Air conditioner outdoor unit

Abstract

The utility model discloses an air conditioner outdoor unit, and belongs to the technical field of air treatment. The air conditioner indoor unit comprises a machine shell, a heat exchanger, a compressor, a fan, an electric control board and a radiator. The radiator comprises a substrate, fins and a bridge opening plate, and the fins are provided with bridge opening parts; the open bridge plates are arranged on the fins and are connected with the edges of the open bridge parts; the ratio of the height of the bridge plate in the direction perpendicular to the surfaces of the fins to the width of the heat dissipation channel where the bridge plate is located is S, S is larger than or equal to 0.25, and S is smaller than or equal to 0.45. According to the improvement, the open bridge parts and the open bridge plates are arranged on the fins, so that the continuity of a thermal boundary layer is destroyed, the Nusselt number is increased, the heat exchange coefficient of the surface of the radiator is remarkably improved, the heat dissipation capability is enhanced, the temperature of a power device is effectively reduced, and the service life of the power device is prolonged. And in addition, excessive obstruction of the open bridge plate to the airflow in the heat dissipation channel can be avoided, the flowing smoothness of the airflow in the heat dissipation channel is guaranteed, and it is guaranteed that the heat dissipation capacity is enhanced by arranging the open bridge plate.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, and in particular relates to an outdoor unit for an air conditioner. Background Technology

[0002] The outdoor unit of an air conditioner is a core component of the air conditioning system, responsible for refrigerant condensation and heat dissipation to maintain normal operation. Installed outdoors, it is exposed to the natural environment and faces complex climatic conditions and operating conditions. The power devices in the outdoor unit generate heat during operation; if heat dissipation is inadequate, performance will decrease, lifespan will be shortened, and even malfunctions may occur, affecting system stability. Therefore, to ensure the power devices can operate continuously and stably in high-temperature environments, they must be equipped with highly efficient heat sinks.

[0003] Currently, most air conditioner outdoor unit radiators employ flat or corrugated surface structures. Flat surface radiators are simple in structure and low in cost; corrugated surface radiators increase the heat dissipation area and improve heat dissipation efficiency by adding corrugations. Both of these structural designs and manufacturing technologies are relatively mature and widely used.

[0004] Global warming is leading to frequent high temperatures, especially in summer, with temperatures in some areas continuing to rise, making the heat dissipation environment for air conditioner outdoor units increasingly harsh. Increased air conditioning functionality and the growing number of power devices result in increased heat generation from these components, placing higher demands on radiators. Existing radiators are inefficient; flat-surface radiators offer limited cooling, and corrugated-surface radiators provide only limited improvement in heat dissipation. This causes power devices to overheat in high-temperature environments, limiting cooling capacity, impacting user experience, and failing to meet the demands of higher-temperature operating conditions. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, one aspect of this application proposes an outdoor unit for an air conditioner, comprising:

[0007] chassis;

[0008] The heat exchanger is housed within the casing; it is used for heat exchange with outdoor air.

[0009] The compressor is housed in the casing; together with the heat exchanger and evaporator, the compressor forms a refrigerant circulation loop. The compressor is used to compress low-pressure refrigerant gas into high-pressure refrigerant gas and drive the refrigerant to flow in the refrigerant circulation loop.

[0010] The fan is housed within the casing; the fan is used to drive air into contact with the heat exchanger.

[0011] The electronic control board is located inside the housing; it is used to control the operating status of the compressor and fan; power devices are installed on the electronic control board.

[0012] A heat sink is mounted on the power device; the heat sink includes:

[0013] The substrate is attached to the surface of the power device;

[0014] Fins are disposed on a substrate; multiple fins are arranged at intervals along a first direction to form heat dissipation channels between adjacent fins, the first direction being parallel to the surface of the substrate; bridging portions are provided on the fins to connect two heat dissipation channels on both sides of the fins.

[0015] A bridge plate is installed on the fins and connects to the edge of the bridge section;

[0016] The ratio of the height of the bridging plate to the width of the heat dissipation channel in the direction perpendicular to the fin surface is S, where S≥0.25 and S≤0.45.

[0017] In this technical solution, the structural design disrupts the continuity of the thermal boundary layer by creating bridging sections and installing bridging plates on the fins, thereby increasing the Nusselt number and significantly improving the heat transfer coefficient of the radiator surface. This enhances heat dissipation capacity and effectively reduces the temperature of power devices. The bridging sections connect adjacent heat dissipation channels, allowing for smoother airflow within the channels, reducing dead zones, and improving the overall heat dissipation uniformity of the radiator. The proportion of the bridging plate height to the width of the heat dissipation channel is carefully designed to prevent excessive obstruction of airflow within the channel, ensuring smooth airflow and maximizing the heat dissipation enhancement effect of the bridging plates.

[0018] In some embodiments, the two ends of the bridging plate are respectively connected to the edges on both sides of the bridging portion to form a flow diversion channel between the bridging plate and the fins.

[0019] In the technical solution, this structural design can not only disperse the stress on the bridge plate and reduce the risk of thermal fatigue, but also maintain the structural strength of the fins after the opening. On the other hand, the diversion channel further optimizes the distribution of airflow in the heat dissipation channel, so that the airflow can flow more evenly across the fin surface and the bridge plate surface, thereby improving the heat dissipation uniformity of the entire radiator.

[0020] In some embodiments, the middle of the bridge plate is bent to make the cross-section of the diversion channel triangular.

[0021] In the technical solution, the structural design gives the bridge plate an angular structure, which more effectively disturbs the airflow in the heat dissipation channel, improves heat dissipation efficiency, and reduces material usage. On the other hand, it enables the airflow flowing along the fin wall to form vortices in the space of the split channel, which more effectively disturbs the airflow, and the vortices can intensify the flow of airflow between adjacent heat dissipation channels, thereby improving heat dissipation efficiency.

[0022] In some embodiments, multiple bridging plates are spaced apart along a direction away from the substrate; multiple bridging plates are spaced apart along a second direction, which is parallel to the fin surface and the substrate surface.

[0023] In the technical solution, the structural design forms a multi-stage turbulence structure, which increases the number of turbulences in the airflow path and improves the overall heat dissipation performance of the heat sink; on the other hand, it maximizes the heat dissipation area within a limited fin area, providing more space for heat dissipation and helping to further reduce the temperature of power devices.

[0024] In some embodiments, adjacent open-bridge plates are staggered in the second direction.

[0025] In this technical solution, the structural design makes the heat dissipation effect of the fins more uniform at different positions, avoids the problem of poor local heat dissipation, and improves the heat dissipation efficiency and reliability of the entire radiator. On the other hand, it can strengthen various positions of the fins, improve the stability of the fin structure, and enable it to better resist airflow impact and vibration during the operation of the outdoor unit of the air conditioner, thus extending the service life of the radiator.

[0026] In some embodiments, adjacent diversion channels in the second direction are located on the same straight line.

[0027] In this technical solution, the structural design facilitates the straight flow of air, reduces the flow resistance of air in the heat dissipation channel, and increases the flow speed of air, thereby enhancing the heat dissipation effect.

[0028] In some embodiments, the bridging plates all bulge in the same direction relative to the fins to which they are connected.

[0029] In the technical solution, the structural design allows the fins to have an open bridge plate on one side, and the heat dissipation channel has only one open bridge plate on one fin, which avoids the airflow being obstructed due to too many open bridge plates in the heat dissipation channel and ensures efficient heat dissipation.

[0030] In some embodiments, the ratio between the width of the bridging plate in the direction away from the substrate and its height in the direction perpendicular to the fin is B, where B ≥ 1.8 and B ≤ 2.2.

[0031] In the technical solution, this structural design ensures that the open bridge plate does not occupy too much of the width space of the heat dissipation channel, while increasing the surface area of ​​the open bridge plate and improving its heat dissipation performance.

[0032] In some embodiments, the width of the bridging plate in the direction away from the substrate is W. k W k Greater than or equal to 7mm, and W k Less than or equal to 9mm.

[0033] In the technical solution, this structural design can better utilize the heat dissipation function of the open bridge plate in practical applications, ensuring the stable operation of the radiator in high-temperature environments.

[0034] In another aspect of this application, an outdoor unit for an air conditioner includes:

[0035] chassis;

[0036] The heat exchanger is housed within the casing; it is used for heat exchange with outdoor air.

[0037] The compressor is housed in the casing; together with the heat exchanger and evaporator, the compressor forms a refrigerant circulation loop. The compressor is used to compress low-pressure refrigerant gas into high-pressure refrigerant gas and drive the refrigerant to flow in the refrigerant circulation loop.

[0038] The fan is housed within the casing; the fan is used to drive air into contact with the heat exchanger.

[0039] The electronic control board is located inside the housing; it is used to control the operating status of the compressor and fan; power devices are installed on the electronic control board.

[0040] A heat sink is mounted on the power device; the heat sink includes:

[0041] The substrate is attached to the surface of the power device;

[0042] Fins are disposed on a substrate; multiple fins are disposed in sequence at intervals to form heat dissipation channels between adjacent fins.

[0043] An open-bridge structure is provided on the fin; the open-bridge structure protrudes from the surface of the fin toward the adjacent fin and is used to connect adjacent heat dissipation channels.

[0044] The ratio of the height of the bridging structure to the width of the heat dissipation channel in the direction perpendicular to the fin surface is S, where S≥0.25 and S≤0.45.

[0045] In this technical solution, the structural design disrupts the continuity of the thermal boundary layer by creating bridging sections and installing bridging plates on the fins, thereby increasing the Nusselt number and significantly improving the heat transfer coefficient of the radiator surface. This enhances heat dissipation capacity and effectively reduces the temperature of power devices. The bridging sections connect adjacent heat dissipation channels, allowing for smoother airflow within the channels, reducing dead zones, and improving the overall heat dissipation uniformity of the radiator. The proportion of the bridging plate height to the width of the heat dissipation channel is carefully designed to prevent excessive obstruction of airflow within the channel, ensuring smooth airflow and maximizing the heat dissipation enhancement effect of the bridging plates.

[0046] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a perspective view of an outdoor air conditioning unit with the fan and part of the casing concealed, according to an embodiment of this application.

[0049] Figure 2 A three-dimensional view of the radiator in the outdoor unit of an air conditioner according to an embodiment of this application. Figure 1 ;

[0050] Figure 3 A three-dimensional view of the radiator in the outdoor unit of an air conditioner according to an embodiment of this application. Figure 2 ;

[0051] Figure 4 This is a partial enlarged view of a perspective view of the radiator in an outdoor unit of an air conditioner according to an embodiment of this application;

[0052] Figure 5 This is a front view of the radiator in the outdoor unit of an air conditioner according to an embodiment of this application;

[0053] Figure 6 This is a top view of the radiator in the outdoor unit of an air conditioner according to an embodiment of this application;

[0054] Figure 7 This is a partially enlarged view of the front view of the radiator in the outdoor unit of an air conditioner according to an embodiment of this application;

[0055] Figure 8 This is a three-dimensional representation of the radiator in the outdoor unit of an air conditioner according to an embodiment of this application, where the bridging plate is set in an arc shape. Figure 2

[0056] Figure 9 This is a schematic diagram of airflow when the radiator in the outdoor unit of an air conditioner according to an embodiment of this application has an arc-shaped bridging plate. Figure 2

[0057] Figure 10 This is a schematic diagram of airflow when the radiator in the outdoor unit of an air conditioner according to an embodiment of this application is bent into a triangular cross section by bending the bridge plate.

[0058] In the above figures:

[0059] 101. Casing; 102. Outdoor air outlet; 103. Heat exchanger; 104. Middle partition; 105. Heat exchange chamber; 106. Electrical cavity II

[0060] 200. Power devices;

[0061] 300, Heat sink; 301, Base plate; 302, Fins; 303, Bridge section; 304, Bridge plate; 305, Heat dissipation channel; 306, Diversion channel. Detailed Implementation

[0062] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0063] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0065] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0066] Air conditioners execute a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle involves a series of processes including compression, condensation, expansion, and evaporation, supplying refrigerant to the conditioned and heat-exchanged air.

[0067] The compressor compresses refrigerant gas at a low temperature and low pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0068] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0069] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0070] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0071] When the indoor and outdoor units of an air conditioner are separate units, the indoor unit is also called the indoor air conditioner unit, and the outdoor unit is also called the outdoor air conditioner unit.

[0072] The embodiments of this application are described below with reference to the accompanying drawings:

[0073] refer to Figure 1 According to the embodiments of this application, the outdoor unit of the air conditioner includes a housing 101, in which a plurality of components constituting a refrigeration cycle are installed.

[0074] The housing 101 may be generally rectangular in shape, including a bottom surface defining the bottom structure, a top surface defining the top structure, and a side surface disposed between the top surface and the bottom surface.

[0075] The housing 101 includes an outdoor air inlet through which outdoor air is introduced. The outdoor air inlet can be formed by opening one side of the housing 101.

[0076] The housing 101 includes an outdoor air outlet 102, through which air introduced by the outdoor air inlet undergoes heat exchange, and then is discharged to the outdoor space through the outdoor air outlet 102.

[0077] The outdoor unit of the air conditioner may include a heat exchanger 103. The heat exchanger 103 is installed inside the casing 101 and exchanges heat with the air drawn in through the outdoor air inlet.

[0078] The heat exchanger 103 may include refrigerant pipes through which refrigerant flows and heat exchange fins connected to the refrigerant pipes to increase the heat exchange area. An outdoor air outlet 102 may be formed by opening at least a portion of the side of the casing 101, and the outdoor air outlet 102 may be opposite to the outdoor air inlet. The heat exchanger 103 may be disposed between the outdoor air inlet and the outdoor air outlet.

[0079] An outdoor unit of an air conditioner may include a compressor. The compressor is installed inside the casing, and together with the heat exchanger and evaporator, it forms a refrigerant circulation loop. The compressor is used to compress low-pressure refrigerant gas into high-pressure refrigerant gas and drive the refrigerant to flow in the refrigerant circulation loop.

[0080] The outdoor unit casing 101 of the air conditioner includes a fan, which is installed inside the casing 101 to provide power for airflow. The heat exchanger 103 can be installed on the air inlet side of the fan, that is, the heat exchanger 103 can be installed close to the outdoor air inlet.

[0081] A partition 104 may be provided inside the casing 101. The partition 104 divides the internal space of the casing 101 into a heat exchange chamber 105 and an electrical chamber 106. The outdoor air inlet and outdoor air outlet 102 are both located on the side of the heat exchange chamber 105. The fan and heat exchanger 103 are both located inside the heat exchange chamber 105.

[0082] Under the action of the fan, air enters the heat exchange chamber 105 from the outdoor air inlet, exchanges heat with the heat exchanger 103, and is then blown out from the outdoor air outlet 102 after passing through the fan.

[0083] refer to Figure 1 The outdoor unit of the air conditioner also includes an electronic control board, which is located in the casing and is used to control the operating status of the compressor and the fan.

[0084] The control board is equipped with power devices 200. Power devices 200 are housed within the housing 101 and located in the electrical cavity 106. Power devices 200 include, but are not limited to, a compressor drive module, a fan drive module, a rectifier bridge module, and an electronic expansion valve drive module.

[0085] The compressor drive module is responsible for controlling the operation of the compressor, including starting, stopping, and speed adjustment.

[0086] The fan drive module controls the fan speed and operating status, and automatically adjusts the fan speed according to the load and heat dissipation requirements of the air conditioning system.

[0087] The rectifier bridge module can rectify and filter the AC power from the mains to output smooth DC power, ensuring the stable operation of the DC motor and the normal operation of the electronic control system.

[0088] The electronic expansion valve drive module controls the opening degree of the electronic expansion valve according to the operating status and needs of the air conditioning system, and precisely adjusts the refrigerant flow to achieve precise control of evaporation temperature and superheat.

[0089] refer to Figure 1 The outdoor unit of the air conditioner also includes a radiator 300. The radiator 300 is mounted on the power device 200. Through contact, the power device 200 transfers heat to the radiator 300, which then dissipates the heat into the air. Under the action of the airflow generated by the fan around or inside the outdoor unit, or under the action of the natural airflow outside, the air carries the heat and dissipates it outside the outdoor unit, thus achieving heat dissipation for the power device 200.

[0090] refer to Figures 2 to 6 as well as Figure 8 The heat sink 300 includes a substrate 301. The substrate 301 is disposed on the power device 200 and attached to the surface of the power device 200, so that the substrate 301 and the power device 200 have a large contact area, allowing the heat generated by the power device 200 during operation to be efficiently transferred to the substrate 301. The substrate 301 is typically made of metal to give it a fast heat transfer rate.

[0091] refer to Figures 2 to 8 The heat sink 300 also includes fins 302. Multiple fins 302 are provided, all disposed on the substrate 301, allowing heat from the substrate 301 to be transferred to the fins 302, increasing the surface area of ​​the heat sink 300 and improving its heat dissipation efficiency. The fins 302 are typically made of metal to provide a faster heat transfer rate.

[0092] The fins 302 are typically perpendicular to the substrate 301 to prevent the fins 302 from covering the surface of the substrate 301 in a direction perpendicular to the surface of the substrate 301, thus ensuring that heat can be smoothly dissipated vertically through the surface of the substrate 301 to the outside of the heat sink 300.

[0093] Multiple fins 302 are arranged sequentially at intervals along a first direction. The space between adjacent fins 302 serves as a heat dissipation channel 305. Under the action of a fan or thermal convection, airflow can pass through the heat dissipation channel 305 along the surface of the substrate 301, efficiently carrying away the heat dissipated by the substrate 301 and the fins 302. The first direction is parallel to the surface of the substrate 301. When the fins 302 are perpendicular to the substrate 301, the first direction is perpendicular to the surface of the fins 302.

[0094] Multiple fins 302 are typically arranged in parallel, so that the width of the heat dissipation channel 305 remains fixed along its length, thus avoiding poor airflow due to changes in the width of the heat dissipation channel 305 and ensuring heat dissipation efficiency.

[0095] A bridging portion 303 is provided on the fin 302. The bridging portion 303 penetrates the fin 302 and connects the two heat dissipation channels 305 on both sides of the fin 302, so that airflow can flow between adjacent heat dissipation channels 305.

[0096] refer to Figures 2 to 8 The radiator 300 also includes a heat exchange plate 304. The heat exchange plate 304 is disposed on the fins 302, so that the heat on the fins 302 can be transferred to the heat exchange plate 304, and then dissipated from the heat exchange plate 304 into the heat dissipation channel. The heat exchange plate 304 further increases the surface area of ​​the radiator 300.

[0097] The bridging plate 304 connects to the edge of the bridging portion 303, allowing the bridging portion 303 and the bridging plate 304 to be formed by stamping, which is easy to manufacture and inexpensive. More specifically, the plate-shaped fin 302 is stamped to form the bridging portion 303. The portion of the fin 302 that was originally located inside the bridging portion 303 is pushed to one side of the fin 302 under the action of stamping. This portion of the fin 302 remains connected to the edge of the bridging portion 303 and serves as the bridging plate 304.

[0098] refer to Figure 5 and Figure 7 In the direction perpendicular to the surface of fin 302, the height H of the bridge plate 304 is... k The width W of the heat dissipation channel 305 where the bridge plate 304 is located s The ratio between them is S, where S≥0.25 and S≤0.45. More specifically, the open bridge plate 304 extends vertically into the interior of the heat dissipation channel 305 and occupies 25% to 45% of its width space.

[0099] In the prior art, the surface of the fins 302 of the radiator 300 is flat. When the airflow flows along the heat dissipation channel 305 between the fins 302, it is easy to form multiple layers with gradually decreasing heat according to the distance from the surface of the fins 302. This makes the airflow in the heat dissipation channel 305 closer to the fins 302 have higher heat, and the heat in the fins 302 is not easily dissipated into the heat dissipation channel 305.

[0100] In this application, by providing a bridging plate 304 on the fin 302, the bridging plate 304 extends into the heat dissipation channel 305, creating a turbulent effect on the airflow flowing along the heat dissipation channel 305, disrupting the continuity of the thermal boundary layer, that is, disrupting the heat stratification of the airflow, making the heat distribution in the airflow more uniform, reducing the temperature of the airflow near the fin 302, and improving the heat exchange capacity between the fin 302 and the airflow in the heat dissipation channel 305. Furthermore, the bridging plate 304 increases the surface area of ​​the heat sink 300, thereby increasing the Nusselt number by changing the channel shape and increasing the heat exchange area, which in turn significantly improves the heat transfer coefficient of the heat sink 300 surface, enhances the heat dissipation capacity, effectively reduces the temperature of the power device 200, and enables the power device 200 to meet the requirements of higher temperature operating environments.

[0101] In this application, the bridge section 303 connects adjacent heat dissipation channels 305, further improving the smoothness of airflow. The airflow carrying heat can flow between the heat dissipation channels 305, so that each heat dissipation channel 305 can evenly distribute the dissipated heat, improving the overall heat dissipation uniformity of the radiator 300 and improving heat dissipation efficiency.

[0102] In this application, the height of the bridging plate 304 is set to account for 25% to 45% of the width of the heat dissipation channel 305. If the height-to-width ratio is too low, the bridging plate 304 will not effectively disrupt the airflow in the heat dissipation channel 305, thus failing to effectively break the continuity of the thermal boundary layer. If the height-to-width ratio is too high, the bridging plate 304 will excessively encroach on the heat dissipation channel 305, causing significant obstruction to the airflow within the channel. Therefore, this structural design sets a suitable height-to-width ratio to ensure effective disruption of the thermal boundary layer's continuity and to avoid the bridging plate 304 encroaching too much on the cross-section of the heat dissipation channel 305, preventing excessive obstruction of the airflow within the channel and ensuring smooth airflow within the channel, thereby enhancing the heat dissipation capacity.

[0103] In some embodiments, reference Figures 2 to 8 The two ends of the bridge plate 304 are respectively connected to the edges on both sides of the bridge section 303, so that the bridge plate 304 is connected to the fin 302 through two points.

[0104] The bridging plate 304 protrudes relative to the surface of the fin 302, forming a flow diversion channel 306 between the bridging plate 304 and the fin 302. That is, the space between the surface of the bridging plate 304 near the fin 302 and the bridging portion 303 serves as the flow diversion channel 306. The two edges of the bridging plate 304 are not connected to the fin 302 and have a gap between them, serving as openings at both ends of the flow diversion channel 306, allowing airflow to pass through the flow diversion channel 306 in a direction parallel to the surface of the fin 302.

[0105] The opening of the fin 302 reduces the strength of the fin 302 itself, and the single-sided connection of the bridge plate 304 causes uneven thermal expansion of the internal microstructure of the material, resulting in large thermal stress at the connection between the bridge plate 304 and the fin 302. That is, all the thermal stress is concentrated in one place, increasing the risk of thermal fatigue.

[0106] In this application, the two ends of the bridging plate 304 are connected to the bridging portion 303, so that the bridging plate 304 supports and reinforces the bridging portion 303, ensuring the strength of the fin 302 after the opening. On the other hand, compared with the bridging plate 304 being connected on one side, the thermal stress of the bridging plate 304 connected at both ends is distributed at the two connection points between the bridging plate 304 and the fin 302, avoiding thermal stress concentration and reducing the risk of thermal fatigue. In addition, the diversion channel 306 further optimizes the airflow distribution in the heat dissipation channel 305, so that part of the airflow flowing along the heat dissipation channel 305 passes through the diversion channel 306, carrying away the heat dissipated from both sides of the bridging plate 304, so that the airflow can flow more evenly across the surface of the fin 302 and the surface of the bridging plate 304 and dissipate into the airflow of the heat dissipation channel 305, improving the heat dissipation uniformity of the entire radiator 300. As the airflow passes through the diversion channel 306, it can form a guiding effect, drawing the airflow in the adjacent heat dissipation channel 305 into the bridging part 303, thereby enhancing the flow of air between the adjacent heat dissipation channels 305 and improving the overall heat dissipation uniformity of the radiator 300.

[0107] In some embodiments, reference Figures 2 to 7 The bridging plate 304 is bent in the middle, dividing it into two relatively bent parts, making the cross-section of the diversion channel 306 triangular. Compared to making the bridging plate 304 arc-shaped, this structural design gives the side of the bridging plate 304 away from the fins 302 an angular structure, which more effectively disturbs the airflow in the heat dissipation channel 305, thereby more significantly disrupting the continuity of the thermal boundary layer, improving heat dissipation efficiency, and while keeping the height of the bridging plate 304 constant, its length from one end to the other is shorter than that of an arc-shaped plate. This reduces the amount of material used.

[0108] refer to Figure 9When the bridging plate 304 is set to an arc shape, due to the smooth surface of the bridging plate 304, the airflow will flow along the surface of the fin 302 and the surface of the bridging plate 304. (Reference) Figure 10 When the middle part of the bridge plate 304 is bent so that the cross section of the diversion channel 306 is triangular, the airflow flowing along the wall of the fin 302 to the bridge plate 304 due to the angle on the surface of the bridge plate 304 can form vortices in the space of the diversion channel 306. This more effectively disturbs the airflow in the heat dissipation channel 305 on the side of the fin away from the bridge plate, thereby more significantly disrupting the continuity of the thermal boundary layer and improving heat dissipation efficiency. On the other hand, the vortex allows more airflow to pass through the bridge hole into another adjacent heat dissipation space, intensifying the flow of airflow between adjacent heat dissipation channels 305 and improving heat dissipation uniformity.

[0109] In addition, the triangular cross section formed by bending the middle of the bridging plate 304 distributes the thermal stress on the corners of the bridging plate 304 and at the connection points between the two bridging plates 304 and the fins 302, further dispersing the thermal stress, avoiding thermal stress concentration, and reducing the risk of thermal fatigue.

[0110] In some embodiments, reference Figures 2 to 5 Multiple bridge plates 304 are spaced apart along a direction away from the substrate 301. (Reference) Figure 6 Multiple bridging plates 304 are spaced apart along a second direction parallel to the surface of the fin 302. The second direction is parallel to the surface of the substrate 301 and is usually perpendicular to the first direction. More specifically, multiple bridging plates 304 are arranged in both the length and width of the fin 302, thus providing more bridging plates 304 in the limited area of ​​the fin 302.

[0111] This structural design increases the number of disturbances along the airflow path as it flows along the heat dissipation channel 305 through a multi-stage turbulence structure. This prevents the airflow from reforming into strata after disturbance, more effectively disrupting the continuity of the thermal boundary layer. This ensures a reduction in the airflow temperature near the fins 302, improves heat exchange between the fins 302 and the airflow, and thus enhances the overall heat dissipation performance of the heat sink 300. Furthermore, this structural design maximizes the heat dissipation area of ​​the heat sink 300 by incorporating more open-bridge plates 304 within a limited space, providing more space for heat dissipation and further reducing the temperature of the power device 200.

[0112] In some embodiments, in the second direction, adjacent bridging plates 304 are staggered, meaning that adjacent bridging plates 304 are offset along the length of the fin 302. This structural design allows the bridging plates 304 to be more evenly distributed on the surface of the fin 302, resulting in more uniform heat dissipation at different locations of the fin 302. This avoids the problem of poor local heat dissipation and improves the overall heat dissipation efficiency and reliability of the radiator 300. Furthermore, since the connections at both ends of the bridging plates 304 reinforce the bridging holes in the fin 302, the more evenly distributed bridging plates 304 can strengthen various locations of the fin 302, improving the stability of the fin 302 structure. This allows it to better resist airflow impact and vibration during the operation of the outdoor unit of the air conditioner, extending the service life of the radiator 300.

[0113] In some embodiments, reference Figures 2 to 5 In the second direction, multiple bridging plates 304 are located on the same straight line parallel to the second direction, so that the corresponding multiple diversion channels 306 are located on the same straight line. This structural design allows the airflow flowing along the heat dissipation channel 305 to smoothly pass through the multiple diversion channels 306 on the same straight line, thereby reducing the flow resistance of some airflows within the heat dissipation channel 305, increasing the overall flow velocity of the airflow within the heat dissipation channel 305, thereby accelerating the removal of heat and enhancing the heat dissipation effect.

[0114] In some embodiments, reference Figure 5 The bridging plates 304 all protrude in the same direction relative to the fins 302 they are connected to. This structural design ensures that each fin 302 has a bridging plate 304 on one side, and only one fin 302 has a bridging plate 304 in the same heat dissipation channel 305. This avoids the bridging plates 304 on both sides of the heat dissipation channel 305 extending into the heat dissipation channel 305, and avoids excessive bridging plates 304 in the heat dissipation channel 305, which would cause airflow obstruction. This maintains efficient airflow and removes heat, ensuring efficient heat dissipation.

[0115] In some embodiments, reference Figure 7 The width W of the bridge plate 304 in the direction away from the substrate 301 k With height H in the direction perpendicular to fin 302 k The ratio between them is B, where B ≥ 1.8 and B ≤ 2.2. This structural design defines the aspect ratio of the cross-section of the diversion channel 306, and the height H of the bridge plate 304 is... k With a heat dissipation channel width of 305 W s When the ratio B is between 0.25 and 0.45, the open bridge plate 304 has a larger width, increasing the surface area of ​​the open bridge plate 304, and the cross-section of the diversion channel 306 is not too flat, so as not to cause the airflow to pass through the diversion channel 306 to decrease, thereby improving the heat dissipation performance of the open bridge plate 304.

[0116] In some embodiments, reference Figure 7 The width of the bridge plate 304 in the direction away from the substrate 301 is W. k W k Greater than or equal to 7mm, and W k The diameter is less than or equal to 9mm. This structural design can improve the rationality of the external dimensions of the bridge plate 304 and the diversion channel 306 in practical applications, better utilize the heat dissipation function of the bridge plate 304, and ensure the stable operation of the radiator 300 in high-temperature environments.

[0117] By comparing an outdoor air conditioner unit using the existing radiator 300 with an outdoor air conditioner unit using the radiator 300 of this application, the temperature of the power device 200 is reduced by about 1.5%, and the heat transfer coefficient is increased by about 3%.

[0118] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An outdoor unit for an air conditioner, characterized in that, include: chassis; A heat exchanger is disposed within the casing; The heat exchanger is used to exchange heat with outdoor air; The compressor is housed within the casing; The compressor, together with the heat exchanger and evaporator, forms a refrigerant circulation loop. The compressor is used to compress low-pressure refrigerant gas into high-pressure refrigerant gas and drive the refrigerant to flow in the refrigerant circulation loop. A fan is disposed within the housing; the fan is used to drive air to contact the heat exchanger. The electronic control board is housed within the casing. The electronic control board is used to control the operating status of the compressor and the fan; The electronic control board is equipped with power devices; A heat sink is disposed on the power device; the heat sink includes: A substrate is attached to the surface of the power device; Fins are disposed on the substrate; multiple fins are sequentially spaced along a first direction to form heat dissipation channels between adjacent fins, and the first direction is parallel to the surface of the substrate; A bridging portion is provided on the fin to connect the two heat dissipation channels on both sides of the fin; A bridge plate is disposed on the fin and connects to the edge of the bridge portion; The ratio of the height of the bridging plate to the width of the heat dissipation channel in the direction perpendicular to the fin surface is S, where S≥0.25 and S≤0.

45.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The two ends of the bridging plate are respectively connected to the edges on both sides of the bridging section to form a flow diversion channel between the bridging plate and the fin.

3. The outdoor unit of the air conditioner according to claim 2, characterized in that, The middle part of the bridge plate is bent to make the cross-section of the diversion channel triangular.

4. The outdoor unit of the air conditioner according to claim 2, characterized in that, Multiple bridging plates are spaced apart along a direction away from the substrate; multiple bridging plates are spaced apart along a second direction, which is parallel to the fin surface and the substrate surface.

5. The outdoor unit of the air conditioner according to claim 4, characterized in that, The adjacent bridge plates are staggered in the second direction.

6. The outdoor unit of the air conditioner according to claim 4, characterized in that, The adjacent diversion channels in the second direction are located on the same straight line.

7. The outdoor unit of the air conditioner according to claim 1, characterized in that, The bridging plates all protrude in the same direction relative to the fins they are connected to.

8. The outdoor unit of the air conditioner according to claim 2, characterized in that, The ratio of the width of the bridging plate in the direction away from the substrate to its height in the direction perpendicular to the fin is B, where B ≥ 1.8 and B ≤ 2.

2.

9. The outdoor unit of the air conditioner according to claim 8, characterized in that, The width of the bridging plate in the direction away from the substrate is W. k W k Greater than or equal to 7mm, and W k Less than or equal to 9mm.

10. An outdoor unit for an air conditioner, characterized in that, include: chassis; A heat exchanger is disposed within the casing; The heat exchanger is used to exchange heat with outdoor air; The compressor is housed within the casing; The compressor, together with the heat exchanger and evaporator, forms a refrigerant circulation loop. The compressor is used to compress low-pressure refrigerant gas into high-pressure refrigerant gas and drive the refrigerant to flow in the refrigerant circulation loop. A fan is disposed within the housing; the fan is used to drive air to contact the heat exchanger. The electronic control board is housed within the casing. The electronic control board is used to control the operating status of the compressor and the fan; The electronic control board is equipped with power devices; A heat sink is disposed on the power device; the heat sink includes: A substrate is attached to the surface of the power device; Fins are disposed on the substrate; multiple fins are disposed sequentially at intervals to form heat dissipation channels between adjacent fins; An open-bridge structure is disposed on the fin; the open-bridge structure protrudes from the surface of the fin toward another adjacent fin and is used to connect the adjacent heat dissipation channels. The ratio of the height of the bridging structure to the width of the heat dissipation channel in the direction perpendicular to the fin surface is S, where S≥0.25 and S≤0.45.

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