Air conditioner outdoor unit and air conditioner

Abstract

The present invention provides an air conditioner outdoor unit and an air conditioner, the air conditioner outdoor unit comprising an electrical box and a fan, the electrical box comprising a box body, an electrical component, and a heat sink, the electrical component being located within the box body, the heat sink having a first end connected to the electrical component and in contact with the electrical component for heat exchange, the heat sink having a second end extending outside the box body and located within the wind zone of the fan, the box body having an outer wall surface provided with a guide protrusion, the guide protrusion being spaced apart from the heat sink to form a guide air duct for the air flow, the guide air duct having an inlet end having a width greater than the outlet end of the guide air duct along the air flow direction. The electrical box in the air conditioner outdoor unit provided by the present invention has a good heat dissipation effect and does not affect the size of the electrical box and the air conditioner outdoor unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning outdoor unit and an air conditioner. Background Art

[0002] The electrical box in the air conditioner outdoor unit is used to control the operation of the air conditioner. If the temperature of the electrical components in the electrical box is too high, it will affect the stable operation of the air conditioner. Therefore, the electrical components in the electrical box need to be cooled.

[0003] In the prior art, heat sinks are commonly used to cool electrical components. Specifically, a control board is installed within the electrical box, and the electrical components are mounted on the board. Heat sinks are connected to the components, allowing heat generated by the components to be transferred to the heat sink. The fan in the air conditioner's outdoor unit drives airflow through the heat sink, exchanging heat between the airflow and the heat sink, lowering the heat sink temperature and dissipating heat from the electrical components.

[0004] However, in order to achieve a better heat dissipation effect, the size of the heat sink is usually increased, which results in a larger size of the electrical box and the air conditioner outdoor unit. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present invention provides an air conditioner outdoor unit and an air conditioner, which can optimize the heat dissipation effect of the electrical box of the air conditioner outdoor unit without increasing the size of the electrical box of the air conditioner.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A first aspect of an embodiment of the present invention provides an air-conditioning outdoor unit, which includes an electrical box and a fan, the electrical box including a box body, an electrical component and a heat sink, the electrical component is located in the box body, the first end of the heat sink is connected to the electrical component and contacts the electrical component for heat exchange, the second end of the heat sink extends to the outside of the box body, and the second end of the heat sink is located in the wind zone of the fan; a guide protrusion is provided on the outer wall surface of the box body, and the guide protrusion and the heat sink are spaced apart to form a guide air duct for the air flow to flow through, and the width of the inlet end of the guide air duct along the flow direction of the air flow is greater than the width of the outlet end of the guide air duct.

[0008] In some optional embodiments, the air guide duct includes an air guide section, and the inlet of the air guide section constitutes the inlet of the air guide duct; wherein the width of the air guide section gradually decreases along the flow direction of the airflow.

[0009] In some optional embodiments, there are multiple electrical components, and the multiple electrical components are arranged in sequence along the length direction of the air duct; the multiple electrical components include a target electrical component, the heat density of the target electrical component is greater than the heat density of other electrical components in the multiple electrical components, and the air guide section extends to the location of the target electrical component.

[0010] In some optional embodiments, the outlet end of the air guide section is located on the downstream side of the target electrical component along the airflow direction.

[0011] In some optional embodiments, an inclined surface for guiding flow is provided on the side of the guide protrusion facing the heat sink and / or the side of the heat sink facing the guide protrusion.

[0012] In some optional embodiments, the inclined surface includes an inclined plane and / or an inclined arc surface.

[0013] In some optional embodiments, when the inclined surface includes an inclined plane, there are multiple inclined planes, and the multiple inclined planes are sequentially connected along the length direction of the guide air duct, and an angle is formed between two adjacent inclined planes.

[0014] In some optional embodiments, the air-conditioning outdoor unit further includes a partition plate and a compressor, the fan and the compressor are respectively arranged on both sides of the partition plate, the partition plate is provided with a mounting hole through which the power supply box passes, and the heat sink is arranged on the side of the partition plate close to the fan; wherein, the partition plate is located on the outside of the air guide duct.

[0015] In some optional embodiments, the heat sink includes a heat conducting portion and a plurality of heat dissipating fins, the heat conducting portion is connected to the electrical component, and the plurality of heat dissipating fins are arranged in parallel and extend out of the box body; wherein, there is a heat dissipating gap between two adjacent fins for air flow, the heat dissipating gap and the air guide duct are interconnected, and there is an angle between the extension direction of the air guide duct and the extension direction of the heat dissipating gap.

[0016] In some optional embodiments, the extension direction of the air guide duct is perpendicular to the extension direction of the heat dissipation gap.

[0017] In some optional embodiments, the air conditioner outdoor unit further includes a heat conductive member, which is disposed between the heat conductive portion and the electrical component, and the heat generated by the electrical component can be conducted to the heat conductive portion through the heat conductive member.

[0018] Compared to the prior art, the air conditioner outdoor unit provided by the embodiments of the present invention has the following advantages: The air conditioner outdoor unit includes an electrical box and a fan, which is used to drive airflow. The electrical box includes a housing and electrical components disposed therein. The housing has heat dissipation holes formed at locations corresponding to the electrical components. The electrical box is provided with a heat sink, a first end of which is located within the housing and connected to the electrical components, and a second end of which extends outside the housing through the heat dissipation holes. This allows heat from the electrical components to be transferred to the exterior of the housing through the heat sink.

[0019] The box body is provided with a guide protrusion spaced apart from the heat sink. Thus, the gap between the guide protrusion and the heat sink forms a guide air duct, through which air can flow driven by the fan. Furthermore, the width of the guide air duct at the inlet end is greater than the width of the guide air duct at the outlet end. This allows the guide air duct to accommodate a larger inflow of air, allowing more air to exchange heat with the heat sink, thereby improving the heat dissipation efficiency of the electrical components without increasing the size of the electrical box or the air conditioner outdoor unit.

[0020] A second aspect of an embodiment of the present invention provides an air conditioner, which includes the air conditioner outdoor unit described in the first aspect.

[0021] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the air-conditioning outdoor unit and air conditioner provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the structure of the air conditioner outdoor unit provided by the embodiment of the present invention Figure 1 ;

[0024] Figure 2 The structure of the air conditioner outdoor unit provided by the embodiment of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 3 for Figure 1 and Figure 2 Schematic diagram of the exploded structure of the electrical box;

[0026] Figure 4 for Figure 1 A schematic diagram of the structure of an electrical box without an air guide section;

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 1 ;

[0028] Figure 6 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 2 ;

[0029] Figure 7 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 3 ;

[0030] Figure 8 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 4 ;

[0031] Figure 9 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 5 .

[0032] Reference numerals:

[0033] 10-Electrical box;

[0034] 11-box body; 111-flow guide protrusion; 112-heat dissipation hole;

[0035] 12-electrical component; 121-first electrical component; 122-second electrical component; 123-third electrical component; 124-fourth electrical component;

[0036] 13- heat sink; 131- heat conducting portion; 132- heat dissipation fins; 133- heat dissipation gap;

[0037] 14- air guide duct; 141- air guide section; 142- air outlet section;

[0038] 15- inclined surface; 151- inclined plane; 1511- first plane; 1512- second plane; 152- inclined arc surface;

[0039] 20- fan;

[0040] 30-partition plate; 31-mounting hole;

[0041] 40-condenser;

[0042] d1 - first spacing;

[0043] D-first length;

[0044] L-second length;

[0045] d2 - first width;

[0046] d3 - second spacing;

[0047] X-flow direction. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0049] In existing technology, the amount of heat exchange between airflow and heat sinks is related to the airflow rate and the heat sink's cooling area. The greater the airflow rate and the heat sink's cooling area, the greater the heat dissipation efficiency. To dissipate heat from electrical components promptly, fans can be increased to boost airflow rate or the size of the heat sink can be increased to increase the cooling area. However, this results in higher air conditioning power or a larger outdoor unit.

[0050] In view of this, the embodiment of the present application provides a guide air duct between the heat sink and the box body of the electrical box, and the inlet width of the guide air duct is greater than the outlet width. In this way, the flow rate of the air flow passing through the guide air duct is increased, the heat exchange between the air flow and the heat sink is increased, the heat dissipation effect of the electrical components is better, and the air conditioning power does not increase, and the size of the heat sink and the air conditioner outdoor unit is not affected.

[0051] Figure 1 Schematic diagram of the structure of the air conditioner outdoor unit provided by the embodiment of the present invention Figure 1 . Figure 2 The structure of the air conditioner outdoor unit provided by the embodiment of the present invention is shown in FIG. Figure 2 . Figure 3 for Figure 1 and Figure 2 Schematic diagram of the exploded structure of the electrical box. Figure 5 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 1 . Figure 6 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 2 . Figure 7 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 3 . Figure 8for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 4 . Figure 9 for Figure 1 Schematic diagram of the structure of the electrical box of the middle air guide section Figure 5 .

[0052] See also Figures 1 to 3 as well as Figures 5 to 9 The present embodiment provides an air-conditioning outdoor unit, which includes an electrical box 10 and a fan 20; the electrical box 10 includes a box body 11, an electrical component 12 and a heat sink 13, the electrical component 12 is located in the box body 11, a first end of the heat sink 13 is connected to the electrical component 12, and contacts and exchanges heat with the electrical component 12, a second end of the heat sink 13 extends to the outside of the box body 11, and the second end of the heat sink 13 is located in the wind zone of the fan 20; a guide protrusion 111 is provided on the outer wall surface of the box body 11, and the guide protrusion 111 is spaced apart from the heat sink 13 to form a guide duct 14 for air flow to flow through, and the width of the inlet end of the guide duct 14 along the air flow direction X is greater than the width of the outlet end of the guide duct 14.

[0053] Specifically, the outdoor unit of the air conditioner is a part of the air conditioner, which realizes cooling or heating by utilizing the heat absorption or heat release when the refrigerant switches between the gas phase and the liquid phase.

[0054] Taking a refrigeration air conditioner as an example, the air conditioner outdoor unit includes a fan 20, a compressor and a condenser 40, and the air conditioner indoor unit includes an evaporator (not shown). The refrigerant absorbs heat and evaporates in the evaporator, which reduces the indoor environment temperature. The refrigerant absorbs heat and turns into a gaseous state; the gaseous refrigerant enters the compressor for compression and is converted into a high-temperature and high-pressure gas; the high-temperature and high-pressure gaseous refrigerant then enters the condenser 40 for condensation, at which time the condenser 40 releases heat; the fan 20 drives the air flow, which can optimize the condensation effect of the condenser 40; the condensed refrigerant becomes a medium-temperature and high-pressure liquid, and the refrigerant can enter the evaporator after being throttled and cooled by the expansion valve to cool the indoor environment.

[0055] The air conditioner outdoor unit further includes an electrical box 10 , which includes a box body 11 and an electrical component 12 . The electrical component 12 is used to input a control signal to the air conditioner to control the operation of the air conditioner.

[0056] It is understandable that the temperature of the airflow after heat exchange with the condenser 40 can be 30°C-45°C, which is still lower than the temperature of the electrical device 12 before heat dissipation. Therefore, the electrical box 10 can be set at a downstream position of the condenser 40 along the flow direction X of the airflow. In this way, when the fan 20 drives the airflow, the condenser 40 can exchange heat with the airflow before the electrical device 12, and the airflow that has been heated by heat exchange with the condenser 40 can be heat exchanged with the electrical device 12 again to dissipate heat from the electrical device 12. That is, the airflow that exchanges heat with the electrical device 12 mentioned in this embodiment is the airflow that has been heated by heat exchange with the condenser 40.

[0057] The electrical box 10 is also provided with a heat dissipation hole 112 and a heat sink 13. The heat dissipation hole 112 is positioned opposite the electrical component 12 to dissipate heat. One end of the heat sink 13 is located within the box body 11 and connected to the electrical component 12. The other end of the heat sink 13 extends outside the box body 11 through the heat dissipation hole 112. The heat sink 13 and the heat dissipation hole 112 are sealed to prevent foreign matter such as water and dust from entering the box body 11 through the heat dissipation hole 112.

[0058] The outer wall of the box body 11 is provided with a guide protrusion 111, which is located on the side of the heat sink 13. In this way, the gap between the guide protrusion 111 and the heat sink 13 forms a guide air duct 14, and the fan 20 can drive the air flow to flow in the guide air duct 14.

[0059] When the air conditioner is operating, the heat generated by the electrical components 12 can be transferred to the heat sink 13 and then transferred to the outside of the housing 11 through the heat sink 13. Thus, when air flows through the air guide duct 14, the end of the heat sink 13 located outside the housing 11 exchanges heat with the airflow, causing the temperature of the end of the heat sink 13 located outside the housing 11 to drop. Heat from the end of the heat sink 13 located inside the housing 11 can continue to be transferred toward the end of the heat sink 13 located outside the housing 11. Thus, the temperature of the end of the heat sink 13 located inside the housing 11 drops, and the electrical components 12 can continue to transfer heat toward the heat sink 13, achieving continuous heat dissipation and cooling of the electrical components 12. This improves the heat dissipation effect of the electrical components 12 and prevents the air conditioner from overheating and shutting down due to excessive temperatures in the electrical components 12.

[0060] Furthermore, the air guide duct 14 does not increase the size of the electrical box 10 , thereby avoiding an increase in the cost of the electrical box 10 and the air conditioner outdoor unit.

[0061] The heat sink 13 may be a block-shaped structural member. Figure 3In some optional embodiments, the heat sink 13 includes a heat conducting portion 131 and a plurality of heat dissipating fins 132. The heat conducting portion 131 is connected to the electrical device 12. The plurality of heat dissipating fins 132 are arranged in parallel and extend out of the box body 11. A heat dissipating gap 133 for air flow is provided between two adjacent fins. The heat dissipating gap 133 is communicated with the air guide duct 14, and an angle is formed between the extension direction of the air guide duct 14 and the extension direction of the heat dissipating gap 133.

[0062] The heat conducting portion 131 is located within the heat dissipation holes 112 and is fixedly connected to the housing 11 or to the control board within the housing 11, for example, by bolts. Thus, the electrical components 12 and the heat dissipating fins 132 are disposed on opposite sides of the heat conducting portion 131. The heat dissipating fins 132 are located outside the housing 11 and exposed to the air, facilitating heat exchange with the air.

[0063] The sum of the outer wall areas of the plurality of heat dissipating fins 132 is large, the contact area between the plurality of heat dissipating fins 132 and the air is large, the heat exchange amount between the plurality of heat dissipating fins 132 and the air is large, and the heat dissipation effect of the electrical component 12 is better.

[0064] In some optional embodiments, the extension direction of the guide air duct 14 and the extension direction of the heat dissipation gap 133 form an angle, illustratively, the angle can be 30°-60°. In this way, the heat dissipation gap 133 and the guide air duct 14 are interconnected, and during the airflow flowing in the guide air duct 14, part of the airflow can turn and flow along the heat dissipation gap 133. When the airflow turns, the guide air duct 14 can disturb the airflow, preventing the airflow from forming a stable laminar state, and improving the heat exchange efficiency between the airflow and the heat dissipation fins 132.

[0065] In some alternative implementations, see Figure 2 and Figure 3 The extension direction of the guide air duct 14 is perpendicular to the extension direction of the heat dissipation gap 133. That is, the arrangement direction of the plurality of heat dissipation fins 132 is parallel to the extension direction of the guide air duct 14. In this way, the airflow in the guide air duct 14 has a larger turning angle, the guide air duct 14 has a better disturbing effect on the airflow, and the heat dissipation element 13 is easy to assemble.

[0066] In some optional embodiments, the air conditioner outdoor unit further includes a heat conducting member disposed between the heat conducting portion 131 and the electrical device 12, and the heat generated by the electrical device 12 can be conducted to the heat conducting portion 131 through the heat conducting member. In this way, the heat transfer efficiency between the electrical device 12 and the heat conducting portion 131 is high.

[0067] The material of the heat conducting member can be thermal grease, thermal silica gel, etc. The heat conducting member can be a sheet structure or can be made of a gel solidified.

[0068] The electrical device 12 and the heat conducting portion 131 can be fixedly connected by threaded fasteners to prevent the heat dissipating element 13 from moving relative to the electrical device 12, resulting in the electrical device 12 and the heat conducting portion 131 being separated from each other and the electrical device 12 being unable to dissipate heat in time.

[0069] In some optional embodiments, the width of the inlet end of the guide air duct 14 is greater than the width of the outlet end of the guide air duct 14. In this way, the width of the inlet end of the guide air duct 14 is larger, the flow rate of the airflow entering the guide air duct 14 is larger, and the flow rate of the airflow entering each heat dissipation gap 133 is also larger, the heat exchange between the airflow and the heat dissipation fins 132 is larger, and the heat dissipation efficiency of the electrical device 12 is improved.

[0070] The width of the air guide duct 14 can be reduced in a step-like manner along the air flow direction X. Figures 5 to 9 In some optional embodiments, the air guide duct 14 includes an air guide section 141, and the inlet of the air guide section 141 constitutes the inlet of the air guide duct 14; wherein the width of the air guide section 141 gradually decreases along the flow direction X of the airflow.

[0071] In this way, more air can enter the guide duct 14, and the air guide section 141 can also guide the airflow, directing part of the airflow to flow toward the heat dissipation gap 133, thereby increasing the heat exchange between the heat dissipation fins 132 and the airflow. At the same time, because the air guide section 141 has a gradual structure, it does not hinder the airflow, and the airflow in the guide duct 14 has better fluidity.

[0072] In some optional embodiments, there are multiple electrical devices 12, and the multiple electrical devices 12 are arranged in sequence along the length of the air guide duct 14. The multiple electrical devices 12 may include power modules (Intelligent Power Modules, IPMs), diodes, insulated gate bipolar transistors (IGBTs), rectifier bridges, etc. This embodiment does not limit the type, number, function, etc. of the electrical devices 12.

[0073] The plurality of electrical components 12 include a target electrical component, and the heat density of the target electrical component is greater than the heat density of other electrical components 12 in the plurality of electrical components 12 ; the air guide section 141 extends to the location of the target electrical component.

[0074] Heat density refers to the ratio of heat generation to heat area. When the heat density of an electrical device 12 is high, it generates more heat per unit time. In other words, the target electrical device generates more heat per unit time than other electrical devices 12. Therefore, the target electrical device requires a higher airflow rate to dissipate heat than other electrical devices 12 to avoid overheating, shortening its service life, or triggering an overheating alarm.

[0075] In some embodiments, the air guide duct 14 includes an outlet section 142 located downstream of the air guide section 141. The inlet of the outlet section 142 is connected to the outlet of the air guide section 141. As will be appreciated, the width of the air guide duct 14 suddenly decreases at the junction of the air guide section 141 and the outlet section 142. This significantly disturbs the airflow at the junction of the air guide section 141 and the outlet section 142, generating different velocities in all directions.

[0076] In this way, a relatively large airflow can be directed toward the heat sink 13. That is, a relatively large airflow flows through the location of the heat sink 13 corresponding to the target electrical component, and the location of the heat sink 13 corresponding to the target electrical component has a relatively large heat exchange capacity relative to other locations of the heat sink 13. In other words, although the target electrical component generates more heat than the other electrical components 12, after heat dissipation by the heat sink 13, the temperature of the target electrical component and the temperatures of the other electrical components 12 can be maintained within a preset range, and the temperature of the target electrical component will not be significantly higher than that of the other electrical components 12.

[0077] The outlet end of the air guiding section 141 may be arranged opposite to the target electrical component. For example, the outlet end of the air guiding section 141 corresponds to the middle position of the target electrical component along the airflow direction X.

[0078] In some optional embodiments, the outlet end of the air guide section 141 is located downstream of the target electrical component along the airflow direction X. A first distance d1 between the outlet end of the air guide section 141 and the downstream end surface of the target electrical component is 2 mm to 7 mm. For example, the first distance d1 can be 5 mm. This allows the disturbed airflow to cover the position of the heat sink 13 corresponding to the target electrical component, improving heat dissipation for the target electrical component.

[0079] In some optional embodiments, the width of the outlet section 142 gradually decreases as the target electrical component approaches the inlet end of the air guide duct 14 toward the outlet end. Specifically, the closer the target electrical component is to the upstream end of the air guide duct 14, the wider the outlet section 142 becomes. This allows for more airflow within the outlet section 142 and distributes it to different heat dissipation gaps 133. This allows for better heat dissipation for other electrical components 12 located downstream of the target electrical component.

[0080] The width of the air outlet section 142 can be set as needed. For example, the width of the air outlet section 142 can be determined by the two extreme lengths of the air guide section 141 and the length of the heat dissipation hole 112.

[0081] The first length of the heat dissipation hole 112 along the flow direction X is D, the second length of the air guide section 141 along the flow direction X is L, and the first width d2 of the air outlet section 142 is:

[0082]

[0083] Then, when the air guide duct 14 is not provided with the air guide section 141, please refer to Figure 4 , the second length L of the air guide section 141 along the flow direction X is zero. In this case, the first width d2 of the air outlet section 142 is 10 mm. When the second length L of the air guide section 141 along the flow direction X is the same as the first length D of the heat dissipation hole 112 along the flow direction X, the first width d2 of the air outlet section 142 is 3 mm. Thus, the first width d2 of the air outlet section 142 can vary between 3 mm and 10 mm. Of course, the first width d2 of the air outlet section 142 can also be defined in other ways, and this embodiment does not limit this.

[0084] In some optional embodiments, when the number of electrical components 12 is four, for ease of explanation, the four electrical components 12 are respectively a first electrical component 121, a second electrical component 122, a third electrical component 123 and a fourth electrical component 124, and the first electrical component 121, the second electrical component 122, the third electrical component 123 and the fourth electrical component 124 are arranged in sequence along the flow direction X of the airflow.

[0085] See also Figure 5 When the second electrical device 122 is the target electrical device, the second length L of the air guide section 141 along the air flow direction X is 0.45D, and then the first width d2 of the air outlet section 142 may be 6.85 mm.

[0086] See also Figure 6 and Figure 7When the third electrical device 123 is the target electrical device, the second length L of the air guide section 141 along the air flow direction X is 0.65D, and then the first width d2 of the air outlet section 142 may be 5.45 mm.

[0087] See also Figure 8 and Figure 9 When the fourth electrical device 124 is the target electrical device, the second length L of the air guiding section 141 along the air flow direction X is D, and then the first width d2 of the air outlet section 142 may be 3 mm.

[0088] To form the air guide section 141, in some optional embodiments, an inclined surface 15 for guiding air is provided on the side of the air guide protrusion 111 facing the heat sink 13 and / or on the side of the heat sink 13 facing the air guide protrusion 111. That is, the inclined surface 15 can be formed on the air guide protrusion 111, or on the heat sink 13, or on both the air guide protrusion 111 and the heat sink 13.

[0089] See also Figure 3 as well as Figures 5 to 9 In this embodiment, the inclined surface 15 is formed on the guide protrusion 111 as an example. When the airflow flows in the guide duct 14, the airflow can impact the inclined surface 15 on the guide protrusion 111. At the same time, under the reaction of the inclined surface 15, the airflow can generate component velocities in various directions. Part of the airflow flows toward the side of the heat dissipation gap 133 and enters the heat dissipation gap 133, and part of the airflow continues to flow along the guide duct 14. That is, by providing the inclined surface 15, the airflow rate entering the heat dissipation gap 133 can be increased, and the heat exchange between the airflow and the heat dissipation fins 132 can be improved. In addition, the shape of the heat sink 13 is relatively regular, and the manufacturing cost of the heat sink 13 is relatively low.

[0090] In some optional embodiments, the inclined surface 15 includes an inclined plane 151 and / or an inclined arc surface 152. That is, the inclined surface 15 can be an inclined plane 151 or an inclined arc surface 152, and the inclined surface 15 can also be composed of an inclined plane 151 and an inclined arc surface 152 connected together.

[0091] When the inclined surface 15 is an inclined arc surface 152, the inclined arc surface 152 can be convex toward the inner side of the air guide duct 14 or concave toward the side away from the air guide duct 14. The number of the inclined arc surface 152 can be one (eg Figure 7 Alternatively, the inclined arc surface 152 may also be multiple (as shown in FIG. Figure 9 shown).

[0092] Of course, when the inclined surface 15 is an inclined plane 151, the number of the inclined plane 151 can also be one (eg Figure 3 and Figure 5 as shown) or multiple (as shown Figure 6 and Figure 7 In some optional embodiments, when the inclined surface 15 includes multiple inclined planes 151, the multiple inclined planes 151 are sequentially connected along the airflow direction X, and an angle is formed between two adjacent inclined planes 151. In this way, the width of the guide air duct 14 decreases at the intersection of two adjacent inclined planes 151, causing disturbance to the airflow, and a larger airflow flows through the intersection of the heat sink 13 and the two inclined planes 151.

[0093] For example, see Figure 6 The plurality of inclined planes 151 can be referred to as first planes 1511 and second planes 1512. The first planes 1511 and second planes 1512 form an obtuse angle therebetween. Thus, the first planes 1511 and second planes 1512 can both disturb the airflow and guide it toward the heat dissipation gap 133, thereby increasing the flow rate within the heat dissipation gap 133 and the heat exchange between the airflow and the heat dissipation fins 132.

[0094] The number of inclined planes 151 can be set as needed. For example, each electrical component 12 can be provided with a corresponding inclined plane 151. In this way, a large amount of air can flow through the heat dissipation gap 133 corresponding to each electrical component 12, and each electrical component 12 can achieve a better heat dissipation effect.

[0095] In some optional embodiments, the air-conditioning outdoor unit further includes a partition plate 30 and a compressor, the fan 20 and the compressor are respectively arranged on both sides of the partition plate 30, the partition plate 30 is provided with a mounting hole 31 through which the power supply box 10 passes, and the heat sink 13 is arranged on the side of the partition plate 30 close to the fan 20; wherein, the partition plate 30 is located on the outside of the guide air duct 14.

[0096] The mounting holes 31 connect both sides of the partition plate 30, and the two ends of the electrical box 10 are located on either side of the partition plate 30. Thus, the multiple electrical components 12 within the electrical box 10 can be located on both sides of the partition plate 30 and connected to the compressor and fan 20, respectively. Since the fan 20 is located on the side of the partition plate 30 where the condenser 40 is located, the electrical components 12 to be dissipated (such as a rectifier bridge) are located on the side of the partition plate 30 where the condenser 40 is located, and the heat sink 13 is also located on the side of the partition plate 30 where the fan 20 is located.

[0097] The partition plate 30 may be a flat plate or an arc-shaped plate (see Figures 5 to 9 ), in order to prevent the partition plate 30 from affecting the air flow, after the electrical box 10 is installed on the partition plate 30, the partition plate 30 is located on the outside of the guide air duct 14.

[0098] For example, the partition plate 30 may be arranged flush with the inclined surface 15 of the guide protrusion 111 , or the partition plate 30 may be arranged on a side of the inclined surface 15 away from the heat sink 13 .

[0099] As will be appreciated, when air flows through the heat sink 13, some of the air will be lost to the compressor through the mounting hole 31. Therefore, in this embodiment, the second distance d3 between the inclined surface 15 on the guide protrusion 111 and the mounting hole 31 can be less than or equal to 10 mm. This reduces the distance between the inclined surface 15 and the partition plate 30, minimizing air loss.

[0100] This embodiment further provides an air conditioner, which includes the air conditioner outdoor unit of the first aspect. The structure, function and beneficial effects of the electrical box 10 in the air conditioner outdoor unit have been described in the above embodiment and will not be repeated in this embodiment.

[0101] The air conditioner adopts the air conditioner outdoor unit in the above embodiment, so that the heat dissipation effect of the electrical box 10 is better, thereby avoiding the air conditioner from shutting down due to overheating of the electrical component 12.

[0102] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0103] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioner outdoor unit, characterized in that: Including electrical box and fan; The electrical box includes a box body, an electrical component, and a heat sink. The electrical component is located in the box body. A first end of the heat sink is connected to the electrical component and contacts and exchanges heat with the electrical component. A second end of the heat sink extends to the outside of the box body and is located in the wind zone of the fan. A guide protrusion is provided on the outer wall surface of the box body, and the guide protrusion is spaced apart from the heat dissipation element to form a guide air duct for air flow to flow through. The width of the inlet end of the guide air duct along the air flow direction is greater than the width of the outlet end of the guide air duct; the guide air duct includes an air guide section and an air outlet section; An inclined surface for guiding flow is provided on the side of the guide protrusion facing the heat sink and / or the side of the heat sink facing the guide protrusion; When the inclined surface includes an inclined plane, there are multiple inclined planes, and the multiple inclined planes are sequentially connected along the length direction of the guide air duct, and an angle is formed between two adjacent inclined planes; The electrical box is provided with a heat dissipation hole, and the heat dissipation hole is sealedly connected to the heat dissipation element; The first length of the heat dissipation hole along the flow direction X is D, the second length of the air guide section along the flow direction X is L, and the first width d2 of the air outlet section is: 。 2. The air conditioner outdoor unit according to claim 1, characterized in that: The inlet of the air guide section constitutes the inlet of the air guide duct; Wherein, the width of the air guiding section gradually decreases along the flow direction of the airflow.

3. The air conditioner outdoor unit according to claim 2, characterized in that: There are multiple electrical components, and the multiple electrical components are arranged in sequence along the length direction of the air guide duct; The plurality of electrical components include a target electrical component, the heat density of the target electrical component is greater than the heat density of other electrical components in the plurality of electrical components, and the air guide section extends to a location of the target electrical component.

4. The air conditioner outdoor unit according to claim 3, characterized in that: An outlet end of the air guide section is located on a downstream side of the target electrical component along the airflow direction.

5. The air conditioner outdoor unit according to claim 1, characterized in that: The inclined surface includes an inclined plane and / or an inclined arc surface.

6. The air conditioner outdoor unit according to any one of claims 1 to 4, characterized in that: The air conditioner outdoor unit further includes a partition plate and a compressor, the fan and the compressor are respectively arranged on both sides of the partition plate, the partition plate is provided with a mounting hole for the electrical box to pass through, and the heat sink is arranged on a side of the partition plate close to the fan; Wherein, the partition plate is located outside the air guide duct.

7. The air conditioner outdoor unit according to any one of claims 1 to 4, characterized in that: The heat sink comprises a heat conducting portion and a plurality of heat dissipating fins, wherein the heat conducting portion is connected to the electrical component, and the plurality of heat dissipating fins are arranged in parallel and extend out of the box body; There is a heat dissipation gap between two adjacent fins for the air flow to flow, the heat dissipation gap is connected to the air guide duct, and an angle is formed between the extension direction of the air guide duct and the extension direction of the heat dissipation gap.

8. The air conditioner outdoor unit according to claim 7, characterized in that: The extension direction of the air guide duct is perpendicular to the extension direction of the heat dissipation gap.

9. The air conditioner outdoor unit according to claim 7, characterized in that: The air conditioner outdoor unit further includes a heat conducting member disposed between the heat conducting portion and the electrical component. Heat generated by the electrical component can be conducted to the heat conducting portion through the heat conducting member.

10. An air conditioner, characterized in that: The invention comprises an air-conditioning outdoor unit according to any one of claims 1 to 9.

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