Heat dissipation device, electric control device, outdoor unit and air conditioner

Abstract

The invention relates to a heat dissipation device, an electric control device, an outdoor unit and an air conditioner, and the heat dissipation device comprises a first radiator which is used for being connected with a power device in a heat conduction manner; and the second radiator is detachably connected with the first radiator, a refrigerant channel is arranged in the second radiator, and the refrigerant channel comprises at least one micro-channel. According to the heat dissipation device, compared with a traditional mode of adopting a refrigerant pipe, thermal resistance in the heat transfer process is reduced through the integrated design of the second heat dissipation device, and the heat dissipation effect is remarkably improved. Therefore, maintenance personnel can easily detach the second heat radiator from the first heat radiator for independent maintenance or replacement, the whole heat radiation system does not need to be integrally detached, the maintenance difficulty and cost are reduced, and the maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, in particular to a heat dissipation device, an electric control device, an outdoor unit and an air conditioner. BACKGROUND

[0002] The electric control board of the outdoor unit of an air conditioner is provided with a plurality of electronic components, including many heat-generating components with large heat dissipation, such as frequency conversion modules, etc. If these heat-generating components cannot be cooled, the failure rate of the heat-generating components themselves and the surrounding electronic components will be greatly increased. The commonly used heat dissipation technologies include natural heat dissipation and refrigerant heat dissipation. The natural heat dissipation has the disadvantage of poor effect, and the heat-generating components are prone to damage and have short service life due to high temperature rise. The refrigerant heat dissipation is usually performed through refrigerant pipes, and the effect of the refrigerant heat dissipation is better than that of the natural heat dissipation, which can effectively reduce the temperature of the heat-generating components and prolong the service life of the heat-generating components. However, the heat exchange efficiency between the refrigerant pipe and the heat-generating component in the existing refrigerant heat dissipation technology is low, resulting in poor heat dissipation effect. SUMMARY

[0003] The purpose of the present application is to at least solve the problem of low heat exchange efficiency between the refrigerant pipe and the heat-generating component in the existing refrigerant heat dissipation technology. The purpose is achieved in the following way:

[0004] The first aspect of the present application provides a heat dissipation device, which comprises: a first heat sink, which is in thermal conductive connection with a power device; and a second heat sink, which is detachably connected in thermal conduction with the first heat sink, and has a refrigerant channel for refrigerant flow in the interior thereof, the refrigerant channel comprising at least one microchannel.

[0005] Compared with the conventional method of using a refrigerant pipe, the integrated design of the second heat sink of the heat dissipation device according to the present application reduces the thermal resistance in the heat transfer process, so that the heat can be more smoothly transferred from the power device to the refrigerant, thereby significantly improving the heat dissipation effect and ensuring that the power device is always in an appropriate working temperature range. When the second heat sink fails or needs to be maintained, maintenance personnel can easily detach the second heat sink from the first heat sink for separate maintenance or replacement, without the need to disassemble the entire heat dissipation system, thereby greatly reducing the difficulty and cost of maintenance and improving the efficiency of maintenance.

[0006] In addition, the heat dissipation device according to the present application can also have the following additional technical features:

[0007] In some embodiments of the present application, the second heat sink is provided with a plurality of microchannels; or the second heat sink is provided with a receiving hole, and a heat conduction pipe is arranged in the receiving hole, and the heat conduction pipe has at least one microchannel for refrigerant flow in the interior thereof.

[0008] In some embodiments of the present invention, the first heat sink has an oppositely arranged mounting side and a heat-conducting side, the heat-conducting side being used for thermally connecting with the power device, and the second heat sink being detachably mounted on the mounting side.

[0009] In some embodiments of the present invention, the first heat sink is provided with a plurality of first fixing holes that pass through the mounting side and the heat-conducting side, and the second heat sink is provided with a plurality of second fixing holes that correspond one-to-one with the first fixing holes. The first fixing holes and the second fixing holes are used for connecting members to pass through to connect the first heat sink and the second heat sink.

[0010] In some embodiments of the present invention, at least one of the second fixing holes forms a notch at the edge of the second heat sink along a direction perpendicular to the through direction of the second fixing hole.

[0011] In some embodiments of the present invention, the heat-conducting side includes a heat-conducting surface and a clearance groove. Along a direction parallel to the heat-conducting surface, the clearance groove is disposed on at least one side of the heat-conducting surface, and the heat-conducting surface is used for heat-conducting connection with the power device.

[0012] In some embodiments of the present invention, the first heat sink is further provided with a plurality of connecting holes that pass through the mounting side and the heat-conducting side.

[0013] In some embodiments of the present invention, the second radiator is further provided with a communication channel with the refrigerant channel.

[0014] The device includes a refrigerant inlet and a refrigerant outlet; the heat dissipation device also includes a first connecting pipe assembly and a second connecting pipe assembly, the first connecting pipe assembly being inserted into the refrigerant inlet and communicating with the refrigerant channel, and the second connecting pipe assembly being inserted into the refrigerant outlet and communicating with the refrigerant channel.

[0015] In some embodiments of the present invention, the second heat sink is made of the same material as the first pipe assembly; and / or the second heat sink is made of the same material as the second pipe assembly.

[0016] In some embodiments of the present invention, the refrigerant inlet and the refrigerant outlet are located on the same side of the second radiator; or, the refrigerant inlet and the refrigerant outlet are located on two opposite sides of the second radiator; or, the refrigerant inlet and the refrigerant outlet are located on two adjacent sides of the second radiator.

[0017] In some embodiments of the present application, the second heat sink comprises a first side and a second side arranged oppositely; the refrigerant channel is in a straight structure and penetrates through the first side and the second side, one of the first side and the second side is provided with the refrigerant inlet, and the other is provided with the refrigerant outlet, and the two ends of the refrigerant channel are communicated with the refrigerant inlet and the refrigerant outlet respectively.

[0018] In some embodiments of the present application, the refrigerant channel is in a winding structure; the second heat sink comprises a first side and a second side arranged oppositely, one of the refrigerant inlet and the refrigerant outlet is arranged on the first side, the other is arranged on the second side, or both of the refrigerant inlet and the refrigerant outlet are arranged on one of the first side and the second side, and the two ends of the refrigerant channel are communicated with the refrigerant inlet and the refrigerant outlet respectively.

[0019] In some embodiments of the present application, the refrigerant channel comprises a first branch, a second branch and a main path, the refrigerant inlet and the refrigerant outlet are both located on the first side, the two ends of the first branch are communicated with the refrigerant inlet and one end of the main path respectively, the two ends of the second branch are communicated with the refrigerant outlet and the other end of the main path respectively; the second side is provided with a slot, at least part of the slot forms the main path, and the heat dissipation device further comprises a blocking head connected with the second heat sink and blocking the slot.

[0020] In some embodiments of the present application, the slot comprises a first segment and a second segment communicated with each other, the first segment is communicated with the first branch and the second branch respectively, the inner diameter of the first segment is smaller than that of the second segment, and a stepped surface is formed between the first segment and the second segment, and the blocking head is inserted into the second segment and sealedly connected with the stepped surface.

[0021] In some embodiments of the present application, the first branch is provided with a plurality of separation portions extending along the length direction of the first branch and separating the first branch into a plurality of independent micro-channels, and each micro-channel is communicated with the main path; and / or, the second branch is provided with a plurality of separation portions extending along the length direction of the second branch and separating the second branch into a plurality of independent micro-channels, and each micro-channel is communicated with the main path.

[0022] In some embodiments of the present application, the radial dimension of the refrigerant channel along a first direction is greater than the radial dimension of the refrigerant channel along a second direction, the first direction and the second direction are perpendicular to the extension direction of the refrigerant channel respectively, and the first direction is perpendicular to the second direction.

[0023] In some embodiments of the present application, the first direction is parallel to the heat-conducting side, and the second direction is from the mounting side to the heat-conducting side.

[0024] In some embodiments of the present application, the radial dimension of the refrigerant inlet along the first direction is greater than the radial dimension of the refrigerant inlet along the second direction, the first pipe assembly includes a first inner pipe, one end of the first inner pipe is matched with the profile of the refrigerant inlet and is in sealing connection with the refrigerant inlet, and the other end of the first inner pipe is configured as a circular tube structure.

[0025] In some embodiments of the present application, the first pipe assembly further includes a first sealing sleeve, one end of the first sealing sleeve is sleeved outside the first inner pipe, and the other end of the first sealing sleeve is used for sleeving outside a refrigerant conveying pipe of a refrigerant circulation pipeline.

[0026] In some embodiments of the present application, the radial dimension of the refrigerant outlet along the first direction is greater than the radial dimension of the refrigerant outlet along the second direction, the second pipe assembly includes a second inner pipe, one end of the second inner pipe is matched with the profile of the refrigerant outlet and is in sealing connection with the refrigerant outlet, and the other end of the second inner pipe is configured as a circular tube structure.

[0027] In some embodiments of the present application, the second pipe assembly further includes a second sealing sleeve, one end of the second sealing sleeve is sleeved outside the second inner pipe, and the other end of the second sealing sleeve is used for sleeving outside a refrigerant conveying pipe of a refrigerant circulation pipeline.

[0028] In some embodiments of the present application, the inner wall of the refrigerant channel is provided with a plurality of groove structures, and the plurality of groove structures are distributed at intervals on the inner wall of the refrigerant channel.

[0029] In some embodiments of the present application, the groove structure is in a strip shape, and the extension direction of the groove structure is parallel to the extension direction of the refrigerant channel.

[0030] In some embodiments of the present application, each groove structure extends from one end of the refrigerant channel to the other end of the refrigerant channel.

[0031] In some embodiments of the present application, the second heat sink and the refrigerant channel are integrally formed.

[0032] The second aspect of the present application further proposes an electric control device, which includes a main board, a power device, and the heat dissipation device of the first aspect, the power device is arranged on the main board and is in heat-conducting connection with the first heat sink in the heat dissipation device.

[0033] In some embodiments of the present application, the electric control device further comprises a support enclosure, which is mounted on the main plate, and an installation area and a support part are arranged at one end of the support enclosure away from the main plate, the power device is mounted on the installation area, and the pins of the power device are electrically connected with the main plate, and the first heat sink is mounted on the support part, and the power device is clamped between the support enclosure and the first heat sink.

[0034] The third aspect of the present application further provides an outdoor unit, which comprises the electric control device according to the second aspect.

[0035] In some embodiments of the present application, the outdoor unit further comprises a cabinet, an inner part of the cabinet forms an accommodating cavity, a partition assembly is arranged in the accommodating cavity and separates the accommodating cavity into a first cavity and a second cavity, and a fan is arranged in the first cavity; wherein the electric control device is mounted on the partition assembly and located in the second cavity, the cabinet is provided with an air-cooled air inlet, the partition assembly is provided with an air-cooled air outlet, the air-cooled air inlet communicates the second cavity with the outside, and the air-cooled air outlet communicates the first cavity and the second cavity.

[0036] The fourth aspect of the present application further provides an air conditioner, which comprises a refrigerant circulation pipeline and the outdoor unit according to the third aspect, and the refrigerant circulation pipeline is in communication with the refrigerant channel. BRIEF DESCRIPTION OF DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not intended to limit the scope of the application. Furthermore, the same reference numerals are used throughout the drawings to represent similar components. In which:

[0038] Figure 1 Structure schematic view of the heat dissipation device from one perspective of an embodiment of the present application;

[0039] Figure 2 Structure schematic view of the heat dissipation device from one perspective of an embodiment of the present application;

[0040] Figure 3 Structure schematic view of the first heat sink and the second heat sink from one perspective of an embodiment of the present application;

[0041] Figure 4 Structure schematic view of the second heat sink and the plugging head from one perspective of an embodiment of the present application;

[0042] Figure 5 Local structure schematic view of the second heat sink and the plugging head of an embodiment of the present application;

[0043] Figure 6 This is a schematic cross-sectional view of the second heat sink along the first direction according to an embodiment of the present invention.

[0044] Figure 7 This is a schematic cross-sectional view of the second radiator along the extension direction of the refrigerant channel according to an embodiment of the present invention.

[0045] Figure 8 This is a schematic diagram of the structure of the first connecting pipe assembly and the refrigerant delivery pipe according to an embodiment of the present invention;

[0046] Figure 9 This is a schematic diagram of the structure of the second connecting pipe assembly and the refrigerant return pipe according to an embodiment of the present invention;

[0047] Figure 10 This is a schematic diagram of the structure of an electronic control device according to an embodiment of the present invention;

[0048] Figure 11 This is a schematic diagram of the supporting fence structure from one perspective of an embodiment of the present invention;

[0049] Figure 12 This is a schematic diagram of the supporting fence structure from another perspective of an embodiment of the present invention;

[0050] Figure 13 This is a schematic diagram of the outdoor unit structure after removing the top cover and front panel, from one perspective according to an embodiment of the present invention;

[0051] Figure 14 This is a schematic diagram of the outdoor unit structure after removing the top cover and front panel, from another perspective of an embodiment of the present invention;

[0052] Figure 15 This is a schematic diagram of the structure of the electronic control device and the partition according to an embodiment of the present invention;

[0053] Figure 16 It shows Figure 10 A schematic diagram of the cross-sectional structure of section AA;

[0054] Figure 17 This is a partial structural schematic diagram of an outdoor unit according to an embodiment of the present invention;

[0055] Figure 18 This is a schematic diagram of the structure of an outdoor unit according to an embodiment of the present invention.

[0056] The labels in the attached diagram are as follows:

[0057] 300. Heat dissipation device;

[0058] 34. First heat sink; 341. Mounting side; 342. Heat-conducting side; 3421. Heat-conducting surface; 343. First fixing hole; 344. Clearance groove; 345. Connection hole;

[0059] 35. The second heat sink; 351. The refrigerant passage; 3511. The first branch; 3512. The second branch; 3513. The main path; 35131. The first section; 35132. The second section; 35133. The stepped surface; 35134. The opening; 352. The second fixing hole; 3521. The gap; 353. The refrigerant inlet; 354. The refrigerant outlet; 355. The first side surface; 356. The second side surface; 3514. The separation part; 3515. The groove structure; 35130. The slot; 35101. The microchannel;

[0060] 36. The first connector assembly; 361. The first inner connector; 3611. The first plug-in section; 3612. The first transition section; 3613. The first main body section; 3614. The first connection section; 362. The first sealing sleeve;

[0061] 37. The second connector assembly; 371. The second inner connector; 3711. The second plug-in section; 3712. The second transition section; 3713. The second main body section; 3714. The second connection section; 372. The second sealing sleeve;

[0062] 38. The blanking head;

[0063] 30. The electric control device; 31. The electric control support; 32. The main board; 315. The transition air outlet;

[0064] 80. The support fence; 801. The mounting area; 802. The support part; 81. The support main body; 82. The fence structure;

[0065] 1. The outdoor unit;

[0066] 10. The box body; 101. The containing cavity; 1011. The first cavity; 1012. The second cavity; 10121. The air cooling cavity; 10122. The air outlet cavity;

[0067] 12. The front panel; 111. The bottom plate; 14. The top cover; 131. The left side plate; 132. The right side plate;

[0068] 160. The partition assembly; 16. The partition; 1610. The air cooling air outlet;

[0069] 680. The fan;

[0070] 400. The refrigerant circulation pipeline; 401. The refrigerant conveying pipe; 402. The refrigerant return pipe;

[0071] X. The extension direction of the refrigerant passage; Y. The first direction; Z. The second direction. DETAILED DESCRIPTION

[0072] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it is to be understood that the application is not limited to the embodiments described herein, but can be practiced with variation within the spirit and scope of the present application, as described in the claims. Rather, the embodiments are provided as examples to more completely explain the present application and to provide a complete disclosure of the application to those skilled in the art.

[0073] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are to be construed to be inclusive (i.e., to include one or more elements or steps) unless otherwise indicated as being exclusive (i.e., requiring one of an exclusive group of elements or steps to be present but not allowing for more than one of the elements or steps). The methods described herein can be implemented as a method, an apparatus, a computer program product, or any combination thereof.

[0074] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0075] In this application, unless otherwise specified and limited, the terms "mounting", "connection", "connecting", "fixed", and the like, should be understood broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] For the sake of description, spatial relative terms can be used herein for the purpose of describing one element or feature's relationship to another element or feature as illustrated in the figures. Such relative terms include, but are not limited to, "inner", "outer", "inward", "outward", "lower", "bottom", "upper", "top", etc. These spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. Embodiments of the present application will not be described with reference to a particular spatial orientation of the device.

[0077] According to an embodiment of the present application, a heat dissipation device 300 is provided, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 7 The heat dissipation device 300 includes a first heat sink 34 and a second heat sink 35. The first heat sink 34 is used to be in thermal connection with the power device on the mainboard 32, so as to ensure that the heat generated by the power device during operation can be efficiently transferred to the first heat sink 34. The second heat sink 35 is detachably connected with the first heat sink 34. The detachable connection includes, but is not limited to, snap connection, threaded connection and other convenient and reliable connection structures, so that the first heat sink 34 and the second heat sink 35 can be closely connected, and can be easily separated when the second heat sink 35 needs to be maintained. The second heat sink 35 is internally provided with a refrigerant channel 351, which is externally connected with a refrigerant circulation pipeline. The second heat sink 35 is an integrated structure obtained by metal processing of a piece of metal material. When the external refrigerant circulation pipeline is connected with the refrigerant channel 351, the refrigerant can circulate in the refrigerant channel 351, and the refrigerant changes phase, absorbs a large amount of heat during the phase change, and rapidly carries away the heat generated by the power device transferred by the first heat sink 34, so as to realize efficient heat dissipation of the power device.

[0078] The refrigerant channel 351 of the integrated structure is directly formed on the second heat sink 35, which greatly improves the heat exchange efficiency compared with the traditional refrigerant pipe. The integrated design of the second heat sink 35 reduces the thermal resistance in the heat transfer process, so that the heat can be more smoothly transferred from the power device to the refrigerant, thereby significantly improving the heat dissipation effect and ensuring that the power device is always in the appropriate working temperature range. When the second heat sink 35 fails or needs to be maintained, the maintenance personnel can easily detach the second heat sink 35 from the first heat sink 34 for individual maintenance or replacement, without the need to disassemble the entire heat dissipation system, greatly reducing the difficulty and cost of maintenance, improving the maintenance efficiency, and providing a strong guarantee for the long-term stable operation of the product.

[0079] It should be noted that, please combine Figure 5 and Figure 6 It is shown that the refrigerant channel 351 includes at least one microchannel 35101, and the microchannel 35101 has a large specific surface area, which can make the refrigerant fully contact with the wall surface of the second heat sink 35, enhance the heat transfer effect, effectively improve the heat dissipation efficiency, and quickly reduce the temperature of the electronic control device. Among them, the refrigerant channel 351 is arranged to include a plurality of microchannels 35101, which utilizes the compact structure of the microchannel 35101 to arrange more channels in a limited space, increase the contact area of the refrigerant and the power device, improve the heat dissipation performance, and reduce the volume and weight of the second heat sink 35, facilitating installation in the space-compact electronic control equipment.

[0080] Among them, the microchannel 35101 refers to a channel structure with a hydraulic diameter in the order of microns to millimeters. Generally, the diameter of the microchannel 35101 is usually between 100 microns and 10 millimeters, which increases the contact area of the fluid and the channel wall, so that the heat can be more effectively transferred. The diameter of the microchannel 35101 in the present application can be set according to the size of the power device, which is not specifically limited here.

[0081] It should be noted that in the present embodiment, the shape of the microchannel 35101 can be circular, rectangular, triangular, etc., and can also be designed into various special shapes such as trapezoidal, wavy, etc. according to the heat dissipation requirements. Among them, the heat conduction connection between the power device and the first heat sink 34 includes various ways, for example, the heat conduction side 342 of the power device and the first heat sink 34 can be connected by directly pasting the plane, when the two planes are tightly pasted, the heat can be transmitted from the power device to the first heat sink 34 through the heat conduction of the solid. For example, a heat-conducting paste is applied to the contact surface between the power device and the first heat sink 34, the heat-conducting paste is a paste-like material with high thermal conductivity, usually containing metal particles or other high-thermal-conductivity substances. The heat-conducting paste can fill the microscopic bumps between the power device and the first heat sink 34, eliminate the gap, and form a continuous heat conduction path. When the power device works and generates heat, the heat will be transmitted to the first heat sink 34 through the heat-conducting paste. In other embodiments, a heat-conducting pad can also be provided between the power device and the first heat sink 34, which is a soft sheet material with good heat conductivity and elasticity. The heat-conducting pad is placed between the power device and the first heat sink 34, and the heat-conducting pad fills the gap between the two by extrusion. The heat-conducting pad can provide uniform pressure between power devices and heat sinks of different shapes and sizes, ensuring good heat conduction. At the same time, the heat-conducting pad can also play a buffering and damping role, reducing damage between the power device and the first heat sink 34 due to vibration or mechanical stress.

[0082] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 7 , the first heat sink 34 and the second heat sink 35 are in a plate-like structure, which helps the heat dissipation device 300 to provide a larger heat dissipation area in a limited space. In detail, the first heat sink 34 has an installation side 341 and a heat conduction side 342 arranged oppositely, the installation side 341 and the heat conduction side 342 are parallel and spaced apart, and the heat conduction side 342 is in heat conduction with the power device on the mainboard 32. Since the power device generates a large amount of heat during operation, the heat conduction side 342 tightly contacts the power device and rapidly absorbs and transmits the heat generated by the power device to the overall structure of the first heat sink 34 by using the principle of heat conduction. The second heat sink 35 is detachably mounted on the installation side 341 of the first heat sink 34, and the detachable connection includes buckle connection and bolt connection, etc. When the power device works and generates heat, the heat is first transmitted to the first heat sink 34 through the heat conduction side 342 and diffused to the overall structure of the first heat sink 34. The refrigerant circulation pipeline is in communication with the refrigerant passage 351 of the second heat sink 35, and the refrigerant circulates and flows in the refrigerant passage 351 and undergoes phase change, using the characteristics of absorbing a large amount of heat during the phase change of the refrigerant, the heat transmitted by the first heat sink 34 is rapidly taken away, thereby realizing efficient heat dissipation of the power device.

[0083] In the embodiment, the second heat sink 35 is located on the side of the first heat sink 34 away from the mainboard 32 and the power device, so that the second heat sink 35 is convenient to disassemble and assemble, and the operator has more operation space when repairing or replacing the second heat sink in the later stage, thereby reducing the difficulty of repair and disassembly.

[0084] It should be further pointed out that, in the embodiment, the first heat sink 34 is in thermal connection with the second heat sink 35, and the thermal connection between the second heat sink 35 and the first heat sink 34 includes various modes. For example, the heat-conducting side 342 of the second heat sink 35 and the first heat sink 34 can be in thermal connection by directly adhering the two planes, and when the two planes are closely adhered, heat can be transferred from the first heat sink 34 to the second heat sink 35 through the heat conduction of the solid. For another example, a heat-conducting paste is applied on the contact surface of the second heat sink 35 and the first heat sink 34, the heat-conducting paste is a paste-like material with high thermal conductivity, and usually contains metal particles or other high-thermal-conductivity substances. The heat-conducting paste can fill the microscopic concave-convex unevenness between the second heat sink 35 and the first heat sink 34, eliminate the gap, and form a continuous heat-conducting path. When the power device works to generate heat and the heat is transferred to the first heat sink 34, the heat of the first heat sink 34 is transferred to the second heat sink 35 through the heat-conducting paste. In some other embodiments, a heat-conducting pad can also be arranged between the second heat sink 35 and the first heat sink 34, the heat-conducting pad is a soft sheet-like material with good thermal conductivity and elasticity, and the heat-conducting pad is placed between the second heat sink 35 and the first heat sink 34 to fill the gap between the two by extrusion. The heat-conducting pad can provide uniform pressure between the second heat sink 35 and the first heat sink 34 of different shapes and sizes, and ensure good heat conduction. At the same time, the heat-conducting pad can also play a role of buffering and shock absorption, and reduce the damage between the second heat sink 35 and the first heat sink 34 caused by vibration or mechanical stress.

[0085] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3As shown, the first heat sink 34 is provided with a plurality of first fixing holes 343 penetrating through the mounting side 341 and the heat conduction side 342, the number of the first fixing holes 343 can be set arbitrarily, in the embodiment, a plurality of first fixing holes 343 are arranged close to the edge of the first heat sink 34, the second heat sink 35 is provided with a plurality of second fixing holes 352, the plurality of second fixing holes 352 correspond to the first fixing holes 343 one by one, each second fixing hole 352 avoids the refrigerant channel 351 and is distributed on both sides of the refrigerant channel 351. A plurality of connecting pieces pass through the first fixing holes 343 and the second fixing holes 352 in turn to connect the first heat sink 34 and the second heat sink 35. In some embodiments, the connecting piece includes a bolt and a nut, the bolt passes through the first fixing hole 343 and the second fixing hole 352, and then is tightened by the nut on the other side, the axial tension generated by rotating the nut tightly fixes the two heat sinks together. Alternatively, the first fixing hole 343 is a threaded hole, the second fixing hole 352 is a through hole, and the connecting piece includes a bolt, which is inserted into the second fixing hole 352 and arranged in the first fixing hole 343, and the bolt is screwed with the first fixing hole 343, the axial tension generated by rotating the bolt tightly fixes the two heat sinks together. In other embodiments, the connecting piece can also be a pin, which is directly inserted into the first fixing hole 343 and the second fixing hole 352 when connected, and relies on the friction force between the pin and the hole wall to fix the two heat sinks.

[0086] In some embodiments, as shown in Figure 2 and Figure 3 As shown, in the direction perpendicular to the penetrating direction of the second fixing hole 352, at least one second fixing hole 352 forms an opening 3521 at the edge of the second heat sink 35. Understandably, due to the limited space inside the air conditioner outdoor unit 1, and other electronic components, pipelines and other components around the heat sink, it is difficult to ensure that the connecting piece can be smoothly inserted into the fixing hole during installation, especially when the installation space along the penetrating direction of the second fixing hole 352 is small and the position is relatively hidden, the installer may need to spend a lot of time and effort to adjust the position of the connecting piece to make it accurately inserted into the hole. In the embodiment, the second fixing hole 352 forms an opening 3521 at the edge of the second heat sink 35, the connecting piece can be moved laterally into the second fixing hole 352 through the opening 3521, so that the connecting piece does not need to be accurately aligned with the fixing hole as in the traditional way during installation. The installer can first place the connecting piece near the opening 3521, and then send the connecting piece into the second fixing hole 352 by lateral movement, greatly reducing the difficulty of installation. Moreover, due to the narrow and complex layout of the space inside the air conditioner outdoor unit 1, the opening 3521 can effectively utilize the limited space, and the installer can operate the connecting piece in a relatively loose space, reducing the installation obstacles caused by space limitations, significantly improving the installation speed and reducing the installation time.

[0087] In some embodiments, as shown in Figure 2 , Figure 3 , Figure 10 and Figure 11 , the heat-conducting side 342 comprises a heat-conducting surface 3421 and a clearance groove 344 arranged around at least one side of the heat-conducting surface 3421, and the first fixing hole 343 is arranged inside the clearance groove 344. The heat-conducting surface 3421 is used for heat-conducting connection with the power device, and the clearance groove 344 extends from the heat-conducting surface 3421 to the edge of the first heat sink 34. The clearance groove 344 can be arranged on one side of the heat-conducting surface 3421, or on both sides of the heat-conducting surface 3421, or around the heat-conducting surface 3421. In this embodiment, the purpose of arranging the clearance groove 344 is to provide a clearance space for glue filling in the area between the main board 32 and the first heat sink 34. In detail, without the clearance groove 344, when glue needs to be filled between the main board 32 and the first heat sink 34, the glue will be blocked by the heat sink, and it is difficult to uniformly fill the entire area that needs to be sealed or fixed. Especially at the position close to the edge of the heat-conducting surface 3421 of the heat sink, the glue may not flow smoothly, resulting in insufficient glue filling. Therefore, by arranging the clearance groove 344, the distance between the edge of the main board 32 and the first heat sink 34 is increased, which not only facilitates the edge glue filling operation, but also enables the glue to fully fill the area between the main board 32 and the first heat sink 34.

[0088] In some embodiments, as shown in Figure 3 and Figure 10 , the first heat sink 34 is further provided with a plurality of connection holes 345 penetrating the mounting side 341 and the heat-conducting side 342. The main function of the connection holes 345 is to fix the first heat sink 34 to the support fence 80 through connecting members such as bolts, rivets, etc. In the running environment of the air conditioner outdoor unit 1, various external forces will act on it, such as vibration generated by the machine itself, influence of external wind force, etc. By firmly fixing the first heat sink 34 to the support fence 80 through the connection holes 345, the relative position between the first heat sink 34 and the main board 32 can be kept stable, and displacement will not occur due to these external forces, ensuring that the power device can always maintain good heat-conducting contact with the first heat sink 34, and ensuring the stability of heat dissipation.

[0089] In some embodiments, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, the second heat sink 35 is further provided with a refrigerant inlet 353 and a refrigerant outlet 354 which are in communication with the refrigerant channel 351. The refrigerant inlet 353 is used to introduce external refrigerant into the refrigerant channel 351 of the second heat sink 35, while the refrigerant outlet 354 is used to discharge the refrigerant after heat exchange from the refrigerant channel 351. Specifically, the heat dissipation device 300 further comprises a first pipe connection assembly 36 and a second pipe connection assembly 37 which are respectively connected to the refrigerant inlet 353 and the refrigerant outlet 354 by means of plug-in connection, so that the refrigerant channel 351 is in communication with the external system. The plug-in connection has the advantages of convenient installation and tight connection, and can select appropriate materials and specifications of the pipe connection assemblies according to different use environments and requirements to ensure the reliability and sealing of the system. When the heat dissipation device 300 needs to be maintained, repaired or replaced, the plug-in connection of the first pipe connection assembly 36 and the second pipe connection assembly 37 allows the first pipe connection assembly 36 and the second pipe connection assembly 37 to be easily detached from the refrigerant inlet 353 and the refrigerant outlet 354, without causing damage to the second heat sink 35 and other components, providing convenience for long-term use and maintenance of the heat dissipation device 300, reducing equipment downtime caused by maintenance, and improving the availability of the equipment.

[0090] In some embodiments, the second heat sink 35 is made of the same material as the first pipe connection assembly 36, and the second heat sink 35 is made of the same material as the second pipe connection assembly 37. During heat dissipation, the second heat sink 35 and the pipe connection assemblies will expand and contract due to temperature changes. The second heat sink 35, the first pipe connection assembly 36 and the second pipe connection assembly 37 are made of the same material and have the same thermal expansion coefficient. When the temperature changes, the second heat sink 35 and the pipe connection assemblies will expand or contract synchronously, avoiding the problems of loose connection or sealing failure caused by the difference in thermal expansion coefficient of different materials, helping to maintain the tightness of the connection and the reliability of the sealing, preventing refrigerant leakage, and ensuring the long-term stable operation of the heat dissipation device 300.

[0091] In some embodiments, the material of the second heat sink 35, the first pipe connection assembly 36 and the second pipe connection assembly 37 includes but is not limited to copper, aluminum, aluminum alloy and copper-containing alloy.

[0092] In some embodiments, as shown in FIG. 6, the heat dissipation device 300 further comprises a third pipe connection assembly 38 which is connected to the refrigerant channel 351 by means of plug-in connection, so that the refrigerant channel 351 is in communication with the external system. The plug-in connection has the advantages of convenient installation and tight connection, and can select appropriate materials and specifications of the pipe connection assemblies according to different use environments and requirements to ensure the reliability and sealing of the system. When the heat dissipation device 300 needs to be maintained, repaired or replaced, the plug-in connection of the third pipe connection assembly 38 allows the third pipe connection assembly 38 to be easily detached from the refrigerant channel 351, without causing damage to the second heat sink 35 and other components, providing convenience for long-term use and maintenance of the heat dissipation device 300, reducing equipment downtime caused by maintenance, and improving the availability of the equipment. Figure 3As shown, the refrigerant inlet 353 and the refrigerant outlet 354 are located on the same side of the second heat sink 35. The refrigerant inlet 353 and the refrigerant outlet 354 on the same side help arrange the refrigerant circulation pipeline more compactly, reducing the extra space occupied by the pipeline extending in different directions. In the limited space inside the air conditioner outdoor unit 1, this can make more efficient use of space, so that other components (such as the main board 32, electronic components, fans, etc.) have more space for reasonable layout, avoiding space waste or interference problems caused by unreasonable pipeline layout. Moreover, when maintaining, repairing or replacing components of the refrigerant circulation system, technicians can more conveniently operate the refrigerant inlet 353 and the refrigerant outlet 354 on the same side and the pipeline connected thereto.

[0093] In other embodiments, the refrigerant inlet 353 and the refrigerant outlet 354 are located on opposite sides of the second heat sink 35 (not shown in the figure). By arranging the refrigerant inlet 353 and the refrigerant outlet 354 on opposite sides, the space conditions of different sides can be flexibly adjusted according to the internal space layout of the air conditioner outdoor unit 1. For example, in the case where one side is relatively compact and the other side is relatively spacious, other components such as the refrigerant circulation pipeline 400, the support structure, etc. can be arranged according to the space conditions of different sides, so that the entire heat dissipation device 300 better adapts to the internal space structure of the air conditioner outdoor unit 1, achieving a more optimized space layout.

[0094] In other embodiments, the refrigerant inlet 353 and the refrigerant outlet 354 are located on adjacent sides of the second heat sink 35 (not shown in the figure). By arranging the refrigerant inlet 353 and the refrigerant outlet on adjacent sides, the layout of the refrigerant circulation pipeline can be more compact to some extent, compared with being located on opposite sides, which can reduce the extension length of the refrigerant circulation pipeline in space. For the air conditioner outdoor unit 1 which has limited space, this helps better utilize space, avoids excessive space occupied by the refrigerant circulation pipeline, and also makes the structure of the entire heat dissipation device 300 more compact. Moreover, the positions of the refrigerant inlet 353 and the refrigerant outlet can be reasonably arranged according to the positions of different components on adjacent sides, to avoid conflicts or interference with other components on the main board 32.

[0095] In some embodiments, the second heat sink 35 includes a first side 355 and a second side 356 arranged oppositely (see Figure 3 and Figure 4), the refrigerant passage 351 is in a flat structure, which can make the flow of the refrigerant in the passage more smooth and reduce the resistance in the flow process of the refrigerant. The refrigerant passage 351 penetrates the first side surface 355 and the second side surface 356, one of the first side surface 355 and the second side surface 356 is provided with the refrigerant inlet 353, and the other is provided with the refrigerant outlet 354. The two ends of the refrigerant passage 351 are communicated with the refrigerant inlet 353 and the refrigerant outlet 354 respectively, the refrigerant can directly flow into the refrigerant inlet 353 from one end, and flow out from the refrigerant outlet 354 at the other end after absorbing heat, forming a relatively simple and efficient heat exchange path, which is conducive to the efficient heat transfer from the first heat sink 34 to the refrigerant, and improves the heat exchange efficiency of the entire heat dissipation system.

[0096] It should be further pointed out that the flat structure of the refrigerant passage 351 is easier to realize than the complex curved or special-shaped structure of the passage in manufacturing. By using conventional machining processes (such as milling, drilling, etc.), the first side surface 355 and the second side surface 356 can be easily penetrated to form the refrigerant passage 351, which reduces the difficulty and cost of processing. The flat structure of the refrigerant passage 351 and the layout mode of the symmetrical refrigerant inlet 353 and the refrigerant outlet 354 can make the flow of the refrigerant more stable, reduce the turbulence and local pressure change caused by the shape and layout of the passage, help to improve the flow performance of the refrigerant, avoid the additional energy loss caused by unstable flow, and thus better realize the phase change and heat absorption of the refrigerant.

[0097] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, the refrigerant passage 351 is in a meandering structure, so that the path of the refrigerant flowing in the passage is lengthened. When the refrigerant flows in from the refrigerant inlet 353, passes through the meandering passage to the refrigerant outlet 354, the refrigerant stays in the second heat sink 35 for a longer time, so that the refrigerant can be fully heat-exchanged with the second heat exchanger, improving the refrigerant's ability to absorb heat, thereby more effectively taking away the heat transferred from the first heat sink 34. Moreover, the meandering passage increases the contact area of the refrigerant with the inner wall of the second heat sink 35, improving the heat exchange contact area, further promoting the heat transfer from the second heat sink 35 to the refrigerant, and thus improving the heat dissipation efficiency of the entire heat dissipation device 300. In some exemplary embodiments, the second heat sink 35 includes first and second side surfaces 355 and 356 arranged opposite to each other, one of the refrigerant inlet 353 and the refrigerant outlet 354 is arranged on the first side surface 355, and the other is arranged on the second side surface 356; in other exemplary embodiments, the refrigerant inlet 353 and the refrigerant outlet 354 are both arranged on one of the first and second side surfaces 355 and 356. It should be noted that the positions of the refrigerant inlet 353 and the refrigerant outlet 354 have certain flexibility, and can be adjusted according to the actual space of the air conditioner outdoor unit 1 and the layout of other components. Whether the refrigerant inlet 353 and the refrigerant outlet 354 are arranged on the first and second side surfaces 355 and 356 respectively or on one of the side surfaces, can be selected according to the actual situation, so that the heat dissipation device 300 can better adapt to different space conditions and design requirements.

[0098] In some embodiments, as shown in Figure 3 , Figure 4 , Figure 5 and Figure 7 , the refrigerant passage 351 includes a first branch passage 3511, a second branch passage 3512 and a main passage 3513, the first and second branch passages 3511 and 3512 are both arranged as straight and flat passages, and the first and second branch passages 3511 and 3512 are spaced apart and parallel to each other, the refrigerant inlet 353 and the refrigerant outlet 354 are both located on the first side surface 355, and the main passage 3513 is arranged at one end of the first and second branch passages 3511 and 3512 away from the first side surface 355, and is connected to the first and second branch passages 3511 and 3512, respectively.

[0099] The second side surface 356 is provided with a slot 35130, at least part of which forms the main channel 3513. The heat dissipation device 300 further comprises a blocking head 38 which is connected to the second heat sink 35 and blocks the slot 35130. In this way, the main purpose is to make it easier to manufacture by providing the first branch channel 3511, the second branch channel 3512 and the main channel 3513 in a flat structure. By using conventional processing techniques (such as milling, drilling, etc.), the first side surface 355 and the second side surface 356 can be easily formed through the first branch channel 3511, the second branch channel 3512 and the main channel 3513, thereby reducing the difficulty and cost of processing.

[0100] In this embodiment, as shown in Figure 4 and Figure 5 , the blocking head 38 is provided in a shape that matches the shape of the opening 35134 of the main channel 3513 at the second side surface 356 to ensure a tight fit. For example, if the opening 35134 of the slot 35130 is circular, the blocking head 38 will typically be a cylinder of a corresponding size; if the opening 35134 is square, the blocking head 38 will also be square in shape. This ensures maximum contact between the blocking head 38 and the opening 35134, reducing the gap and preventing refrigerant leakage. In some exemplary embodiments, to improve the sealing of the opening 35134 by the blocking head 38, an internal thread is provided at the opening 35134, and the blocking head 38 is provided with an external thread. By rotating the blocking head 38, the blocking head 38 is screwed into the opening 35134, and a sealing material such as a gasket or sealant is added at the thread. The gasket can be placed at the bottom of the blocking head 38 or the edge of the opening 35134. When the blocking head 38 is screwed in, the gasket will be compressed, filling the small gap between the threads and further preventing refrigerant leakage. In other exemplary embodiments, the blocking head 38 is blocked in an interference fit. The size of the blocking head 38 is slightly larger than the size of the opening 35134 of the main channel 3513. The blocking head 38 is pressed into the opening 35134, and the elastic deformation of the blocking head 38 allows the blocking head 38 to be tightly clamped in the opening 35134, forming a seal.

[0101] In some embodiments, as shown in Figure 4 , Figure 5 and Figure 7As shown, the main passage 3513 includes a first section 35131 and a second section 35132 in communication, the inner diameter of the first section 35131 is smaller than that of the second section 35132, that is, the main passage 3513 is arranged in a stepped structure, the end of the second section 35132 away from the first section 35131 forms an opening 35134 on the second side surface 356, the two ends of the first section 35131 are in communication with the first branch passage 3511 and the second branch passage 3512, respectively, and a stepped surface 35133 is formed between the first section 35131 and the second section 35132, and the plug 38 is inserted into the second section 35132 and is in sealing connection with the stepped surface 35133. It should be noted that in the present embodiment, the first section 35131 is used for the flow of refrigerant and serves as a connecting passage of the first branch passage 3511 and the second branch passage 3512, and the refrigerant does not enter the second section 35132. The second section 35132 serves to provide a mounting space for the plug 38, and the inner wall surface of the second section 35132 abuts against the circumferential outer surface of the plug 38, so as to form a sealing structure between the stepped surface 35133 and the plug 38 and between the inner wall surface of the second section 35132 and the circumferential outer surface of the plug 38, respectively, thereby improving the sealing performance between the plug 38 and the opening 35134 and reducing the probability of refrigerant leakage from the opening 35134.

[0102] In some embodiments, as shown in Figure 3 and Figure 7 The extension direction of the refrigerant passage 351 is defined as the extension direction of the refrigerant passage, the radial dimension of the refrigerant passage 351 in the first direction is greater than the radial dimension of the refrigerant passage 351 in the second direction, the first direction and the second direction are perpendicular to the extension direction of the refrigerant passage, and the first direction is perpendicular to the second direction. In this way, the cross section of the refrigerant passage 351 is an oval or oval-like shape, with the long axis along the first direction and the short axis along the second direction; or the cross section of the refrigerant passage 351 is a rectangular-like shape, with the longer side along the first direction and the shorter side along the second direction. In this way, the contact area with the refrigerant can be increased. When the refrigerant flows in the passage, more refrigerant will contact the passage wall due to the larger radial dimension of the passage in the first direction. Compared with conventional circular or square passages, there is more heat exchange area under the same passage length, thereby improving the refrigerant's ability to absorb heat and enhancing the heat exchange efficiency, which is conducive to more effectively removing the heat transferred by the first heat sink 34.

[0103] In some embodiments, as shown in Figure 3 and Figure 7As shown, the cross-sectional shape of the refrigerant passage 351 is substantially rectangular structure, and the first direction is parallel to the heat conduction side 342, and the second direction is from the mounting side 341 to the heat conduction side 342. Since the first direction is parallel to the heat conduction side 342, when heat is conducted from the heat conduction side 342 of the first heat sink 34 to the second heat sink 35, the rectangular structure of the refrigerant passage 351 has a larger size in the first direction, which provides a larger area for heat conduction. Heat can be transferred more smoothly in the direction parallel to the heat conduction side 342, because the larger passage area can better receive heat from the heat conduction side 342, thereby facilitating the transfer of heat from the first heat sink 34 to the refrigerant in the refrigerant passage 351, improving the efficiency of heat conduction. Moreover, the cross-sectional shape of the refrigerant passage 351 is substantially rectangular structure, which is easier to manufacture using conventional processing technology than some complex special-shaped structure. For example, using milling, cutting and other processing methods, a rectangular passage can be relatively easily manufactured, reducing the difficulty and cost of manufacturing. And in the process of processing, because the shape is regular, it is easier to ensure the processing precision, improve the product quality, and reduce the performance degradation caused by processing errors.

[0104] In other embodiments, the cross-sectional shape of the refrigerant passage 351 can also be circular or square.

[0105] Further, as shown in Figure 2 and Figure 3 , the radial dimension of the refrigerant inlet 353 along the first direction is greater than the radial dimension of the refrigerant inlet 353 along the second direction, and the shape profile of the refrigerant inlet 353 matches the shape profile of the first branch 3511. The first connector assembly 36 includes a first inner connector 361, one end of the first inner connector 361 has a profile that matches the profile of the refrigerant inlet 353 and is in sealed connection with the refrigerant inlet 353, and the profile of one end of the first inner connector 361 matches the refrigerant inlet 353 to achieve a tight and seamless connection. Because of the special shape of the refrigerant inlet 353, by designing one end of the first inner connector 361 to have the same profile, the fit between the two can be ensured, reducing the gap caused by the mismatch of the shape, thereby ensuring the sealing effect and preventing refrigerant leakage.

[0106] The other end of the first inner connector 361 is configured as a circular pipe structure and is connected to the refrigerant conveying pipe 401 of the refrigerant circulation system. The circular pipe structure is a common pipe connection structure, which has the advantages of easy connection with other pipe components and good fluid transmission performance. In the refrigerant circulation system of the air conditioner outdoor unit 1, the refrigerant conveying pipe 401 is usually a circular pipe, and the use of the circular pipe structure can conveniently use standard pipe connection fittings for connection, improving the compatibility and assembly convenience of the system.

[0107] The material of the first inner pipe 361 is the same as that of the second heat sink 35.

[0108] Further, as shown in Figure 1 , Figure 2 , the first pipe assembly 36 further comprises a first sealing sleeve 362, which is sleeved on the first inner pipe 361 and the refrigerant conveying pipe 401 of the refrigerant circulation pipeline. The main function of the first sealing sleeve 362 is to further strengthen the sealing of the connecting part of the first inner pipe 361 and the refrigerant conveying pipe 401. At the connecting part of the first inner pipe 361 and the refrigerant conveying pipe 401, the first sealing sleeve 362 is used to fill the small gap between the first inner pipe 361 and the refrigerant conveying pipe 401, form an additional sealing layer, prevent the refrigerant from leaking out of the connecting part, ensure the sealing of the refrigerant circulation system, and ensure that the refrigerant can circulate normally in the system without affecting the heat dissipation effect of the heat dissipation device 300 due to leakage.

[0109] The material of the first sealing sleeve 362 can be a rubber tube. Rubber has excellent elasticity and plasticity, and can tightly fit the outer surfaces of the first inner pipe 361 and the refrigerant conveying pipe 401, thereby effectively filling the gap between them.

[0110] As shown in Figure 8 , the first inner pipe 361 comprises a first plug-in section 3611, a first transition section 3612, a first main body section 3613, and a first connecting section 3614 connected in sequence. The profile of the first plug-in section 3611 matches the refrigerant inlet 353 and is sealingly connected thereto. The first connecting section 3614 is plug-in connected with the refrigerant conveying pipe 401. The outer diameter of the first main body section 3613 is smaller than that of the first connecting section 3614, and the outer diameter of the first main body section 3613 is smaller than that of the first plug-in section 3611. From the first main body section 3613 to the first plug-in section 3611, the diameter of the first transition section 3612 gradually increases. The first sealing sleeve 362 is sleeved on the first main body section 3613 and the first connecting section 3614, and the profile of the first sealing sleeve 362 matches the first main body section 3613 and the first connecting section 3614. In this way, the first sealing sleeve 362 can also play the role of reinforcing the connection and limiting the position. On the one hand, the first sealing sleeve 362 wraps the first inner pipe 361 and the refrigerant conveying pipe 401 together, to some extent, limits their relative displacement, and makes the connection of the two more firm. On the other hand, the first sealing sleeve can limit the axial movement of the first sealing sleeve relative to the first inner pipe 361.

[0111] During the operation of the air conditioner outdoor unit 1, it will be affected by various external forces, such as the vibration of the machine itself, wind force, etc. These external forces may cause the connection between the first inner connecting pipe 361 and the refrigerant conveying pipe 401 to loosen or produce relative displacement, affecting the stability and sealing of the connection. The presence of the first sealing sleeve 362 can increase the mechanical strength of the connection structure, improve the reliability of the connection, prevent refrigerant leakage and system failure caused by loose connection, and ensure that the heat dissipation device 300 can operate stably in complex operating environment.

[0112] In some embodiments, as shown in Figure 2 and Figure 3 , the radial dimension of the refrigerant outlet 354 along the first direction is greater than the radial dimension of the refrigerant outlet 354 along the second direction, and the shape profile of the refrigerant outlet 354 matches the shape profile of the second branch 3512. The second connecting pipe assembly 37 includes a second inner connecting pipe 371, one end of which matches the profile of the refrigerant outlet 354 and is in sealed connection with the refrigerant outlet 354. The profile of one end of the second inner connecting pipe 371 matches the refrigerant outlet 354 to achieve a tight and seamless connection. Due to the special shape of the refrigerant outlet 354, by designing the one end of the second inner connecting pipe 371 to have the same profile, the fit between the two can be ensured, reducing the gap caused by mismatched shapes, thereby ensuring the sealing effect and preventing refrigerant leakage.

[0113] The other end of the second inner connecting pipe 371 is configured as a circular pipe structure and is connected in communication with the refrigerant return pipe 402 of the refrigerant circulation pipeline. The circular pipe structure is a common pipe connection structure, which has the advantages of easy connection with other pipe components, good fluid transmission performance, etc. In the refrigerant circulation system of the air conditioner outdoor unit 1, the refrigerant conveying pipe 401 is usually a circular pipe, and the use of the circular pipe structure can conveniently use standard pipe connection fittings for connection, improving the compatibility and assembly convenience of the system.

[0114] Among them, the material of the second inner connecting pipe 371 is the same as that of the second heat sink 35.

[0115] Further, please refer to Figure 1 , Figure 2As shown, the second connection assembly 37 further comprises a second sealing sleeve 372 sleeved outside the second inner connection pipe 371 and the refrigerant return pipe 402 of the refrigerant circulation pipeline, and the main function of the second sealing sleeve 372 is to further strengthen the sealing of the connection part of the second inner connection pipe 371 and the refrigerant return pipe 402. At the connection part of the second inner connection pipe 371 and the refrigerant return pipe 402, the second sealing sleeve 372 is used to fill the small gap between the second inner connection pipe 371 and the refrigerant return pipe 402, form an additional sealing layer, prevent the refrigerant from leaking out of the connection, ensure the sealing of the refrigerant circulation system, and ensure that the refrigerant can normally circulate in the system without affecting the heat dissipation effect of the heat dissipation device 300 due to leakage.

[0116] As shown in the drawings, Figure 9 As shown, the second inner connection pipe 371 comprises a second plug-in section 3711, a second transition section 3712, a second main body section 3713 and a second connection section 3714 connected in sequence, the profile of the second plug-in section 3711 matches the refrigerant inlet 353 and is sealingly connected with the refrigerant inlet 353, the second connection section 3714 is plug-in connected with the refrigerant return pipe 402, wherein the outer diameter of the second main body section 3713 is smaller than the outer diameter of the second connection section 3714, and the outer diameter of the second main body section 3713 is smaller than the outer diameter of the second plug-in section 3711, the diameter of the second transition section 3712 gradually increases from the second main body section 3713 to the second plug-in section 3711, the second sealing sleeve 372 is sleeved outside the second main body section 3713 and the second connection section 3714, and the profile of the second sealing sleeve 372 matches the second main body section 3713 and the second connection section 3714. In this way, the second sealing sleeve 372 can also play the role of reinforcing the connection and limiting the position. On the one hand, the second sealing sleeve 372 wraps the second inner connection pipe 371 and the refrigerant delivery pipe 401 together, to some extent, limits their relative displacement, and makes the connection of the two more firm; on the other hand, the second sealing sleeve can limit the axial movement of the second sealing sleeve relative to the second inner connection pipe 371.

[0117] During the operation of the air conditioner outdoor unit 1, it will be affected by various external forces, such as the vibration of the machine itself, wind force, etc. These external forces may cause the connection between the second inner connection pipe 371 and the refrigerant return pipe 402 to loosen or produce relative displacement, affecting the stability and sealing of the connection. The presence of the second sealing sleeve 372 can increase the mechanical strength of the connection structure and improve the reliability of the connection, prevent refrigerant leakage and system failure caused by loose connection, and ensure that the heat dissipation device 300 can operate stably under complex operating environment.

[0118] In some embodiments, as shown in the drawings, Figure 6 and Figure 7As shown, the first branch 3511 is provided with a plurality of partition portions 3514 which are spaced apart on the inner wall of the first branch 3511. By providing the partition portions 3514, the first branch 3511 is divided into a plurality of independent micro-channels 35101, each of which is in communication with the main channel 3513, thereby increasing the contact area of the refrigerant with the second heat exchanger 35, allowing more refrigerant to exchange heat with the wall of the first branch 3511, promoting the transfer of heat from the second heat sink 35 to the refrigerant, and helping to improve the overall heat dissipation effect.

[0119] In detail, the partition portions 3514 are provided in a rib structure, which is long and can be rectangular, trapezoidal, triangular or circular arc rib, etc. The rib structure extends along the length direction of the first branch, which can guide the flow direction of the refrigerant to some extent.

[0120] Further, the second branch 3512 is provided with a plurality of partition portions 3514 which are spaced apart on the inner wall of the second branch 3512. By providing the partition portions 3514, the second branch 3512 is divided into a plurality of independent micro-channels 35101, each of which is in communication with the main channel 3513, thereby further increasing the contact area of the refrigerant with the second heat exchanger, allowing more refrigerant to exchange heat with the wall of the second branch 3512, promoting the transfer of heat from the second heat sink 35 to the refrigerant, and helping to improve the overall heat dissipation effect.

[0121] In detail, the partition portions 3514 are provided in a rib structure, which is long and can be rectangular, trapezoidal, triangular or circular arc rib, etc. The rib structure extends along the length direction of the second branch 3512, which can guide the flow direction of the refrigerant to some extent.

[0122] It should be noted that the partition portions 3514 can provide certain structural support for the refrigerant channel 351. When subjected to internal refrigerant pressure and external forces, these partition portions 3514 can enhance the strength of the refrigerant channel 351, preventing deformation or damage of the channel. In particular, when the second heat sink 35 is subjected to external vibration, pressure or other mechanical stress, the long partition portions 3514 can enhance the deformation resistance of the channel, ensuring long-term stable operation of the heat dissipation device 300.

[0123] In some embodiments, as shown in Figs. 1A and 1B, the refrigerant channel 351 is provided with a plurality of partition portions 3514 which are spaced apart on the inner wall of the refrigerant channel 351. By providing the partition portions 3514, the refrigerant channel 351 is divided into a plurality of independent micro-channels 35101, each of which is in communication with the main channel 3513, thereby increasing the contact area of the refrigerant with the second heat exchanger 35, allowing more refrigerant to exchange heat with the wall of the first branch 3511, promoting the transfer of heat from the second heat sink 35 to the refrigerant, and helping to improve the overall heat dissipation effect. Figure 6 and Figure 7 As shown in Figs. 1A and 1B, a plurality of groove structures 3515 are further provided on the inner wall of the refrigerant channel 351, which are spaced apart on the inner wall of the refrigerant channel 351. By providing the groove structure 3515, the effective heat exchange area of the inner wall of the refrigerant channel 351 is further increased, and the heat exchange efficiency is improved.

[0124] The groove structure includes, but is not limited to, a rectangular groove, a semicircular groove, a trapezoidal groove, etc.

[0125] In some embodiments, as shown in Figure 6 and Figure 7 The groove structure 3515 is in a long strip shape, and the extension direction of the groove structure 3515 is parallel to the extension direction of the refrigerant channel 351. Since the groove structure 3515 is in a long strip shape and parallel to the extension direction of the refrigerant channel 351, when the refrigerant flows in the channel, it will flow along the groove, ensuring that the refrigerant is in full contact with the channel wall, improving the effect of heat transfer from the second heat sink 35 to the refrigerant, and thus improving the heat dissipation performance of the entire heat dissipation device 300. Moreover, the long strip-shaped groove parallel to the extension direction of the refrigerant channel 351 can enhance the structural stability of the refrigerant channel 351 to some extent, share part of the pressure, improve the ability of the channel to withstand internal refrigerant pressure and external force, prevent the channel from deforming or being damaged, and ensure the long-term stable operation of the heat dissipation device 300. In this embodiment, a plurality of groove structures 3515 are arranged in sequence along the axial direction of the refrigerant channel 351, and the inner wall of the refrigerant channel 351 is in a wave-shaped structure as a whole, greatly increasing the surface area of the inner wall of the refrigerant channel 351, ensuring that the refrigerant is in full contact with the channel wall, and improving the effect of heat transfer from the second heat sink 35 to the refrigerant.

[0126] Further, as shown in Figure 6 and Figure 7 Each partition 3514 extends from one end of the refrigerant channel 351 to the other end of the refrigerant channel 351, and each groove structure 3515 extends from one end of the refrigerant channel 351 to the other end of the refrigerant channel 351. In this way, the partition 3514 and the groove structure 3515 will continuously affect the flow and heat exchange process of the refrigerant in the entire refrigerant channel 351. During the flow through the channel, the refrigerant will always be in contact with the partition 3514 and the groove structure 3515, so that the heat exchange between the refrigerant and the second heat sink 35 is more sufficient and continuous, increasing the effective heat exchange path and heat exchange contact area, thereby improving the heat exchange efficiency, ensuring that heat is more efficiently transferred from the second heat sink 35 to the refrigerant, and improving the heat dissipation performance of the entire heat dissipation device 300.

[0127] The partition 3514 and the groove structure 3515 extending from one end of the refrigerant channel 351 to the other end of the refrigerant channel 351 can better guide the flow of the refrigerant, provide a relatively stable flow path for the refrigerant, avoid local turbulence or flow disorder of the refrigerant in the channel, and make the refrigerant flow in a more orderly manner, so that the flow and heat exchange process of the refrigerant in the channel are more uniform. The refrigerant can more uniformly absorb heat from each part of the second heat sink 35, avoiding local overheating or local insufficient heat dissipation, thereby improving the heat dissipation uniformity of the heat dissipation device 300 and ensuring that the overall heat dissipation effect of the second heat sink 35 is more uniform and consistent.

[0128] In some other embodiments, the second heat sink 35 is provided with a receiving hole (not shown in the figure), and a heat conduction pipe (not shown in the figure) is arranged in the receiving hole. The heat conduction pipe has at least one micro-channel for the flow of refrigerant in the interior of the heat conduction pipe. The heat conduction pipe is fixed in the receiving hole and is welded to the second heat exchanger. The two ends of the heat conduction pipe are respectively communicated with the first pipe assembly and the second pipe assembly. In detail, the heat conduction pipe is made of a metal material with high heat conduction performance, such as copper or aluminum. The heat conduction pipe has at least one micro-channel for the flow of refrigerant in the interior of the heat conduction pipe. The shape of the micro-channel can be circular, rectangular, triangular, or the like. In order to further enhance the heat dissipation performance of the micro-channel, the inner wall surface of the micro-channel can be provided with a small protrusion, groove, or rib structure to increase the contact area between the refrigerant and the inner wall of the heat conduction pipe and to strengthen the heat transfer effect. The outer contour of the heat conduction pipe matches the inner wall contour of the receiving hole. The heat conduction pipe is slowly inserted into the receiving hole to ensure the positional accuracy between the heat conduction pipe and the receiving hole. Then, a welding process, such as high-frequency welding or laser welding, is used to firmly weld the heat conduction pipe and the second heat sink together to form an integrated heat dissipation structure. This not only ensures the connection strength between the heat conduction pipe and the second heat sink, but also effectively reduces the contact thermal resistance, so that heat can be quickly transferred from the second heat sink to the heat conduction pipe.

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[0130] Further, as shown in Figure 10 , Figure 11 and Figure 12 , the electric control device 30 further comprises a main board 32 and a support fence 80, the support fence 80 provides a stable mounting base for the first heat sink 34, the support fence 80 is mounted on the main board 32, and one end of the support fence 80 away from the main board 32 is provided with a mounting area 801 and a support part 802, the power device is mounted on the mounting area 801, and the pins of the power device are electrically connected with the main board 32, the first heat sink 34 is mounted on the support part 802, and the power device is clamped between the support fence 80 and the first heat sink 34. Through the connection with the main board 32 and the first heat sink 34, the support fence 80 bears the weight of the first heat sink 34, guarantees the structural stability of the first heat sink 34 in the whole heat dissipation device 300, and helps to keep the relative position of the first heat sink 34 and the power device stable during the heat dissipation process, so as to ensure the good heat conduction connection with the power device and realize effective heat dissipation.

[0131] It should be further pointed out that the support fence 80 also plays a heat insulation role, effectively preventing the heat from being transmitted from the power device and the first heat sink 34 to the main board 32. In the working process of the heat dissipation device 300, the power device will generate a large amount of heat, and the first heat sink 34 is responsible for taking away the heat. However, without the heat insulation function of the support fence 80, the heat may be transmitted to the main board 32 through conduction, convection or radiation, etc., causing damage to other electronic elements on the main board 32.

[0132] The support fence 80 is located between the power device and the main board 32, and forms a heat insulation barrier between the power device and the main board 32. The support fence 80 can be made of a low-thermal-conductivity material, which can effectively block the heat transmission path, thereby protecting the sensitive electronic elements on the main board 32 from high temperature, prolonging the service life of the main board 32 and the electronic elements thereon, and improving the reliability and stability of the whole electric control device 30.

[0133] Further, the support fence 80 comprises a support body 81 and a fence structure 82 provided at the edge of the support body 81, and a glue pouring area is defined between the fence structure 82 and the support body 81, a plurality of electronic elements are provided on the main board 32 in the glue pouring area, the glue pouring area is arranged opposite to the avoiding groove 344 in the direction perpendicular to the main board 32, and the avoiding groove 344 provides an avoiding space for the glue pouring operation of the glue pouring area during the glue pouring process, so as to facilitate the glue pouring operation.

[0134] According to the embodiments of the present application, please combine Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17and Figure 18 As shown in the drawings, an outdoor unit 1 is also proposed, which comprises an electric control device 30. The outdoor unit further comprises a cabinet, a partition assembly and a fan. In detail, the cabinet 10 comprises a bottom plate 111, a top cover 14, a front panel 12, a left side plate 131 and a right side plate 132, which together enclose a containing cavity 101, the partition assembly 160 is arranged in the containing cavity 101, the partition assembly 160 is connected with the front panel 12 and the bottom plate 111 respectively, and the partition assembly 160 is arranged between the left side plate 131 and the right side plate 132 and separates the containing cavity 101 into a first cavity 1011 and a second cavity 1012. The first cavity 1011 is used for containing a heat exchanger 61 and a fan 680, the electric control device 30 is installed on the partition assembly 160 and located in the second cavity 1012, and the electric control device 30 comprises a plurality of power devices and a heat dissipation device in heat-conducting connection with at least one power device, the heat dissipation device takes away the heat of the power device through the circulating flow of refrigerant to achieve high-efficiency heat dissipation.

[0135] The cabinet 10 is provided with an air-cooled air inlet (not shown in the drawings), and the partition assembly 160 is provided with an air-cooled air outlet 1610, the air-cooled air inlet communicates the second cavity 1012 with the outside, and the air-cooled air outlet 1610 communicates the first cavity 1011 and the second cavity 1012. Among them, Figure 14 and Figure 16 The continuous indication arrows in the drawings indicate the direction of air flow.

[0136] When the fan 680 in the first cavity 1011 operates, the air in the first cavity 1011 is driven by the fan 680 to flow to the outside, so that the first cavity 1011 forms a negative pressure area, the air in the second cavity 1012 is sucked into the first cavity 1011 through the air-cooled air outlet 1610 to provide power for the air flow in the second cavity 1012, and then the air in the outside first enters the second cavity 1012 through the air-cooled air inlet, and then flows to the first cavity 1011 through the air-cooled air outlet 1610. The electric control device 30 is located between the air-cooled air inlet and the air-cooled air outlet 1610, the air in the second cavity 1012 exchanges heat with the power device in the electric control device 30 during the flow process, and takes away the heat of the power device, so as to use the natural wind to dissipate heat for the power device. In addition, at least one power device in the electric control device 30 also dissipates heat through the heat dissipation device, so that the electric control heat dissipation structure has two heat dissipation modes of refrigerant heat dissipation and air-cooled heat dissipation, and the heat dissipation mode can be selected according to the heat generation and heat dissipation demand of different power devices. For the key power device with large heat generation, high-efficiency heat dissipation is realized by using the heat dissipation device; and for other power devices, air-cooled heat dissipation can meet the requirements, so as to better guarantee the stable operation of the entire electric control device 30 and prolong the service life of the electronic components.

[0137] It should be noted that the application does not need to additionally set a small fan on the side of the electric control device 30, and air flow is driven by negative pressure in the first cavity 1011, which simplifies the heat dissipation structure. Not only reduces the number of parts of the equipment, reduces the production and maintenance cost, but also reduces the risk of heat dissipation failure caused by fan failure, improves the reliability and stability of the whole heat dissipation system.

[0138] As shown in Figure 15 and Figure 16 , the electric control device 30 further comprises an electric control support 31 and a mainboard 32, and the mainboard 32 is a core component in the electric control device 30, which is a printed circuit board (PCB), and a plurality of power devices are integrated on the mainboard 32, and the electrical connection and signal transmission of the power devices are realized through the circuit arranged inside the mainboard 32, which ensures the stable operation of the whole electric control device 30. The electric control support 31 is installed on the partition plate 16, and the electric control support 31 is arranged in the second cavity 1012 and divides the second cavity 1012 into a wind cooling cavity 10121 and an air outlet cavity 10122, and the mainboard 32 is installed on the electric control support 31, and the mainboard 32 and the power devices are located in the wind cooling cavity 10121 together. The electric control support 31 is provided with a transition air port 315, and the transition air port 315 communicates the wind cooling cavity 10121 and the air outlet cavity 10122, and the transition air port 315 is the only passage for air flowing from the wind cooling cavity 10121 to the air outlet cavity 10122 in the whole heat dissipation air circulation.

[0139] In this embodiment, please refer to Figure 13 , Figure 14 and Figure 16 , when the fan 680 in the first cavity 1011 operates, a negative pressure area is formed in the first cavity 1011. Since the wind cooling air outlet 1610 is communicated with the wind cooling cavity 10121 through the air outlet cavity 10122 and the transition air port 315 in turn, and the wind cooling air inlet is communicated with the wind cooling cavity 10121, the external air first enters the wind cooling cavity 10121 through the wind cooling air inlet. In the wind cooling cavity 10121, the air exchanges heat with the power devices located on the mainboard 32, and carries away the heat generated by the power devices. Then, the heated air enters the air outlet cavity 10122 through the transition air port 315, and is then sucked into the first cavity 1011 through the wind cooling air outlet 1610, and finally is discharged to the outside.

[0140] By subdividing the second cavity 1012 into the air cooling cavity 10121 and the air outlet cavity 10122, and guiding the airflow by the transition air outlets 315 on the electric control support 31, the air can be more fully exchanged with the power devices in the air cooling cavity 10121, the path of the heat dissipation airflow is optimized, the heat dissipation efficiency is improved, and it is ensured that the power devices can work in a more suitable temperature environment. By using reasonable cavity division and airflow guidance, the air cooling heat dissipation process is more stable and reliable, so as to ensure that the cold air flows through the power devices stably, reduce the performance fluctuation of the power devices caused by unstable heat dissipation, and improve the stability and reliability of the entire electric control device 30.

[0141] The electric control support 31 is provided with a plurality of transition air outlets 315, and the plurality of transition air outlets 315 are sequentially arranged around the circumferential edge of the main board 32. The plurality of transition air outlets 315 are sequentially arranged around the circumferential edge of the main board 32, so that the hot air can be discharged from each direction around the main board 32. In the heat dissipation process, the heat generated by the power devices at different positions on the main board 32 can be uniformly guided to the transition air outlets 315. For example, the heat of the edge part and the center part of the main board 32 can have a suitable discharge path, avoiding the local overheating. Compared with only one or a few transition air outlets 315, the uniformly distributed transition air outlets 315 can make the hot air more evenly leave the heat dissipation area, ensure that the temperature distribution of the entire surface of the main board 32 is more uniform, and thus improve the uniformity of heat dissipation.

[0142] Among them, the main board 32 is in a rectangular plate structure, and the plurality of transition air outlets 315 can be arranged on one side of the main board 32, or can be arranged on different sides of the main board 32. For example, in some exemplary embodiments, the plurality of transition air outlets 315 are arranged on the side of the main board 32 facing the top cover 14. In other exemplary embodiments, part of the plurality of transition air outlets 315 are arranged on the side of the main board 32 facing the top cover 14, and the other part are arranged on the side of the main board 32 facing the front panel 12.

[0143] According to the embodiment of the present application, an air conditioner is also provided, which comprises a refrigerant circulation pipeline and an outdoor unit, and the refrigerant circulation pipeline is in communication with the refrigerant channel.

[0144] The air conditioner comprises an outdoor unit 1, an indoor unit and a refrigerant circulation pipeline, the indoor unit and the outdoor unit are connected through the refrigerant circulation pipeline, and the indoor unit and the outdoor unit are also connected through an electrical line. The electrical line comprises a control signal line and a power line, wherein the control signal line is used for sending instructions, such as operation instructions of starting, stopping, adjusting a refrigeration or heating mode, adjusting a rotating speed of a fan 680 and the like, from a control unit of the indoor unit to the outdoor unit. The power line provides power support for devices such as a compressor and the fan 680 of the outdoor unit, and ensures normal operation of the devices. The air conditioner provided by the present application comprises the air conditioner outdoor unit 1, and therefore has the same technical effects as the outdoor unit, which will not be described herein.

[0145] The above description is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A heat dissipating device, characterized by, The heat dissipation device comprises: a first heat sink for heat conduction connection with the power device; a second heat sink detachably connected in heat conduction with the first heat sink, the second heat sink being internally provided with a refrigerant channel for refrigerant flow, the refrigerant channel comprising at least one microchannel.

2. The heat dissipation device according to claim 1, wherein the second heat sink is provided with a plurality of microchannels; alternatively, the second heat sink is provided with a receiving hole, a heat conduction pipe being arranged in the receiving hole, the heat conduction pipe being internally provided with at least one microchannel for refrigerant flow.

3. The heat dissipating device of claim 1, wherein the first heat sink is provided with an installation side and a heat conduction side arranged oppositely, the heat conduction side being used for heat conduction connection with the power device, and the second heat sink being detachably installed on the installation side.

4. The heat dissipating device according to claim 3, wherein the first heat sink is provided with a plurality of first fixing holes penetrating through the installation side and the heat conduction side, the second heat sink is provided with a plurality of second fixing holes corresponding to the first fixing holes one by one, and the first fixing holes and the second fixing holes are used for passing through a connecting member to connect the first heat sink and the second heat sink.

5. The heat dissipating device of claim 4, wherein At least one of the second fixing holes is formed with an opening at the edge of the second heat sink in a direction perpendicular to the penetrating direction of the second fixing holes.

6. The heat dissipating device according to any one of claims 2 to 5, wherein the heat conduction side comprises a heat conduction surface and an avoiding groove, the avoiding groove being arranged at least at one side of the heat conduction surface in a direction parallel to the heat conduction surface, and the heat conduction surface being used for heat conduction connection with the power device.

7. The heat dissipating device according to any one of claims 2 to 5, wherein the first heat sink is further provided with a plurality of connecting holes penetrating through the installation side and the heat conduction side.

8. The heat dissipating device of claim 3, wherein the second heat sink is further provided with a refrigerant inlet and a refrigerant outlet communicating with the refrigerant channel; the heat dissipation device further comprises a first connecting pipe assembly and a second connecting pipe assembly, the first connecting pipe assembly being inserted into the refrigerant inlet and communicating with the refrigerant channel, and the second connecting pipe assembly being inserted into the refrigerant outlet and communicating with the refrigerant channel.

9. The heat dissipating device of claim 8, wherein, the second heat sink and the first connecting pipe assembly are made of the same material; and / or the second heat sink and the second connecting pipe assembly are made of the same material.

10. The heat dissipating device of claim 8, wherein, the refrigerant inlet and the refrigerant outlet are located on the same side of the second heat sink; alternatively, the refrigerant inlet and the refrigerant outlet are respectively located on opposite sides of the second heat sink; or the refrigerant inlet and the refrigerant outlet are respectively located on adjacent sides of the second heat sink.

11. The heat dissipating device of claim 8, wherein, the second heat sink comprises a first side and a second side arranged oppositely; the refrigerant channel has a straight structure and penetrates through the first side and the second side, one of the first side and the second side being provided with the refrigerant inlet and the other being provided with the refrigerant outlet, and both ends of the refrigerant channel communicating with the refrigerant inlet and the refrigerant outlet respectively.

12. The heat dissipating device of claim 8, wherein, the refrigerant channel has a winding structure; The second heat sink comprises first and second opposite sides, one of the coolant inlet and the coolant outlet is arranged on the first side, and the other is arranged on the second side, or both the coolant inlet and the coolant outlet are arranged on one of the first and second sides, and the two ends of the coolant channel are communicated with the coolant inlet and the coolant outlet respectively.

13. The heat dissipating device of claim 12, wherein, The coolant channel comprises first and second branches and a main path, the coolant inlet and the coolant outlet are both arranged on the first side, the two ends of the first branch are communicated with the coolant inlet and one end of the main path respectively, and the two ends of the second branch are communicated with the coolant outlet and the other end of the main path respectively. The second side is provided with a slot, at least part of the slot forms the main path, and the heat dissipation device further comprises a plugging head connected with the second heat sink and plugging the slot.

14. The heat dissipating device of claim 13, wherein, The slot comprises first and second segments communicated with each other, the first segment is communicated with the first and second branches respectively, the inner diameter of the first segment is smaller than that of the second segment, and a stepped surface is formed between the first and second segments, and the plugging head is inserted into the second segment and sealingly connected with the stepped surface.

15. The heat dissipation device according to claim 13, wherein The first branch is provided with a plurality of partition portions extending along the length direction of the first branch and separating the first branch into a plurality of independent microchannels, and each microchannel is communicated with the main path; And / or, the second branch is provided with a plurality of partition portions extending along the length direction of the second branch and separating the second branch into a plurality of independent microchannels, and each microchannel is communicated with the main path.

16. The heat dissipating device of claim 8, wherein, The radial dimension of the coolant channel along a first direction is greater than the radial dimension of the coolant channel along a second direction, the first and second directions are perpendicular to the extension direction of the coolant channel respectively, and the first direction is perpendicular to the second direction.

17. The heat dissipating device of claim 16, wherein, The first direction is parallel to the heat conduction side, and the second direction is from the mounting side to the heat conduction side.

18. The heat dissipating device of claim 16, wherein, The radial dimension of the coolant inlet along the first direction is greater than the radial dimension of the coolant inlet along the second direction, the first connector assembly comprises a first inner connector, one end of the first inner connector is matched with the contour of the coolant inlet and sealingly connected with the coolant inlet, and the other end of the first inner connector is configured as a circular tube structure.

19. The heat dissipating device of claim 18, wherein, The first connector assembly further comprises a first sealing sleeve, one end of the first sealing sleeve is sleeved outside the first inner connector, and the other end of the first sealing sleeve is used for sleeving outside the coolant delivery pipe of the refrigerant circulation pipeline.

20. The heat dissipating device of claim 18, wherein, The radial dimension of the refrigerant outlet along the first direction is greater than the radial dimension of the refrigerant outlet along the second direction, the second connector assembly comprises a second inner connector, one end of the second inner connector is matched with the contour of the refrigerant outlet and is in sealing connection with the refrigerant outlet, and the other end of the second inner connector is configured as a circular tube structure.

21. The heat dissipating device of claim 20, wherein, The second connector assembly further comprises a second sealing sleeve, one end of the second sealing sleeve is sleeved on the second inner connector, and the other end of the second sealing sleeve is used for sleeving on the refrigerant conveying pipe of the refrigerant circulation pipeline.

22. The heat dissipating device according to any one of claims 1 or 8 to 21, wherein, The inner wall of the refrigerant channel is provided with a plurality of groove structures which are spaced apart on the inner wall of the refrigerant channel.

23. The heat dissipating device of claim 22, wherein, The groove structure is in a strip shape, and the extension direction of the groove structure is parallel to the extension direction of the refrigerant channel.

24. The heat dissipating device of claim 23, wherein, Each of the groove structures extends from one end of the refrigerant channel to the other end of the refrigerant channel.

25. The heat dissipating device according to claim 1, wherein The second heat sink and the refrigerant channel are an integral molding structure.

26. An electrically controlled device, characterized by The electric control device comprises a mainboard, a power device, and the heat dissipation device as claimed in any one of claims 1 to 25, the power device is arranged on the mainboard and is in heat conduction connection with the first heat sink in the heat dissipation device.

27. The electrically controlled device according to claim 26, wherein, The electric control device further comprises a support fence, the support fence is mounted on the mainboard, and one end of the support fence away from the mainboard is provided with a mounting area and a support part, the power device is mounted on the mounting area, the pins of the power device are electrically connected with the mainboard, and the first heat sink is mounted on the support part, and the power device is clamped between the support fence and the first heat sink.

28. An outdoor unit, characterized by comprising: The electric control device as claimed in claim 26 or 27 is provided.

29. The outdoor unit of claim 28, wherein, The outdoor unit comprises: a cabinet, an accommodating cavity is formed in the cabinet; a partition assembly arranged in the accommodating cavity and separating the accommodating cavity into a first cavity and a second cavity; a fan arranged in the first cavity; wherein the electric control device is mounted on the partition assembly and located in the second cavity, the cabinet is provided with a wind-cooled air inlet, the partition assembly is provided with a wind-cooled air outlet, the wind-cooled air inlet communicates the second cavity with the outside, and the wind-cooled air outlet communicates the first cavity and the second cavity.

30. An air conditioner, comprising: The air conditioner comprises a refrigerant circulation pipeline and the outdoor unit as claimed in claim 28 or 29, and the refrigerant circulation pipeline communicates with the refrigerant channel.

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