Air conditioner outdoor unit

Abstract

The application relates to the technical field of household appliances, and discloses an outdoor unit of an air conditioner, which comprises a shell, a circuit board and a heat dissipation assembly arranged in the shell, the heat dissipation assembly is used for dissipating heat of the circuit board, the heat dissipation assembly comprises a heat dissipation piece, a first refrigerant pipe and a second refrigerant pipe, the heat dissipation piece is arranged on the circuit board, the heat dissipation piece has a first end and a second end which are oppositely arranged, the heat dissipation piece is made of a heat-conducting material, the heat dissipation piece has a plurality of heat dissipation channels which are arranged at intervals in a first direction, the heat dissipation piece is further provided with a first communication channel and a second communication channel, the first communication channel is arranged at the first end of the heat dissipation piece and is in communication with two adjacent heat dissipation channels, the second communication channel is arranged at the second end of the heat dissipation piece and is in communication with two adjacent heat dissipation channels, the first refrigerant pipe is located at the first end of the heat dissipation piece, and the second refrigerant pipe is located at the second end of the heat dissipation piece. The adjacent heat dissipation channels are communicated without an external pipeline, material is saved, and the first refrigerant pipe and the second refrigerant pipe can be arranged at the two ends of the heat dissipation piece, so that pipeline design is facilitated.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to an outdoor unit for an air conditioner. Background Technology

[0002] The field of home appliance technology encompasses a wide range of product categories, including but not limited to refrigerators, washing machines, air conditioners, microwave ovens, dishwashers, and vacuum cleaners. The technological development trends for these products primarily focus on intelligentization, energy conservation and environmental protection, optimized user experience, and the application of new materials. Optimized user experience is achieved through design innovation and functional enhancement to meet consumers' demands for health, convenience, and personalization.

[0003] As a complex temperature regulation device, the outdoor unit of an air conditioner operates in a relatively harsh environment. The control circuit board in the outdoor unit is the core control hub of the entire air conditioning system, controlling the operation of the compressor and fan assembly to achieve effective heat exchange. During this process, the circuit board needs to process a large number of signals and energy conversions, and contains many high-power components. These components generate a significant amount of heat when performing electrical energy conversion and motor drive. Poor heat dissipation on the circuit board can lead to a decline in component performance, potentially causing frequent compressor starts and stops, reduced cooling and heating efficiency, and malfunctioning fan assembly. This affects the efficiency and stability of the entire air conditioning system, and in severe cases, can damage the circuit board, rendering the air conditioner unusable. Utility Model Content

[0004] This application discloses an outdoor unit for an air conditioner, which uses a circuit board for heat dissipation. Two connecting channels are provided inside the heat dissipation component to connect the heat dissipation channels, eliminating the need for external piping to connect adjacent heat dissipation channels, thus saving materials. Furthermore, the first and second refrigerant pipes can be located at both ends of the heat dissipation component, facilitating piping design.

[0005] To achieve the above objectives, this application discloses an outdoor unit for an air conditioner, comprising: The housing contains: The compressor is used to compress refrigerant; A heat exchanger, connected to the compressor, is used for exchanging heat with outdoor air; Circuit board; A heat dissipation assembly for dissipating heat from the circuit board, the heat dissipation assembly comprising: A heat sink, connected to the circuit board, has a first end and a second end disposed opposite to each other, is made of a thermally conductive material, and has multiple heat dissipation channels spaced apart along a first direction inside the heat sink. The heat sink also includes: The first connecting channel is disposed at the first end of the heat sink and is connected to the two adjacent heat sink channels; The second connecting channel is disposed at the second end of the heat sink and is connected to the two adjacent heat sink channels; The first refrigerant pipe is located at the first end of the heat sink; The second refrigerant pipe is located at the second end of the heat sink; In cooling mode, refrigerant enters the heat exchanger from the first refrigerant pipe. The inlet of the first refrigerant pipe is connected to the outlet of the heat exchanger, and the outlet of the first refrigerant pipe is connected to the first connecting channel. The inlet of the second refrigerant pipe is connected to the second connecting channel, and the outlet of the second refrigerant pipe is configured to connect to the indoor unit of the air conditioner. In heating mode, refrigerant enters the heat exchanger from the second refrigerant pipe. The inlet of the first refrigerant pipe is connected to the first connecting channel, and the outlet of the first refrigerant pipe is connected to the outlet of the heat exchanger. The inlet of the second refrigerant pipe is configured to connect to the indoor unit of the air conditioner, and the outlet of the second refrigerant pipe is connected to the second connecting channel.

[0006] In this way, multiple heat dissipation channels are set inside the heat sink, and adjacent heat dissipation channels are connected in series through the first and second connecting channels to form a refrigerant circulation path. This avoids the need for external pipes to connect multiple heat dissipation channels in traditional heat dissipation systems, simplifies the layout of the heat dissipation system, and saves pipe materials. The first and second refrigerant pipes are respectively set at both ends of the heat sink (the first end and the second end), and are connected to the first and second connecting channels respectively, making the pipe layout more convenient and facilitating the connection of the first and second refrigerant pipes to other system components (such as heat exchangers), reducing the possibility of pipe crossing or interference.

[0007] As an optional implementation, the connection port between the first refrigerant pipe and the heat sink and the connection port between the second refrigerant pipe and the heat sink are respectively provided corresponding to the two outermost heat dissipation channels along the first direction.

[0008] Thus, if the first and second refrigerant pipes are connected to the two ends of the same heat dissipation channel, the refrigerant may flow directly from the first refrigerant pipe to the second, resulting in insufficient refrigerant flow in other heat dissipation channels and poor heat dissipation. Furthermore, if there are three or more heat dissipation channels, and the first or second refrigerant pipe is connected to a middle channel, the refrigerant may preferentially flow from the middle channel to the second refrigerant pipe, while the refrigerant flow in the outermost channels is slow or even stagnant. In this embodiment, the first refrigerant pipe is connected to the outermost heat dissipation channel, and the second refrigerant pipe is connected to the outermost heat dissipation channel on the other side, forcing the refrigerant to flow through all the middle channels, ensuring that each channel participates in heat dissipation.

[0009] As an optional implementation, the heat dissipation channel extends along a second direction, which is perpendicular to the first direction.

[0010] In this way, after the refrigerant enters through the first refrigerant pipe, it flows through the entire heat dissipation channel in a vertical direction (the second direction). This vertically aligned design ensures that the refrigerant fully contacts the heat dissipation surface as it flows within the channel, reducing eddies or stagnant areas and improving heat exchange efficiency. The heat dissipation channel can cover a larger area of ​​the circuit board, ensuring that heat is absorbed evenly. If the heat dissipation channel extends along the first direction, the refrigerant may concentrate in only a localized area, resulting in uneven heat dissipation.

[0011] As an optional implementation, the first connecting channel extends through a first end of the heat sink, and the second connecting channel extends through a second end of the heat sink; the heat dissipation assembly further includes: Two sealing components are respectively disposed at the ends of the first connecting channel away from the heat dissipation channel and the ends of the second connecting channel away from the heat dissipation channel, so as to seal the gap between the first refrigerant pipe and the heat dissipation component and the gap between the second refrigerant pipe and the heat dissipation component.

[0012] In this way, the end of the connecting channel is completely sealed by the sealing component, thus completely eliminating the risk of refrigerant leakage. If the connecting channel adopts a non-through design, the machining accuracy requirement is extremely high. If the connecting channel adopts a through design (the first and second ends are completely connected), the machining difficulty is reduced, and a reliable seal is achieved by the sealing component (such as a rubber plug, threaded plug, or welded seal).

[0013] As an optional implementation, the inner wall surface of the heat dissipation channel is provided with a plurality of heat dissipation teeth, which extend along the extension direction of the heat dissipation channel and are arranged at intervals along the circumference of the heat dissipation channel.

[0014] This effectively improves the heat dissipation efficiency of the circuit board. This structure increases the heat dissipation area of ​​the inner wall of the heat dissipation channel, enhances the heat exchange capacity between the refrigerant and the channel wall, effectively reduces the operating temperature of the circuit board, and the continuously extending heat dissipation teeth facilitate processing. In addition, the parameters of the heat dissipation teeth can be customized according to the characteristics of the refrigerant and the operating conditions, and can be optimized in conjunction with the air conditioning system.

[0015] As an optional implementation, there are two heat dissipation channels, and the plurality of heat dissipation channels include: The first heat dissipation channel is provided corresponding to the first refrigerant pipe, and the two ends of the first heat dissipation channel are respectively connected to the first connecting channel and the second connecting channel; The second heat dissipation channel is provided corresponding to the second refrigerant pipe, and the two ends of the second heat dissipation channel are respectively connected to the first connecting channel and the second connecting channel.

[0016] The advantage of this design lies in the unidirectional flow characteristic of the refrigerant. The low-temperature refrigerant introduced through the first refrigerant pipe can directly enter the first and second heat dissipation channels, complete heat exchange, and then be discharged through the second refrigerant pipe. This flow path avoids the problems of refrigerant backflow or turbulence, as well as the long flow path of serpentine flow paths, ensuring uniform temperature distribution and making the heat dissipation effect more consistent in all areas of the circuit board. In addition, the layout of the two heat dissipation channels simplifies the manufacturing process, which can be achieved through one-piece extrusion molding of aluminum alloy, without the need for complex internal flow guiding structures.

[0017] As an optional implementation, the heat dissipation channels are three in number, and the plurality of heat dissipation channels include: A first heat dissipation channel is provided corresponding to the first refrigerant pipe, with one end of the first heat dissipation channel connected to the first refrigerant pipe and the other end connected to the second connecting channel; The second heat dissipation channel is provided corresponding to the second refrigerant pipe, with one end of the second heat dissipation channel connected to the first connecting channel and the other end connected to the second connecting channel; A third heat dissipation channel is disposed between the first heat dissipation channel and the second heat dissipation channel along the first direction. One end of the third heat dissipation channel is connected to the first connecting channel, and the other end is connected to the second refrigerant pipe.

[0018] In this way, the three heat dissipation channels have a stronger heat dissipation capacity.

[0019] As an optional implementation, the heat dissipation assembly further includes: The first stop member is disposed in the first communicating channel and is located between the first heat dissipation channel and the third heat dissipation channel along the first direction; The second stop is disposed within the second communicating channel and is located between the second heat dissipation channel and the third heat dissipation channel along the first direction.

[0020] Thus, the three heat dissipation channels, along with the first and second stop components, construct a multi-path series flow pattern. The low-temperature refrigerant enters the first heat dissipation channel from the first refrigerant pipe, flows to the second connecting channel, and then enters the third heat dissipation channel. The refrigerant in the third heat dissipation channel then flows back into the first connecting channel and into the second heat dissipation channel, finally exiting through the second refrigerant pipe. This extends the residence time of the refrigerant within the heat sink, resulting in more thorough heat exchange. Furthermore, the precise positioning of the stop components precisely controls the refrigerant flow direction. Without adding external piping, flow path optimization is achieved through a simple internal structure, ensuring high-efficiency heat dissipation while maintaining structural compactness.

[0021] As an optional implementation, the aperture of the heat dissipation channel is 6mm to 12mm.

[0022] If the orifice diameter is less than 6mm, on the one hand, the excessively small orifice diameter will increase the refrigerant flow resistance, especially when the refrigerant contains trace impurities or undergoes local phase change, which can easily lead to blockage and affect the stability of the heat dissipation system. On the other hand, the excessively small orifice diameter will limit the refrigerant flow rate per unit time, resulting in insufficient heat exchange rate, making it difficult to match the heat dissipation requirements of the circuit board, and may even cause local overheating due to excessive refrigerant residence time. If the orifice diameter is greater than 12mm, the excessively large orifice diameter will increase the overall volume of the heat dissipation component, not only occupying more internal space of the casing, but also potentially leading to material waste due to structural redundancy, increasing costs. When the orifice diameter is in the range of 6~12mm, the orifice diameter in this range can ensure sufficient refrigerant flow, avoid excessive flow resistance, ensure smooth refrigerant circulation, and has better compatibility with the overall structure of the heat dissipation component. It is convenient to manufacture and can realize a multi-channel layout in a limited space, balancing heat dissipation performance and structural compactness, providing continuous and stable heat dissipation for the circuit board, and ensuring the reliable operation of the outdoor unit of the air conditioner.

[0023] As an optional implementation, the heat sink is provided with: A first mounting hole is provided, which penetrates the heat sink along a third direction and is perpendicular to both the first and second directions. The circuit board is equipped with: The second mounting hole corresponds to the position of the first mounting hole; The heat dissipation component also includes: Fasteners are inserted through the first mounting hole and the second mounting hole to connect the heat sink and the circuit board; The distance between the first mounting hole and the heat dissipation channel is greater than or equal to 2mm.

[0024] Thus, within this spacing range, mutual interference between the machining of mounting holes and the heat dissipation channels can be effectively avoided. The heat dissipation channels inside the heat sink need to carry refrigerant, and their inner walls must remain intact to prevent leakage. The first mounting hole, however, needs to be machined using processes such as drilling. If the two are too close, the drilling process may damage the wall of the heat dissipation channel (especially when the heat sink uses a thin-walled design), or excessively weaken the channel wall thickness, thereby increasing the risk of refrigerant leakage. By limiting the minimum spacing, the structural integrity of the heat dissipation channel can be ensured, while sufficient allowance is provided for the machining of the mounting hole, reducing the defect rate during production.

[0025] Compared with the prior art, the beneficial effects of this application are: The outdoor unit of the air conditioner provided in this application embodiment has multiple heat dissipation channels inside the heat sink. Adjacent heat dissipation channels are connected in series through a first connecting channel and a second connecting channel, forming a refrigerant circulation path. This avoids the need for external pipes to connect multiple heat dissipation channels in traditional heat dissipation systems, simplifying the system layout and saving piping materials. The first and second refrigerant pipes are respectively located at both ends of the heat sink (the first end and the second end), corresponding to and connected to the first and second connecting channels. This makes the piping layout more convenient and facilitates the connection of the first and second refrigerant pipes to other system components (such as the compressor), reducing the possibility of pipe crossing or interference. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a heat dissipation component in the prior art; Figure 2 This is a schematic diagram of the structure of the outdoor unit of an air conditioner disclosed in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the outdoor unit of an air conditioner disclosed in this application, omitting the front panel; Figure 4 This is a schematic diagram of the heat dissipation component disclosed in the embodiments of this application from a first-view perspective; Figure 5 This is a schematic diagram of the heat dissipation component disclosed in the embodiments of this application from a second perspective; Figure 6 for Figure 5 Sectional view at point AA; Figure 7 for Figure 5 Sectional view at point BB; Figure 8 This is a schematic diagram of the sealing component disclosed in the embodiments of this application; Figure 9 This is a schematic diagram of the structure of the heat sink disclosed in the embodiments of this application; Figure 10 This is a schematic diagram of the structure of a heat dissipation assembly with three heat dissipation channels disclosed in an embodiment of this application; Figure 11 This is another schematic diagram of a heat dissipation assembly with three heat dissipation channels disclosed in an embodiment of this application; Figure 12 for Figure 11 Sectional view at point CC.

[0028] Explanation of reference numerals in the attached figures: a- Connecting pipe; 100- Outdoor air conditioner unit; 1- Housing; 11- Front panel; 12- Partition; 1a- Heat exchange zone; 1b- Electrical control zone; 2- Compressor; 3- Fan assembly; 4- Circuit board; 5- Heat dissipation assembly; 51- Heat sink; 51a- First heat dissipation channel; 51b- Second heat dissipation channel; 51c- Third heat dissipation channel; 511- First connecting channel; 512- Second connecting channel; 513- Heat dissipation teeth; 514- First mounting hole; 52- First refrigerant pipe; 53- Second refrigerant pipe; 54- Sealing component; 54a- Clearance hole; 55- First stop component; 56- Second stop component; 57- Fastener; d1- Distance between the first mounting hole and the heat dissipation channel; d2- Depth of the sealing component extending into the heat sink; d3- Hole diameter; X- First direction; Y- Second direction. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0034] The field of home appliance technology encompasses a wide range of product categories, including but not limited to refrigerators, washing machines, air conditioners, microwave ovens, dishwashers, and vacuum cleaners. The technological development trends for these products primarily focus on intelligentization, energy conservation and environmental protection, optimized user experience, and the application of new materials. Optimized user experience is achieved through design innovation and functional enhancement to meet consumers' demands for health, convenience, and personalization.

[0035] As a complex temperature regulation device, the outdoor unit of an air conditioner operates in a relatively harsh environment. The control circuit board in the outdoor unit is the core control hub of the entire air conditioning system, controlling the operation of the compressor and fan assembly to achieve effective heat exchange. During this process, the circuit board needs to process a large number of signals and energy conversions, and contains many high-power components. These components generate a significant amount of heat when performing electrical energy conversion and motor drive. Poor heat dissipation on the circuit board can lead to a decline in component performance, potentially causing frequent compressor starts and stops, reduced cooling and heating efficiency, and malfunctioning fan assembly. This affects the efficiency and stability of the entire air conditioning system, and in severe cases, can damage the circuit board, rendering the air conditioner unusable.

[0036] To achieve the above objectives, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a heat dissipation component in the prior art. The heat dissipation component is attached to the circuit board, and the refrigerant inside the outdoor unit of the air conditioner is introduced into the heat dissipation component 5 to dissipate heat from the circuit board. Typically, the heat dissipation component 5 includes a heat sink 51, which has two heat dissipation channels running through both ends of the heat sink. The two heat dissipation channels are connected by an external "U-shaped" connecting pipe a. A first refrigerant pipe 52 and a second refrigerant pipe 53 are set at the same end of the heat sink 51. The first refrigerant pipe 52 and the second refrigerant pipe 53 are respectively connected to the two heat dissipation channels. In this way, the first refrigerant pipe 52 and the second refrigerant pipe 53 can only be located on the same side, which will cause interference between the two pipes, making the pipe design inconvenient. Moreover, the external "U-shaped" pipe results in the use of more pipes and higher costs.

[0037] Based on this, this application discloses an outdoor unit for an air conditioner, which uses a heat dissipation component for circuit board heat dissipation. Two connecting channels are provided inside the heat dissipation component to connect the heat dissipation channels, eliminating the need for external piping to connect adjacent heat dissipation channels, thus saving materials. Furthermore, the first refrigerant pipe and the second refrigerant pipe can be located at both ends of the heat dissipation component, which facilitates piping design.

[0038] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0039] Please see Figures 2 to 6 , Figure 2 This is a schematic diagram of the structure of the outdoor unit 100 of the air conditioner disclosed in the embodiments of this application. Figure 3 This is a schematic diagram of the air conditioner outdoor unit 100 disclosed in this application, omitting the front panel 11. Figure 4 This is a schematic diagram of the heat dissipation component 5 disclosed in the embodiments of this application from a first-view perspective. Figure 5 This is a schematic diagram of the heat dissipation component 5 disclosed in the embodiments of this application from a second perspective. Figure 6 for Figure 4 A cross-sectional view at point AA. This application discloses an outdoor unit 100 for an air conditioner. The outdoor unit 100 is one of the core components of the air conditioning system, mainly responsible for heat exchange and refrigerant circulation. The compressor 2 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas. The high-temperature, high-pressure refrigerant enters the condenser (heat exchanger) to exchange heat with the outdoor air, releasing heat and condensing into a high-pressure liquid refrigerant. The liquid refrigerant is depressurized through the expansion valve (or capillary tube) and then enters the indoor unit to evaporate and absorb heat. The operation of the outdoor unit directly affects the cooling / heating efficiency, energy consumption, and stability of the air conditioner.

[0040] The outdoor unit 100 of the air conditioner includes a casing 1, which includes a front panel 11. The casing 1 serves as the external structure to protect the internal components (compressor 2, heat exchanger, circuit board 4, etc.) and to provide an airflow channel. The casing 1 is provided with an air inlet and an air outlet. External air flows through the heat exchanger for heat exchange under the action of a fan.

[0041] In some embodiments, the outdoor unit 100 of the air conditioner includes a partition 12 disposed inside the housing 1, which divides the housing 1 cavity into a heat exchange zone 1a and an electrical control zone 1b.

[0042] In some embodiments, the outdoor unit 100 of the air conditioner further includes a compressor 2, which is disposed in the electronic control area 1b. The compressor 2 is used to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas to drive the refrigerant circulation. Specifically, a motor drives a piston or scroll structure to compress the refrigerant, increasing its temperature and pressure.

[0043] In some embodiments, the outdoor unit 100 of the air conditioner also includes a heat exchanger disposed in the heat exchange zone 1a and connected to the compressor 2. The heat exchanger is used to exchange heat between the refrigerant and the outdoor air.

[0044] In some embodiments, the outdoor unit 100 of the air conditioner also includes a fan assembly 3, which is disposed in the heat exchange zone 1a. The fan drives air to flow from the air inlet of the casing 1 through the heat exchanger (condenser) and exchange heat with the heat exchanger before being discharged to the outside from the air outlet of the casing 1, thus dissipating heat to the outside.

[0045] In some embodiments, the outdoor unit 100 of the air conditioner also includes a circuit board 4, which is located in the electrical control area 1b and is used to control the operation of components such as the compressor 2, the fan assembly 3, and the electronic expansion valve, and to monitor the system status (such as temperature and pressure). The power devices (such as IGBTs and MOSFETs) on the circuit board 4 generate a lot of heat when they are working, and efficient heat dissipation is required to avoid overheating damage. The area where these power devices are located is the power module.

[0046] In some embodiments, combined with Figure 3 and Figure 4 The outdoor unit 100 of the air conditioner also includes a heat dissipation component 5 for heat dissipation of the circuit board 4. The heat dissipation component 5 includes a heat sink 51 that is attached to the power module of the circuit board 4. The heat sink has a first end and a second end that are arranged opposite to each other. The heat sink 51 is made of a thermally conductive material. The heat sink 51 has multiple heat dissipation channels that are spaced apart along the first direction X. The heat dissipation channels are configured to allow refrigerant to be introduced to absorb the heat generated by the power module.

[0047] In some embodiments, combined with Figure 5 and Figure 6 The heat sink 51 has a first connecting channel 511 and a second connecting channel 512 inside. The first connecting channel 511 is located at the first end of the heat sink 51 and communicates with two adjacent heat dissipation channels. The second connecting channel 512 is located at the second end of the heat sink 51 and communicates with two adjacent heat dissipation channels. The heat dissipation assembly 5 also includes a first refrigerant pipe 52 and a second refrigerant pipe 53. The first refrigerant pipe 52 is located at the first end of the heat sink 51, and the second refrigerant pipe 53 is located at the second end of the heat sink 51. In cooling mode, refrigerant enters the heat sink 51 through the first refrigerant pipe 52. The inlet of the first refrigerant pipe 52 is connected to the outlet of the heat exchanger, and the outlet of the first refrigerant pipe 52 is connected to the first connecting channel 511. The inlet of the second refrigerant pipe is connected to the second connecting channel 512, and the outlet of the second refrigerant pipe is configured to connect to the indoor unit of the air conditioner. In heating mode, refrigerant enters the heat sink 51 through the second refrigerant pipe 53. The inlet of the first refrigerant pipe 52 is connected to the first connecting channel 511, and the outlet of the first refrigerant pipe 52 is connected to the outlet of the heat exchanger. The inlet of the second refrigerant pipe 53 is configured to connect to the indoor unit of the air conditioner, and the outlet of the second refrigerant pipe 53 is connected to the second connecting channel 512. For ease of explanation, the following embodiments will use the cooling mode as an example.

[0048] The first connecting channel 511 connects to two adjacent heat dissipation channels, and the second connecting channel 512 connects to two adjacent heat dissipation channels. When there are more than two heat dissipation channels, the first connecting channel 511 and the second connecting channel 512 may connect to two or more adjacent heat dissipation channels. Connecting to multiple adjacent heat dissipation channels can be understood as each two adjacent heat dissipation channels being connected.

[0049] In this way, the heat sink 51 has multiple heat dissipation channels inside, and adjacent heat dissipation channels are connected in series through the first connecting channel 511 and the second connecting channel 512 to form a refrigerant circulation path. This avoids the need for external pipes to connect multiple heat dissipation channels in traditional heat dissipation systems, simplifies the layout of the heat dissipation system, and saves pipe materials. The first refrigerant pipe 52 and the second refrigerant pipe 53 are respectively located at both ends (the first end and the second end) of the heat sink 51, and are connected to the first connecting channel 511 and the second connecting channel 512, making the pipe layout more convenient and facilitating the connection of the first refrigerant pipe 52 and the second refrigerant pipe 53 to other system components (such as the compressor 2), reducing the possibility of pipe crossing or interference.

[0050] In some embodiments, combined with Figure 6 The outlet of the first refrigerant pipe 52 and the inlet of the second refrigerant pipe 53 are respectively set to correspond to the two outermost heat dissipation channels along the first direction X.

[0051] If the first refrigerant pipe 52 and the second refrigerant pipe 53 are connected to the two ends of the same heat dissipation channel, the refrigerant may flow directly from the first refrigerant pipe 52 to the second refrigerant pipe 53, resulting in insufficient refrigerant flow in other heat dissipation channels and poor heat dissipation. Furthermore, if there are three or more heat dissipation channels, and the first refrigerant pipe 52 or the second refrigerant pipe 53 is connected to a middle channel, the refrigerant may preferentially flow from the middle channel to the second refrigerant pipe 53, while the refrigerant flow in the side channels is slow or even stagnant. In this embodiment, the first refrigerant pipe 52 is connected to the outermost heat dissipation channel, and the second refrigerant pipe 53 is connected to the outermost heat dissipation channel on the other side, forcing the refrigerant to flow through all the middle channels, ensuring that each channel participates in heat dissipation.

[0052] Taking two heat dissipation channels as an example, the refrigerant enters from the first refrigerant pipe 52, flows into the first heat dissipation channel 51a and the adjacent second heat dissipation channel 51b, and finally exits from the second refrigerant pipe 53 through the second connecting channel 512. Both channels are fully utilized and there is no flow waste.

[0053] In some embodiments, combined with Figure 6 The heat dissipation channel extends along the second direction Y, which is perpendicular to the first direction X.

[0054] After entering through the first refrigerant pipe 52, the refrigerant flows vertically (in the second direction Y) through the entire heat dissipation channel. This vertically aligned design ensures the refrigerant fully contacts the heat dissipation surface as it flows within the channel, reducing eddies or stagnant areas and improving heat exchange efficiency. The heat dissipation channel can cover a larger area of ​​the circuit board 4, ensuring uniform heat absorption. If the heat dissipation channel extended along the first direction X, the refrigerant might concentrate in only a localized area, leading to uneven heat dissipation.

[0055] The heat-generating components (such as power modules) on circuit board 4 are typically arranged in strips. The vertically extending heat dissipation channels align these components and directly cover the heat source. The vertical layout can adapt to the narrow space of the housing 1 and avoid interference with other components (such as compressor 2 and heat exchanger). In addition, the heat dissipation channels extend in a single direction (second direction Y), which facilitates processing and reduces production costs.

[0056] In some embodiments, combined with Figure 6 The first connecting channel 511 passes through the first end of the heat sink 51, and the second connecting channel 512 passes through the second end of the heat sink 51. The heat sink assembly 5 also includes two sealing members 54, which are respectively disposed at the ends of the first connecting channel 511 and the second connecting channel away from the heat sink, so as to seal the gap between the first refrigerant pipe 52 and the heat sink 51, as well as the gap between the second refrigerant pipe 53 and the heat sink 51.

[0057] Thus, the sealing element 54 achieves a complete seal at the end of the connecting channel, completely eliminating the risk of refrigerant leakage. If the connecting channel adopts a non-through design, the machining accuracy requirement is extremely high. If the connecting channel adopts a through design (the first end and the second end are completely connected), the machining difficulty is reduced, and a reliable seal is achieved through the sealing element 54 (such as a rubber plug, threaded plug, or welded seal).

[0058] Optionally, combined Figure 8 , Figure 8 This is a schematic diagram of the structure of the sealing member 54 disclosed in the embodiments of this application. Each sealing member 54 is provided with a clearance hole 54a. The two clearance holes 54a are respectively used to avoid the first refrigerant pipe 52 and the second refrigerant pipe 53, and the first refrigerant pipe 52 and the second refrigerant pipe 53 are connected to the hole wall of the clearance hole 54a.

[0059] Optionally, the sealing element 54 is made of a thermally conductive material. The thermally conductive sealing element 54 can conduct heat while sealing, ensuring the overall thermal conductivity of the heat sink 51 and ensuring that the end of the connecting channel can also effectively absorb heat.

[0060] Optionally, combined Figure 6 The depth d2 of the sealing component 54 extending into the heat sink component 51 is 5~8mm.

[0061] If the sealing element 54 extends to a depth of less than 5mm, its contact area with the inner wall of the heat sink 51 will be too small, resulting in a significant decrease in the connection strength between the two. In the vibrating environment of the outdoor unit 100 during long-term operation, or under the pressure impact generated by the refrigerant flowing in the connecting channel, the sealing element 54 is prone to loosening, displacement, or even falling off, leading to refrigerant leakage. Once the seal fails, it will not only reduce the heat dissipation efficiency of the heat sink 5 to the circuit board 4, but may also affect the overall cooling or heating performance of the air conditioner due to refrigerant leakage.

[0062] If the sealing component 54 extends deeper than 8mm, it will excessively occupy the space of the internal connecting channels (first connecting channel 511 and second connecting channel 512) of the heat sink 51, resulting in a significant reduction in the cross-sectional area of ​​the channels. The connecting channels are the critical paths for the refrigerant to flow between multiple heat dissipation channels. If the channels are too narrow, it will significantly increase the refrigerant flow resistance and reduce the refrigerant flow rate per unit time. This will not only weaken the heat exchange efficiency between the heat sink 51 and the circuit board 4 (insufficient refrigerant flow rate leads to untimely heat removal), but may also cause local eddies and turbulence due to the narrow channels, exacerbating refrigerant flow noise. In low-temperature environments, the slow flow rate may even cause local refrigerant stagnation and frost formation, further affecting the stability of the heat dissipation system.

[0063] When the depth is between 5 and 8 mm, it ensures sufficient contact depth and friction between the sealing component 54 and the heat sink 51, forming a stable connection structure that effectively resists vibration and pressure impact, ensuring a durable and reliable sealing effect. Simultaneously, it avoids excessive obstruction of the connecting channels, preserving sufficient channel cross-sectional area to ensure smooth refrigerant flow within the heat sink 51, allowing the refrigerant to flow efficiently through each heat dissipation channel and fully exchange heat with the circuit board 4. This depth range achieves a balance between connection strength and flow efficiency, reducing the risk of seal failure while ensuring the heat dissipation performance of the heat sink component 5, and improving the operational stability and service life of the circuit board 4 of the outdoor unit 100.

[0064] In some embodiments, combined with Figure 7 and Figure 9 , Figure 7 for Figure 4 Sectional view at point BB. Figure 9 This is a schematic diagram of the structure of the heat sink 51 disclosed in the embodiment of this application. The inner wall surface of the heat sink channel is provided with a plurality of heat sink teeth 513. The plurality of heat sink teeth 513 extend along the extension direction of the heat sink channel and are arranged at intervals along the circumference of the heat sink channel.

[0065] In this way, the heat dissipation efficiency of circuit board 4 is effectively improved. This structure increases the heat dissipation area of ​​the inner wall of the heat dissipation channel by 3-5 times, enhances the heat exchange capacity between the refrigerant and the channel wall, and effectively reduces the operating temperature of circuit board 4. The continuously extending heat dissipation teeth 513 are easy to process. In addition, the parameters of heat dissipation teeth 513 can be customized according to the refrigerant characteristics and operating conditions, and optimized in coordination with the air conditioning system.

[0066] In some embodiments, combined with Figure 6 and Figure 7 There are two heat dissipation channels, including a first heat dissipation channel 51a and a second heat dissipation channel 51b. The first heat dissipation channel 51a is set to correspond to the outlet of the first refrigerant pipe 52, and the two ends of the first heat dissipation channel 51a are respectively connected to the first connecting channel 511 and the second connecting channel 512. The second heat dissipation channel 51b is set to correspond to the inlet of the second refrigerant pipe 53, and the two ends of the second heat dissipation channel 51b are respectively connected to the first connecting channel 511 and the second connecting channel 512.

[0067] The advantage of this design lies in the unidirectional flow characteristic of the refrigerant. The low-temperature refrigerant introduced by the first refrigerant pipe 52 can directly enter the first heat dissipation channel 51a and the second heat dissipation channel 51b, and after completing heat exchange, it is discharged through the second refrigerant pipe 53. This flow path avoids the problems of refrigerant backflow or turbulence, as well as the long flow path of serpentine flow paths, ensuring uniform temperature distribution and making the heat dissipation effect of each area of ​​the circuit board 4 more consistent. In addition, the layout of the two heat dissipation channels simplifies the manufacturing process, which can be achieved by integral extrusion molding of aluminum alloy without the need for complex internal flow guiding structures.

[0068] In some embodiments, combined with Figures 10 to 12 , Figure 10 This is a schematic diagram of the structure of the heat dissipation assembly 5 with three heat dissipation channels disclosed in an embodiment of this application. Figure 11 This is a schematic diagram of another structure of the heat dissipation assembly 5 with three heat dissipation channels disclosed in an embodiment of this application. Figure 12 for Figure 10The cross-sectional view at point CC shows three heat dissipation channels: a first heat dissipation channel 51a, a second heat dissipation channel 51b, and a third heat dissipation channel 51c. The first heat dissipation channel 51a is positioned corresponding to the outlet of the first refrigerant pipe 52, with one end connected to the first refrigerant pipe 52 and the other end connected to the second connecting channel 512. The second heat dissipation channel 51b is positioned corresponding to the inlet of the second refrigerant pipe 53, with one end connected to the first connecting channel 511 and the other end connected to the second connecting channel 512. The third heat dissipation channel 51c is positioned along the first direction X between the first heat dissipation channel 51a and the second heat dissipation channel 51b, with one end connected to the first connecting channel 511 and the other end connected to the second refrigerant pipe 53. These three heat dissipation channels provide stronger heat dissipation capabilities.

[0069] In some embodiments, combined with Figure 12 The heat dissipation assembly 5 also includes a first stop 55 and a second stop 56. The first stop 55 is disposed in the first connecting channel 511 and is located between the first heat dissipation channel 51a and the third heat dissipation channel 51c along the first direction X. The second stop 56 is disposed in the second connecting channel 512 and is located between the second heat dissipation channel 51b and the third heat dissipation channel 51c along the first direction X.

[0070] The three heat dissipation channels, along with the first stop 55 and the second stop 56, form a multi-path series flow pattern. The low-temperature refrigerant enters the first heat dissipation channel 51a from the first refrigerant pipe 52, then flows to the second connecting channel 512 and enters the third heat dissipation channel 51c. The refrigerant in the third heat dissipation channel 51c then flows into the first connecting channel 511 and enters the second heat dissipation channel 51b, finally exiting through the second refrigerant pipe 53. This prolongs the residence time of the refrigerant within the heat sink 51, resulting in more thorough heat exchange. Furthermore, the precise positioning of the stop components controls the refrigerant flow direction. Without adding external piping, flow path optimization is achieved through a simple internal structure, ensuring high-efficiency heat dissipation while maintaining structural compactness.

[0071] It is understandable that when there are four heat dissipation channels, these channels include a first heat dissipation channel 51a, a second heat dissipation channel 51b, a third heat dissipation channel 51c, and a fourth heat dissipation channel arranged sequentially along the first direction X. The first heat dissipation channel 51a corresponds to the first refrigerant pipe 52, and the fourth heat dissipation channel corresponds to the second refrigerant pipe 53. A first stop 55 can be installed in the first connecting channel 511, positioned between the first and second heat dissipation channels 51a and 51b. A second stop 56 can be installed in the second connecting channel 512, positioned between the third and fourth heat dissipation channels 51c. This allows the refrigerant to flow into the first heat dissipation channel 51a, enter the second connecting channel 512, and simultaneously enter the second and third heat dissipation channels 51b and 51c. After converging in the first connecting channel 511, it flows into the fourth heat dissipation channel and finally into the second refrigerant pipe 53.

[0072] It should be noted that the configuration of the heat sink 51 with an odd number of heat dissipation channels is the same as that of the heat sink 51 with three heat dissipation channels, and the configuration of the heat sink 51 with an even number of heat dissipation channels is the same as that of the heat sink 51 with four heat dissipation channels, which will not be repeated here.

[0073] In some embodiments, combined with Figure 9 The diameter d3 of the heat dissipation channel is 6~12mm.

[0074] If the aperture d3 is less than 6mm, on the one hand, an excessively small aperture d3 will increase the resistance to refrigerant flow, especially when the refrigerant contains trace impurities or undergoes local phase change, which can easily lead to blockage and affect the stability of the heat dissipation system; on the other hand, an excessively small aperture d3 will limit the refrigerant flow per unit time, resulting in insufficient heat exchange rate, making it difficult to match the heat dissipation requirements of circuit board 4, and may even cause local overheating due to excessive refrigerant residence time.

[0075] If the aperture d3 is greater than 12mm, the excessively large aperture d3 will increase the overall volume of the heat sink 51, not only occupying more internal space of the casing 1, but also potentially leading to material waste and increased costs due to structural redundancy.

[0076] When the aperture d3 is in the range of 6~12mm, the aperture d3 in this range can not only ensure sufficient refrigerant flow and avoid excessive flow resistance, ensuring smooth refrigerant circulation, but also has better compatibility with the overall structure of the heat sink 51. It can be convenient to process and can realize a multi-channel layout in a limited space, taking into account both heat dissipation performance and structural compactness, providing continuous and stable heat dissipation for the circuit board 4, and ensuring the reliable operation of the outdoor unit 100 of the air conditioner.

[0077] In some embodiments, combined with Figures 4 to 6The heat sink 51 is provided with a first mounting hole 514, which passes through the heat sink 51 along a third direction, and the third direction is perpendicular to the first direction X and the second direction Y. The circuit board 4 is provided with a second mounting hole, which corresponds to the position of the first mounting hole 514. The heat dissipation assembly 5 also includes a fastener 57, which passes through the first mounting hole 514 and the second mounting hole to connect the heat sink 51 and the circuit board 4. The distance d1 between the first mounting hole 514 and the heat dissipation channel is greater than or equal to 2mm.

[0078] Within this spacing range, mutual interference between the machining of mounting holes and the heat dissipation channels can be effectively avoided. The heat dissipation channels inside the heat sink 51 need to circulate refrigerant, and their inner walls must remain intact to prevent leakage. The first mounting hole 514, however, needs to be machined using processes such as drilling. If the two are too close, the wall of the heat dissipation channel may be damaged during drilling (especially when the heat sink 51 uses a thin-walled design), or the channel wall thickness may be excessively reduced, leading to a risk of refrigerant leakage. By limiting the minimum spacing, the structural integrity of the heat dissipation channel can be ensured, while sufficient allowance is provided for the machining of the mounting holes, reducing the defect rate during production.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An outdoor unit for an air conditioner, characterized in that, include: The housing contains: The compressor is used to compress refrigerant; A heat exchanger, connected to the compressor, is used for exchanging heat with outdoor air; Circuit board; A heat dissipation assembly for dissipating heat from the circuit board, the heat dissipation assembly comprising: A heat sink, connected to the circuit board, has a first end and a second end disposed opposite to each other, is made of a thermally conductive material, and has multiple heat dissipation channels spaced apart along a first direction inside the heat sink. The heat sink also includes: The first connecting channel is disposed at the first end of the heat sink and is connected to the two adjacent heat sink channels; The second connecting channel is disposed at the second end of the heat sink and is connected to the two adjacent heat sink channels; The first refrigerant pipe is located at the first end of the heat sink; The second refrigerant pipe is located at the second end of the heat sink; In cooling mode, refrigerant enters the heat exchanger from the first refrigerant pipe. The inlet of the first refrigerant pipe is connected to the outlet of the heat exchanger, and the outlet of the first refrigerant pipe is connected to the first connecting channel. The inlet of the second refrigerant pipe is connected to the second connecting channel, and the outlet of the second refrigerant pipe is configured to connect to the indoor unit of the air conditioner. In heating mode, refrigerant enters the heat dissipation component through the second refrigerant pipe. The inlet of the first refrigerant pipe is connected to the first connecting channel, and the outlet of the first refrigerant pipe is connected to the outlet of the heat exchanger. The inlet of the second refrigerant pipe is configured to connect to the indoor unit of the air conditioner, and the outlet of the second refrigerant pipe is connected to the second connecting channel.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The connection ports of the first refrigerant pipe and the heat sink and the connection ports of the second refrigerant pipe and the heat sink are respectively provided corresponding to the two outermost heat dissipation channels along the first direction.

3. The outdoor unit of the air conditioner according to claim 1, characterized in that, The heat dissipation channel extends along a second direction, which is perpendicular to the first direction.

4. The outdoor unit of the air conditioner according to claim 1, characterized in that, The first connecting channel passes through a first end of the heat sink, and the second connecting channel passes through a second end of the heat sink. The heat dissipation assembly further includes: Two sealing components are respectively disposed at the ends of the first connecting channel away from the heat dissipation channel and the ends of the second connecting channel away from the heat dissipation channel, so as to seal the gap between the first refrigerant pipe and the heat dissipation component and the gap between the second refrigerant pipe and the heat dissipation component.

5. The outdoor unit of the air conditioner according to claim 1, characterized in that, The inner wall surface of the heat dissipation channel is provided with a plurality of heat dissipation teeth, which extend along the extension direction of the heat dissipation channel and are arranged at intervals along the circumference of the heat dissipation channel.

6. The outdoor unit of the air conditioner according to any one of claims 2-5, characterized in that, The heat dissipation channel is two, and the plurality of heat dissipation channels include: The first heat dissipation channel is provided corresponding to the first refrigerant pipe, and the two ends of the first heat dissipation channel are respectively connected to the first connecting channel and the second connecting channel; The second heat dissipation channel is provided corresponding to the second refrigerant pipe, and the two ends of the second heat dissipation channel are respectively connected to the first connecting channel and the second connecting channel.

7. The outdoor unit of the air conditioner according to any one of claims 2-5, characterized in that, The heat dissipation channel is three in number, and the plurality of heat dissipation channels include: A first heat dissipation channel is provided corresponding to the first refrigerant pipe, with one end of the first heat dissipation channel connected to the first refrigerant pipe and the other end connected to the second connecting channel; The second heat dissipation channel is provided corresponding to the second refrigerant pipe, with one end of the second heat dissipation channel connected to the first connecting channel and the other end connected to the second connecting channel; A third heat dissipation channel is disposed between the first heat dissipation channel and the second heat dissipation channel along the first direction. One end of the third heat dissipation channel is connected to the first connecting channel, and the other end is connected to the second refrigerant pipe.

8. The outdoor unit of the air conditioner according to claim 7, characterized in that, The heat dissipation component also includes: The first stop member is disposed in the first communicating channel and is located between the first heat dissipation channel and the third heat dissipation channel along the first direction; The second stop is disposed within the second communicating channel and is located between the second heat dissipation channel and the third heat dissipation channel along the first direction.

9. The outdoor unit of the air conditioner according to any one of claims 1-5, characterized in that, The diameter of the heat dissipation channel is 6mm~12mm.

10. The outdoor unit of an air conditioner according to any one of claims 1-5, characterized in that, The heat dissipation channel extends along a second direction, which is perpendicular to the first direction. The heat dissipation component is provided with: A first mounting hole is provided, which penetrates the heat sink along a third direction and is perpendicular to both the first and second directions. The circuit board is equipped with: The second mounting hole corresponds to the position of the first mounting hole; The heat dissipation component also includes: Fasteners are inserted through the first mounting hole and the second mounting hole to connect the heat sink and the circuit board; The distance between the first mounting hole and the heat dissipation channel is greater than or equal to 2mm.

Images