5. The electric control box according to claim 4, characterized in that: The side portion of the lower recess includes a first side portion and a third side portion which extend in different directions and are adjacent to each other, the ventilation portion includes the first side portion and the third side portion, and the ventilation side wall includes a first side wall which is arranged facing the first side portion, and a third side wall which is arranged facing the third side portion.

6. The electric control box according to claim 1, characterized in that: The side of the lower recess includes a first side, the ventilation portion includes the first side, and a second ventilation hole is formed on one side of the box body that is spaced apart from and opposite to the first side along a first direction, and the second ventilation hole is communicated with the accommodating cavity.

7. The electric control box according to claim 6, characterized in that: The inner shell includes a second side portion spaced apart from and opposite to the first side portion along the first direction, the second ventilation hole is formed on the second side portion, a avoidance opening is formed on the wall surface of the outer shell corresponding to the second side portion, and the second ventilation hole is arranged corresponding to the avoidance opening.

8. The electric control box according to claim 7, characterized in that: Also includes: A heat sink is arranged on the circuit board and comprises a heat dissipation portion located outside the box body, wherein the heat dissipation portion is arranged on a side of the second ventilation hole away from the first ventilation hole.

9. The electric control box according to claim 8, characterized in that: The second side portion is provided with a guide rib extending toward the heat dissipation portion, and the guide rib passes through the avoidance opening and is located at the second ventilation hole.

10. The electric control box according to claim 9, characterized in that: The guide rib extends obliquely downward from the second ventilation hole to the heat dissipation portion; and / or, the guide rib is multiple and arranged at intervals in the up-down direction.

11. The electric control box according to claim 9, characterized in that: The heat dissipation part includes a plurality of fins arranged at intervals, a heat dissipation gap is formed between adjacent fins, the heat dissipation gap is open toward the second side portion, and the end of the guide rib extends to abut against or gap-fit ​​with the heat dissipation part.

12. The electric control box according to claim 6, characterized in that: The second ventilation hole is higher than an upper end of the first air passage.

13. The electric control box according to any one of claims 1 to 12, characterized in that: The outer shell is a sheet metal part, and the inner shell is a plastic part.

14. An air conditioner, characterized in that: It comprises a fan component and an electric control box according to any one of claims 1 to 12, wherein the electric control box is arranged in a wind field formed by the fan component.

15. The air conditioner according to claim 14, characterized in that: The fan component includes an axial flow wind wheel with a horizontal axis, and the electrical control box is arranged above the axial flow wind wheel. An airflow flowing from a first side to a second side in a first direction is formed above the axial flow wind wheel. The electrical control box is provided with the first ventilation hole on a side close to the first side in the first direction.

16. The air conditioner according to claim 15, characterized in that: The air conditioner comprises an external unit part suitable for being arranged outdoors and an internal unit part suitable for being arranged indoors, and the electric control box is arranged at the external unit part.

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