Air conditioner outdoor unit

Abstract

The utility model discloses an air conditioner outdoor unit, and belongs to the technical field of air treatment. The air conditioner outdoor unit comprises an outdoor unit shell. The electric control box assembly is arranged in the outdoor unit shell; the electric control box assembly comprises a box body, wherein an electric control cavity is formed in the box body; a mounting hole is formed in the box body, and the electric control cavity is communicated with the space outside the box body through the mounting hole; the substrate is arranged in the electric control cavity; the refrigerant heat dissipation assembly is connected to the outer side of the box body and used for dissipating heat of the power device on the substrate; the refrigerant heat dissipation assembly comprises a substrate heat dissipation sheet which is attached to the power device; the refrigerant heat dissipation block is attached to one side, far away from the power device, of the substrate heat dissipation sheet; the fastening screws are used for connecting the substrate radiating fins with the refrigerant radiating blocks from the mounting holes; the sealing plug is arranged in the mounting hole and is used for sealing the mounting hole; and the sealing gasket is connected between the substrate radiating fin and the box body, and the sealing gasket is provided with a screw penetrating hole for the fastening screw to penetrate through. According to the utility model, the short circuit of the substrate caused by condensate water generated on the fastening screws can be prevented.

Description

Technical Field

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

[0002] The outdoor unit of an air conditioner is the core component of the air conditioning system. Its main function is to circulate refrigerant and dissipate heat through a compressor and an outdoor fan. The outdoor unit also contains a complex electrical system, installed in an electrical box, including circuit boards, power devices, and other electronic components. The normal operation of these components is crucial to the stability of the system.

[0003] To meet the heat dissipation requirements during high-power operation, existing technologies typically use system refrigerant to cool the power devices on the substrate. The refrigerant absorbs and carries away heat through the refrigerant heat sink and the substrate heat sink, ensuring that the substrate temperature remains within a safe range. To ensure tight contact between the refrigerant heat sink and the substrate heat sink, they are fixed together with fastening screws, and the substrate base has mounting holes for screw installation and removal. However, when the outdoor unit of the air conditioner is a water-related product and the indoor water temperature is low, the heat dissipation demand is low, or the refrigerant temperature is low, the temperature of the refrigerant heat sink is significantly lower than the ambient temperature. This causes the surface temperature of the fastening screws to become too low, resulting in condensation of liquid water on the screw surface, which greatly increases the probability of a short circuit on the substrate. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, one aspect of this application proposes an outdoor unit for an air conditioner, comprising:

[0006] Outdoor unit casing;

[0007] The electrical control box assembly is disposed inside the outdoor unit housing; the electrical control box assembly includes:

[0008] The box body has an electrical control cavity formed inside it; the box body is provided with a mounting hole that connects the electrical control cavity to the space outside the box body.

[0009] A substrate is disposed in the electronically controlled cavity;

[0010] A refrigerant heat dissipation assembly, connected to the outside of the housing, is used to dissipate heat from the power devices on the substrate; the refrigerant heat dissipation assembly includes:

[0011] The heat sink on the substrate is attached to the power device.

[0012] A refrigerant heat sink is attached to the side of the substrate heat sink away from the power device;

[0013] Fastening screws are used to connect the substrate heat sink to the refrigerant heat sink through the mounting holes;

[0014] A sealing plug is disposed in the mounting hole to seal the mounting hole;

[0015] A sealing gasket is connected between the heat sink on the substrate and the housing. The sealing gasket has screw holes for the fastening screws to pass through.

[0016] In the technical solution, a sealing gasket is used to seal the gap between the refrigerant heat dissipation component and the housing, and a sealing plug is used to isolate the fastening screw from the substrate. This ensures that the part of the fastening screw near the housing is in a sealed space, thereby preventing moisture in the air from condensing into liquid water on the low-temperature fastening screw, eliminating the risk of liquid water seeping into the housing, preventing the electrical control box component from being in a high humidity environment, preventing substrate short circuits, and improving the lifespan of electronic components.

[0017] In some embodiments, an installation space is provided on the outer surface of the housing, and a sealing gasket is disposed in the installation space so that the surface of the refrigerant heat dissipation assembly near the housing is flush with the outer surface of the adjacent housing.

[0018] In this technical solution, the design allows the sealing gasket to be embedded, avoiding increasing the gap between the box and the refrigerant heat dissipation component. The overall thickness of the electrical control box component is small, and the refrigerant heat dissipation component can seal the installation space to a certain extent, improving the sealing effect.

[0019] In some embodiments, a sealing flange is provided on the surface of the housing near the refrigerant heat dissipation assembly; the sealing flange surrounds the outer periphery of the refrigerant heat dissipation assembly.

[0020] In this technical solution, this structural design not only provides positioning and support for the installation of the refrigerant heat dissipation component, enabling the refrigerant heat dissipation component to be positioned and installed via the sealing flange, but also forms a seal between the refrigerant heat dissipation component and the housing via the sealing flange. This results in a double seal formed by the cooperation of the sealing flange and the sealing gasket, further preventing air from entering the gap between the refrigerant heat dissipation component and the housing, improving the sealing effect, preventing the formation and seepage of condensate, and thus improving the stability and reliability of the outdoor unit of the air conditioner in humid environments.

[0021] In some embodiments, a mounting post is provided on the side wall of the housing near the refrigerant heat dissipation assembly. The mounting post protrudes into the electrical control cavity and has the mounting hole. The end of the fastening screw is located in the mounting post.

[0022] In the technical solution, the structural design provides a sealed installation space for the end of the fastening screw near the housing, and the fastening screw is separated from the internal space of the housing by a sealing plug.

[0023] In some embodiments, a clearance groove is provided on the end face of the sealing plug near the refrigerant heat dissipation assembly, and the end of the fastening screw extends into the clearance groove.

[0024] In this technical solution, the structural design ensures a tight fit between the sealing plug and the fastening screw, resulting in a compact installation, reduced overall dimensions of the electrical box assembly, and prevention of the fastening screw from loosening or pushing the sealing plug out of the mounting hole, thus ensuring the stability of the sealing plug installation. Furthermore, the axial overlap between the sealing plug and the fastening screw allows the sealing plug to be installed closer to the refrigerant heat dissipation component, reducing the overall thickness of the electrical box assembly. On the other hand, the sealing plug's coverage of the fastening screw surface reduces the exposed surface area of ​​the fastening screw, thereby decreasing the likelihood of liquid water condensing on the screw surface.

[0025] In some embodiments, the fastening screws expand the clearance groove.

[0026] In the technical solution, the structural design makes the outer diameter of the expanded end of the sealing plug larger than the mounting hole, so that it gets stuck on the side of the mounting hole near the refrigerant heat dissipation component, making it more difficult for the sealing plug to come out of the mounting hole under the reverse push of the fastening screw.

[0027] In some embodiments, the sealing plug is threadedly connected to the mounting hole.

[0028] In the technical solution, the structural design not only improves the sealing effect through the threaded connection, but also enhances the installation stability of the sealing plug, thereby further improving the stability and reliability of the outdoor unit of the air conditioner in a humid environment; on the other hand, the threaded connection ensures that the sealing plug and the fastening screw are closely fitted, so that the fastening screw expands the sealing plug.

[0029] In some embodiments, the substrate is provided with a through groove, the through groove is opposite to the mounting hole, and the sealing plug is installed from the through groove into the mounting hole.

[0030] In the technical solution, the structural design improves the stability of the sealing plug installation and can better seal the mounting hole, thereby improving the overall sealing performance of the electrical control box assembly and effectively preventing external air and moisture from entering the electrical control cavity.

[0031] In some embodiments, the sealing plug is provided with a limiting flange that surrounds the sealing plug and abuts against the substrate to restrict the movement of the sealing plug toward the refrigerant heat dissipation assembly.

[0032] In this technical solution, the structural design effectively limits the position of the sealing gasket, preventing it from shifting excessively towards the fastening screw side during installation or use. This avoids excessive expansion and cracking at one end of the sealing plug, ensuring its service life. On the other hand, when the limiting flange limits the sealing plug, it fits tightly against the substrate inside the box, improving the sealing effect of the mounting hole and preventing the formation and infiltration of condensate. This better protects the electrical control box components from the effects of a humid environment, improving the system's stability and service life.

[0033] In another aspect of this application, an outdoor unit for an air conditioner includes:

[0034] Outdoor unit casing;

[0035] The electrical control box assembly is disposed inside the outdoor unit housing; the electrical control box assembly includes:

[0036] The box body has an electrical control cavity formed inside it; the box body is provided with a mounting hole that connects the electrical control cavity to the space outside the box body.

[0037] A substrate is disposed in the electronically controlled cavity;

[0038] A refrigerant heat dissipation assembly, connected to the outside of the housing, is used to dissipate heat from the power devices on the substrate; the refrigerant heat dissipation assembly includes:

[0039] The substrate heat sink is attached to the power device;

[0040] A refrigerant heat dissipation block is attached to the heat sink of the substrate on the side away from the housing.

[0041] Fastening screws are passed through the mounting holes to connect the substrate heat sink to the refrigerant heat sink block;

[0042] A sealing plug is disposed in the mounting hole to seal the mounting hole;

[0043] A sealing gasket is connected between the heat sink of the substrate and the housing. The sealing gasket is provided with a screw through hole for the fastening screw to pass through.

[0044] The side of the housing with the mounting hole, the sealing plug, and the sealing gasket form a sealing cavity, and the end of the fastening screw near the housing is located in the sealing cavity.

[0045] 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

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a perspective view of the outdoor unit of an air conditioner after the outdoor unit casing has been hidden, according to an embodiment of this application;

[0048] Figure 2 This is a perspective view of the electrical control box assembly of an outdoor air conditioner unit according to an embodiment of this application;

[0049] Figure 3 This is a perspective view of the electrical control box assembly of an outdoor air conditioner unit according to an embodiment of this application, with the box partially hidden.

[0050] Figure 4 It is a three-dimensional representation of the base plate of the electrical control box assembly of the outdoor unit of an air conditioner according to an embodiment of this application. Figure 1 ;

[0051] Figure 5 It is a three-dimensional representation of the base plate of the electrical control box assembly of the outdoor unit of an air conditioner according to an embodiment of this application. Figure 2 ;

[0052] Figure 6 This is a cross-sectional view of the electrical control box assembly of an outdoor air conditioner unit according to an embodiment of this application;

[0053] Figure 7 This is a partially enlarged cross-sectional view of the electrical control box assembly of an outdoor air conditioner unit according to an embodiment of this application.

[0054] In the above figures:

[0055] 101. Outdoor unit casing; 102. Outdoor housing cavity; 103. Outdoor air inlet; 104. Outdoor air outlet; 105. Outdoor heat exchanger; 106. Outdoor fan; 107. Compressor;

[0056] 200. Electrical control box assembly; 201. Box body; 2011. Electrical control cavity; 2012. Mounting hole; 2013. Base plate seat; 2014. Sealing flange; 2015. Clearance notch; 2016. Mounting post; 2017. Top cover; 2018. Mounting space; 202. Base plate; 2021. Through groove; 203. Refrigerant heat dissipation assembly; 2031. Base plate heat sink; 2032. Refrigerant heat dissipation block; 2033. Fastening screw; 205. Sealing plug; 2051. Clearance groove; 2052. Limiting flange; 206. Sealing gasket; 2061. Screw through hole;

[0057] 300. Refrigerant circulation piping. Detailed Implementation

[0058] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0059] In the method.

[0060] An air conditioner can consist of an outdoor unit and an indoor unit, which are connected by refrigerant circulation pipes and electrical circuits. The indoor unit is usually installed indoors and is responsible for regulating indoor air temperature and humidity; while the outdoor unit is installed outdoors and is responsible for compressing and condensing the refrigerant and dissipating heat.

[0061] This application discloses an outdoor unit for an air conditioner, which is described below with reference to the accompanying drawings.

[0062] refer to Figure 1 An outdoor unit for an air conditioner may include an outdoor unit housing 101.

[0063] The distance from the bottom to the top of the outdoor unit housing 101 is the height direction of the outdoor unit housing 101. The distance from the front to the rear of the outdoor unit housing 101 is the front-rear direction of the outdoor unit housing 101. The distance from the left to the right of the outdoor unit housing 101 is the length direction of the outdoor unit housing 101. All three directions of the outdoor unit housing 101—height, front-rear, and length—are perpendicular to each other.

[0064] An outdoor receiving cavity 102 can be formed inside the outdoor unit housing 101.

[0065] An outdoor air inlet 103 may be formed on the outdoor unit housing 101. The outdoor air inlet 103 can be the entrance for air to enter the outdoor unit housing 101. The outdoor air inlet 103 may be connected to the outdoor housing 102.

[0066] The outdoor air inlet 103 can be located on the rear side of the outdoor unit housing 101.

[0067] The outdoor air inlet 103 can be located at one end of the length of the outdoor unit housing 101 and at the rear of the outdoor unit housing 101.

[0068] An outdoor air outlet 104 may be formed on the outdoor unit housing 101. The outdoor air outlet 104 is the outlet for air to flow out of the outdoor unit housing 101. The outdoor air outlet 104 may be connected to the outdoor housing 102.

[0069] The outdoor air outlet 104 can be located on the front side of the outdoor unit housing 101.

[0070] The outdoor unit of the air conditioner may include an outdoor heat exchanger 105. The outdoor heat exchanger 105 may be located inside the outdoor housing 102. The outdoor heat exchanger 105 is used to connect to the refrigerant circulation pipeline 300 to realize heat exchange between the refrigerant and the outside air.

[0071] The outdoor unit of the air conditioner may include an outdoor fan 106. The outdoor fan 106 may be located inside the outdoor housing 102. The outdoor fan 106 may be located on the side of the outdoor heat exchanger 105 near the outdoor air outlet 104.

[0072] The indoor fan 106 can be used to power the flow of air.

[0073] The outdoor fan 106 drives outdoor air to enter the outdoor housing cavity 102 through the outdoor air inlet 103 and exchange heat with the outdoor heat exchanger 105. After exchanging heat with the outdoor heat exchanger 105, the air flows out of the outdoor housing cavity 102 through the outdoor air outlet 104.

[0074] Outdoor fan 106 may include an outdoor fan.

[0075] The outdoor fan 106 may include a fan motor. The fan motor can be connected to the outdoor fan. The fan motor drives the outdoor fan to rotate. The fan motor can be connected to the outdoor fan from the side of the outdoor fan away from the outdoor air outlet 104.

[0076] The outdoor unit of the air conditioner may include a compressor 107. The compressor 107 may be located inside the outdoor housing 102. The compressor 107 is used to connect to the refrigerant circulation line 300 to compress the refrigerant and drive the refrigerant to circulate in the system.

[0077] The outdoor unit of the air conditioner may include an electrical control box assembly 200. The electrical control box assembly 200 is disposed in the outdoor housing cavity 102 and is used to control the operating status of the compressor 107 and the outdoor fan 106.

[0078] In some embodiments, reference Figures 2 to 7 The electrical control box assembly 200 includes a box body 201. The box body 201 is the outer shell structure of the electrical control box assembly 200. The box body 201 is disposed within the outdoor receiving cavity 102. An electrical control cavity 2011 is formed inside the box body 201; a mounting hole 2012 is provided on the box body 201, which connects the electrical control cavity 2011 to the space outside the box body 201. For ease of assembly, the box body 201 is divided into a top cover 2017 and a base plate 2013.

[0079] In this application, references Figures 2 to 7 The electrical control box assembly 200 also includes a base plate 202, which is disposed in the electrical control cavity 2011. The base plate 202 is connected to the compressor 107 and the outdoor fan 106 via electrical connection lines to realize the control of the operating status of the compressor 107 and the outdoor fan 106.

[0080] In this application, references Figure 2 , Figures 6 to 7 The electrical control box assembly 200 also includes a refrigerant heat dissipation assembly 203, which is connected to the outside of the box body 201. The refrigerant heat dissipation assembly 203 is used to connect to the refrigerant circulation pipeline 300 to realize heat exchange between the refrigerant and the electrical control cavity 2011.

[0081] In this application, references Figure 6 and Figure 7 The refrigerant heat dissipation assembly 203 includes a substrate heat sink 2031. The substrate heat sink 2031 is attached to the power device on the substrate 202, thereby exchanging heat with the power device and removing the heat from the power device.

[0082] In this application, references Figure 6 and Figure 7 The refrigerant heat dissipation assembly 203 also includes a refrigerant heat sink 2032. The refrigerant heat sink 2032 is attached to the side of the substrate heat sink 2031 away from the housing, thereby exchanging heat with the substrate heat sink 2031 and removing heat from the power devices. The refrigerant heat dissipation assembly 203 is connected to the refrigerant circulation pipeline 300, realizing heat exchange between the refrigerant and the refrigerant heat sink. The heat from the power devices is sequentially transferred to the refrigerant through the substrate heat sink 2031 and the refrigerant heat sink 2032, and then carried away by the refrigerant.

[0083] In this application, references Figures 6 to 7 The refrigerant heat dissipation assembly 203 also includes a fastening screw 2033, which passes through the mounting hole 2012 and connects the base heat sink 2031 to the refrigerant heat sink block 2032. The base heat sink 2031 of the refrigerant heat dissipation assembly 203 is fixed to the housing 201. The fastening screw 2033 connects the refrigerant heat sink block 2032 of the refrigerant heat dissipation assembly 203 to the base heat sink 2031, so that the refrigerant heat sink block 2032 is tightly attached to the base heat sink 2031. The fastening screw 2033 is threadedly connected to the refrigerant heat sink block 2032.

[0084] In this application, references Figures 6 to 7 The electrical control box assembly 200 also includes a sealing plug 205, which is disposed in the mounting hole 2012 for sealing the mounting hole 2012.

[0085] In the prior art, the fastening screw 2033 tightly connects the substrate heat sink 2031 and the refrigerant heat sink 2032. There is a gap between the substrate base and the substrate heat sink. Air from inside the outdoor unit of the air conditioner enters this gap and comes into contact with the fastening screw located inside. Since the fastening screw is connected to the refrigerant heat sink, the heat of the fastening screw is carried away by the refrigerant flowing in the refrigerant heat sink, causing the moisture in the air to condense into liquid water on the low-temperature surface of the fastening screw. Furthermore, the fastening screw is located far from the edge of the substrate heat sink, and the gap between the substrate base and the substrate heat sink is narrow, making it difficult to remove the condensed liquid water. As a result, the liquid water gradually accumulates around the fastening screw, increasing the humidity inside the unit and affecting the service life of electronic components and the reliability of the system. The accumulated liquid water can even push the sealing plug, creating a gap between the sealing plug and the mounting hole. Liquid water seeps in through this gap and drips onto the substrate, causing short circuits and corrosion.

[0086] In this application, references Figures 6 to 7 The electrical control box assembly 200 also includes a sealing gasket 206, which is connected between the substrate heat sink 2031 and the box body 201. One side of the sealing gasket 206 is attached to the outer surface of the box body 201, and the other side of the sealing gasket 206 is attached to the substrate heat sink 2031 of the refrigerant heat dissipation assembly 203. The substrate heat sink 2031 of the refrigerant heat dissipation assembly 203 and the substrate base 2013 of the box body 201 clamp and fix the sealing gasket 206. The sealing gasket 206 is provided with a screw through hole 2061, and the fastening screw 2033 passes through the screw through hole 2061, so that the sealing gasket 206 surrounds the fastening screw 2033, sealing the fastening screw 2033 in the space between the substrate heat sink 2031 and the substrate base 2013. The structure is designed so that the gap between the heat sink 2031 of the outer substrate and the substrate base 2013 of the fastening screw 2033 are sealed by the sealing gasket 206 on the outside of the box 201, eliminating the path for the external air of the box 201 to contact the fastening screw 2033. At the same time, the sealing plug 205 seals the internal space of the box 201, eliminating the path for the internal air of the box 201 to contact the fastening screw 2033, so that the fastening screw 2033 is in a sealed space, preventing moisture in the air from condensing into liquid water on the low-temperature fastening screw 2033.

[0087] In this application, references Figure 5The outer surface of the housing 201 has an inwardly recessed mounting space 2018. A sealing gasket 206 is disposed within the mounting space 2018, allowing the sealing gasket 206 to be embedded in the housing 201. The surface of the refrigerant heat dissipation assembly 203 near the housing 201 is flush with the outer surface of the adjacent housing 201. The mounting space 2018 on the housing 201, with the sealing gasket 206 embedded within it, prevents the sealing gasket 206 from increasing the gap between the housing 201 and the refrigerant heat dissipation assembly 203, thus avoiding an increase in the thickness of the electrical control box assembly 200. This ensures a smaller overall volume for the electrical control box assembly 200, facilitating its installation within the outdoor unit housing 101 without obstructing the installation and layout of other structures within the outdoor unit housing 101. Since the refrigerant heat dissipation component 203 is flush with the surface of the housing 201, the refrigerant heat dissipation component 203 can cover most or completely cover the installation space 2018, hide the sealing gasket 206 inside, avoid the sealing gasket 206 being exposed, improve the life of the sealing gasket 206, and enhance the stability of the anti-condensation effect.

[0088] In this application, references Figure 2 and Figure 5 A sealing flange 2014 is provided on the surface of the housing 201 near the refrigerant heat dissipation assembly 203. The sealing flange 2014 is a raised structure on the surface of the housing 201 near the refrigerant heat dissipation assembly 203. The sealing flange 2014 surrounds the outer periphery of the refrigerant heat dissipation assembly 203 and extends from one end to the other, thereby forming a clearance notch 2015 between the two ends of the sealing flange 2014. The refrigerant heat dissipation assembly 203 can be inserted into the area enclosed by the sealing flange 2014 through the clearance notch 2015 until the refrigerant heat dissipation assembly 203 abuts against the corresponding side of the sealing flange 2014, at which point the sealing flange 2014 prevents further movement of the refrigerant heat dissipation assembly 203. This design allows the sealing flange 2014 to provide precise positioning and stable support for the installation of the refrigerant heat dissipation assembly 203; through the guidance and fixation of the sealing flange 2014, the refrigerant heat dissipation assembly 203 can be installed more accurately on the housing 201, ensuring a tight fit between it and the housing 201.

[0089] In this application, references Figure 2 The sealing flange 2014 fits tightly against the refrigerant heat dissipation component 203, ensuring close contact between the sealing flange 2014 and the outer surface of the corresponding refrigerant heat dissipation component 203. This structural design achieves initial sealing between the refrigerant heat dissipation component 203 and the housing 201 through the sealing flange 2014 itself. The double sealing cooperation between the sealing flange 2014 and the sealing gasket 206 forms a more reliable sealing system, effectively preventing air from entering the gap between the refrigerant heat dissipation component 203 and the housing 201.

[0090] In this application, references Figure 4 , Figure 5 and Figure 7 A mounting post 2016 is provided on the side wall of the housing 201 near the refrigerant heat dissipation assembly 203. The mounting post 2016 has a hollow structure, with one end open and the other end protruding into the electrical control cavity 2011. The mounting post 2016 has a mounting hole 2012, and the end of the fastening screw 2033 is located in the mounting post 2016. By installing the fastening screw 2033 in the mounting post 2016, the mounting post 2016 provides a large accommodating space for the end of the fastening screw 2033, so that the fastening screw 2033 is separated from the housing 201 by the air in the mounting post 2016. This design creates a thermal break structure, effectively blocking the transfer path of cold energy from the fastening screw 2033 to the housing 201. Since the fastening screw 2033 connects to the refrigerant heat sink 2032, its surface temperature is low. The design of the mounting post 2016 prevents this low temperature from being conducted to the housing 201 and its internal space, thus avoiding low-temperature areas inside the housing 201. Because the low temperature of the fastening screw 2033 is not conducted to the interior of the housing 201, moisture in the air cannot condense into liquid water inside the housing 201, thus preventing the electrical control box assembly 200 from being in a high-humidity environment. This design effectively prevents short circuits and corrosion of the substrate 202 caused by condensation, significantly improving the lifespan of electronic components and the reliability of the system.

[0091] In this application, references Figures 6 to 7 The end face of the sealing plug 205 near the refrigerant heat dissipation assembly 203 is fitted with the corresponding end face of the fastening screw 2033. This design allows the sealing plug and the fastening screw 2033 to fit tightly during installation, forming a compact structure. This reduces the overall size of the electrical control box assembly 200, thereby optimizing the overall structural layout of the outdoor unit. Furthermore, the covering of the fastening screw 2033 by the sealing plug 205 reduces the exposed surface area of ​​the fastening screw 2033. Since the fastening screw 2033 connects to the refrigerant heat dissipation block 2032, its surface temperature is low, making it prone to condensation of moisture in the air. The covering by the sealing plug 205 reduces the contact area between the fastening screw 2033 and the outside air, significantly reducing the likelihood of liquid water condensing on the surface of the fastening screw 2033.

[0092] In this application, references Figure 7The sealing plug 205 has a clearance groove 2051 on its end face near the refrigerant heat dissipation assembly 203, and the end of the fastening screw 2033 extends into the clearance groove 2051. This design provides a dedicated receiving space for the end of the fastening screw 2033, allowing the sealing plug and the fastening screw 2033 to achieve a precise fit during installation. This effectively prevents the fastening screw 2033 from loosening the sealing plug in the reverse direction or pushing it out of the mounting hole 2012. In addition, the design of the clearance groove 2051 allows the sealing plug and the fastening screw 2033 to partially overlap in the axial direction, further enhancing the bonding strength between them. It also allows the sealing plug to be installed closer to the refrigerant heat dissipation assembly 203. This not only optimizes the internal structure of the electrical control box assembly 200 but also reduces the thickness of the entire electrical box assembly. Without sacrificing sealing performance, the volume of the electrical control box assembly 200 is reduced, thereby freeing up more space for other components and improving the overall integration and reliability of the outdoor unit of the air conditioner.

[0093] In this application, references Figure 7 During installation, the end of the fastening screw 2033 extends into the relief groove 2051, expanding the groove and causing the screw to enlarge the end of the sealing plug 205 closest to the refrigerant heat dissipation component 203. This design utilizes the mechanical force of the screw 2033 to expand the sealing plug 205 within the mounting hole 2012, resulting in a tighter contact between the sealing plug 205 and the mounting hole 2012. This further enhances the sealing performance and reduces the possibility of air and moisture infiltration. Furthermore, because the outer diameter of the expanded end of the sealing plug 205 is larger than the inner diameter of the mounting hole 2012, the sealing plug 205 can form a locking mechanism on the side of the mounting hole 2012 closest to the refrigerant heat dissipation component 203. This locking design makes it more difficult for the sealing plug 205 to dislodge from the mounting hole 2012 under the reverse pushing action of the screw 2033, thus ensuring the stability of the sealing plug during long-term use.

[0094] In this application, references Figure 7 The sealing plug 205 and the mounting hole 2012 are connected by threads, that is, the outer surface of the sealing plug 205 is provided with external threads, and the inner surface of the mounting hole 2012 is provided with internal threads that mate with it. This connection method not only ensures the firmness of the sealing plug in the mounting hole 2012, but also improves the sealing effect through the tight fit of the threads.

[0095] In this application, references Figure 7The substrate 202 has a through groove 2021. The through groove 2021 is opposite to the mounting hole 2012, so that the two are coaxially aligned. The sealing plug 205 is installed in the mounting hole 2012 from the through groove 2021. This structural design allows the sealing plug 205 to be installed in both the through groove 2021 and the mounting hole 2012. The sealing plug 205 is fixed by two structures, which improves the stability of the installation of the sealing plug 205, and can better seal the mounting hole 205, thereby improving the overall sealing performance of the electrical control box assembly 200 and effectively preventing external air and moisture from entering the electrical control cavity.

[0096] In this application, references Figure 7 The sealing plug 205 is provided with a limiting flange 2052, which is a raised structure on the outer surface of the sealing plug 205. The limiting flange 2052 surrounds the sealing plug 205 in an annular shape. As the sealing plug 205 is gradually screwed into the mounting hole 2012, the sealing plug 205 moves towards the fastening screw 2033 and comes into close contact with the end face of the fastening screw 2033. The limiting flange 2052 abuts against the base plate 202, preventing the sealing plug 205 from moving further towards the fastening screw 2033. This structural design provides a clear stopping point for the sealing plug 205, effectively limiting the installation position of the sealing plug and preventing excessive displacement of the sealing plug 205 towards the fastening screw 2033 during installation or use. It also prevents the fastening screw 2033 from entering the clearance groove 2051 too much and prevents the fastening screw 2033 from causing the sealing plug to expand too much and crack. On the other hand, while limiting the axial displacement of the sealing plug 205, the limiting flange 2052 also seals the through groove 2021 more effectively through its close fit with the substrate 202, which significantly improves the moisture resistance of the electrical control box assembly 200, prevents the formation and infiltration of condensate, and thus better protects the electrical control box assembly 200 from the influence of a humid environment.

[0097] The compressor and outdoor fan in the outdoor unit of the air conditioner are controlled by an electrical control box assembly. To facilitate heat dissipation for the electrical components within the control box assembly, a refrigerant heat dissipation component is included. The base plate is a circuit board housing multiple electrical components. The refrigerant heat dissipation component includes a base plate heat sink and a refrigerant heat sink block. The control box assembly has a base plate seat, with the base plate and base plate heat sink positioned on opposite sides of the seat, placing them inside and outside the box, respectively. The refrigerant heat sink block is attached to the base plate heat sink with fastening screws. The refrigerant heat sink block is connected to the refrigerant circulation pipeline, allowing refrigerant to flow through it. The refrigerant absorbs and carries away the heat dissipated by the base plate through the refrigerant heat sink block and the base plate heat sink, ensuring the base plate temperature remains within a safe range.

[0098] For ease of assembly, the housing consists of a top cover and a base plate. The base plate is fixed to the base plate, and then the top cover is installed onto the base plate, allowing the base plate to be placed inside the housing. The base plate has mounting holes for installing and removing the fastening screws. However, when the outdoor unit of the air conditioner is a water-contaminated product and the indoor water temperature is low, the heat dissipation demand is low, or the refrigerant temperature is low, the temperature of the refrigerant heat sink is significantly lower than the ambient temperature. Since the fastening screws connect to the refrigerant heat sink, this results in the surface temperature of the fastening screws being too low. Moisture in the air comes into contact with the fastening screws through the mounting holes, causing it to condense into liquid water on its surface.

[0099] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0100] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0101] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0102] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An outdoor unit for an air conditioner, characterized in that, include: Outdoor unit casing; The electrical control box assembly is disposed inside the outdoor unit housing; the electrical control box assembly includes: The box body has an electrical control cavity formed inside it; the box body is provided with a mounting hole that connects the electrical control cavity to the space outside the box body. A substrate is disposed in the electronically controlled cavity; A refrigerant heat dissipation assembly, connected to the outside of the housing, is used to dissipate heat from the power devices on the substrate; the refrigerant heat dissipation assembly includes: The substrate heat sink is attached to the power device; A refrigerant heat sink is attached to the side of the substrate heat sink away from the power device; Fastening screws are used to connect the substrate heat sink to the refrigerant heat sink through the mounting holes; A sealing plug is disposed in the mounting hole to seal the mounting hole; A sealing gasket is connected between the heat sink on the substrate and the housing. The sealing gasket has screw holes for the fastening screws to pass through.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, An installation space is provided on the outer side of the box, and the sealing gasket is disposed in the installation space.

3. The outdoor unit of the air conditioner according to claim 2, characterized in that, A sealing flange is provided on the surface of the housing near the refrigerant heat dissipation component; the sealing flange surrounds the outer periphery of the refrigerant heat dissipation component.

4. The outdoor unit of the air conditioner according to claim 1, characterized in that, A mounting post is provided on the side wall of the housing near the refrigerant heat dissipation component. The mounting post protrudes into the electrical control cavity and has a mounting hole. The end of the fastening screw is located in the mounting post.

5. The outdoor unit of the air conditioner according to claim 1, characterized in that, The sealing plug has a relief groove on the end face near the refrigerant heat dissipation assembly, and the end of the fastening screw extends into the relief groove.

6. The outdoor unit of the air conditioner according to claim 5, characterized in that, The fastening screws expand the clearance groove.

7. The outdoor unit of the air conditioner according to claim 1, characterized in that, The sealing plug is threadedly connected to the mounting hole.

8. The outdoor unit of the air conditioner according to claim 7, characterized in that, The substrate is provided with a through groove, which is opposite to the mounting hole, and the sealing plug is installed in the mounting hole from the through groove.

9. The outdoor unit of the air conditioner according to claim 8, characterized in that, The sealing plug is provided with a limiting flange, which surrounds the sealing plug and abuts against the substrate to restrict the sealing plug from moving toward the refrigerant heat dissipation assembly.

10. An outdoor unit for an air conditioner, characterized in that, include: Outdoor unit casing; The electrical control box assembly is disposed inside the outdoor unit housing; the electrical control box assembly includes: The box body has an electrical control cavity formed inside it; the box body is provided with a mounting hole that connects the electrical control cavity to the space outside the box body. A substrate is disposed in the electronically controlled cavity; A refrigerant heat dissipation assembly, connected to the outside of the housing, is used to dissipate heat from the power devices on the substrate; the refrigerant heat dissipation assembly includes: The substrate heat sink is attached to the power device; A refrigerant heat sink is attached to the side of the substrate heat sink away from the power device; Fastening screws are used to connect the substrate heat sink to the refrigerant heat sink through the mounting holes; A sealing plug is disposed in the mounting hole to seal the mounting hole; A sealing gasket is connected between the heat sink of the substrate and the housing. The sealing gasket is provided with a screw through hole for the fastening screw to pass through. The side of the housing with the mounting hole, the sealing plug, and the sealing gasket form a sealing cavity, and the end of the fastening screw near the housing is located in the sealing cavity.

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