Heat exchange structure and inverter

Abstract

The invention discloses a heat exchange structure and an inverter, the heat exchange structure is used for dissipating heat for a closed cavity, the closed cavity is provided with a mounting plate parallel to a first direction, the heat exchange structure is characterized in that the heat exchange structure is communicated with the closed cavity and protrudes out of the mounting plate, and the heat exchange structure comprises at least one heat exchange tube group; the heat exchange tube set comprises a plurality of heat exchange tubes arranged at intervals in the first direction, the heat exchange structure is further provided with a plurality of fins arranged at intervals in the second direction, air channels are formed between the fins to take away heat of the heat exchange tubes, and the extension distance of the projection plane of the heat exchange tubes in the second direction in the first direction is larger than or equal to the extension distance of the projection plane in the third direction. The first direction, the second direction and the third direction are perpendicular to one another, and the second direction is also the extending direction of the heat exchange tube body. The inverter adopts the heat exchange structure. The LED lamp is stable in structure and high in heat dissipation efficiency.

Description

[0001] Cross - reference to related applications This application claims the priority of a Chinese application filed on December 19, 2023 202311755804.8 , the content of which is incorporated herein by reference in its entirety. Technical Field

[0002] The present invention relates to the field of heat dissipation, and particularly to a heat exchange structure and an inverter. Background Art

[0003] As the power of inverters increases and their integration becomes higher, the losses of components such as power devices, magnetic devices, fuses, switches, and capacitors in the inverter chassis further increase, and the heat flux density also becomes larger. Since thermosensitive components such as electrolytic capacitors are arranged inside the chassis, the temperature rise inside the chassis directly determines the performance of these components. Currently, the inverter chassis mainly relies on natural heat dissipation through the chassis wall to the outside. However, this heat dissipation method has limited heat dissipation ability, resulting in ineffective cooling inside the chassis, which affects the lifespan and reliability of internal components, and further affects the overall service life of the inverter.

[0004] In the prior art, an air heat exchanger is used to dissipate heat from the components inside the chassis. This air heat exchanger generally includes two oppositely arranged air - collecting cavities and a tubular channel connecting the two air - collecting cavities. The two air - collecting cavities are connected to the inside of the chassis so that the heat inside the chassis can be dissipated through the heat exchanger. To improve the heat dissipation efficiency, the tubular channels are often arranged in multiple layers along the height direction of the air - collecting cavity, and heat - dissipating fins are arranged between adjacent layers of tubular channels. However, when the inverter is actually used, it is generally installed in a wall - mounted manner. After wall - mounting, the tubular channels are parallel to the wall. The heat generated inside the chassis enters the tubular channel after being dissipated through the air - collecting cavity. Due to the long pipeline and insufficient driving force, when the hot air flows in the channel, it is easy to float upward and accumulate at the upper part of the pipeline due to the principle of thermal expansion and contraction, resulting in the heat - dissipating fins outside the tubular channel being unable to dissipate heat efficiently, thus causing low heat dissipation efficiency of the whole machine. Summary of the Invention

[0005] The object of the present invention is to overcome the above - mentioned defects or problems in the background art, and provide a heat exchange structure and an inverter with stable structure and high heat dissipation efficiency.

[0006] To achieve the above - mentioned object, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0007] Technical solution 1: The sealed cavity is provided with a mounting plate parallel to the first direction. It is characterized in that the heat exchange structure communicates with the sealed cavity and protrudes outside the mounting plate. It includes at least one heat exchange tube group. The heat exchange tube group includes several heat exchange tubes arranged at intervals along the first direction. The heat exchange structure is also provided with several fins arranged at intervals along the second direction. An air passage is formed between the fins to take away the heat of each heat exchange tube. The extension distance of the projection plane of the heat exchange tube along the first direction in the second direction is greater than or equal to its extension distance along the third direction. The first direction, the second direction and the third direction are perpendicular to each other, and the second direction is also the extension direction of the main body of the heat exchange tube.

[0008] Based on Technical solution 1, there is also Technical solution 2. In Technical solution 2, a wind collecting cavity and an air outlet cavity are further provided at both ends of the heat exchange structure. The wind collecting cavity and the air outlet cavity both extend along the third direction and communicate with each heat exchange tube and the sealed cavity.

[0009] Based on Technical solution 1, there is also Technical solution 3. In Technical solution 3, the number of the heat exchange tube groups is multiple groups. Each group of heat exchange tubes is arranged in layers along the third direction, and the extension distance of the projection plane of the entire heat exchange structure along the first direction in the second direction is greater than or equal to its extension distance along the third direction.

[0010] Based on Technical solution 2 or 3, there is also Technical solution 4. In Technical solution 4, the fins surround each heat exchange tube and connect each heat exchange tube into a whole. Each heat exchange tube penetrates through each fin along its second direction, and an air passage parallel to the first direction is formed between each heat exchange tube.

[0011] Technical solution 5: The present invention also provides an inverter, which includes a housing. A mounting plate parallel to the first direction is provided inside the housing. The mounting plate divides the housing into a heat dissipation cavity and a sealed cavity. The mounting plate is provided with a first air outlet and a second air outlet opened along the third direction at intervals along the second direction. The heat dissipation cavity is provided with an air inlet opened along the first direction and an air outlet communicated with the air inlet to form an air flow flowing along the first direction; a heat generating component, which is placed in the sealed cavity; a heat exchange structure, which is as described in any one of Technical solutions 1 to 4 and is placed in the heat dissipation cavity. The heat exchange tube communicates with the first air outlet and the second air outlet. At least part of the heat exchange tube is opposite to the mounting plate so that an interval is formed between the fins on the part of the heat exchange tube and the outer surface of the mounting plate; a radiator, which is placed in the heat dissipation cavity and is used for dissipating heat of at least part of the heat generating components. It is provided with heat dissipation fins at least part of which are located in the interval between the mounting plate and the fins. Each heat dissipation fin is arranged at intervals along the second direction and is perpendicular to the second direction; and a heat dissipation fan, which is placed in the heat dissipation cavity and is adapted to drive air to flow from the air inlet through the heat exchange tube and the heat dissipation fins to the air outlet synchronously.

[0012] Based on Technical Solution Five, there is also a Technical Solution Six. In Technical Solution Six, there is also an air duct mounting plate. One end of the air duct mounting plate extends to the air outlet, and the other end extends to the side of the heat exchange tube away from the air inlet, so as to form a first air flow area and a second air flow area that are separated from each other on the air outlet side of the heat exchange structure; at least part of the radiator is also located in the second air flow area; the heat dissipation fins located between the heat exchange tube and the mounting plate are defined as the first heat dissipation fins, and the heat dissipation fins located in the second air flow area are defined as the second heat dissipation fins; a wind passing gap extending in the first direction is formed between the air duct mounting plate and the free end of the second heat dissipation fins; the heat dissipation fan is adapted to drive air to flow from the air inlet through the heat exchange tube and the first air flow area to the air outlet in sequence, and is also adapted to drive air to flow from the air inlet through the gaps between the first heat dissipation fins and the gaps between the second heat dissipation fins to the air outlet in sequence.

[0013] Based on Technical Solution Six, there is also a Technical Solution Seven. In Technical Solution Seven, along the direction away from the mounting plate, the height of the second heat dissipation fins is greater than the height of the first heat dissipation fins; the air outlet is opened along the third direction and is away from the air inlet; the air duct mounting plate is provided with a wind guiding groove extending in the first direction and facing away from the mounting plate; one end of the wind guiding groove is connected to the end of the heat exchange tube close to the mounting plate, and the other end is opposite to the air outlet and is provided with a wind guiding plate inclined towards the air outlet; the wind guiding groove, the wind guiding plate and the cavity wall of the heat dissipation cavity near the notch of the wind guiding groove cooperate to form the first air flow area; a wind passing gap extending in the first direction is formed between the outer surface of the bottom wall of the wind guiding groove and the free end of the second heat dissipation fins.

[0014] Based on Technical Solution Seven, there is also a Technical Solution Eight. In Technical Solution Eight, there is also an electrical component to be heat dissipated placed in the heat dissipation cavity; the air duct mounting plate is also provided with a first side plate and a second side plate on both sides of each second heat dissipation fin along the second direction respectively; both ends of the first side plate and the second side plate along the third direction are connected to the mounting plate and the wind guiding groove respectively, and the first side plate and the second side plate cooperate with the two side walls of the wind guiding groove to form a first air separation plate and a second air separation plate respectively; a wind passing area separated from both the first air flow area and the second air flow area is formed between the first air separation plate and / or the second air separation plate and the cavity wall of the heat dissipation cavity; at least part of the electrical component to be heat dissipated is located in the wind passing area, and the heat dissipation fan is also adapted to drive the air flow to flow from the air inlet through the wind passing area to the air outlet.

[0015] Based on Technical Solution Eight, there is also a Technical Solution Nine. In Technical Solution Nine, air outlet parts and air collecting parts communicated with the closed cavity are oppositely arranged at both ends of the heat exchange structure; the second air separation plate is located inside the air outlet part and forms the wind passing area between it and the cavity wall of the heat dissipation cavity, and a wind passing area communicated with the wind passing area is formed between the air outlet part and the side wall of the corresponding housing; at least part of the electrical component to be heat dissipated is also located in the wind passing area.

[0016] Based on Technical Solution Nine, there is also Technical Solution Ten. In Technical Solution Ten, the number of cooling fans is multiple, and each cooling fan is arranged on the air inlet side of the heat exchange structure and the radiator along the second direction and is an exhaust fan; the electrical component to be cooled includes a boost inductor and an inverter inductor; the boost inductor is arranged at intervals along the second direction on the air inlet side of the cooling fan; the inverter inductor is located on the air outlet side of the cooling fan, wherein, some of the inverter inductors are placed vertically in the air passage area, and some of the inverter inductors are placed horizontally in the air passing area.

[0017] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solutions and their preferred embodiments of the present invention have the following beneficial effects due to the following technical means:

[0018] The applicant has continuously observed, experimented and studied and found that in the prior art solution, the reason for the technical problem of "the tubular channel is prone to collapse and the heat exchange efficiency is low" is that each layer of tubular channel has a relatively large area, the strength in the middle is weak, and there are heat dissipation fins between adjacent tubular channels. The tubular channel will bear the weight of the heat dissipation fins. Especially the bottom tubular channel will bear the upper heat dissipation fins and the heat of the tubular channel transmitted through the heat dissipation fins. Therefore, the middle of the tubular channel is prone to collapse and even break due to the collapse. Similarly, the use of a large-area tubular channel will also lead to the technical problem of "low heat exchange efficiency". The main reason is that when the inverter is actually used, it is generally installed on the wall. After being installed on the wall, the tubular channel is parallel to the wall. The heat generated in the chassis is dissipated through the air collecting cavity and then enters the tubular channel. Since the pipeline is long and the driving force is insufficient, the hot air flow is prone to float up and accumulate at the upper part of the pipeline due to the principle of thermal expansion and contraction when flowing in the channel, resulting in the heat dissipation fins outside the tubular channel being unable to dissipate heat efficiently, thus causing the low heat dissipation efficiency of the whole machine.

[0019] In Technical Solution 1, compared with the structure of an entire heat exchange tube, the surface area of each heat exchange tube in this solution is relatively reduced. Therefore, a relatively large strength can be configured for each heat exchange tube. Similarly, due to the structure of using a plurality of heat exchange tubes, during actual use, a wall-mounted installation is generally adopted. The heat generated in the chassis is dispersed into each heat exchange tube after being dissipated through the air collecting cavity, and is dissipated through the fins outside each heat exchange tube. Moreover, since the tube diameter of each heat exchange tube is smaller than that of the prior art, the air flow velocity is relatively fast. In this way, on the one hand, the heat dissipation efficiency of the whole machine can be improved, and on the other hand, the faster the air flow velocity, the more the problem of hot air accumulation at the upper part of the pipeline caused by thermal expansion and contraction can be improved. Therefore, the heat dissipation efficiency can also be improved in each heat exchange tube. Thus, by adopting the structure of a plurality of heat exchange tubes, the heat dissipation efficiency of the whole machine can be improved in multiple aspects. In addition, an air duct is formed between the fins. When the air flow passes through this air duct, the heat on the surface of the heat exchange tube can be quickly carried away, especially the surfaces opposite to and away from the mounting plate, with high heat dissipation efficiency, and the air flow is enabled to flow in the first direction to achieve a flow guiding function. The heat of the heat exchange tubes located downstream of the air flow can also be quickly carried away, further improving the heat dissipation efficiency. When this heat exchange structure is used to dissipate heat from an enclosed cavity, it can ensure continuous and stable heat dissipation for the enclosed cavity. Additionally, by adopting the heat exchange tube structure in Technical Solution 1, since the projection surface of the heat exchange tube in the second direction extends a distance greater than or equal to its extension distance in the third direction along the first direction, the space in the third direction will not be overly occupied, so that other components can be stacked below the heat exchange tubes, making the entire inverter thinner, lighter, and more compact.

[0020] In Technical Solution 2, each heat exchange tube collects hot air from the air collecting cavity, and discharges cold air into the air outlet cavity after heat exchange. In this way, both the hot air and the cold air are concentrated together, with a large air volume and high heat dissipation efficiency.

[0021] In Technical Solution 3, the number of the heat exchange tube groups is multiple, and each group of heat exchange tubes is arranged in layers along the third direction. Moreover, the projection surface of the entire heat exchange structure in the second direction extends a distance greater than or equal to its extension distance in the third direction along the first direction. In this way, on the one hand, the heat exchange path can be increased by multiple groups of heat exchange tubes to ensure the heat dissipation efficiency, and on the other hand, the space occupation problem in the third direction can be taken into account at the same time, and the entire inverter can also be made thinner, lighter, and more compact. In addition, the heat exchange tube groups are centrally arranged at the top of the air collecting part also considering that the hot air outlet speed is relatively fast and is likely to accumulate in the top area of the air collecting part. Such an arrangement can improve the air intake efficiency of the heat exchange tubes.

[0022] In the fourth technical solution, a plurality of fins surrounding each heat exchange tube are arranged at intervals along the first direction of the heat exchange tube to connect the heat exchange tubes into a whole. Therefore, each fin can also form multi-point support and reinforcement for each heat exchange tube in the first, second, and third directions of the heat exchange tube. Especially in the second direction, it effectively prevents the middle part of the heat exchange tube from collapsing and breaking, and improves the stability of the heat exchange structure. More preferably, each fin can also conduct heat between the heat exchange tubes, so that the heat exchange tubes have a uniform temperature effect. This advantage is more prominent when the number of heat exchange tubes along the air passing direction is large, thus improving the uniform temperature of each heat exchange tube and avoiding local overheating. Each heat exchange tube penetrates through each fin along its extending direction, which is easy to process, and means that the fin is perpendicular to the extending direction of the heat exchange tube, so that an air passage extending along the first direction is formed between adjacent fins, and the air flow is smooth. Each fin also surrounds each connecting tube, so that the fin can conduct heat and guide air between the connecting tubes, improving the uniform temperature and achieving multi-point support in the third direction, further increasing the strength of the heat exchange tube.

[0023] The sixth technical solution has the technical effects of any one of the first to fifth technical solutions. Among them, the heating component dissipates heat through the heat exchange structure and the radiator. In this way, both the protection of the heating component is ensured, and the whole inverter has a high heat dissipation efficiency. Among them, at least part of the heat exchange tube is opposite to the mounting plate, so that a gap is formed between the fin on this part of the heat exchange tube and the outer surface of the mounting plate, allowing the heat dissipation fins for dissipating heat from the sealed cavity to protrude. Thus, the gap between the heat exchange tube and the outer surface of the mounting plate can be fully utilized to place the heat dissipation fins, with a clever layout and high space utilization rate. Moreover, the heat dissipation fins and the heat exchange tube are in a parallel air duct, so that the heat dissipation of the heat dissipation fins and the heat exchange tube does not interfere with each other, and the heat dissipation efficiency is high. The first air outlet and the second air outlet are arranged at intervals along the second direction. After the heat exchange structure is placed in the heat dissipation cavity, the air flow is smooth when passing through the heat exchange structure and the heat dissipation fins.

[0024] In the sixth technical solution, the setting of the air duct mounting plate avoids the influence of the heat of the heat exchange tube on the second heat dissipation fins on the air outlet side of the heat exchange structure, so that the second heat dissipation fins have a high heat dissipation efficiency. In addition, an air passage gap extending along the first direction is formed between the air duct mounting plate and the free end of the second heat dissipation fins, ensuring the timely heat dissipation of the free end of the second heat dissipation fins, thus improving the heat dissipation efficiency of the second heat dissipation fins as a whole.

[0025] In technical solution seven, the height of the second heat dissipation fin is greater than that of the first heat dissipation fin in the direction away from the mounting plate, making full use of the space on the air outlet side of the heat exchange tube to increase the heat dissipation efficiency of the radiator; the structural arrangement of the air guide groove and the air guide plate allows the airflow to flow smoothly through the heat exchange tube into the first air flow area and the air outlet is smooth, thereby ensuring that the heat exchange structure has a high heat dissipation efficiency. The air outlet is opened along the third direction, so that when the inverter is hung on the wall, the first direction is the height direction, the air inlet is located below, and the air outlet is facing the wall, it can prevent water droplets or foreign matter from entering the heat dissipation cavity from the air outlet, effectively improving the protection of the heat dissipation cavity.

[0026] In Technical Solution Eight, the structural arrangement of the air duct mounting plate is capable of forming a first airflow zone, a second airflow zone, and an airflow zone separated from the first airflow zone and the second airflow zone. The air ducts in the first airflow zone, the second airflow zone, and the airflow zone are connected in parallel without interfering with each other. The electrical components to be cooled with relatively low protection requirements are placed in the airflow zone of the heat dissipation cavity and cooled by air cooling. The layout is reasonable and ingenious, with high space utilization, which effectively improves the temperature uniformity of the heating components and the electrical components to be cooled.

[0027] In technical solution nine, the temperature of the air outlet of the heat exchange structure is relatively low, and an air outlet area connected to the wind pass area is formed between the air outlet and the corresponding side wall of the shell. Some electrical components to be dissipated are placed in the air outlet area, and some electrical components to be dissipated are placed horizontally in the wind pass area, thereby further improving the space utilization without affecting the heat dissipation efficiency.

[0028] In the technical solution 10, since the boost inductor generates less heat and the inverter inductor generates more heat, the boost inductor with less heat is placed on the air inlet side of the cooling fan, and the inverter inductor is placed on the air outlet side of the cooling fan. The airflow temperature of the cooling fan passing through the boost inductor is still low, which can simultaneously take away the heat of the heat exchange structure, radiator and inverter inductor. The entire heat dissipation cavity has a good heat dissipation effect, thereby ensuring the stable operation of the entire inverter. Part of the inverter inductor is placed in the wind-passing area, and part of the inverter inductor is placed horizontally in the wind-passing area, which further improves the space utilization without affecting the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 is a schematic diagram of an inverter according to Embodiment 1 of the present invention;

[0031] Figure 2Cross-sectional view of the inverter according to Embodiment 1 of the present invention along the second direction;

[0032] Figure 3 Cross-sectional view of the inverter according to Embodiment 1 of the present invention along the third direction;

[0033] Figure 4 Schematic diagram of the heat exchange structure according to Embodiment 1 of the present invention;

[0034] Figure 5 Schematic diagram of the inverter with the top wall hidden according to Embodiment 1 of the present invention;

[0035] Figure 6 Top view of the inverter with the top wall hidden according to Embodiment 1 of the present invention;

[0036] Figure 7 Schematic diagram of the air duct mounting plate according to Embodiment 1 of the present invention;

[0037] Figure 8 Schematic diagram of the heat exchange structure according to Embodiment 2 of the present invention;

[0038] Figure 9 Schematic diagram of the heat exchange structure according to Embodiment 3 of the present invention

[0039] Figure 10 Schematic diagram of the heat exchange structure according to Embodiment 4 of the present invention

[0040] Description of main reference numerals:

[0041] Housing 10; mounting plate 11; first air inlet 111; second air inlet 112; air inlet 12; air outlet 13; top wall 14; sealed cavity 01; heat dissipation cavity 02; heating component 20; heat exchange structure 30; heat exchange tube 31; fin 32; air collecting box 33; air outlet box 34; connecting portion 351; air collecting portion 352; air outlet portion 353; radiator 40; heat dissipation substrate 41; first heat dissipation fin 42; second heat dissipation fin 43; heat dissipation fan 50; air duct mounting plate 60; air guiding groove 61; air guiding plate 62; first side plate 63; second side plate 64; first air flow region 03; second air flow region 04; air passage region 05; air passing region 06; electrical component to be cooled 70; boost inductor 71; inverter inductor 72; baffle 80. Detailed description of the invention

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are used to distinguish different objects rather than to describe a specific order.

[0044] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0045] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, it includes non-detachable fixed connection, detachable fixed connection, being integrated as one body, and being fixedly connected through other devices or elements.

[0046] In the present invention, the heat exchange tube can be a straight hard tube or a bent hard tube; when the heat exchange tube is a straight hard tube, the extending direction of the heat exchange tube body is the length direction of the heat exchange tube; when the heat exchange tube is a bent hard tube, the heat exchange tube is composed of multiple heat exchange sections, and the extending direction of the heat exchange tube body corresponds to the length direction of the longest heat exchange section.

[0047] In the claims, the description and the above-mentioned drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0048] Embodiment 1

[0049] See Figure 1-7 , Figure 1-7 shows an inverter, which includes a housing 10, a heat generating component 20, a heat exchange structure 30, a radiator 40, a cooling fan 50, an air duct mounting plate 60 and an electrical component to be cooled 70.

[0050] See Figure 1 , the housing 10 is generally in the shape of a cuboid, which has four side walls connected end to end, a top wall 14 and a bottom wall. The first direction is the width direction of the housing 10, the second direction is the length direction of the housing 10, the third direction is the height direction of the housing 10, and the first direction, the second direction and the third direction are perpendicular to each other. See Figure 2, an installation plate 11 parallel to the first direction is provided inside the housing 10. The installation plate 11 extends from one end to the other end of the housing 10 in the second direction, dividing the housing 10 into a heat dissipation cavity 02 and an airtight cavity 01 arranged in the third direction. First air vents 111 and second air vents 112 are arranged at intervals along the second direction on the installation plate 11 and are opened in the third direction. Still referring to Figure 1 , the heat dissipation cavity 02 is provided with an air inlet 12 opened in the first direction and an air outlet 13 communicated with the air inlet 12 to form an air flow flowing in the first direction. Figure 1 , the air inlet 12 is opened in the front side wall of the housing 10 in the first direction, and the air outlet 13 is opened in the top wall 14 of the housing 10 in the third direction and is far away from the air inlet 12, so that the heat dissipation cavity 02 has a ventilation function. Relatively speaking, the airtight cavity 01 is a closed cavity, and the air circulation in the airtight cavity 01 is all internal circulation. In this way, devices with relatively high performance requirements for waterproofing, dustproofing, or corrosion prevention in the inverter can be arranged in the airtight cavity 01, while devices without such protection requirements or with relatively low protection requirements can be arranged in the heat dissipation cavity 02. The first air vents 111 and the second air vents 112 communicate the airtight cavity 01 and the heat dissipation cavity 02, so that the heat in the airtight cavity 01 can be dissipated not only through the natural heat dissipation of the housing 10 wall, but also through the heat dissipation cavity 02, realizing effective cooling. In this embodiment, both the air inlet 12 and the air outlet 13 are rectangular.

[0051] In specific implementation, a rectangular through hole is also opened on the installation plate 11, and the heat dissipation substrate 41 of the radiator 40 for dissipating heat from the airtight cavity 01 in the following text can block the rectangular through hole. The first air vents 111 and the second air vents 112 are respectively located on both sides of the rectangular through hole along the second direction.

[0052] The heating component 20 is placed in the airtight cavity 01. In some embodiments, the heating component 20 is a power component such as a capacitor or an IGBT, and it has relatively high requirements for protection. Devices with relatively large heat generation, such as IGBTs, can be attached to the heat dissipation substrate 41 of the radiator 40 so that the heat can be taken away by the radiator 40 in time. A turbulent flow fan is also arranged in the airtight cavity 01, so that the heat flow in the airtight cavity 01 can flow into the heat dissipation cavity 02 through one of the first air vents 111 and the second air vents 112, and then the cooled air flow can be recovered through the other one. In practical applications, the layout can be arranged according to the heat dissipation priority of the heating component 20 to ensure the heat dissipation efficiency of each electrical component of the heating component 20. The layout of the electrical components in the airtight cavity 01 does not belong to the improved part of this application and will not be elaborated in detail here.

[0053] The heat exchange structure 30 is used to dissipate heat from the sealed cavity 01. It is placed in the heat dissipation cavity 02 and includes three groups of heat exchange tube groups which are arranged in layers in the third direction. Taking one of the following heat exchange tube groups A as an example for illustration, the heat exchange tube group A includes a number of heat exchange tubes 31 arranged at intervals in the first direction. The two ends of the heat exchange tubes 31 are respectively communicated with the first air outlet 111 and the second air outlet 112. The heat exchange structure 30 is also provided with a number of fins 32 arranged at intervals in the second direction. Air ducts are formed between the fins 32 to take away the heat of each heat exchange tube 31. The projection surface of the heat exchange tube 31 in the second direction extends a distance greater than or equal to its extension distance in the third direction along the first direction. At least part of the heat exchange tube 31 is opposite to the mounting plate 11 so that a gap is formed between the fins 32 on this part of the heat exchange tube 31 and the outer surface of the mounting plate 11.

[0054] Compared with the structure of a whole piece of heat exchange tube 31, the surface area of each heat exchange tube 31 in this solution is relatively reduced. Therefore, each heat exchange tube 31 can be configured with greater strength. In addition, with this heat exchange tube 31 structure, since the projection surface of the heat exchange tube 31 in the second direction extends a distance greater than or equal to its extension distance in the third direction along the first direction, it will not occupy too much space in the third direction. Thus, other devices can be stacked below the heat exchange tube 31, making the whole inverter thinner, lighter and more compact.

[0055] In this embodiment, air collecting cavities and air outlet cavities are also provided at both ends of the heat exchange structure 30. The air collecting cavities and air outlet cavities both extend in the third direction and are communicated with each heat exchange tube 31 and the sealed cavity 01. That is to say, the heat exchange tubes 31 are not directly communicated with the sealed cavity 01, but are communicated with the sealed cavity 01 through the air collecting cavities and air outlet cavities. Specifically, an air collecting box 33 and an air outlet box 34 are respectively arranged oppositely at both ends of the heat exchange structure 30. The opposite sides of the air collecting box 33 and the air outlet box 34 are provided with openings corresponding to each heat exchange tube 31 one by one. Each heat exchange tube 31 can be hermetically connected to the corresponding opening by welding or plugging. The ends of the air collecting box 33 and the air outlet box 34 close to the mounting plate 11 both form flange structures to be hermetically fixed to the mounting plate 11. The inner cavities of the air collecting box 33 and the air outlet box 34 respectively form air collecting cavities and air outlet cavities. The arrangement of the air collecting box 33 and the air outlet box 34 can also provide support for each heat exchange tube 31.

[0056] See Figure 3, each heat exchange tube 31 penetrates through each fin 32 along the second direction; wherein, the cross-section of the heat exchange tube 31 is flat, and an air passage parallel to the first direction is formed between each pair of heat exchange tubes 31. In this embodiment, the air collecting box 33 and the air outlet box 34 can respectively form the air collecting part and the air outlet part of the heat exchange structure 30, and the heat exchange tubes 31 form the connecting part connecting the air collecting part and the air outlet part of the heat exchange structure 30. Due to the structure of a plurality of heat exchange tubes 31, during actual use, it is generally installed in a wall-mounted manner. The heat generated in the chassis is dissipated through the air collecting cavity and then dispersed into each heat exchange tube 31, and is dissipated through the fins 32 outside each heat exchange tube 31; and since the diameter of each heat exchange tube 31 is smaller than that of the prior art, the air flow velocity is relatively fast. Thus, on the one hand, the heat dissipation efficiency of the whole machine is improved, and on the other hand, the faster the air flow velocity, the more the problem of hot air accumulation at the upper part of the pipeline caused by thermal expansion and contraction can be improved. Therefore, the heat dissipation efficiency can also be improved in each heat exchange tube 31. Thus, by adopting the structure of a plurality of heat exchange tubes, the heat dissipation efficiency of the whole machine can be improved in multiple aspects.

[0057] It should be noted that in the wall-mounted state, the reason why the hot air does not accumulate at the upper part of the air collecting cavity in the first direction is that, on the one hand, the air flow velocity in the air collecting cavity is relatively fast, and on the other hand, the length of the air collecting cavity is relatively short. Therefore, the hot air enters each heat exchange tube 31 before it accumulates.

[0058] In addition, in this embodiment, the number of the heat exchange tube groups is three, and the three groups of heat exchange tubes are arranged in layers along the third direction, and the projection plane of the whole heat exchange structure 30 in the second direction extends a distance greater than or equal to its extension distance in the third direction along the first direction. Thus, on the one hand, the heat exchange path can be increased by the three groups of heat exchange tubes to ensure the heat dissipation efficiency, and on the other hand, the space occupation problem in the third direction can be taken into account at the same time, and the whole inverter can also be made thin and compact. In addition, the heat exchange tube groups are centrally arranged at the top of the air collecting part also considering that the hot air outlet speed is relatively fast and is easy to gather in the top area of the air collecting part. Such an arrangement can improve the air inlet efficiency of the heat exchange tubes. In other embodiments, the heat exchange tube group can also be one group, two groups or more groups. Of course, when arranging multiple groups, the installation space position should still be considered synchronously.

[0059] See Figure 2 and Figure 4, the heat sink 40 is placed in the heat dissipation cavity 02 and is used to dissipate heat for at least part of the heat - generating components 20. The heat sink 40 includes a heat - dissipation substrate 41 and a number of heat - dissipation fins protruding from the heat - dissipation substrate 41. The heat - dissipation fins are arranged at intervals along the second direction and are perpendicular to the second direction. Heat - dissipation channels extending along the first direction are formed between the heat - dissipation fins. As described above, the heat - dissipation substrate 41 seals the rectangular through - hole of the mounting plate 11, and part of the heat - generating components 20 are attached to the heat - dissipation substrate 41 so as to transfer heat to the heat - dissipation substrate 41, and the heat of the heat - dissipation substrate 41 is further transferred to the heat - dissipation fins. It should be understood that in other embodiments, the mounting plate 11 may not be provided with a rectangular through - hole, and the heat - dissipation substrate 41 may also be directly mounted on the mounting plate 11, and the heat of the heat - generating components 20 can be transferred to the heat - dissipation substrate 41 through the mounting plate 11.

[0060] In this embodiment, the heat sink 40 is provided with heat - dissipation fins at least partially located within the interval between the mounting plate 11 and the fins 32. That is to say, the projection of the heat - exchange structure 30 and the heat sink 40 along the third direction partially overlaps. The heat - dissipation fan 50 is placed in the heat - dissipation cavity 02 and is adapted to drive air to flow from the air inlet 12 through the heat - exchange tubes 31 and the heat - dissipation fins to the air outlet 13 synchronously.

[0061] See Figure 1 and Figure 4 , the air inlet of the heat - dissipation fan 50 is arranged facing the air inlet 12, the air outlet 13 of the heat - dissipation fan 50 is arranged facing the heat - exchange structure 30 and the heat sink 40. There are multiple heat - dissipation fans 50, and each heat - dissipation fan 50 is arranged at intervals along the second direction and the axis of the heat - dissipation fan 50 extends along the first direction. The axis of the heat - dissipation fan 50 is located within the interval between the heat - dissipation fins and the fins 32. Therefore, the heat - dissipation fins, the heat - exchange tubes 31 and the fins 32 are all located in the strong - wind area of the heat - dissipation fan 50, and the heat - dissipation efficiency is high. The heat - dissipation fan 50 is an exhaust fan in this embodiment. Among them, the heat - dissipation fan 50 covers part of the heat - exchange tubes 31, but does not cover part of the air - collecting box 33 and the air - outlet box 34.

[0062] In this embodiment, the projected area of the heat sink 40 along the third direction is larger than the projected area of the heat - exchange structure 30 along the third direction. That is to say, on the air - outlet side of the heat - exchange structure 30, the heat sink 40 still has heat - dissipation fins. Figure 4 In, the heat - dissipation fins of the heat sink 40 extend to the rear side wall of the housing 10 ( Figure 4In order to improve the heat dissipation efficiency of the radiator 40, mainly to prevent the hot air passing through the heat exchange tube 31 from flowing to the heat dissipation teeth on the air outlet side of the heat exchange tube 31, an air duct mounting plate 60 is also provided, one end of the air duct mounting plate 60 extends to the air outlet 13, and the other end extends to the side of the heat exchange tube 31 away from the air inlet 12, so as to form a first air flow area 03 and a second air flow area 04 separated from each other on the air outlet side of the heat exchange structure 30, wherein the air duct mounting plate 60 should extend to the bottom end of the heat exchange tube 31 at the bottom end; the radiator 40 is also at least partially located in the second air flow area 04.

[0063] The heat dissipation fin located between the heat exchange tube 31 and the mounting plate 11 is defined as the first heat dissipation fin 42, and the heat dissipation fin located in the second air flow area 04 is defined as the second heat dissipation fin 43; a wind gap extending along the first direction is formed between the air duct mounting plate 60 and the free end of the second heat dissipation fin 43; the heat dissipation fan 50 is suitable for driving wind from the air inlet 12 to pass through the heat exchange tube 31 and the first air flow area 03 to flow to the air outlet 13 in sequence, and is also suitable for driving wind from the air inlet 12 to pass through the gap between the first heat dissipation fin 42 and the gap between the second heat dissipation fin 43 to flow to the air outlet 13 in sequence. The arrangement of the air duct mounting plate 60 prevents the second heat dissipating fin 43 located on the air outlet side of the heat exchange structure 30 from being affected by the heat of the heat exchange tube 31, so that the second heat dissipating fin 43 has a higher heat dissipation efficiency. In addition, a wind gap extending along the first direction is formed between the air duct mounting plate 60 and the free end of the second heat dissipating fin 43, ensuring timely heat dissipation of the free end of the second heat dissipating fin 43, thereby improving the overall heat dissipation efficiency of the second heat dissipating fin 43.

[0064] Furthermore, in the direction away from the mounting plate 11, the height of the second heat dissipation fin 43 is greater than the height of the first heat dissipation fin 42, thereby making full use of the space on the air outlet side of the heat exchange tube 31 to increase the heat dissipation efficiency of the radiator 40. In this embodiment, the first heat dissipation fin 42 and the second heat dissipation fin 43 are both located on the same heat dissipation substrate 41. During the processing, the second heat dissipation fin 43 of the same height can be firstly made on the heat dissipation substrate 41, and then part of the second heat dissipation fin 43 can be shortened to become the first heat dissipation fin 42 with a lower height. However, it should be understood that in other embodiments, the heat dissipation substrates corresponding to the first heat dissipation fin 42 and the second heat dissipation fin 43 can also be different heat dissipation substrates.

[0065] See also Figure 5-6, the air duct mounting plate 60 is provided with an air guiding groove 61 extending in the first direction and facing away from the mounting plate 11, and the notch of the air guiding groove 61 faces the top wall 14 of the housing 10; one end of the air guiding groove 61 is connected to one end of the heat exchange tube 31 close to the mounting plate 11, and the other end is opposite to the air outlet 13 and is provided with an air guiding plate 62 inclined towards the air outlet 13; the air guiding groove 61, the air guiding plate 62 and the cavity wall of the heat dissipation cavity 02 close to the notch of the air guiding groove 61 cooperate to form a first air flow area 03; an air passing gap extending in the first direction is formed between the outer surface of the bottom wall of the air guiding groove 61 and the free end of the second heat dissipation fin 43. The structural setting of the air duct mounting plate 60 enables the air outlet of the heat exchange tube 31 to be smooth, thus ensuring that the heat dissipation structure 30 has a high heat dissipation efficiency.

[0066] The air duct mounting plate 60 is further provided with a first side plate 63 and a second side plate 64 on both sides of each second heat dissipation fin 43 along the second direction respectively; both ends of the first side plate 63 and the second side plate 64 along the third direction are connected to the mounting plate 11 and the air guiding groove 61 respectively, and the first side plate 63 and the second side plate 64 cooperate with the two side walls of the air guiding groove 61 to form a first air separation plate and a second air separation plate respectively; an air passing area 06 separated from both the first air flow area 03 and the second air flow area 04 is formed between the first air separation plate and / or the second air separation plate and the cavity wall of the heat dissipation cavity 02; Figure 6 In it, the first air separation plate and the second air separation plate are located on the left and right respectively. The upstream ends (front ends) of the first air separation plate and the second air separation plate are respectively connected to the opposite side walls (i.e., the inner side walls) of the air collecting box 33 and the air outlet box 34, and the downstream ends (rear ends) of the first air separation plate and the second air separation plate extend to the lower end of the air outlet 13 but do not extend to the rear side wall of the housing 10. The second air separation plate is located inside the air outlet part 353 and an air passing area 06 is formed between the second air separation plate and the cavity wall of the heat dissipation cavity 02. The distance between the second air separation plate and the corresponding side wall of the housing 10 is greater than the distance between the air outlet part 353 and the corresponding side wall of the housing 10. An air passing area 05 communicated with the air passing area 06 is formed between the air outlet part 353 and the corresponding side wall of the housing 10. The air passing area 05 and the air passing area 06 form a series air duct, and the air passing area 05 is located upstream of the air passing area 06.

[0067] The electrical component 70 to be cooled is at least partially located in the air passing area 06 and at least partially located in the air flowing area 05. The cooling fan 50 is also adapted to drive the air flow to flow from the air inlet 12 through the air flowing area 05 and the air passing area 06 to the air outlet 13. The structural arrangement of the air duct mounting plate 60 forms a first air flow area 03, a second air flow area 04, and the air flowing area 05 and the air passing area 06 that are separated from both the first air flow area 03 and the second air flow area 04. The air ducts of the first air flow area 03, the second air flow area 04, and the air flowing area 05 are in parallel, and the air ducts of the first air flow area 03, the second air flow area 04, and the air passing area 06 are in parallel, without interfering with each other. The electrical component 70 to be cooled with relatively less demanding protection requirements is placed in the air flowing area 05 and the air passing area 06 of the cooling cavity 02 and cooled by air cooling. The layout is reasonable and ingenious, with high space utilization rate, effectively improving the temperature uniformity of the heating component 20 and the electrical component 70 to be cooled.

[0068] Specifically, the electrical component 70 to be cooled includes a boost inductor 71 and an inverter inductor 72; the boost inductor 71 is arranged at intervals along the second direction on the air inlet side of the cooling fan 50, and the inverter inductor 72 is located on the air outlet side of the cooling fan 50. Figure 5 and Figure 7 In, a total of three inverter inductors 72 are provided, one of the inverter inductors 72 is placed vertically in the air flowing area 05, and the other two inverter inductors 72 are placed horizontally in the air passing area 06. One of the cooling fans 50 faces the air flowing area 05.

[0069] Since the heat generation of the boost inductor 71 is small and the heat generation of the inverter inductor 72 is large, the boost inductor 71 with small heat generation is placed on the air inlet side of the cooling fan 50, and the inverter inductor 72 is placed on the air outlet side of the cooling fan 50. The temperature of the air flow passing through the boost inductor 71 by the cooling fan 50 is still low, which can synchronously take away the heat of the heat exchange structure 30, the radiator 40, and the inverter inductor 72. The entire cooling cavity 02 has a good heat dissipation effect, thus ensuring the stable operation of the entire inverter. The temperature of the air outlet part 353 of the heat exchange structure 30 is low. A air flowing area 05 communicating with the air passing area 06 is formed between the air outlet part 353 and the side wall of the corresponding housing 10. Part of the inverter inductors 72 are placed vertically in the air flowing area 05, and part of the inverter inductors 72 are placed horizontally in the air passing area 06, further improving the space utilization rate without affecting the heat dissipation efficiency.

[0070] In this embodiment, the heating component 20 dissipates heat through the heat exchange structure 30 and the radiator 40. Specifically, the airflow after being cooled by the heat exchange structure 30 flows into the sealed cavity 01 through the second air outlet 112 to dissipate heat from the heating component 20 in the sealed cavity 01, and then is taken into the first air inlet 111 by the turbulence fan in the sealed cavity 01 and re-enters the heat exchange tube 31 to complete one cycle; devices with a large amount of heat generation, such as IGBTs, can directly transfer heat to the heat dissipation substrate 41 of the radiator 40, and then transfer it to the heat dissipation fins through the heat dissipation substrate 41. The heat dissipation fan 50 takes the heat of the heat dissipation fins and the heat exchange structure 30 into the air outlet 13, thus ensuring the protection of the heating component 20; in this way, both the protection of the heating component 20 is ensured, and the entire inverter has a high heat dissipation efficiency; among them, when the heat dissipation fan 50 dissipates heat from the radiator 40 and the heat exchange structure 30, the air ducts of the radiator 40 and the heat exchange structure 30 are in parallel, so that the heat dissipation of the heat dissipation fins and the heat exchange tube 31 does not interfere with each other, and the heat dissipation efficiency is high. The first air inlet 111 and the second air outlet 112 are arranged at intervals along the second direction. After the heat exchange structure 30 is placed in the heat dissipation cavity 02, the air flow is relatively smooth when flowing through the heat exchange structure 30 and the heat dissipation fins.

[0071] The heat exchange structure 30 includes a number of heat exchange tubes 31 arranged along the first direction. Compared with the structure of a single integral heat exchange tube, the surface area of each heat exchange tube 31 in this solution is relatively reduced. Therefore, a relatively large strength can be configured for each heat exchange tube 31. At the same time, a number of fins 32 are arranged at intervals along the second direction of the heat exchange tubes 31 and surround each heat exchange tube 31 to connect each heat exchange tube 31 into a whole. Therefore, the fins 32 can also form multi-point support and reinforcement for each heat exchange tube 31 in the first, second, and third directions of the heat exchange tube 31, effectively preventing the middle part of the heat exchange tube 31 from collapsing and breaking, and improving the stability of the heat exchange structure 30. More preferably, the fins 32 can also conduct heat between the heat exchange tubes 31, enabling a temperature equalization effect between the heat exchange tubes 31. This advantage is more prominent when the number of heat exchange tubes 31 along the first direction is large, thereby improving the temperature equalization of each heat exchange tube 31 and avoiding local overheating. In addition, an air passage is formed between adjacent fins 32. When the air flow passes through this air passage, the heat on the surface of the heat exchange tube 31 can be quickly carried away, especially the surfaces of the heat exchange tube 31 opposite to and away from the mounting plate 11. The heat dissipation efficiency is high, and the air flow is enabled to flow along the first direction to achieve a guiding function. The heat of the heat exchange tube 31 located downstream of the air flow can also be quickly carried away, further improving the heat dissipation efficiency. Each heat exchange tube 31 penetrates through each fin 32 along its second direction, which is easy to process and means that the fins 32 are perpendicular to the second direction of the heat exchange tube 31, so that an air passage extending along the first direction is formed between adjacent fins 32, and the air flow flows smoothly. An air passage parallel to the first direction is formed between each heat exchange tube 31, and the fins 32 also surround each heat exchange tube 31, enabling the fins 32 to conduct heat and guide the air flow between the heat exchange tubes 31, improving the temperature equalization and achieving multi-point support in the third direction, further increasing the strength of the heat exchange tube 31. When this heat exchange structure 30 is used to dissipate heat from the sealed cavity 01, it can ensure continuous and stable heat dissipation for the sealed cavity 01.

[0072] Among them, the heat exchange tube 31 faces the mounting plate 11 so that an interval is formed between the fin 32 on the heat exchange tube 31 and the outer surface of the mounting plate 11 to allow the heat dissipation fins for dissipating heat from the sealed cavity 01 to protrude. Thus, the interval between the heat exchange tube 31 and the outer surface of the mounting plate 11 can be fully utilized to place the heat dissipation fins. The layout is ingenious, the space utilization rate is high, and the heat dissipation fins and the heat exchange tube 31 are in a parallel air duct, so that the heat dissipation of the heat dissipation fins and the heat exchange tube 31 does not interfere with each other, and the heat dissipation efficiency is high.

[0073] In an application scenario, the inverter is a wall-mounted inverter. The top wall 14 of the housing 10 faces the wall. The air inlet 12 is located at the lower end of the housing 10, and the air outlet 13 is located at the upper end of the housing 10 and faces the wall surface. The top wall 14 of the housing 10 is further provided with a protruding baffle 80 to prevent the hot air from the air outlet 13 from flowing back to the air inlet 12. In this embodiment, the air outlet 13 is opened on the top wall 14. Compared with opening on the side wall opposite to the air inlet 12, it can prevent rainwater or sundries from entering the heat dissipation cavity 02 through the air outlet 13, effectively improving the protection of the heat dissipation cavity 02, thereby ensuring the stable operation of the inverter.

[0074] Embodiment 2

[0075] Embodiment 2 is basically the same as Embodiment 1, except that, referring to Figure 8 , the cross-section of the heat exchange tube 31 is cylindrical. The cylindrical heat exchange tube 31 is beneficial to processing, and further makes the surface area of the heat exchange tube 31 smaller, so that when the length of the heat exchange tube 31 is longer, the middle part is not easily collapsed, deformed or even broken.

[0076] Embodiment 3

[0077] Embodiment 3 is basically the same as Embodiment 1, except that, referring to Figure 9 , the heat exchange structure 30 does not include a wind collecting cavity and an air outlet cavity. Both ends of each heat exchange tube 31 are bent inward to form a wind collecting part 352 and an air outlet part 353 communicating with the closed cavity 01. The middle part of the heat exchange tube 31 forms a connecting part 351 erected between the wind collecting part 352 and the air outlet part 353 and opposite to the outer surface of the mounting plate 11; each fin 32 is arranged around the heat exchange tubes 31 of the wind collecting part 352, the air outlet part 353 and the connecting part 351. In this embodiment, the cross-section of the heat exchange tube 31 is flat. This structure is convenient for processing. The air flow in each heat exchange tube 31 does not interfere with each other and directly blows into the closed cavity 01 and directly enters the heat exchange tube 31 from the closed cavity 01; each fin 32 is arranged around the heat exchange tubes 31 of the wind collecting part 352, the air outlet part 353 and the connecting part 351, so that each part of the heat exchange tube 31 has good temperature uniformity, support and strengthening. Among them, the bottoms of the wind collecting part 352 and the air outlet part 353 also form a flange structure to be fixedly connected with the mounting plate 11 in a sealed manner.

[0078] Embodiment 4

[0079] Embodiment 4 is basically the same as Embodiment 3, except that the cross-section of the heat exchange tube 31 is cylindrical.

[0080] The heat exchange tube 31 is cylindrical, which is beneficial to processing, and further makes the surface area of the heat exchange tube 31 smaller, so that when the length of the heat exchange tube 31 is longer, the middle part is not easily collapsed, deformed or even broken.

[0081] The descriptions of the above-mentioned specification and embodiments are used to explain the protection scope of the present invention, but do not constitute a limitation to the protection scope of the present invention. Modifications, equivalent replacements or other improvements to the embodiments of the present invention or some of its technical features obtained by those of ordinary skill in the art through logical analysis, reasoning or limited experiments in combination with common general knowledge, ordinary technical knowledge in this field and / or the prior art under the inspiration of the present invention or the above-mentioned embodiments shall all be included within the protection scope of the present invention.

Claims

1. A heat exchange structure (30) for dissipating heat from a closed chamber (01), wherein the closed chamber (01) is provided with a mounting plate (11) parallel to a first direction, wherein: The heat exchange structure (30) is connected to the closed cavity (01) and protrudes from the mounting plate (11), and comprises at least one heat exchange tube group, the heat exchange tube group comprising a plurality of heat exchange tubes (31) arranged at intervals along a first direction, the heat exchange structure (30) further comprising a plurality of fins (32) arranged at intervals along a second direction, an air passage is formed between each of the fins (32) to carry away the heat of each of the heat exchange tubes (31), the projection surface of the heat exchange tube (31) in the second direction extends along the first direction for a distance greater than or equal to the extension distance thereof in the third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the second direction is also the extension direction of the main body of the heat exchange tube (31).

2. A heat exchange structure (30) according to claim 1, characterized in that: An air collecting chamber and an air outlet chamber are also provided at both ends of the heat exchange structure (30), and the air collecting chamber and the air outlet chamber both extend in a third direction and are connected to each heat exchange tube (31) and the sealed chamber (01).

3. A heat exchange structure (30) according to claim 2, characterized in that: The number of the heat exchange tube groups is multiple, and each group of heat exchange tubes is arranged in layers along the third direction, and the projection surface of the entire heat exchange structure (30) in the second direction extends along the first direction for a distance greater than or equal to the extension distance along the third direction.

4. A heat exchange structure (30) according to claim 2 or 3, characterized in that: The fins (32) are arranged outside each heat exchange tube (31) and connect each heat exchange tube (31) as a whole; each heat exchange tube (31) passes through each fin (32) along the second direction; and an air passage parallel to the first direction is formed between each heat exchange tube (31).

5. An inverter, characterized in that: include A shell (10) is provided with a mounting plate (11) parallel to a first direction, the mounting plate (11) divides the shell (10) into a heat dissipation chamber (02) and a closed chamber (01), a first air outlet (111) and a second air outlet (112) opened along a third direction are arranged on the mounting plate (11) at intervals along a second direction, the heat dissipation chamber (02) is provided with an air inlet (12) opened along the first direction and an air outlet (13) connected to the air inlet (12) to form a wind flow flowing along the first direction; A heating component (20) is placed in the sealed chamber (01); A heat exchange structure (30) as claimed in any one of claims 1 to 4 and disposed in a heat dissipation cavity (02), wherein the heat exchange tube (31) is connected to the first air port (111) and the second air port (112); the heat exchange tube (31) is at least partially opposite to the mounting plate (11) so that a gap is formed between the fin (32) located on the portion of the heat exchange tube (31) and the outer surface of the mounting plate (11); A heat sink (40) is disposed in the heat dissipation cavity (02) and is used to dissipate heat for at least a portion of the heat generating component (20), and is provided with heat dissipation fins at least partially located in the interval between the mounting plate (11) and the fins (32), and each heat dissipation fin is arranged at intervals along the second direction and is perpendicular to the second direction; and A heat dissipation fan (50) is disposed in the heat dissipation cavity (02) and is adapted to drive air to flow from the air inlet (12) to the air outlet (13) through the heat exchange tube (31) and the heat dissipation fins simultaneously.

6. An inverter as claimed in claim 5, characterized in that: It also includes an air duct mounting plate (60), one end of which extends to the air outlet (13), and the other end of which extends to the side of the heat exchange tube (31) away from the air inlet (12), so as to form a first air flow area (03) and a second air flow area (04) separated from each other on the air outlet side of the heat exchange structure (30); the radiator (40) is also at least partially located in the second air flow area (04); the heat dissipation fin located between the heat exchange tube (31) and the mounting plate (11) is defined as a first heat dissipation fin (42), and the heat dissipation fin located in the second air flow area (04) is defined as a second heat dissipation fin (43); a wind gap extending in a first direction is formed between the air duct mounting plate (60) and the free end of the second heat dissipation fin (43); The heat dissipation fan (50) is suitable for driving wind from the air inlet (12) to pass through the heat exchange tube (31) and the first air flow area (03) in sequence to flow to the air outlet (13), and is also suitable for driving wind from the air inlet (12) to pass through the gaps of the first heat dissipation fins (42) and the gaps of the second heat dissipation fins (43) in sequence to flow to the air outlet (13).

7. An inverter as claimed in claim 6, characterized in that: Along the direction away from the mounting plate (11), the height of the second heat dissipation fin (43) is greater than the height of the first heat dissipation fin (42); the air outlet (13) is opened along the third direction and away from the air inlet (12); the air duct mounting plate (60) is provided with an air guide groove (61) extending along the first direction and facing away from the mounting plate (11); one end of the air guide groove (61) is connected to the end of the heat exchange tube (31) close to the mounting plate (11), and the other end is opposite to the air outlet (13) and is provided with an air guide plate (62) inclined toward the air outlet (13); the air guide groove (61), the air guide plate (62) and the cavity wall of the heat dissipation cavity (02) close to the groove of the air guide groove (61) cooperate to form the first wind flow area (03); a wind gap extending along the first direction is formed between the outer surface of the groove bottom wall of the air guide groove (61) and the free end of the second heat dissipation fin (43).

8. An inverter as claimed in claim 7, characterized in that: The device also includes an electrical component (70) to be cooled and disposed in the cooling cavity (02); the air duct mounting plate (60) is also provided with a first side plate (63) and a second side plate (64) on both sides of each second cooling tooth plate (43) along the second direction; the first side plate (63) and the second side plate (64) are respectively connected to the mounting plate (11) and the air guide groove (61) at both ends along the third direction; the first side plate (63) and the second side plate (64) are respectively connected to the air guide groove (61) ) are arranged such that the two side walls of the groove cooperate to form a first wind baffle and a second wind baffle; a wind-passing zone (06) separated from both the first wind flow zone (03) and the second wind flow zone (04) is formed between the first wind baffle and / or the second wind baffle and the cavity wall of the heat dissipation cavity (02); the electrical component (70) to be cooled is at least partially located in the wind-passing zone (06), and the heat dissipation fan (50) is further suitable for driving the air flow from the air inlet (12) through the wind-passing zone (06) to the air outlet (13).

9. An inverter as claimed in claim 8, characterized in that: An air outlet (353) and an air collecting portion (352) connected to the closed cavity (01) are disposed at opposite ends of the heat exchange structure (30); the second air baffle is located on the inner side of the air outlet (353) and forms the air passing area (06) with the cavity wall of the heat dissipation cavity (02); an air outlet area (05) connected to the air passing area (06) is formed between the air outlet (353) and the corresponding side wall of the shell (10); and the electrical component (70) to be dissipated heat is also at least partially located in the air outlet area (05).

10. An inverter as claimed in claim 9, characterized in that: There are a plurality of heat dissipation fans (50), each of which is arranged along the second direction on the air inlet side of the heat exchange structure (30) and the radiator (40) and is an exhaust fan; the electrical component (70) to be cooled comprises a boost inductor (71) and an inverter inductor (72); the boost inductor (71) is arranged at intervals along the second direction on the air inlet side of the heat dissipation fan (50); the inverter inductor (72) is located on the air outlet side of the heat dissipation fan (50), wherein part of the inverter inductor (72) is vertically placed in the air outlet area (05), and part of the inverter inductor (72) is horizontally placed in the air flow area (06).

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