Air conditioner outdoor unit

Abstract

This utility model discloses an outdoor unit for an air conditioner, comprising: a casing; a partition; a compressor; a heat exchange component; an outdoor fan; and an electrical control box. The electrical control box includes: a control box body; a circuit board; a power module; a refrigerant radiator connected to the heat exchange component, used to dissipate heat from the power module; and a heat dissipation substrate disposed within the control box body and located on the side of the refrigerant radiator closest to the circuit board, used for heat conduction between the power module and the refrigerant radiator. The heat dissipation substrate includes: an insulating main board with a heat dissipation area corresponding to the power module; and a heat dissipation component, which is a sheet metal component disposed on the insulating main board and located within the heat dissipation area. Therefore, by designing this outdoor unit, material consumption of the heat dissipation component can be reduced while ensuring heat dissipation effect, and the creepage distance problem can be solved, thereby improving economy and safety.

Description

Technical Field

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

[0002] The power modules (such as chips and electrolytic capacitors) on the PCB board inside the electrical box of an air conditioner need effective heat dissipation. Poor heat dissipation will affect the lifespan of the entire air conditioning system.

[0003] In related technologies, the published heat dissipation substrate design for electrical boxes in the industry adopts an all-aluminum substrate solution. This solution requires extrusion and automated programming lathe processing, resulting in a complex manufacturing process. Furthermore, the heat dissipation substrate is relatively large, consuming a significant amount of aluminum and thus incurring high costs. Therefore, designing an electrical box that can meet heat dissipation requirements while reducing manufacturing costs is essential. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide an outdoor unit for an air conditioner that can reduce material consumption of heat dissipation components while ensuring heat dissipation performance, and also solve the creepage distance problem.

[0005] An outdoor unit of an air conditioner according to a first aspect of this utility model includes: a casing, wherein an installation cavity is defined inside the casing, and an air inlet and an air outlet are formed on the casing; a heat exchange assembly disposed within a fan cavity, wherein a refrigerant flows within the heat exchange assembly, and the heat exchange assembly is used to exchange heat between the refrigerant and the outside air; an outdoor fan, wherein the outdoor fan is used to introduce airflow from outside the casing into the fan cavity through the air inlet, and after heat exchange by the heat exchange assembly, output it to the outside through the air outlet; and an electrical control box disposed within the installation cavity; the electrical control box includes: an electrical control box body; a circuit board disposed within the electrical control box body; and a power module. The circuit board includes: a power module mounted on the circuit board; a refrigerant radiator connected to the heat exchange assembly and disposed within the electrical control box, used to dissipate heat from the power module; and a heat dissipation substrate disposed within the electrical control box and located on the side of the refrigerant radiator closest to the circuit board, used for heat conduction between the power module and the refrigerant radiator. The heat dissipation substrate includes: an insulating main board with a heat dissipation area corresponding to the power module; and a heat dissipation component, which is a sheet metal component disposed on the insulating main board and located within the heat dissipation area.

[0006] In some examples of this utility model, the surface of the insulating motherboard near the refrigerant radiator is flush with the surface of the heat sink near the refrigerant radiator; and / or the surface of the insulating motherboard near the circuit board is flush with the surface of the heat sink near the circuit board.

[0007] In some examples of this utility model, there are multiple heat sinks, which are spaced apart along the length of the insulating motherboard and projected in the horizontal direction. The total projected area of ​​the multiple heat sinks is not less than half of the projected area of ​​the insulating motherboard.

[0008] In some examples of this utility model, the insulating motherboard is an integrally formed insulating nylon part; and / or the heat sink is constructed of an aluminum plate.

[0009] In some examples of this utility model, the outdoor unit of the air conditioner further includes: a refrigerant bracket, which is disposed within the electrical control box. The refrigerant bracket is located on one side of the circuit board and adjacent to the power module. The refrigerant bracket is provided with the refrigerant radiator and the heat dissipation substrate. The top wall of the electrical control box is provided with a first mounting hole, the heat dissipation substrate is provided with a second mounting hole, and the refrigerant bracket is provided with a third mounting hole. The outdoor unit of the air conditioner further includes: a fastener, which passes through the first mounting hole, the second mounting hole, and the third mounting hole, so that the heat dissipation substrate and the refrigerant bracket clamp the refrigerant radiator.

[0010] In some examples of this utility model, the refrigerant radiator is constructed in the shape of a plate, and a plurality of heat dissipation channels are formed inside the refrigerant radiator, extending along its length direction and spaced apart along its width direction.

[0011] In some examples of this utility model, the outdoor unit of the air conditioner further includes: a component bracket, which is disposed between the heat dissipation substrate and the circuit board. The component bracket is used to support the power module. The component bracket has an air outlet end close to the outdoor fan and an air inlet end away from the outdoor fan. The air inlet end of the component bracket forms an air inlet gap with the heat dissipation substrate, and the air outlet end forms an air outlet gap with the heat dissipation substrate. The component bracket, the circuit board, the power module, and the heat dissipation substrate together define an air outlet path, which connects the air inlet gap and the air outlet gap.

[0012] An outdoor unit of an air conditioner according to a second aspect of this utility model includes: a casing, the casing defining an installation cavity, and an air inlet and an air outlet formed on the casing; a partition, disposed within the casing and dividing the installation cavity into a compressor cavity and a fan cavity; a compressor, disposed within the compressor cavity; a heat exchange assembly, disposed within the fan cavity, the heat exchange assembly containing flowing refrigerant, the heat exchange assembly being used to exchange heat between the refrigerant and outside air; an outdoor fan, disposed within the fan cavity, the outdoor fan being used to introduce airflow from outside the casing into the fan cavity through the air inlet, and after heat exchange by the heat exchange assembly, output it outward through the air outlet; and an electrical control box, disposed within the installation cavity; the electrical control box includes: an electrical control box body; a circuit board, disposed within the electrical control box body; a power module, disposed within the circuit board; and a refrigerant radiator. The refrigerant radiator is connected to the heat exchange component and is disposed within the electrical control box. The refrigerant radiator is used to dissipate heat for the power module. A heat dissipation substrate is disposed within the electrical control box and located on the side of the refrigerant radiator closer to the circuit board. The heat dissipation substrate is used to conduct heat between the power module and the refrigerant radiator. A component bracket is disposed between the heat dissipation substrate and the circuit board. The component bracket is used to support the power module and has an air outlet end close to the outdoor fan and an air inlet end away from the outdoor fan. An air inlet gap is formed between the air inlet end of the component bracket and the heat dissipation substrate, and an air outlet gap is formed between the air outlet end and the heat dissipation substrate. The component bracket, the circuit board, the power module, and the heat dissipation substrate together define an air outlet path, which connects the air inlet gap and the air outlet gap.

[0013] In some examples of this utility model, the height of the air inlet gap is H1, where H1 satisfies the relationship H1≤1.5mm; and / or the height of the air outlet gap is H2, where H2 satisfies the relationship H2≤1.5mm.

[0014] In some examples of this utility model, the heat dissipation substrate includes: an insulating main board, the insulating main board having a heat dissipation area corresponding to the power module; and a heat dissipation component, the heat dissipation component being a sheet metal component, the heat dissipation component being disposed on the insulating main board and located in the heat dissipation area.

[0015] 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

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a structural schematic diagram of the outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0019] Figure 3 This is a partial structural schematic diagram of the outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0020] Figure 4 This is a partial structural schematic diagram of the outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0021] Figure 5 This is an exploded view of a portion of the structure of the outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0022] Figure 6 This is a structural schematic diagram of the electrical control box according to an embodiment of the present utility model;

[0023] Figure 7 This is an exploded view of the electrical control box according to an embodiment of the present utility model;

[0024] Figure 8 This is an assembly diagram of the component bracket, heat sink bracket, refrigerant radiator and refrigerant bracket according to an embodiment of the present utility model;

[0025] Figure 9 This is an exploded view of the component bracket, heat sink bracket, refrigerant radiator, and refrigerant bracket according to an embodiment of the present utility model;

[0026] Figure 10 This is a partial structural schematic diagram of the electrical control box according to an embodiment of the present utility model;

[0027] Figure 11 This is an exploded view of the heat dissipation substrate and the refrigerant radiator according to an embodiment of the present utility model;

[0028] Figure 12 This is an exploded view of the heat dissipation substrate according to an embodiment of the present utility model;

[0029] Figure 13 This is an exploded view of a refrigerant radiator according to an embodiment of the present invention;

[0030] Figure 14 yes Figure 13 Enlarged view of region A in the middle;

[0031] Figure 15 This is a cross-sectional view of a refrigerant radiator according to an embodiment of the present invention;

[0032] Figure 16 This is an exploded view of the circuit board, heat dissipation substrate, and refrigerant radiator according to an embodiment of the present utility model;

[0033] Figure 17 This is a side view of the electrical control box according to an embodiment of the present utility model.

[0034] Figure label:

[0035] 100. Outdoor unit of air conditioner;

[0036] 1. Housing; 11. Mounting cavity; 111. Compressor cavity; 112. Fan cavity; 12. Air inlet; 13. Air outlet;

[0037] 2. Partition; 3. Compressor; 4. Heat exchange components; 5. Outdoor fan;

[0038] 6. Electrical control box; 61. Electrical control box body; 611. First mounting hole; 62. Circuit board; 621. Chip; 63. Power module;

[0039] 7. Refrigerant bracket; 71. Third mounting hole;

[0040] 8. Refrigerant radiator; 81. Heat dissipation channel; 82. Heat dissipation main board; 83. First end plate; 831. Refrigerant inlet; 832. Refrigerant outlet; 84. Second end plate;

[0041] 9. Heat dissipation base plate; 91. Insulating main board; 911. Heat dissipation area; 92. Heat sink; 93. Second mounting hole;

[0042] 94. Component bracket; 941. Air outlet; 942. Air inlet; 943. Air inlet gap. Detailed Implementation

[0043] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0044] The following is for reference. Figures 1-17 The outdoor unit 100 of the air conditioner according to the present utility model can reduce the material consumption of the heat sink 92 while ensuring heat dissipation effect, and can also solve the creepage distance problem.

[0045] Combination Figures 1-17 As shown, the outdoor unit 100 of the air conditioner according to the first aspect of the present invention includes a casing 1, a partition 2, a compressor 3, a heat exchange assembly 4, an outdoor fan 5, and an electrical control box 6.

[0046] The indoor and outdoor units 100 of the air conditioner are connected by pipes to transfer refrigerant. The indoor unit includes an indoor heat exchanger and an indoor fan. The outdoor unit 100 includes a compressor 3, a four-way valve, a heat exchange assembly 4 (outdoor heat exchanger), an outdoor fan 5, and a throttling device. The compressor 3, outdoor heat exchanger, throttling device, and indoor heat exchanger, connected in sequence, form a refrigerant circuit. The refrigerant circulates in the refrigerant circuit and exchanges heat with the air through the outdoor and indoor heat exchangers to achieve either the cooling or heating mode of the air conditioner.

[0047] Compressor 3 is configured to compress the refrigerant so that the low-pressure refrigerant is compressed to form a high-pressure refrigerant.

[0048] The outdoor heat exchanger is configured to exchange heat between outdoor air and refrigerant transported within it. For example, in the cooling mode of the air conditioner, the outdoor heat exchanger operates as a condenser, causing the refrigerant compressed by the compressor 3 to dissipate heat to the outdoor air and condense. In the heating mode of the air conditioner, the outdoor heat exchanger operates as an evaporator, causing the depressurized refrigerant to absorb heat from the outdoor air and evaporate.

[0049] The outdoor fan 5 is configured to draw outdoor air into the outdoor unit 100 through the air inlet 12 and discharge the outdoor air, after heat exchange with the outdoor heat exchanger, through the air outlet 13 of the outdoor unit 100. The outdoor fan 5 provides power for the flow of outdoor air.

[0050] A throttling device is connected between the outdoor and indoor heat exchangers. The opening degree of the throttling device regulates the refrigerant pressure flowing through both heat exchangers, thereby regulating the refrigerant flow rate between them. The flow rate and pressure of the refrigerant flowing between the outdoor and indoor heat exchangers affect their heat exchange performance. The throttling device can be an electronic valve. The opening degree of the electronic expansion valve is adjustable to control the refrigerant flow rate and pressure passing through it.

[0051] A four-way valve is connected to the refrigerant circuit and is configured to switch the flow direction of the refrigerant in the refrigerant circuit so that the air conditioner can perform cooling mode or heating mode.

[0052] The indoor heat exchanger is configured to exchange heat between indoor air and refrigerant transported within it. For example, in the cooling mode of the air conditioner, the indoor heat exchanger operates as an evaporator, causing the refrigerant, after dissipating heat from the outdoor heat exchanger, to absorb heat from the indoor air and evaporate. In the heating mode of the air conditioner, the indoor heat exchanger operates as a condenser, causing the refrigerant, after absorbing heat from the outdoor heat exchanger, to dissipate heat to the indoor air and condense.

[0053] The air conditioner also includes a control unit. The control unit is configured to control the operating frequency of the compressor 3, the opening degree of the expansion valve, the speed of the outdoor fan 5, and the speed of the indoor fan. The control unit is connected to the compressor 3, the throttling device, the outdoor fan 5, and the indoor fan via data cables to transmit communication information.

[0054] The housing 1 defines an installation cavity 11, and the housing 1 has an air inlet 12 and an air outlet 13.

[0055] Specifically, the airflow flows through the air inlet 12 and air outlet 13 on the casing 1, realizing air circulation between the outdoor airflow and the outdoor unit 100 of the air conditioner. The outdoor fan 5 can drive the external airflow to enter the outdoor unit 100 of the air conditioner from the air inlet 12. The heat exchange component 4 exchanges heat with the external airflow entering from the air inlet 12. The heat exchange airflow formed is then blown to the outside from the air outlet 13 under the drive of the outdoor fan 5, thereby exchanging the heat inside the outdoor unit 100 of the air conditioner with the outside, and meeting the user's demand for ambient temperature.

[0056] The partition 2 is installed inside the housing 1, and the partition 2 divides the mounting cavity 11 into a compressor cavity 111 and a fan cavity 112. The compressor 3 is installed in the compressor cavity 111, and the outdoor fan 5 is installed in the fan cavity 112.

[0057] Specifically, the partition 2 can separate the mounting cavity 11 inside the housing 1. This facilitates the effective differentiation of the installation positions of the compressor 3 and the outdoor fan 5 within the housing 1, improving the neatness of the layout. On the other hand, it can also prevent water droplets on the outdoor fan 5 from being splashed onto the compressor 3 and circuit components inside the compressor cavity 111 when the outdoor fan 5 is running, thereby reducing the safety risks of electrical appliances.

[0058] Furthermore, the heat exchange component 4 is installed inside the fan cavity 112. The heat exchange component 4 contains flowing refrigerant and is used to exchange heat between the refrigerant and the outside air. This allows the airflow outside the casing 1 to enter the fan cavity 112 under the negative pressure of the outdoor fan 5. The airflow then directly passes through the heat exchange component 4 and exchanges heat with the continuously flowing refrigerant inside the heat exchange component 4 before being blown out to the outside of the casing 1. This helps to ensure that the outdoor unit 100 of the air conditioner can smoothly achieve the heat exchange effect of the airflow.

[0059] The outdoor fan 5 is used to introduce the airflow outside the casing 1 into the fan cavity 112 through the air inlet 12, and after heat exchange through the heat exchange component 4, it is output to the outside through the air outlet 13.

[0060] Specifically, the rotation of the outdoor fan 5 can generate negative pressure on the air outside the casing 1 through the air inlet 12, thereby driving the air outside the casing 1 into the fan cavity 112 under the action of air pressure. The airflow entering the fan cavity 112 exchanges heat with the heat exchange component 4 inside the fan cavity 112. The heat-exchanged airflow is then output to the outside of the casing 1 through the air outlet 13. In this way, the effect of heat exchange between the refrigerant in the heat exchange component 4 and the outdoor air can be achieved.

[0061] The electrical control box 6 is disposed in the mounting cavity 11. The electrical control box 6 includes an electrical control box body 61, a circuit board 62, a power module 63, a refrigerant radiator 8, and a heat dissipation substrate 9.

[0062] Specifically, circuit board 62 forms a complete circuit system by electrically connecting electronic components (such as resistors, capacitors, transistors, integrated circuits, etc.) according to a pre-designed circuit diagram layout. For example, circuit board 62 can be electrically connected to outdoor fan 5 and compressor 3 respectively.

[0063] Furthermore, the electrical control box 61 can protect the internal structure, and the circuit board 62 can send different control commands to the outdoor fan 5 and compressor 3 in the form of electrical signals, thereby improving the sensitivity and accuracy of the outdoor fan 5 and compressor 3 in executing the working commands.

[0064] The power module 63 (such as an electrolytic capacitor or chip 621, which are electronic components that easily dissipate a lot of heat) is placed on the circuit board 62. This arrangement can ensure more reliable signal transmission between the power module 63 and the control circuit on the circuit board 62, and also reduce electromagnetic interference caused by external wiring. In addition, the power module 63 generates a lot of heat during operation, and directly mounting it on the circuit board 62 facilitates the integration of a heat dissipation structure. This maximizes the use of limited space for effective thermal management.

[0065] The refrigerant radiator 8 is connected to the heat exchange component 4. The refrigerant radiator 8 is located inside the electrical control box 61. The refrigerant radiator 8 is used to dissipate heat for the power module 63. The refrigerant can flow between the refrigerant radiator 8 and the heat exchange component 4, which facilitates the continuous exchange of heat between the refrigerant and the power module 63 inside the electrical control box 61, thereby effectively improving the heat dissipation efficiency of the power module 63 and ensuring the normal operation of the outdoor unit 100 of the air conditioner.

[0066] The heat dissipation substrate 9 is disposed inside the electrical control box 61, and the heat dissipation substrate 9 is located on the side of the refrigerant heat sink 8 near the circuit board 62. The heat dissipation substrate 9 is used to conduct heat between the power module 63 and the refrigerant heat sink 8. With this arrangement, the heat dissipation substrate 9 can concentrate and absorb the heat emitted by the power module 63 and conduct it to the refrigerant heat sink 8. The outer surface of the refrigerant heat sink 8 exchanges heat with the heat dissipation substrate 9, thereby achieving the heat dissipation and cooling effect of the power module 63 and ensuring the normal operation of the power module 63.

[0067] The heat dissipation substrate 9 includes an insulating main board 91 and a heat sink 92. The insulating main board 91 has a heat dissipation area 911 corresponding to the power module 63. The heat sink 92 is disposed on the insulating main board 91 and is located in the heat dissipation area 911.

[0068] Specifically, the insulating motherboard 91 can provide electrical isolation and also constitute the main external contour structure of the heat dissipation substrate 9. The heat dissipation area 911 on the insulating motherboard 91 corresponds to the position of the power module 63. The heat dissipation component 92 is installed in the heat dissipation area 911 of the insulating motherboard 91. With this arrangement, the heat dissipation substrate 9 can retain the heat dissipation component 92 in the position where the heat dissipation of the power module 63 is directly and effectively performed, while the position where the heat dissipation of the power module 63 is ineffective or has a small effect is replaced by insulating material. This can effectively reduce the material consumption of the traditional heat dissipation component 92, thereby reducing manufacturing costs.

[0069] Moreover, compared to the traditional all-aluminum heat dissipation substrate solution (which requires extrusion and automated lathe processing, making the process complex), the embodiment in this case can solve the creepage safety distance problem through the insulating body, and reduce the consumption of heat dissipation substrate (for example, the heat dissipation substrate 9 in this case can be manufactured through an insert solution, that is, simply put the formed heat dissipation component 92 directly into the mold and fill it by injection molding). In addition, the processing of heat dissipation component 92 is simpler and the processing cost is lower, thereby improving electrical controllability, safety, economy and manufacturability.

[0070] Alternatively, the heat sink 92 can be a sheet metal part, such as an aluminum substrate, and the insulating motherboard 91 can be a nylon part. The aluminum substrate can be embedded into the nylon part by injection molding. This can reduce the cost of raw materials (i.e., aluminum) and reduce the ineffective heat exchange area (i.e., heat dissipation is required in the area where heat dissipation is needed, and heat dissipation is not required in the area where heat dissipation is not needed).

[0071] Therefore, by setting up the outdoor unit 100 of this air conditioner, the material consumption of the heat dissipation component 92 can be reduced while ensuring the heat dissipation effect, and the creepage distance problem can also be solved, thereby improving economy and safety.

[0072] According to some optional embodiments of the present invention, combined with Figure 5 , Figure 6 , Figure 11 and Figure 12 As shown, the heat dissipation area 911 is constructed as a heat dissipation hole that penetrates along the thickness direction of the insulating motherboard 91, and the heat dissipation component 92 is disposed in the heat dissipation hole.

[0073] Among them, heat dissipation holes are formed along the thickness direction of the insulating main board 91, which can provide a mounting position for the heat sink 92. This can save vertical arrangement space inside the electrical control box 61, and can also fix and protect the heat sink 92, thereby improving the rationality of the arrangement and structural safety of the heat dissipation substrate 9.

[0074] Specifically, in combination Figure 9 , Figures 11-13 As shown, the surface of the insulating motherboard 91 near the refrigerant radiator 8 is flush with the surface of the heat sink 92 near the refrigerant radiator 8.

[0075] Understandably, along the vertical direction, the lower surface of the insulating motherboard 91 (that is, the side closer to the refrigerant radiator 8) is flush with the lower surface of the heat sink 92. This allows the distance between the heat sink 92 and the refrigerant radiator 8 to be shortened as much as possible without protruding from the lower surface of the insulating motherboard 91, thereby improving heat conduction efficiency. It also avoids the risk of heat dissipation not being concentrated due to the heat sink 92 protruding from the lower surface of the insulating motherboard 91 (that is, the heat sink 92 is easy to dissipate from the outer periphery of the part protruding from the insulating body to the surrounding environment instead of being directly conducted to the upper surface of the refrigerant radiator 8), thereby improving heat conduction efficiency.

[0076] Optionally, combined Figure 9 , Figures 11-13 As shown, the surface of the insulating motherboard 91 near the circuit board 62 is flush with the surface of the heat sink 92 near the circuit board 62.

[0077] In other words, along the vertical direction, the upper surface of the insulating motherboard 91 (that is, the side closer to the refrigerant radiator 8) is flush with the upper surface of the heat sink 92. This allows the distance between the heat sink 92 and the circuit board 62 to be shortened as much as possible without protruding from the upper surface of the insulating motherboard 91, thereby improving the heat conduction efficiency. It also avoids the risk of structural interference and collision that may be caused by the heat sink 92 protruding from the upper surface of the insulating motherboard 91. Moreover, this arrangement simplifies the alignment steps in the manufacturing process, reduces processing difficulty and cost, thereby improving its layout rationality and manufacturability.

[0078] According to some optional embodiments of the present invention, combined with Figure 9 , Figure 11 and Figure 12As shown, there are multiple heat sinks 92, which are spaced apart along the length of the insulating motherboard 91. This makes the arrangement of the heat sinks 92 more regular and orderly, thereby simplifying the production process and increasing the production speed. The position of the heat sinks 92 can also be flexibly adjusted according to the position of the power module 63, thereby improving the flexibility of the arrangement of the heat sinks 92.

[0079] Specifically, in combination Figure 11 and Figure 12 As shown, when projected horizontally, the total projected area of ​​the multiple heat sinks 92 is not less than half the projected area of ​​the insulating motherboard 91.

[0080] The above arrangement ensures that the heat sink 92 has a relatively large heat dissipation area within the limited dimensions of the insulating motherboard 91, meaning that the heat sink 92 has a larger surface area for heat exchange, thereby improving the heat conduction effect of the heat sink 92; moreover, the larger heat dissipation area is conducive to more even heat distribution, avoiding local overheating (hot spots), thereby improving the heat dissipation effect of the heat sink 92.

[0081] Alternatively, the insulating main board 91 is an integrally molded insulating nylon part. Integral molding can reduce the number of parts and assembly time, thereby reducing assembly steps, reducing manufacturing costs, and improving production efficiency. It can also avoid the matching errors that may occur in traditional multi-part assembly, thereby improving the precision and consistency of the product. It can also reduce stress concentration points (due to the absence of seams and welds), thereby improving the overall structural strength and rigidity of the structure, and thus improving the structural reliability of the insulating body.

[0082] In addition, the heat sink 92 is made of aluminum plate. Since aluminum plate has high structural strength and rigidity, this arrangement can effectively improve the service life of the heat sink 92. Moreover, aluminum has high thermal conductivity, which can quickly absorb and dissipate heat, thereby improving the heat conduction effect of the heat sink 92.

[0083] According to some optional embodiments of the present invention, combined with Figures 8-10 As shown, the outdoor unit 100 of the air conditioner also includes a refrigerant bracket 7, which is disposed inside the electrical control box 61. The electrical control box 61 can serve as the mounting carrier for the refrigerant bracket 7, which can support the refrigerant radiator 8 and the heat dissipation base plate 9. The refrigerant bracket 7 is located on one side of the circuit board 62 and is disposed adjacent to the power module 63. This facilitates providing the refrigerant radiator 8 with a space closer to the power module 63, thereby providing a reasonable spatial arrangement and improving the heat dissipation effect of the power module 63.

[0084] Furthermore, the top wall of the electrical control box 61 is provided with a first mounting hole 611, the heat dissipation substrate 9 is provided with a second mounting hole 93, and the refrigerant bracket 7 is provided with a third mounting hole 71; the outdoor unit 100 of the air conditioner also includes fasteners, which pass through the first mounting hole 611, the second mounting hole 93, and the third mounting hole 71, so that the heat dissipation substrate 9 and the refrigerant substrate clamp the refrigerant radiator 8. For example, the first mounting hole 611 can be a through hole, the second mounting hole 93 can be a through hole, and the third mounting hole 71 can be a threaded hole, and is not limited thereto.

[0085] Specifically, the fasteners pass through the first mounting hole 611 and the second mounting hole 93 from top to bottom and are then connected and fixed to the third mounting hole 71. This allows the top wall of the electrical control box 61, the heat dissipation base plate 9, and the refrigerant bracket 7 to be connected as a whole. This increases the weight and spatial modality of each other, thereby enhancing the structural strength and bending and torsional stiffness. Moreover, compared with other connection methods such as welding and bonding, this screw connection is more convenient and simple for users to assemble and disassemble, thereby improving its structural reliability, practicality, and ease of assembly and disassembly.

[0086] Furthermore, since the refrigerant radiator 8 is located between the heat dissipation base plate 9 and the refrigerant support 7 in the vertical direction, the refrigerant radiator 8 can be clamped and fixed between the heat dissipation base plate 9 and the refrigerant support 7 after they are connected and fixed as a whole. This avoids the need to make holes in the refrigerant radiator 8, meaning that the entire area of ​​the refrigerant radiator 8 is used for heat dissipation, thereby simplifying the manufacturing process and improving production speed and heat dissipation efficiency.

[0087] According to some optional embodiments of the present invention, combined with Figures 11-15 As shown, the refrigerant radiator 8 is plate-shaped, and multiple heat dissipation channels 81 are formed inside the refrigerant radiator 8, which extend along its length direction and are spaced apart along its width direction.

[0088] Among them, since the plate shape can have a large surface area without occupying too much of its own thickness, the plate-shaped refrigerant radiator 8 can have a larger surface area for conducting and dissipating heat, thereby improving the heat dissipation efficiency; moreover, multiple heat dissipation channels 81 can increase the heat exchange cross-sectional area between the refrigerant radiator 8 and the refrigerant, thereby improving the heat exchange efficiency and thus improving the heat dissipation effect of the power module 63.

[0089] Furthermore, the plate-shaped refrigerant radiator 8 is relatively thin, which shortens the heat transfer path. Multiple heat dissipation channels 81 increase the area of ​​refrigerant flowing in the left-right direction. This structural design results in a larger heat exchange area, more thorough heat exchange, and better heat dissipation. In addition, since the cross-sectional area of ​​the heat dissipation channels 81 can be the same as the inner diameter of a 6mm copper pipe, there is no throttling issue.

[0090] Alternatively, combined Figures 11-15As shown, the refrigerant radiator 8 includes a heat dissipation main board 82, a first end plate 83, and a second end plate 84. The heat dissipation main board 82 has multiple heat dissipation channels 81. The first end plate 83 is located at one end of the heat dissipation main board 82 and has a refrigerant inlet 831 and a refrigerant outlet 832. The refrigerant inlet 831 is connected to the heat exchange component 4 and a portion of the heat dissipation channels 81, respectively. The refrigerant outlet 832 is connected to another portion of the heat dissipation channels 81. The second end plate 84 is located at the other end of the heat dissipation main board 82 and is connected to multiple heat dissipation channels 81.

[0091] It is understandable that, along the length (left-right direction) of the refrigerant radiator 8, the first end plate 83 and the second end plate 84 are located at both ends of the heat dissipation main plate 82, respectively. The first end plate 83 and the second end plate 84 help the heat dissipation channel 81 to form a closed channel system, reduce the risk of refrigerant leakage, and improve the sealing of the refrigerant in the heat dissipation channel 81.

[0092] Furthermore, the first end plate 83 is provided with a refrigerant inlet 831 and a refrigerant outlet 832. The refrigerant inlet 831 allows the refrigerant inside the heat exchange component 4 to flow into the heat dissipation channel 81. When the refrigerant flowing into the heat dissipation channel 81 continues to flow to the second end plate 84, the second end plate 84 forms a blocking effect on the refrigerant fluid, forcing the flow direction of the refrigerant fluid to change. Then, driven by the fluid pressure, the refrigerant flows into the heat dissipation channel 81 connected to the refrigerant outlet 832 and flows towards the refrigerant outlet 832 until it flows back into the heat exchange component 4. In this way, the continuous circulation heat exchange effect of the refrigerant between the heat exchange component 4 and the refrigerant radiator 8 can be successfully achieved, thereby improving the heat dissipation effect on the power module 63.

[0093] Alternatively, the refrigerant radiator 8 can also be constructed as a flow loop formed by two refrigerant pipes. The relevant structure on which the refrigerant radiator 8 is installed has a groove that matches the outline of the refrigerant pipe. This can ensure the positional stability of the refrigerant radiator 8 and reduce the space occupied by the refrigerant pipe in the electrical control box 61, thereby improving space utilization.

[0094] According to some optional embodiments of the present invention, combined with Figure 5 , Figures 7-9 and Figure 11 As shown, the outdoor unit 100 of the air conditioner also includes a component bracket 94, which is disposed between the heat dissipation base plate 9 and the circuit board 62. The component bracket 94 is used to support the power module 63.

[0095] Specifically, the component support 94 can provide structural support for the electronic components on the circuit board 62, disperse the connection stress on the circuit board 62, and thus enhance the structural stability and robustness of the electronic components.

[0096] Combination Figure 9 , Figures 16-17 As shown, the component bracket 94 has an air outlet 941 close to the outdoor fan 5 and an air inlet 942 away from the outdoor fan 5. The air inlet 942 of the component bracket 94 forms an air inlet gap 943 with the heat dissipation substrate 9, and an air outlet gap is formed between the air outlet 941 of the component bracket 94 and the heat dissipation substrate 9. The component bracket 94, the circuit board 62, the power module 63 and the heat dissipation substrate 9 together define the air outlet path, and the air path is connected between the air inlet gap 943 and the air outlet gap.

[0097] Specifically, along the vertical direction, the component support 94 is located between the heat dissipation substrate 9 and the circuit board 62, while the power module 63 is connected to the lower end of the circuit board 62. The component support 94 and the circuit board 62 together provide support for the power module 63. The component support 94 has an air inlet end 942 (the end away from the outdoor fan 5) and an air outlet end 941 (the end close to the outdoor fan 5) along the horizontal direction. The air inlet end 942 and the heat dissipation substrate 9 form an air inlet gap 943 that allows airflow to pass through, and the air outlet end 941 and the heat dissipation substrate 9 form an air outlet gap that allows airflow to pass through. This facilitates the flow of external air through the air inlet gap 943 into the air path and then through the air outlet gap to flow out. This allows the airflow to carry away some of the heat from the power module 63, optimizes the temperature reduction effect of the refrigerant radiator 8 on the power module 63, and thus ensures the working stability of the outdoor unit 100 of the air conditioner.

[0098] Combination Figures 1-17 As shown, the outdoor unit 100 of the air conditioner according to the second aspect embodiment of the present utility model includes a casing 1, a partition 2, a compressor 3, a heat exchange assembly 4, an outdoor fan 5, and an electrical control box 6.

[0099] The housing 1 defines an installation cavity 11, and the housing 1 has an air inlet 12 and an air outlet 13.

[0100] Specifically, the airflow flows through the air inlet 12 and air outlet 13 on the casing 1, realizing air circulation between the outdoor airflow and the outdoor unit 100 of the air conditioner. The outdoor fan 5 can drive the external airflow to enter the outdoor unit 100 of the air conditioner from the air inlet 12. The heat exchange component 4 exchanges heat with the external airflow entering from the air inlet 12. The heat exchange airflow formed is then blown to the outside from the air outlet 13 under the drive of the outdoor fan 5, thereby exchanging the heat inside the outdoor unit 100 of the air conditioner with the outside, and meeting the user's demand for ambient temperature.

[0101] The partition 2 is installed inside the housing 1, and the partition 2 divides the mounting cavity 11 into a compressor cavity 111 and a fan cavity 112. The compressor 3 is installed in the compressor cavity 111, and the outdoor fan 5 is installed in the fan cavity 112.

[0102] Specifically, the partition 2 can separate the mounting cavity 11 inside the housing 1. This facilitates the effective differentiation of the installation positions of the compressor 3 and the outdoor fan 5 within the housing 1, improving the neatness of the layout. On the other hand, it can also prevent water droplets on the outdoor fan 5 from being splashed onto the compressor 3 and circuit components inside the compressor cavity 111 when the outdoor fan 5 is running, thereby reducing the safety risks of electrical appliances.

[0103] Furthermore, the heat exchange component 4 is installed inside the fan cavity 112. This allows the airflow outside the casing 1 to enter the fan cavity 112 under the negative pressure of the outdoor fan 5. After the airflow passes through the heat exchange component 4, it is blown out to the outside of the casing 1, which helps to ensure that the outdoor unit 100 of the air conditioner can smoothly achieve the heat exchange effect of the airflow.

[0104] The outdoor fan 5 is installed inside the fan cavity 112. The outdoor fan 5 is used to introduce the airflow outside the casing 1 into the fan cavity 112 through the air inlet 12, and after heat exchange by the heat exchange component 4, it is output to the outside through the air outlet 13.

[0105] Specifically, the rotation of the outdoor fan 5 can generate negative pressure on the air outside the casing 1 through the air inlet 12, thereby driving the air outside the casing 1 into the fan cavity 112 under the action of air pressure. The airflow entering the fan cavity 112 exchanges heat with the heat exchange component 4 inside the fan cavity 112. The heat-exchanged airflow is then output to the outside of the casing 1 through the air outlet 13. In this way, the effect of heat exchange between the refrigerant in the heat exchange component 4 and the outdoor air can be achieved.

[0106] The electrical control box 6 is located inside the mounting cavity 11. The electrical control box 6 includes an electrical control box body 61, a circuit board 62, a power module 63, a refrigerant radiator 8, a heat dissipation substrate 9, and a component bracket 94.

[0107] Specifically, circuit board 62 forms a complete circuit system by electrically connecting electronic components (such as resistors, capacitors, transistors, integrated circuits, etc.) according to a pre-designed circuit diagram layout. For example, circuit board 62 can be electrically connected to outdoor fan 5 and compressor 3 respectively.

[0108] Furthermore, the electrical control box 61 can protect the internal structure, and the circuit board 62 can send different control commands to the outdoor fan 5 and compressor 3 in the form of electrical signals, thereby improving the sensitivity and accuracy of the outdoor fan 5 and compressor 3 in executing the working commands.

[0109] The power module 63 (such as an electrolytic capacitor or chip 621, which are electronic components that easily dissipate a lot of heat) is placed on the circuit board 62. This arrangement can ensure more reliable signal transmission between the power module 63 and the control circuit on the circuit board 62, and also reduce electromagnetic interference (EMI) problems caused by external wiring. In addition, the power module 63 generates a lot of heat during operation, and it is easy to integrate a heat dissipation structure by directly mounting it on the circuit board 62. This can maximize the use of limited space for effective thermal management.

[0110] The refrigerant radiator 8 is connected to the heat exchange component 4. The refrigerant radiator 8 is located inside the electrical control box 61. The refrigerant radiator 8 is used to dissipate heat for the power module 63. The refrigerant can flow between the refrigerant radiator 8 and the heat exchange component 4, which facilitates the continuous exchange of heat between the refrigerant and the power module 63 inside the electrical control box 61, thereby effectively improving the heat dissipation efficiency of the power module 63 and ensuring the normal operation of the outdoor unit 100 of the air conditioner.

[0111] The heat dissipation substrate 9 is disposed inside the electrical control box 61, and the heat dissipation substrate 9 is located on the side of the refrigerant heat sink 8 near the circuit board 62. The heat dissipation substrate 9 is used to conduct heat between the power module 63 and the refrigerant heat sink 8. With this arrangement, the heat dissipation substrate 9 can concentrate and absorb the heat emitted by the power module 63 and conduct it to the refrigerant heat sink 8. The outer surface of the refrigerant heat sink 8 exchanges heat with the heat dissipation substrate 9, thereby achieving the heat dissipation and cooling effect of the power module 63 and ensuring the normal operation of the power module 63.

[0112] The outdoor unit 100 of the air conditioner also includes a component bracket 94, which is disposed between the heat dissipation base plate 9 and the circuit board 62. The component bracket 94 is used to support the power module 63. The component bracket 94 can provide structural support for the electronic components on the circuit board 62, disperse the connection stress of the circuit board 62, and thus enhance the structural stability and robustness of the electronic components.

[0113] The component bracket 94 has an air outlet 941 close to the outdoor fan 5 and an air inlet 942 away from the outdoor fan 5. The air inlet 942 of the component bracket 94 forms an air inlet gap 943 with the heat dissipation substrate 9, and an air outlet gap is formed between the air outlet 941 of the component bracket 94 and the heat dissipation substrate 9. The component bracket 94, circuit board 62, power module 63 and heat dissipation substrate 9 together define the air outlet path, and the air path is connected between the air inlet gap 943 and the air outlet gap.

[0114] Specifically, along the vertical direction, the component support 94 is located between the heat dissipation substrate 9 and the circuit board 62, while the power module 63 is connected to the lower end of the circuit board 62. The component support 94 and the circuit board 62 together provide support for the power module 63. The component support 94 has an air inlet end 942 (the end away from the outdoor fan 5) and an air outlet end 941 (the end close to the outdoor fan 5) along the horizontal direction. The air inlet end 942 and the heat dissipation substrate 9 form an air inlet gap 943 that allows airflow to pass through, and the air outlet end 941 and the heat dissipation substrate 9 form an air outlet gap that allows airflow to pass through. This facilitates the flow of external air through the air inlet gap 943 into the air path and then through the air outlet gap to flow out. This allows the airflow to carry away some of the heat from the power module 63, optimizes the temperature reduction effect of the refrigerant radiator 8 on the power module 63, and thus ensures the working stability of the outdoor unit 100 of the air conditioner.

[0115] Compared to the traditional component support arrangement (where the power module is located on the component support, and the circuit board, power module, component support and heat sink form a closed space with no air circulation, resulting in a high temperature of the power module and affecting the heat dissipation effect of the refrigerant heat sink), the embodiment in this case can form an air inlet gap 943 and an air outlet gap between the component support 94 and the heat sink 9 and connect them to the airflow path. This allows the airflow to carry away some of the heat from the power module 63, thereby enhancing the heat dissipation effect of the power module 63.

[0116] Alternatively, the height of the air inlet gap 943 is H1, where H1 satisfies the relationship H1≤1.5mm. This design allows the air inlet gap 943 to be narrower, which can effectively block larger particles of dust, debris and other foreign objects from entering the power module 63, protecting sensitive components such as chip 621 and circuit board 62 from contamination. It can also allow airflow to pass through the power module 63 and carry away some heat, thereby improving the heat dissipation effect.

[0117] Alternatively, the height of the air outlet gap is H2, where H2 satisfies the relationship H2≤1.5mm. This design allows for a narrower air inlet gap 943, which increases the airflow velocity as it exits the air inlet gap 943, thereby improving the heat dissipation rate. It can also effectively prevent larger dust particles, debris, and other foreign objects from entering the power module 63, protecting sensitive components such as the chip 621 and circuit board 62 from contamination.

[0118] According to some optional embodiments of the present invention, the heat dissipation substrate 9 includes an insulating main board 91 and a heat dissipation component 92. The insulating main board 91 forms a heat dissipation area 911 corresponding to the power module 63. The heat dissipation component 92 is a sheet metal part. The heat dissipation component 92 is disposed on the insulating main board 91 and is located in the heat dissipation area 911.

[0119] Specifically, the insulating motherboard 91 can provide electrical isolation and also constitute the main external contour structure of the heat dissipation substrate 9. The heat dissipation area 911 on the insulating motherboard 91 corresponds to the position of the power module 63. The heat dissipation component 92 is installed in the heat dissipation area 911 of the insulating motherboard 91. With this arrangement, the heat dissipation substrate 9 can retain the heat dissipation component 92 in the position where the heat dissipation of the power module 63 is directly and effectively performed, while the position where the heat dissipation of the power module 63 is ineffective or has a small effect is replaced by insulating material. This can effectively reduce the material consumption of the traditional heat dissipation component 92, thereby reducing manufacturing costs.

[0120] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0121] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0122] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0123] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0125] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An outdoor unit for an air conditioner, comprising: A housing, wherein an installation cavity is defined inside the housing, and an air inlet and an air outlet are formed on the housing; A heat exchange assembly is disposed within a fan cavity, and a refrigerant flows within the heat exchange assembly. The heat exchange component is used to exchange heat between the refrigerant and the outside air; An outdoor fan is used to introduce airflow from outside the casing into the fan cavity through the air inlet, and after heat exchange by the heat exchange component, it is output to the outside through the air outlet. An electrical control box is disposed within the mounting cavity; The electrical control box is characterized in that it comprises: Electrical control box; A circuit board, which is disposed within the electrical control box; A power module, wherein the power module is disposed on the circuit board; A refrigerant radiator is connected to the heat exchange component and is disposed inside the electrical control box. The refrigerant radiator is used to dissipate heat for the power module. A heat dissipation substrate is disposed inside the electrical control box and located on the side of the refrigerant radiator close to the circuit board. The heat dissipation substrate is used to conduct heat between the power module and the refrigerant radiator. The heat dissipation substrate includes: An insulating motherboard, wherein the insulating motherboard has a heat dissipation area corresponding to the power module; A heat sink, which is a sheet metal part, is disposed on the insulating main board and located in the heat dissipation area.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The surface of the insulating main board near the refrigerant radiator is flush with the surface of the heat sink near the refrigerant radiator. and / or The surface of the insulating motherboard near the circuit board is flush with the surface of the heat sink near the circuit board.

3. The outdoor unit of the air conditioner according to claim 1, characterized in that, The number of heat sinks is multiple, and the multiple heat sinks are spaced apart along the length of the insulating motherboard and projected in the horizontal direction. The total projected area of ​​the multiple heat sinks is not less than half of the projected area of ​​the insulating motherboard.

4. The outdoor unit of the air conditioner according to claim 1, characterized in that, The insulating main board is a one-piece molded insulating nylon component; and / or The heat sink is constructed of an aluminum plate.

5. The outdoor unit of the air conditioner according to claim 1, characterized in that, Also includes: A refrigerant bracket is disposed inside the electrical control box. The refrigerant bracket is located on one side of the circuit board and adjacent to the power module. The refrigerant radiator and the heat dissipation substrate are disposed on the refrigerant bracket. The top wall of the electrical control box is provided with a first mounting hole, the heat dissipation substrate is provided with a second mounting hole, and the refrigerant bracket is provided with a third mounting hole. The outdoor unit of the air conditioner also includes: Fasteners, which pass through the first mounting hole, the second mounting hole and the third mounting hole, so that the heat dissipation substrate and the refrigerant bracket clamp the refrigerant radiator.

6. The outdoor unit of the air conditioner according to claim 1, characterized in that, The refrigerant radiator is plate-shaped, and multiple heat dissipation channels are formed inside the refrigerant radiator, extending along its length and spaced apart along its width.

7. The outdoor unit of the air conditioner according to claim 1, characterized in that, Also includes: A component bracket is disposed between the heat dissipation substrate and the circuit board. The component bracket is used to support the power module. The component bracket has an air outlet end close to the outdoor fan and an air inlet end away from the outdoor fan. The component bracket has an air inlet gap with the heat dissipation substrate and an air outlet gap with the heat dissipation substrate at its air outlet end. The component bracket, the circuit board, the power module, and the heat dissipation substrate together define an air outlet path, which is connected between the air inlet gap and the air outlet gap.

8. An outdoor unit for an air conditioner, comprising: A housing, wherein an installation cavity is defined inside the housing, and an air inlet and an air outlet are formed on the housing; A partition is disposed within the housing and divides the mounting cavity into a compressor cavity and a fan cavity; A compressor, wherein the compressor is disposed within the compressor chamber; A heat exchange assembly is disposed within the fan cavity, and a refrigerant flows within the heat exchange assembly. The heat exchange component is used to exchange heat between the refrigerant and the outside air; An outdoor fan is disposed inside the fan cavity. The outdoor fan is used to introduce airflow from outside the casing into the fan cavity through the air inlet, and after heat exchange by the heat exchange component, it is output to the outside through the air outlet. An electrical control box is disposed within the mounting cavity; The electrical control box is characterized in that it comprises: Electrical control box; A circuit board, which is disposed within the electrical control box; A power module, wherein the power module is disposed on the circuit board; A refrigerant radiator is connected to the heat exchange component and is disposed inside the electrical control box. The refrigerant radiator is used to dissipate heat for the power module. A heat dissipation substrate is disposed inside the electrical control box and located on the side of the refrigerant radiator close to the circuit board. The heat dissipation substrate is used to conduct heat between the power module and the refrigerant radiator. A component bracket is disposed between the heat dissipation substrate and the circuit board. The component bracket is used to support the power module. The component bracket has an air outlet end close to the outdoor fan and an air inlet end away from the outdoor fan. The component bracket has an air inlet gap with the heat dissipation substrate and an air outlet gap with the heat dissipation substrate at its air outlet end. The component bracket, the circuit board, the power module, and the heat dissipation substrate together define an air outlet path, which is connected between the air inlet gap and the air outlet gap.

9. The outdoor unit of the air conditioner according to claim 8, characterized in that, The height of the air inlet gap is H1, where H1 satisfies the relationship H1≤1.5mm; and / or The height of the air outlet gap is H2, and H2 satisfies the relationship H2≤1.5mm.

10. The outdoor unit of the air conditioner according to claim 8, characterized in that, The heat dissipation substrate includes: An insulating motherboard, wherein the insulating motherboard has a heat dissipation area corresponding to the power module; A heat sink, which is a sheet metal part, is disposed on the insulating main board and located in the heat dissipation area.

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