Electric appliance box heat dissipation structure and air conditioner outdoor unit

Abstract

The utility model provides an electric appliance box heat dissipation structure and an air conditioner outdoor unit. The electric appliance box heat dissipation structure comprises an electric appliance box body, a handle and a switching air channel. The electric appliance box body is arranged in the shell, the handle is installed on the shell, the air inlet end of the switching air channel is connected with the handle, and the air outlet end of the switching air channel is connected with the electric appliance box body; an air inlet is formed in the handle and used for communicating the switching air channel with the outside, and first heat dissipation holes are formed in the electric appliance box. According to the utility model, the handle facilitates the carrying of the shell, the handle is also provided with the air inlet hole, so that external air can flow into the shell, and the air flowing into the handle can be guided into the electric appliance box body by arranging the switching air channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and in particular relates to an electrical box heat dissipation structure and an air conditioner outdoor unit. Background Art

[0002] When the air conditioner outdoor unit is running, the electrical components in the electrical box will generate heat. In order to ensure that the components can continue to work normally for a long time, a heat dissipation structure is usually set on the electrical box. The existing technology usually adopts the following methods to design the heat dissipation structure of the electrical box: designing a heat dissipation window on the electrical box alone, mainly dissipating heat through natural convection; designing a heat dissipation window on the electrical box, and at the same time designing a ventilation window on the middle partition of the whole machine, and the assembly gap between the heat dissipation window of the electrical box and the partition and the outer shell of the fuselage in the area where the electrical box is located forms a convection heat dissipation air duct under the action of the negative pressure formed in the fan blade rotation area; designing a heat dissipation window on the electrical box, and at the same time designing a ventilation window on the middle partition of the whole machine, and further designing a ventilation window on the outer shell of the whole machine, and the heat dissipation window of the electrical box and the partition and the outer shell of the fuselage in the area where the electrical box is located form a convection heat dissipation air duct under the action of the negative pressure formed in the fan blade rotation area.

[0003] The prior art discloses designing a heat dissipation window on the electrical box alone, which mainly uses natural convection heat dissipation and has poor heat dissipation effect; designing a heat dissipation window on the electrical box and the partition can form a convection air duct, but the heat dissipation airflow can only be forced to inhale air from the unstable assembly gap of the body shell, resulting in poor heat dissipation effect. Utility Model Content

[0004] The utility model provides an electrical box heat dissipation structure and an air conditioner outdoor unit, which can solve the technical problem that the heat dissipation airflow of the existing heat dissipation structure can only be forcibly sucked from the unstable assembly gap of the fuselage shell, resulting in poor heat dissipation effect.

[0005] The utility model provides a heat dissipation structure of an electrical appliance box, which comprises an electrical appliance box body, a handle and a transfer air duct;

[0006] The electrical box body is arranged in the housing, the handle is mounted on the housing, the air inlet end of the transfer air duct is connected to the handle, and the air outlet end of the transfer air duct is connected to the electrical box body;

[0007] The handle is provided with an air inlet hole, and the air inlet hole is used to connect the switching air duct with the outside world. The electrical box is provided with a first heat dissipation hole, and the first heat dissipation hole is connected with the switching air duct.

[0008] In some embodiments, a mounting hole is provided on the shell, the handle is installed in the mounting hole, and the handle is embedded in the cavity of the shell.

[0009] In some embodiments, the handle includes an opening portion and a channel portion, the opening portion is installed in the mounting hole, the channel portion is arranged in the shell, one end of the opening portion is connected to the outside world, one end of the opening portion extends into the shell and is connected to the channel portion, and the air inlet is arranged on the channel portion.

[0010] In some embodiments, the air inlet holes are provided on a side wall of the channel portion, and a plurality of the air inlet holes are evenly distributed on at least one side wall of the channel portion.

[0011] In some embodiments, the air inlet has an inclination angle, and with the longitudinal section of the channel portion as the projection plane, there is an angle between the centerline axis of the air inlet and the inner wall of the channel portion, and the angle is 15° to 45°. The aperture of the air inlet is 2mm to 4mm.

[0012] In some embodiments, the channel portion is in a box structure, and the bottom side of the channel portion has an opening, and the opening is connected to the opening portion; the channel portion includes a first side panel and a second side panel arranged opposite to each other, the first side panel is connected to the inner wall of the outer shell, and the second side panel is connected to the air inlet end of the transfer air duct, and the air inlet hole is arranged on the second side panel.

[0013] In some embodiments, the transition air duct has a gradually expanding structure, and the cross-sectional area of ​​the air inlet end of the transition air duct is smaller than the cross-sectional area of ​​the air outlet end of the transition air duct.

[0014] In some embodiments, a partition is provided in the outer shell, which divides the outer shell into a first chamber and a second chamber. The electrical box body is provided in the first chamber, and a fan is provided in the second chamber. A second heat dissipation hole is provided on the partition, and the second heat dissipation hole is connected to the inner cavity of the electrical box body to form an air inlet channel between the air inlet hole, the transfer air duct, the first heat dissipation hole and the second heat dissipation hole.

[0015] An air conditioner outdoor unit includes an electrical box heat dissipation structure, wherein the electrical box heat dissipation structure is the above-mentioned electrical box heat dissipation structure.

[0016] In some embodiments, a compressor is provided at the bottom of the housing, and the installation height of the handle is higher than the compressor.

[0017] The utility model provides an electrical box heat dissipation structure and an air conditioner outdoor unit, which have the following beneficial effects:

[0018] Compared to only setting a handle on the outer shell, the handle in the present invention is not only convenient for carrying the outer shell, but also provided with an air inlet hole on the handle, so that the outside air can flow into the outer shell. Setting a transfer air duct can guide the air flowing into the handle into the electrical box body, which can effectively shorten the stroke of the air inlet channel and reduce the air volume loss along the way. Moreover, setting a transfer air duct can make the air flow into the electrical box body more concentrated, avoid the air flowing to the place in the outer shell cavity where heat dissipation is not required, and speed up the heat dissipation efficiency of the electrical box body. Compared to only setting a heat dissipation window on the electrical box body, only using the air in the outer shell to form convection, which has a poor heat dissipation effect, the present invention can not only introduce the outside air, but also introduce the introduced air into the electrical box body to the greatest extent, and no additional heat dissipation openings need to be added to the outer shell, so as to achieve a good heat dissipation air duct function for the electrical box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0020] Figure 1 A schematic diagram of an outdoor unit according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the air flow path in the outdoor unit according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the heat dissipation structure of the electrical box according to an embodiment of the present utility model;

[0023] Figure 4 A schematic diagram of a mounting hole according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the handle of an embodiment of the utility model installed in the mounting hole;

[0025] Figure 6 for Figure 5 Cross-sectional view at the middle BB;

[0026] Figure 7 A schematic diagram of a handle according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of a second side panel according to an embodiment of the present invention;

[0028] Figure 9 for Figure 8Cross-sectional view at AA in the middle;

[0029] Figure 10 for Figure 9 A magnified detail of point A in the middle.

[0030] Figures: 1-electrical box body; 101-first heat dissipation hole; 2-handle; 201-air inlet; 21-opening; 22-channel; 221-first side panel; 222-second side panel; 3-transfer air duct; 4-housing; 401-mounting hole; 5-partition; 501-first chamber; 502-second chamber; 503-second heat dissipation hole; 6-fan; 7-compressor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0035] See also Figures 1 to 3 As shown, according to an embodiment of the present invention, a heat dissipation structure of an electrical appliance box is provided, which includes an electrical appliance box body 1, a handle 2 and a transfer air duct 3; the electrical appliance box body 1 is arranged in a shell 4, the handle 2 is installed on the shell 4, the air inlet end of the transfer air duct 3 is connected to the handle 2, and the air outlet end of the transfer air duct 3 is connected to the electrical appliance box body 1; an air inlet hole 201 is provided on the handle 2, and the air inlet hole 201 is used to connect the transfer air duct 3 with the outside world, and a first heat dissipation hole 101 is provided on the electrical appliance box, and the first heat dissipation hole 101 is connected to the transfer air duct 3.

[0036] It is worth mentioning that the handle 2 in this embodiment has the functions of providing a gripping position and connecting to the external environment.

[0037] Specifically, when the handle 2 only serves as a handle, when the hand holds the handle 2 or puts the hand into the handle 2, the handle 2 is equivalent to providing a fulcrum, which can carry the entire shell 4.

[0038] Specifically, when the handle 2 plays a role in heat dissipation, the air inlet 201 is connected to the external environment, and the external air first flows into the handle 2 through the air inlet 201. The adapter air duct 3 and the air inlet 201 are connected, and the air then flows into the adapter air duct 3. Since the electrical box is provided with a first heat dissipation hole 101, the air in the adapter air duct 3 then flows into the electrical box body 1. In this way, an air inlet channel is formed between the air inlet 201, the adapter air duct 3 and the first heat dissipation hole 101, that is, the handle 2, the adapter air duct 3 and the electrical box body 1 are connected in sequence, and the air in the air inlet channel flows into the electrical box body 1 to dissipate heat for the electrical box body 1.

[0039] In this embodiment, compared to providing only a handle 2 on the outer shell 4, the handle 2 in this embodiment is not only convenient for carrying the outer shell 4, but is also provided with an air inlet 201 on the handle 2, allowing outside air to flow into the outer shell 4. The provision of a transfer duct 3 can guide the air flowing into the handle 2 into the electrical box body 1, which can effectively shorten the travel of the air inlet channel and reduce air volume loss along the way. Moreover, the provision of the transfer duct 3 can make the air flow into the electrical box body 1 more concentrated, preventing the air from flowing into the cavity of the outer shell 4 where heat dissipation is not required, thereby accelerating the heat dissipation efficiency of the electrical box body 1. Compared to providing only a heat dissipation window on the electrical box body 1, which only uses the air in the outer shell 4 to form convection and has poor heat dissipation effect, this embodiment can not only introduce outside air, but also introduce the introduced air into the electrical box body 1 to the greatest extent, without the need to add additional heat dissipation openings on the outer shell 4, thereby achieving a good electrical box heat dissipation duct function.

[0040] As a specific implementation, this embodiment describes a first heat dissipation hole 101 provided on the electrical box body 1. This first heat dissipation hole 101 is connected to the transfer air duct 3, illustrating a connection with the external environment. In other embodiments, the electrical box body 1 may have additional first heat dissipation holes 101 provided at other locations. These first heat dissipation holes 101 are connected to the cavity of the outer shell 4, meaning that air from the cavity of the outer shell 4 can also flow into the electrical box body 1. This connection between the electrical box body 1 and both the cavity of the outer shell 4 and the outside world further improves air circulation efficiency and accelerates cooling of the electrical box body 1.

[0041] As a specific embodiment, a conventional heat dissipation method also involves installing a heat sink within the electrical box body 1. Current electrical boxes typically use heat sinks to reduce the temperature of electronic components. Specifically, a heat sink is installed below the mainboard's heat-generating area, and the heat generated by the mainboard's electronic components is removed by the rotation of a fan 6. In this embodiment, the handle 2 and transfer duct 3 can be provided in addition to the heat sink, or, to reduce the weight of the electrical box body 1, only the handle 2 and transfer duct 3 can be provided.

[0042] In this embodiment, the handle 2 can be installed in at least two ways. The first installation method is to connect the handle 2 to the outer wall of the housing 4. The handle 2 is still provided with an air inlet hole 201, and the outer wall of the housing 4 is provided with a hole corresponding to the air inlet hole 201. Alternatively, the outer wall of the handle 2 is embedded in the outer wall of the housing 4. This installation method can also meet the requirements of convenient transportation and communication with the external environment. The second installation method is to completely locate the handle 2 in the cavity of the housing 4. In this method, the handle 2 is not completely exposed to the outside of the housing 4, which can better protect against rain and insects.

[0043] See also Figures 1 to 5 As shown, a mounting hole 401 is provided on the housing 4 , the handle 2 is installed in the mounting hole 401 , and the handle 2 is embedded in the cavity of the housing 4 .

[0044] Specifically, the installation position of the handle 2 is selected, a mounting hole 401 is opened on the housing 4, and the handle 2 is installed in the mounting hole 401. After the installation is completed, the handle 2 is located in the cavity of the housing 4 as a whole.

[0045] In this embodiment, when the shell 4 needs to be carried, the hand can be inserted into the handle 2. The handle 2 is generally located in the cavity of the shell 4. This setting will not affect the carrying. In addition, considering that the handle 2 is also provided with an air inlet hole 201, this setting can reduce the impact of the external environment on the air intake, and the overall structure is more compact. It can be installed on an air-conditioning outdoor unit with a smaller shell size of a single fan 6, and can also be installed on an air-conditioning outdoor unit with a larger shell size such as a dual fan 6.

[0046] See also Figures 6 to 9 As shown, the handle 2 includes an opening portion 21 and a channel portion 22. The opening portion 21 is installed in the mounting hole 401, and the channel portion 22 is arranged in the shell 4. One end of the opening portion 21 is connected to the outside world, and one end of the opening portion 21 extends into the shell 4 and is connected to the channel portion 22. The air inlet 201 is arranged on the channel portion 22.

[0047] In this embodiment, when the handle 2 is used for carrying, the opening 21 and the channel 22 are connected. The hand extends from the opening 21 into the channel 22, which serves to extend the grip, increasing the grip area and making it easier to lift the housing 4. The design of the handle 4 takes ergonomics into consideration, making it more comfortable for the user to lift the housing 4 and reducing hand fatigue. In addition, an air inlet 201 is provided on the channel 22, so that air entering the channel 22 from the opening 21 can flow into the transfer duct 3 through the air inlet 201.

[0048] As a specific embodiment, the handle 2 is integrally formed, that is, the opening 21 and the channel 22 are integrally formed, which increases the structural strength between the opening 21 and the channel 22 and prevents the opening 21 and the channel 22 from separating during repeated transportation. The handle 2 is not only practical, but its design also coordinates with the overall appearance of the housing 4, enhancing the overall aesthetics of the product.

[0049] In a specific embodiment, the channel portion 22 is generally parallel to the inner wall of the housing 4. This allows a hand to bend naturally when inserted into the channel portion 22 through the opening 21, thereby better applying force. In other embodiments, there is an angle between the channel portion 22 and the inner wall of the housing 4, that is, the channel portion 22 is generally tilted in the cavity of the housing 4.

[0050] See also Figure 9 and Figure 10 As shown, the air inlet holes 201 are opened on the side wall of the channel portion 22 , and a plurality of air inlet holes 201 are evenly distributed on at least one side wall of the channel portion 22 .

[0051] In this embodiment, based on air intake requirements, air inlet holes 201 are provided on at least one side wall of the channel portion 22. The air inlet end of the transfer duct 3 is connected to the side wall of the channel portion 22, and the air inlet holes 201 are evenly distributed on this side wall. Air inlet holes 201 may also be evenly distributed on other side walls of the channel portion 22. This allows air to flow into both the transfer duct 3 and the cavity of the outer shell 4, thereby cooling the internal environment of the outer shell 4. The evenly distributed air inlet holes 201 help reduce material fatigue, thereby improving the durability and service life of the handle 2. This arrangement can also adapt to different usage environments and conditions, maintaining good ventilation and heat dissipation performance in hot, humid, or dusty environments.

[0052] See also Figure 9 and Figure 10 As shown, the air inlet 201 has an inclination angle. With the longitudinal section of the channel portion 22 as the projection surface, there is an angle between the central axis of the air inlet 201 and the inner wall of the channel portion 22. The angle ɑ is 15° to 45°, which provides better rain protection. The aperture of the air inlet 201 is 2mm to 4mm, which provides insect protection.

[0053] In this embodiment, the air inlet 201 is angled during fabrication. Compared to a straight air inlet 201, the air inlet 201 forms an angle with the channel portion 22. When rain falls on the handle 2, even if it flows into the opening 21, the tilt of the air inlet 201 prevents the rain from flowing directly into the housing 4, thereby improving the waterproof performance of the housing 4. Rainproofing is achieved through the position of the air inlet 201 on the handle 2, the tilt angle of the air inlet 201 itself, and the size of the aperture. The aperture is designed to range from 2 mm to 4 mm, which is generally smaller than the size of most insects. This smaller aperture prevents most insects from entering the housing 4. Furthermore, good air circulation helps reduce humidity within the handle 2 and the housing 4. Many insects prefer humid environments, which reduces their attraction and acts as an insect repellent. In other embodiments, the inclined air inlet 201 is part of the overall protective arrangement of the handle 4 and is used in conjunction with other protective measures, such as a sealing ring and a filter, to more effectively prevent insects from entering. It is worth noting that this arrangement of the present embodiment can provide a certain degree of insect repellency, but it cannot completely prevent all types of insects from entering.

[0054] See also Figures 3 to 7 As shown, the channel portion 22 is a box structure, and the bottom side of the channel portion 22 has an opening, and the opening is connected to the opening portion 21, that is, the bottom side of the channel portion 22 has an opening, and the channel portion 22 includes a first side panel 221 and a second side panel 222 arranged opposite to each other, the first side panel 221 is connected to the inner wall of the outer shell 4, the second side panel 222 is connected to the air inlet end of the transfer air duct 3, and the air inlet hole 201 is arranged on the second side panel 222.

[0055] Specifically, taking the longitudinal section of the handle 2 as the projection plane, the first side panel 221 is connected to the inner wall of the outer shell 4, and a plurality of air inlet holes 201 are evenly distributed on the second side panel 222. The air inlet holes 201 have an inclination angle. Taking the longitudinal section of the channel portion 22 as the projection plane, there is an angle between the central axis of the air inlet hole 201 and the inner wall of the channel portion 22, and the angle is 15° to 45°.

[0056] In this embodiment, the bottom of the channel portion 22 is connected to the opening portion 21, and the bottom side of the channel portion 22 has an opening, so that the opening portion 21 and the channel portion 22 are interconnected, and the cross-sectional area of ​​the opening is the same as the cross-sectional area of ​​the opening portion 21, ensuring that the two components can be connected together, so that the hand can contact the inner wall of the first side panel 221, thereby facilitating handholding. The channel portion 22 must be connected to the air inlet end of the transfer air duct 3. In order to better guide the air into the channel portion 22, a sufficient number of air inlet holes 201 must be opened. The air inlet holes 201 are set on the second side panel 222. The area of ​​the second side panel 222 is larger, and a reasonable number of air inlet holes 201 can be set according to the air intake requirements. Secondly, when the handle 2 serves as a handle, the hand-holding position is on the first side panel 221, which requires the structural strength of the first side panel 221 to be greater, while no external force needs to be applied to the second side panel 222, and the structural strength requirement does not need to be too high. Therefore, the air inlet holes 201 are set on the second side panel 222, which can avoid opening holes on the first side panel 221 to reduce its strength. In combination with the force characteristics, the air inlet holes 201 are set on the second side panel 222, and the overall weight of the handle 2 can be reduced by opening the air inlet holes 201 on the second side panel 222. The second side plate 222 is a straight plate, and there is no need to use a mold forming process to achieve the arc shape of the second side plate 222, which increases the mold manufacturing cost in production.

[0057] As a specific embodiment, the channel portion 22 also includes a third side panel and a fourth side panel that respectively seal the first side panel 221 and the second side, and a top panel above the four side panels. In this embodiment, the channel portion 22 is box-shaped by providing five panels to prevent rainwater and mosquitoes from entering the channel portion 22 from the top.

[0058] As a specific embodiment, in order to ensure the stability of the handle 2 structure, when the handle 2 is made of metal, it is connected to the inner wall of the shell 4 by welding; when the handle 2 is made of plastic, it is connected to the inner wall of the shell 4 by gluing. In order to facilitate the installation of the handle 2, only the opening 21 can be fixedly connected to the mounting hole 401.

[0059] As a specific embodiment, the opening portion 21 is provided with a flange. After the opening portion 21 is installed in the mounting hole 401, the flange is clamped with the outer wall of the shell 4, the second side panel 222 is connected to the inner wall of the shell 4, and the connection between the flange and the opening portion 21 is arc-shaped, which is convenient for hand holding.

[0060] See also Figure 3 As shown, it is characterized in that the transfer air duct 3 has a gradually expanding structure, the cross-sectional area of ​​the air inlet end of the transfer air duct 3 is smaller than the cross-sectional area of ​​the air outlet end of the transfer air duct 3, the air inlet end of the transfer air duct 3 is a small opening, and the air outlet end of the transfer air duct 3 is a large opening.

[0061] In this embodiment, the transfer air duct 3 serves to connect the handle 2 and the electrical box body 1. The transfer air duct 3 can centrally guide the heat dissipation airflow into the electrical box body 1, forming a precise airflow organization and improving the heat dissipation efficiency. In the gradually expanding transfer air duct 3, air flows from the smaller air inlet end to the larger air outlet end. According to the principles of fluid mechanics, this will lead to an increase in air flow velocity, which helps to improve the efficiency of air flow. Moreover, the gradually expanding structure helps to reduce turbulence and eddy currents in the air flow process, thereby reducing the noise level and making the device run quieter. In addition, the gradually expanding air outlet end helps to guide the air more evenly into the electrical box body 1.

[0062] As a specific embodiment, a first heat dissipation hole 101 is provided on the side wall of the electrical box body 1 facing the adapter air duct 3. The cross-sectional area of ​​the first heat dissipation hole 101 is smaller than the cross-sectional area of ​​the air outlet end of the adapter air duct 3. The adapter air duct 3 serves as a component connecting the handle 2 and the electrical box body 1. The air entering the handle 2 from the outside first passes through the adapter air duct 3. Since the cross-sectional area of ​​the air outlet end of the adapter air duct 3 is large, it passes through the first heat dissipation hole 101 with a smaller cross-sectional area. In this process, the airflow undergoes a transformation from a large channel to a small hole channel. The airflow velocity increases when flowing through the first heat dissipation hole 101. According to Bernoulli's principle, the pressure here will decrease. Then according to the gas state equation C=PV / T, where C is a constant, P is pressure, V is flow velocity, and T is temperature, the temperature of the airflow will decrease when it flows out of the first heat dissipation hole 101, thereby realizing the transformation of normal temperature airflow to low temperature airflow, further improving the heat dissipation effect of the electrical components in the electrical box body 1.

[0063] See also Figures 1 to 3 As shown, a partition 5 is provided in the outer shell 4, and the partition 5 divides the outer shell 4 into a first chamber 501 and a second chamber 502. The electrical box body 1 is provided in the first chamber 501, and a fan 6 is provided in the second chamber 502. A second heat dissipation hole 503 is provided on the partition 5, and the second heat dissipation hole 503 is communicated with the inner cavity of the electrical box body 1 to form an air inlet channel between the air inlet hole 201, the transfer air duct 3, the first heat dissipation hole 101 and the second heat dissipation hole 503.

[0064] Specifically, when the fan 6 is operating normally, since the partition 5 is provided with the second heat dissipation hole 503, that is, the first chamber 501 and the electrical box body 1 are connected, and the air inlet 201 is connected to the external environment, the rotation of the fan blades of the fan 6 causes the area where the electrical box body 1 is located to be in a negative pressure state. The external air first flows into the handle 2 through the air inlet 201, and the transfer duct 3 is connected to the air inlet 201, and the air then flows into the transfer duct 3. Since the electrical box is provided with the first heat dissipation hole 101, the air in the transfer duct 3 then flows into the electrical box body 1. After flowing into the electrical box body 1, the air dissipates heat from the electrical components in the electrical box body 1 during the flow process, and then flows out from the second heat dissipation hole 503 and flows to the area where the fan blades of the fan 6 are located, thereby achieving the effect of forced convection heat dissipation of the electrical box body 1.

[0065] In this embodiment, even without the fan 6, air in the handle 2 can flow into the transfer duct 3. When the fan 6 is provided, the fan 6 functions to create a negative pressure region within the housing 4, drawing in external air, thereby accelerating air flow and further facilitating forced convection within the electrical box body 1. The second heat dissipation holes 503 connect the first chamber 501 with the electrical box body 1. The location of the second heat dissipation holes 503 also determines the air flow path.

[0066] As a specific embodiment, the first heat dissipation holes 101 are strip-shaped holes formed on the sidewall of the electrical box body 1. The openings of the first heat dissipation holes 101 are located near the heat-generating components of the electrical box body 1. Due to the structural limitations of the electrical box body 1, the components within the electrical box body 1 are arranged more compactly, resulting in poorer overall heat dissipation and a significant problem with component temperature rise. Conventional electrical box bodies 1 are typically provided with a circuit board, which is equipped with a chip, inductor, and / or capacitor. The first heat dissipation holes 101 are arranged corresponding to the chip, inductor, and / or capacitor. Generally, the circuit board is equipped with three components: the chip, inductor, and capacitor. These three components are the main heat-generating components. If the heat generated by these three components cannot be dissipated in a timely manner, the temperature of these components will rise excessively, reducing their reliability. Therefore, aligning the first heat dissipation holes 101 on the electrical box body 1 with the chip, inductor, and capacitor allows airflow to flow directly to these three components, cooling them and preventing excessive temperature rise. Furthermore, directing the airflow toward these three components can also accelerate air flow over the surfaces of these three components, increasing the efficiency of heat exchange between them and the air, and improving the heat exchange effect. Multiple first heat dissipation holes 101 can be provided, with at least one first heat dissipation hole 101 provided at each location corresponding to the chip, inductor, and capacitor.

[0067] Specifically, the first heat dissipation hole 101 and the second heat dissipation hole 503 are arranged relative to each other, and the heat generated by the chip, inductor and / or capacitor flows into the electrical box body 1 through the first heat dissipation hole 101. The heat in the electrical box body 1 flows within a preset distance between the edge of the circuit board and the electrical box body 1 and within a preset distance between the surface of the component and the electrical box body 1, and the heat is discharged through the second heat dissipation hole 503. The heat dissipation path formed between the first heat dissipation hole 101 and the second heat dissipation hole 503 can dissipate heat from the components.

[0068] See also Figures 1 to 3 As shown, an air conditioner outdoor unit includes an electrical box heat dissipation structure, and the electrical box heat dissipation structure is the electrical box heat dissipation structure mentioned above.

[0069] Specifically, a partition 5 is provided between the first chamber 501 and the second chamber 502, mainly to reserve a gap to ensure that after the first heat dissipation hole 101 on the electrical box body 1 discharges heat, the air can flow through the through hole to form a second heat dissipation hole 503. Secondly, the matching gap is reserved between the parts to facilitate the assembly of the parts.

[0070] See also Figures 1 to 3 As shown, a compressor 7 is provided at the bottom of the housing 4 , and the installation height of the handle 2 is higher than the compressor 7 .

[0071] Specifically, if heat dissipation windows are designed on the electrical box body 1, the partition 5, and the entire housing 4, since the outdoor unit must consider the need for the electrical box body 1 to be rainproof, the heat dissipation windows on the entire housing 4 are usually located in the bottom area of ​​the housing 4, resulting in the heat dissipation airflow formed necessarily passing through the high-temperature area of ​​the compressor 7 and the exhaust pipe, thereby increasing the airflow temperature. In addition, the heat dissipation duct has a long travel distance and large airflow losses along the way. The above problems will have a negative impact on the heat dissipation effect of the electrical box body 1. In this example, the installation height of the handle 2 is higher than the compressor 7. The use of this embedded heat dissipation duct in the handle 2 can effectively shorten the travel distance of the heat dissipation duct and reduce air volume losses along the way. At the same time, it avoids passing through the high-temperature area where the compressor 7 is located and reduces or avoids contact with the high-temperature area where the exhaust pipe is located, thereby minimizing the impact of the high-temperature environment in the housing 4 on the heat dissipation airflow.

[0072] Furthermore, the handle 2 is embedded within the cavity of the outer shell 4, providing rain and insect protection, preventing water and insects from entering the top electrical box. Furthermore, no additional heat dissipation holes need to be added to the outer shell 4, ensuring a good heat dissipation duct for the electrical box. This integrated design makes production and maintenance more economical and heat dissipation more efficient.

[0073] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are only preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and variations can be made without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An electrical box heat dissipation structure, characterized in that: include: An electrical box body (1), a handle (2) and a transfer air duct (3); The electrical box body (1) is arranged in the housing (4), the handle (2) is mounted on the housing (4), the air inlet end of the transfer air duct (3) is connected to the handle (2), and the air outlet end of the transfer air duct (3) is connected to the electrical box body (1); The handle (2) is provided with an air inlet (201), and the air inlet (201) is used to connect the switching air duct (3) with the outside world. The electrical box body (1) is provided with a first heat dissipation hole (101), and the first heat dissipation hole (101) is connected with the switching air duct (3).

2. The heat dissipation structure of the electrical box according to claim 1, characterized in that: The housing (4) is provided with a mounting hole (401), the handle (2) is mounted in the mounting hole (401), and the handle (2) is embedded in the cavity of the housing (4).

3. The heat dissipation structure of the electrical box according to claim 2, characterized in that: The handle (2) includes an opening portion (21) and a channel portion (22), wherein the opening portion (21) is installed in the installation hole (401), and the channel portion (22) is arranged in the shell (4), one end of the opening portion (21) is communicated with the outside, and one end of the opening portion (21) extends into the shell (4) and is communicated with the channel portion (22), and the air inlet (201) is arranged on the channel portion (22).

4. The heat dissipation structure of the electrical box according to claim 3, characterized in that: The air inlet holes (201) are provided on the side walls of the channel portion (22), and a plurality of the air inlet holes (201) are evenly distributed on at least one side wall of the channel portion (22).

5. The heat dissipation structure of the electrical box according to claim 4, characterized in that: The air inlet hole (201) has an inclination angle. With the longitudinal section of the channel portion (22) as a projection plane, an angle is formed between the central axis of the air inlet hole (201) and the inner wall of the channel portion (22). The angle is 15° to 45°. The aperture of the air inlet hole (201) is 2 mm to 4 mm.

6. The heat dissipation structure of the electrical box according to claim 4, characterized in that: The channel portion (22) is in a box structure, and the bottom side of the channel portion (22) has an opening, and the opening is connected to the opening portion (21); the channel portion (22) includes a first side plate (221) and a second side plate (222) arranged opposite to each other, the first side plate (221) is connected to the inner wall of the outer shell (4), the second side plate (222) is connected to the air inlet end of the transfer air duct (3), and the air inlet hole (201) is arranged on the second side plate (222).

7. The heat dissipation structure of an electrical appliance box according to any one of claims 1 to 6, characterized in that: The switching air duct (3) has a gradually expanding structure, and the cross-sectional area of ​​the air inlet end of the switching air duct (3) is smaller than the cross-sectional area of ​​the air outlet end of the switching air duct (3).

8. The heat dissipation structure of the electrical box according to claim 1, characterized in that: A partition (5) is provided in the housing (4), and the partition (5) divides the housing (4) into a first chamber (501) and a second chamber (502). The electrical box body (1) is provided in the first chamber (501), and a fan (6) is provided in the second chamber (502). A second heat dissipation hole (503) is provided on the partition (5), and the second heat dissipation hole (503) is communicated with the inner cavity of the electrical box body (1).

9. An air conditioner outdoor unit, comprising an electrical box heat dissipation structure, characterized in that: The heat dissipation structure of the electrical appliance box is the heat dissipation structure of the electrical appliance box according to any one of claims 1 to 8.

10. The air conditioner outdoor unit according to claim 9, characterized in that: A compressor (7) is provided at the bottom of the housing (4), and the installation height of the handle (2) is higher than the compressor (7).

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