CN117858449A - Heat exchange structure and inverter - Google Patents

Abstract

The invention discloses a heat exchange structure and an inverter, wherein the heat exchange structure is used for radiating heat of a closed cavity, the closed cavity is provided with a mounting plate parallel to a first direction, the heat exchange structure protrudes out of the mounting plate and is provided with a plurality of heat exchange pipes communicated with the closed cavity at intervals along the wind passing direction, and the heat exchange structure is also provided with a plurality of fins which are arranged outside the heat exchange pipes at intervals along the extending direction of the heat exchange pipes so as to connect the heat exchange pipes into a whole; an air passage is formed between the fins to take away the heat of each heat exchange tube. The inverter adopts the heat exchange structure. This application stable in structure and radiating efficiency are high.

Description

A heat exchange structure and inverter

Technical Field

The present invention relates to the field of heat dissipation, and in particular to a heat exchange structure and an inverter.

Background technique

As the power of inverters increases, their integration becomes higher. The losses of power devices, magnetic devices, fuses, switches, capacitors and other devices in the inverter chassis further increase, and the heat flux density also increases. Since heat-sensitive devices such as electrolytic capacitors are arranged inside the chassis, the temperature rise inside the chassis directly determines the performance of these devices. At present, the inverter chassis mainly relies on the natural heat dissipation of the chassis wall to the outside. However, the heat dissipation capacity of this heat dissipation method is relatively limited, resulting in the inability to effectively cool down the inside of the chassis, thereby affecting the life and reliability of internal components, and then affecting the overall service life of the inverter.

In the prior art, an air heat exchanger is used to dissipate heat for components inside a chassis. Such an air heat exchanger generally includes two relatively arranged air collecting chambers and a tubular channel connecting the two air collecting chambers. The two air collecting chambers are connected to the interior of the chassis so that the heat inside the chassis can be dissipated through the heat exchanger. In order to improve the heat dissipation efficiency, the tubular channels are often stacked in multiple layers along the height direction of the air collecting chambers, and heat dissipation fins are provided between adjacent layers of the tubular channels. During transportation or after a period of use, the middle portion of the tubular channel is prone to collapse, especially the tubular channel at the bottom layer, which is likely to break after a long period of collapse, thereby affecting the heat dissipation efficiency.

Summary of the invention

The object of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a heat exchange structure and an inverter, which have a stable structure and high heat dissipation efficiency.

To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

Technical solution 1, a heat exchange structure 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 protrudes from the mounting plate and is provided with a plurality of heat exchange tubes connected to the closed cavity at intervals along a wind direction parallel to the first direction, the heat exchange structure is also provided with a plurality of heat exchange tubes arranged at intervals along an extension direction of the heat exchange tubes so as to connect the heat exchange tubes as a whole, and air ducts are formed between the fins to take away the heat of the heat exchange tubes.

Based on Technical Solution One, Technical Solution Two is also provided. In Technical Solution Two, air collecting cavities and air outlet cavities are provided at both ends of the heat exchange structure. Both the air collecting cavities and the air outlet cavities extend in a direction perpendicular to the mounting plate and connect the heat exchange tubes and the closed cavity.

Based on Technical Solution One, Technical Solution Three is also provided. In Technical Solution Three, both ends of each heat exchange tube are bent inward to form an air collecting portion and an air outlet portion connected to the closed cavity, and the middle part of the heat exchange tube forms a connecting portion which is arranged between the air collecting portion and the air outlet portion and is opposite to the outer surface of the mounting plate; each fin is arranged outside each heat exchange tube of the air collecting portion, the air outlet portion and the connecting portion.

Based on technical solution two or three, technical solution four is also provided. In technical solution four, each heat exchange tube passes through each fin along its extension direction, each heat exchange tube includes a plurality of connecting tubes arranged at intervals along its thickness direction, and each fin is also surrounded by each connecting tube; an air passage parallel to the first direction is formed between adjacent connecting tubes of each heat exchange tube.

Technical solution five, the present invention also provides an inverter, including a shell, a mounting plate parallel to the first direction is provided therein, the mounting plate divides the shell into a heat dissipation cavity and a closed cavity, a first air outlet and a second air outlet opened along a third direction are arranged on the mounting plate 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 connected to the air inlet to form a wind flow flowing along the first direction; the first direction, the second direction and the third direction are orthogonal to each other; a heat generating component is placed in the closed cavity; a heat exchange structure is as described in any one of technical solutions one to four and placed in the heat dissipation cavity, the heat exchange tube connecting the first air outlet and the second air outlet, the heat exchange tube at least partially opposite to the mounting plate so that a gap is formed between the fins on the portion 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 to dissipate heat for at least part of the heat-generating component, and is provided with heat dissipation fins which are at least partially located in the gap between the mounting plate and the fins, and each heat dissipation fin is arranged at intervals along the second direction and perpendicular to the second direction; and a heat dissipation fan, which is placed in the heat dissipation cavity and is suitable for driving wind to flow from the air inlet to the air outlet synchronously through the heat exchange tube and the heat dissipation fins.

Based on Technical Solution Five, Technical Solution Six is also provided. Technical Solution Six also includes a duct mounting plate, one end of the 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 airflow area and a second airflow area separated from each other on the air outlet side of the heat exchange structure; the radiator is also at least partially located in the second airflow area; the heat dissipation fins located between the heat exchange tube and the mounting plate are defined as first heat dissipation fins, and the heat dissipation fins located in the second airflow area are defined as second heat dissipation fins; a wind gap extending in a first direction is formed between the duct mounting plate and the free end of the second heat dissipation fin; the heat dissipation fan is suitable for driving wind from the air inlet through the heat exchange tube and the first airflow area to flow to the air outlet in sequence, and is also suitable for driving wind from the air inlet through the gaps between the first heat dissipation fins and the gaps between the second heat dissipation fins to flow to the air outlet in sequence.

Based on technical solution six, technical solution seven is also provided. In technical solution seven, along the direction away from the mounting plate, the height of the second heat dissipation fin is greater than the height of the first heat dissipation fin; the air outlet is opened along the third direction and away from the air inlet; the air duct mounting plate is provided with an air guide groove extending along the first direction and facing away from the mounting plate; one end of the air guide 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 an air guide plate inclined toward the air outlet; the air guide groove, the air guide plate and the cavity wall of the heat dissipation cavity close to the groove of the air guide groove cooperate to form the first wind flow area; a wind gap extending along the first direction is formed between the outer surface of the bottom wall of the air guide groove and the free end of the second heat dissipation fin.

Based on Technical Solution Seven, Technical Solution Eight is also provided, and Technical Solution Eight also includes electrical components to be cooled 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 tooth plate along the second direction; the first side plate and the second side plate are respectively connected to the mounting plate and the air guide groove at both ends along the third direction, and the first side plate and the second side plate are respectively cooperated with the two groove side walls of the air guide groove to form a first wind baffle plate and a second wind baffle plate; a wind-passing zone separated from the first wind flow zone and the second wind flow zone is formed between the first wind baffle plate and/or the second wind baffle plate and the cavity wall of the heat dissipation cavity; the electrical components to be cooled are at least partially located in the wind-passing zone, and the heat dissipation fan is also suitable for driving the airflow from the air inlet through the wind-passing zone to the air outlet.

Based on Technical Solution Eight, Technical Solution Nine is also provided. In Technical Solution Nine, an air outlet and an air collecting part connected to the closed cavity are relatively provided at both ends of the heat exchange structure; the second air baffle is located on the inner side of the air outlet and forms the air passing area with the cavity wall of the heat dissipation cavity, and an air outlet area connected to the air passing area is formed between the air outlet and the corresponding side wall of the shell; the electrical components to be dissipated heat are also at least partially located in the air outlet area.

Based on Technical Solution Nine, Technical Solution Ten is also provided. In Technical Solution Ten, there are multiple heat dissipation fans, each of which is arranged along the second direction on the air inlet side of the heat exchange structure and the radiator and is an exhaust fan; the electrical components to be dissipated heat include boost inductors and inverter inductors; the boost inductors are arranged at intervals along the second direction on the air inlet side of the heat dissipation fan; the inverter inductors are located on the air outlet side of the heat dissipation fan, wherein some inverter inductors are placed vertically in the air outlet area, and some inverter inductors are placed horizontally in the air flow area.

From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

The applicant has learned through continuous observation, experimentation and research that the reason why the technical problem of "tubular channels are prone to collapse and have low heat exchange efficiency" occurs in the prior art solution is that each layer of tubular channels has a relatively large area, the strength of the middle part is relatively weak, and heat dissipation fins are provided between adjacent tubular channels. The tubular channels will bear the weight of the heat dissipation fins, especially the bottom tubular channel will bear the heat of the upper heat dissipation fins and the heat of the tubular channels transmitted through the heat dissipation fins. Therefore, the middle part of the tubular channel is prone to collapse or even break due to collapse.

In the technical solution 1, the heat exchange structure includes a plurality of heat exchange tubes arranged along the wind direction. Compared with the structure of a whole heat exchange tube, the surface area of each heat exchange tube in this solution is relatively reduced, so each heat exchange tube can be configured with greater strength. At the same time, the heat exchange structure is provided with a plurality of fins arranged around each heat exchange tube at intervals along the extension direction of the heat exchange tube to connect each heat exchange tube as a whole. Therefore, each fin can also form multi-point support and reinforcement for each heat exchange tube in the length direction, width direction and height direction of the heat exchange tube, especially in the length direction, thereby effectively preventing the middle part of the heat exchange tube from collapsing and breaking, and improving the stability of the heat exchange structure. More preferably, each fin can also conduct heat between each heat exchange tube, so that each heat exchange tube has a uniform temperature effect. This advantage is more prominent when there are a large number of heat exchange tubes along the wind direction, thereby improving the uniformity of each heat exchange tube and avoiding local overheating. In addition, an air duct is formed between each fin, and the wind flow can quickly take away the heat on the surface of the heat exchange tube when passing through the air duct, especially the surface opposite to the mounting plate and the surface away from the mounting plate. The heat dissipation efficiency is high, and the wind flow flows along the first direction to realize the flow diversion function. The heat of the heat exchange tube located downstream of the wind flow can also be quickly taken away, further improving the heat dissipation efficiency. When this heat exchange structure is used to dissipate heat for a closed cavity, it can ensure long-term and stable heat dissipation for the closed cavity. Among them, the heat exchange tube can be a straight rigid tube or a curved rigid tube; when the heat exchange tube is a straight rigid tube, the extension direction of the heat exchange tube is the length direction of the heat exchange tube; when the heat exchange tube is a curved rigid tube, the heat exchange tube is composed of multiple heat exchange sections, and the extension direction of the heat exchange tube corresponds to the length direction of each heat exchange section.

In the second technical solution, each heat exchange tube collects hot air from the air collecting chamber, and discharges cold air into the air outlet chamber after heat exchange. In this way, the hot air and the cold air are gathered together, the air volume is large, and the heat dissipation efficiency is high.

In technical solution three, both ends of each heat exchange tube are bent inward to form an air collecting part and an air outlet part connected to the closed cavity. The processing is convenient, and the airflows in each heat exchange tube are directly blown into the closed cavity without interfering with each other, and directly enter the heat exchange tube from the closed cavity; each fin is arranged outside the heat exchange tube of the air collecting part, the air outlet part and the connecting part, so that each part of the heat exchange tube has good temperature uniformity and support and reinforcement effect.

In technical solution four, each heat exchange tube passes through each fin along its extension direction, which is easy to process and means that the fin is perpendicular to the extension direction of the heat exchange tube, so that an air duct extending along the first direction is formed between adjacent fins, and the airflow flows smoothly; each heat exchange tube includes a plurality of connecting tubes arranged along its thickness direction, and an air passage parallel to the first direction is formed between adjacent connecting tubes. On the one hand, the heat exchange tube is formed by a plurality of connecting tubes, so that the strength of the heat exchange tube in the thickness direction is also enhanced. On the other hand, heat concentration in the thickness direction of the heat exchange tube is avoided, and the airflow can take away the heat on the surface of the connecting tube through the air passage, thereby improving the heat dissipation efficiency; each fin is also arranged outside each connecting tube, so that the fin can conduct heat and flow between each connecting tube, thereby improving the temperature uniformity, and also realizing multi-point support in the thickness direction, thereby further increasing the strength of the heat exchange tube. It should be understood that the thickness direction of the heat exchange tube refers to the direction perpendicular to the length direction and width direction of the heat exchange tube; when the heat exchange tube is a straight heat exchange tube in Technical Solution 2, the thickness direction of the heat exchange tube is mainly perpendicular to the mounting plate; when the heat exchange tube is a curved heat exchange tube in Technical Solution 3, the thickness direction of the heat exchange tube corresponds to the thickness direction of each of the heat exchange tubes in the air collecting part, the air outlet part and the connecting part.

Technical solution 6 has the technical effect of any one of technical solutions 1 to 5, wherein the heat generating component dissipates heat through the heat exchange structure and the radiator, thus ensuring the protection of the heat generating component and making the whole inverter have a higher heat dissipation efficiency; wherein, at least part of the heat exchange tube is opposite to the mounting plate so that a gap is formed between the fins on the part of the heat exchange tube and the outer surface of the mounting plate, allowing the heat dissipation fins for heat dissipation of the closed cavity to extend, so that 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, the layout is ingenious, the space utilization rate is high, and the heat dissipation fins and the heat exchange tube are parallel air ducts, 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, and after the heat exchange structure is placed in the heat dissipation cavity, the airflow is relatively smooth when flowing through the heat exchange structure and the heat dissipation fins.

In technical solution six, the provision of the air duct mounting plate prevents the second heat dissipation fin located on the air outlet side of the heat exchange structure from being affected by the heat of the heat exchange tube, so that the second heat dissipation fin has a higher heat dissipation efficiency. In addition, a wind gap extending along the first direction is formed between the air duct mounting plate and the free end of the second heat dissipation fin, ensuring timely heat dissipation of the free end of the second heat dissipation fin, thereby improving the overall heat dissipation efficiency of the second heat dissipation fin.

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 faces 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.

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.

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.

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, and the heat of the heat exchange structure, radiator and inverter inductor can be taken away simultaneously. 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

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.

FIG1 is a schematic diagram of an inverter according to Embodiment 1 of the present invention;

FIG2 is a cross-sectional view of the inverter along the second direction according to Embodiment 1 of the present invention;

FIG3 is a cross-sectional view of the inverter according to Embodiment 1 of the present invention along a third direction;

FIG4 is a schematic diagram of a heat exchange structure according to Example 1 of the present invention;

FIG5 is a schematic diagram of a hidden top wall of an inverter according to Embodiment 1 of the present invention;

FIG6 is a top view of the hidden top wall of the inverter according to Embodiment 1 of the present invention;

FIG7 is a schematic diagram of an air duct mounting plate according to Embodiment 1 of the present invention;

FIG8 is a schematic diagram of a heat exchange structure according to Embodiment 2 of the present invention;

FIG. 9 is a schematic diagram of a heat exchange structure of Example 3 of the present invention

FIG. 10 is a schematic diagram of a heat exchange structure of Example 4 of the present invention

Description of main reference numerals:

Shell 10; mounting plate 11; first air outlet 111; second air outlet 112; air inlet 12; air outlet 13; top wall 14; closed cavity 01; heat dissipation cavity 02; heating component 20; heat exchange structure 30; heat exchange tube 31; connecting tube 311; fin 32; air collecting box 33; air outlet box 34; connecting part 351; air collecting part 352; air outlet part 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 guide groove 61; air guide plate 62; first side plate 63; second side plate 64; first air flow area 03; second air flow area 04; air outlet area 05; air passing area 06; electrical component to be dissipated 70; boost inductor 71; inverter inductor 72; baffle 80.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

In the claims, specifications and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are 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 direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

In the present invention, the heat exchange tube can be a straight rigid tube or a curved rigid tube; when the heat exchange tube is a straight rigid tube, the extension direction of the heat exchange tube is the length direction of the heat exchange tube; when the heat exchange tube is a curved rigid tube, the heat exchange tube is composed of a plurality of heat exchange sections, and the extension direction of the heat exchange tube corresponds to the length direction of each heat exchange section. The thickness direction of the heat exchange tube refers to the direction perpendicular to the length direction and the width direction of the heat exchange tube.

In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

Example 1

1-7 , which show an inverter, including a housing 10 , a heat generating component 20 , a heat exchange structure 30 , a radiator 40 , a heat dissipation fan 50 , an air duct mounting plate 60 , and electrical components 70 to be cooled.

Referring to FIG1 , the housing 10 is roughly in the shape of a cuboid, and has four end-to-end connected side walls, 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, and the third direction is the height direction of the housing 10. The first direction, the second direction, and the third direction are orthogonal to each other. Referring to FIG2 , a mounting plate 11 parallel to the first direction is provided in the housing 10, and the mounting plate 11 extends from one end to the other end of the housing 10 along the second direction to separate the housing 10 into a heat dissipation cavity 02 and a closed cavity 01 arranged along the third direction. The mounting plate 11 is provided with a first air vent 111 and a second air vent 112 opened along the third direction at intervals along the second direction. Still referring to FIG1 , the heat dissipation cavity 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. In FIG1 , the air inlet 12 is opened on the front side wall of the housing 10 along the first direction, and the air outlet 13 is opened on the top wall 14 of the housing 10 along the third direction and away from the air inlet 12, so that the heat dissipation cavity 02 has a ventilation function. Relatively speaking, the closed cavity 01 is a closed cavity, and the air circulation in the closed cavity 01 is all internal circulation. In this way, the components with relatively high requirements for waterproof, dustproof or corrosion-resistant performance in the inverter can be arranged in the closed cavity 01, while the components without such protection requirements or with relatively low protection requirements can be arranged in the heat dissipation cavity 02. The first air outlet 111 and the second air outlet 112 connect the closed cavity 01 and the heat dissipation cavity 02, so that the heat in the closed cavity 01 can be naturally dissipated to the outside through the wall of the housing 10, and can also be dissipated through the heat dissipation cavity 02 to achieve effective cooling. In this embodiment, the air inlet 12 and the air outlet 13 are both rectangular.

In a specific implementation, a rectangular through hole is also provided on the mounting plate 11, and the heat dissipation substrate 41 of the heat sink 40 for dissipating heat in the closed cavity 01 can block the rectangular through hole. The first air vent 111 and the second air vent 112 are respectively located on both sides of the rectangular through hole along the second direction.

The heating component 20 is placed in the closed cavity 01. In some embodiments, the heating component 20 is a power component such as a capacitor or an IGBT, which has high requirements for protection. Devices with 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 fan is also provided in the closed cavity 01, so that the heat flow of the closed cavity 01 can flow into the heat dissipation cavity 02 through one of the first air outlet 111 and the second air outlet 112, and then recover the cooled airflow through the other. In practical applications, the heating component 20 can be arranged according to its heat dissipation priority to ensure the heat dissipation efficiency of each electrical component of the heating component 20. The layout of the electrical components in the closed cavity 01 does not belong to the improved part of this application and will not be described in detail here.

The heat exchange structure 30 is used to dissipate heat for the closed cavity 01. It is placed in the heat dissipation cavity 02. It protrudes from the mounting plate 11 and is provided with a plurality of heat exchange tubes 31 connected to the closed cavity 01 at intervals along the wind direction parallel to the first direction. The two ends of the heat exchange tube 31 are respectively connected to the first air outlet 111 and the second air outlet 112. The heat exchange structure 30 is also provided with a plurality of fins 32 arranged around each heat exchange tube 31 at intervals along the extension direction of the heat exchange tube 31 to connect each heat exchange tube 31 as a whole. An air duct is formed between each fin 32 to take away the heat of each heat exchange tube 31. The heat exchange tube 31 is at least partially opposite to the mounting plate 11 so that a gap is formed between the fins 32 located on the portion of the heat exchange tube 31 and the outer surface of the mounting plate 11 to allow the heat dissipation fins for dissipating heat for the closed cavity 01 to extend.

In this embodiment, an air collecting chamber and an air outlet chamber are further provided at both ends of the heat exchange structure 30. Both the air collecting chamber and the air outlet chamber extend in a direction perpendicular to the mounting plate 11 and connect each heat exchange tube 31 and the closed chamber 01. That is to say, the heat exchange tube 31 is not directly connected to the closed chamber 01, but is connected to the closed chamber 01 through the air collecting chamber and the air outlet chamber. Specifically, an air collecting box 33 and an air outlet box 34 are respectively provided at both ends of the heat exchange structure 30. The sides of the air collecting box 33 and the air outlet box 34 opposite to each other are provided with openings corresponding to each heat exchange tube 31. Each heat exchange tube 31 can be sealed and 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 are formed with flange structures to be sealed and fixed with the mounting plate 11. The inner cavities of the air collecting box 33 and the air outlet box 34 form an air collecting chamber and an air outlet chamber respectively. The arrangement of the air collecting box 33 and the air outlet box 34 can also provide support for each heat exchange tube 31.

Referring to FIG3 , each heat exchange tube 31 includes a plurality of connecting tubes 311 arranged at intervals along the thickness direction thereof (the third direction in FIG3 ), and each fin 32 is also arranged outside each connecting tube 311, and each connecting tube 311 penetrates each fin 32 along the second direction; wherein, the cross section of the connecting tube 311 is flat, and an air passage parallel to the first direction is formed between adjacent connecting tubes 311 in each heat exchange tube 31, and in FIG3 , each air passage includes three connecting tubes 311. 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 tube 31 forms the connecting part connecting the air collecting part and the air outlet part of the heat exchange structure 30.

Referring to FIG. 2 and FIG. 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 component 20. The heat sink 40 includes a heat dissipation substrate 41 and a plurality of heat dissipation fins protruding from the heat dissipation substrate 41. The heat dissipation fins are arranged at intervals along the second direction and perpendicular to the second direction. A heat dissipation channel extending along the first direction is formed between the heat dissipation fins. As described above, the heat dissipation substrate 41 blocks the rectangular through hole of the mounting plate 11. Part of the heat generating component 20 is attached to the heat dissipation substrate 41 so as to transfer heat to the heat dissipation substrate 41. 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 rectangular through holes, and the heat dissipation substrate 41 may be directly mounted on the mounting plate 11. The heat of the heat generating component 20 may be transferred to the heat dissipation substrate 41 through the mounting plate 11.

In this embodiment, the radiator 40 is provided with heat dissipation fins at least partially located in the interval between the mounting plate 11 and the fins 32. That is, the projections of the heat exchange structure 30 and the radiator 40 along the third direction partially overlap. The heat dissipation fan 50 is placed in the heat dissipation cavity 02 and is suitable for driving the wind from the air inlet 12 to flow to the air outlet 13 synchronously through the heat exchange tube 31 and the heat dissipation fins.

Referring to FIG. 1 and FIG. 4 , the air inlet of the heat dissipation fan 50 is arranged toward the air inlet 12 , and the air outlet 13 of the heat dissipation fan 50 is arranged toward the heat exchange structure 30 and the radiator 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 in the interval between the heat dissipation fins and the fins 32 , so that 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 tube 31 , but does not cover part of the air collecting box 33 and the air outlet box 34 .

In this embodiment, the projected area of the radiator 40 along the third direction is larger than the projected area of the heat exchange structure 30 along the third direction, that is, on the air outlet side of the heat exchange structure 30, the radiator 40 is still provided with heat dissipation fins. In FIG4 , the heat dissipation fins of the radiator 40 extend to the rear side wall (left side in FIG4 ) of the housing 10. In 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 bottommost connecting tube 311; the radiator 40 is also at least partially located in the second air flow area 04.

The heat dissipation fins located between the heat exchange tube 31 and the mounting plate 11 are defined as first heat dissipation fins 42, and the heat dissipation fins located in the second air flow area 04 are defined as second heat dissipation fins 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 the 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, and is also suitable for driving the 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 to flow to the air outlet 13. The setting of the air duct mounting plate 60 prevents the second heat dissipation fins 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 dissipation fins 43 have 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 dissipation fin 43, which ensures timely heat dissipation of the free end of the second heat dissipation fin 43, thereby improving the heat dissipation efficiency of the second heat dissipation fin 43 as a whole.

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.

Referring to Fig. 5-6, the air duct mounting plate 60 is provided with an air guide groove 61 extending in the first direction and facing away from the mounting plate 11, and the notch of the air guide groove 61 faces the top wall 14 of the housing 10; 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 notch of the air guide groove 61 cooperate to form a first air flow area 03; 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 form a wind gap extending in the first direction. The structural setting of the air duct mounting plate 60 makes the air outlet of the heat exchange tube 31 smooth, thereby ensuring that the heat exchange structure 30 has a high heat dissipation efficiency.

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 heat dissipation tooth plate 43 along the second direction; the first side plate 63 and the second side plate 64 are connected to the mounting plate 11 and the air guide groove 61 at both ends along the third direction respectively, and the first side plate 63 and the second side plate 64 respectively cooperate with the two groove side walls of the air guide groove 61 to form a first air baffle and a second air baffle; a wind passing area 06 separated from the first air flow area 03 and the second air flow area 04 is formed between the first air baffle and/or the second air baffle and the cavity wall of the heat dissipation cavity 02; in Figure 6, the first air baffle and the second air baffle are respectively located on the left and right sides, and the upstream ends (front ends) of the first air baffle and the second air baffle are respectively connected to the opposite side walls (i.e., inner walls) of the air collecting box 33 and the air outlet box 34, and the downstream ends (rear ends) of the first air baffle and the second air baffle extend to the lower end of the air outlet 13, but do not extend to the rear side wall of the shell 10. The second air baffle is located inside the air outlet 353 and forms a wind passing area 06 with the cavity wall of the heat dissipation cavity 02. The distance between the second air baffle and the corresponding side wall of the housing 10 is greater than the distance between the air outlet 353 and the corresponding side wall of the housing 10. A wind passing area 05 connected to the wind passing area 06 is formed between the air outlet 353 and the corresponding side wall of the housing 10. The wind passing area 05 and the wind passing area 06 form a series air duct, and the wind passing area 05 is located upstream of the wind passing area 06.

The electrical component 70 to be cooled is at least partially located in the wind passing zone 06 and at least partially located in the wind passing zone 05. The cooling fan 50 is also suitable for driving the airflow from the air inlet 12 through the wind passing zone 05 and the wind passing zone 06 to the air outlet 13. The structural arrangement of the air duct mounting plate 60 is capable of forming the first wind flow zone 03, the second wind flow zone 04, and the wind passing zone 05 and the wind passing zone 06 separated from the first wind flow zone 03 and the second wind flow zone 04. The wind ducts of the first wind flow zone 03, the second wind flow zone 04 and the wind passing zone 05 are connected in parallel, and the wind ducts of the first wind flow zone 03, the second wind flow zone 04 and the wind passing zone 06 are connected in parallel without interfering with each other. The electrical component 70 to be cooled, which has relatively low protection requirements, is placed in the wind passing zone 05 and the wind passing zone 06 of the heat dissipation cavity 02 and cools by air cooling. The layout is reasonable and ingenious, the space utilization rate is high, and the temperature uniformity of the heating component 20 and the electrical component 70 to be cooled is effectively improved.

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. In Figures 5 and 7, a total of three inverter inductors 72 are provided, one of which is vertically placed in the air passing area 05, and the other two inverter inductors 72 are horizontally placed in the air passing area 06. One of the cooling fans 50 is directly opposite to the air passing area 05.

Since the boost inductor 71 generates less heat and the inverter inductor 72 generates more heat, the boost inductor 71 with less heat is placed on the air inlet side of the heat dissipation fan 50, and the inverter inductor 72 is placed on the air outlet side of the heat dissipation fan 50. The airflow temperature of the heat dissipation fan 50 passing through the boost inductor 71 is still relatively low, and the heat of the heat exchange structure 30, the radiator 40 and the inverter inductor 72 can be taken away simultaneously. The entire heat dissipation cavity 02 has a good heat dissipation effect, thereby ensuring the stable operation of the entire inverter. The temperature of the air outlet 353 of the heat exchange structure 30 is relatively low, and a wind passing area 05 connected to the wind passing area 06 is formed between the air outlet 353 and the corresponding side wall of the shell 10. Part of the inverter inductor 72 is placed vertically in the wind passing area 05, and part of the inverter inductor 72 is placed horizontally in the wind passing area 06, further improving the space utilization without affecting the heat dissipation efficiency.

In this embodiment, the heat generating component 20 dissipates heat through the heat exchange structure 30 and the radiator 40. Specifically, the airflow after cooling of the heat exchange structure 30 flows into the closed chamber 01 through the second air outlet 112, dissipates heat to the heat generating component 20 in the closed chamber 01, and then is brought into the first air outlet 111 by the turbulent fan in the closed chamber 01 and re-enters the heat exchange tube 31 to complete a cycle; a device with a large heat generation, such as an IGBT, can directly transfer the 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, and the heat dissipation fan 50 brings the heat of the heat dissipation fins and the heat exchange structure 30 into the air outlet 13, thereby ensuring the protection of the heat generating component 20; in this way, the protection of the heat generating component 20 is ensured, and the entire inverter has a higher heat dissipation efficiency; wherein, when the heat dissipation fan 50 dissipates heat for the radiator 40 and the heat exchange structure 30, the air ducts of the radiator 40 and the heat exchange structure 30 are connected 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 outlet 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 airflow flows smoothly through the heat exchange structure 30 and the heat dissipation fins.

The heat exchange structure 30 includes a plurality of heat exchange tubes 31 arranged along the wind direction (first direction). Compared with the structure of a whole heat exchange tube, the surface area of each heat exchange tube 31 in this scheme is relatively reduced, so each heat exchange tube 31 can be configured with greater strength. At the same time, the heat exchange structure 30 is provided with a plurality of fins 32 arranged at intervals along the extension direction of the heat exchange tube 31 and arranged outside each heat exchange tube 31 to connect each heat exchange tube 31 as a whole. Therefore, each fin 32 can also form multi-point support and reinforcement for each heat exchange tube 31 in the length direction, width direction and height direction of the heat exchange tube 31, thereby 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, each fin 32 can also conduct heat between each heat exchange tube 31, so that there is a temperature uniformity effect between each heat exchange tube 31. This advantage is more prominent when the number of heat exchange tubes 31 along the wind direction is large, thereby improving the temperature uniformity of each heat exchange tube 31 and avoiding local overheating. In addition, an air duct is formed between adjacent fins 32. When the wind flows through the air duct, it can quickly take away the heat from the surface of the heat exchange tube 31, especially the surface opposite to the mounting plate 11 and the surface away from the mounting plate 11, which has high heat dissipation efficiency and makes the wind flow along the first direction to realize the flow diversion function. The heat of the heat exchange tube 31 located downstream of the wind flow can also be quickly taken away, further improving the heat dissipation efficiency. Each heat exchange tube 31 passes through each fin 32 along its extension direction, which is easy to process, and means that the fin 32 is perpendicular to the extension direction of the heat exchange tube 31. Thus, an air passage extending along the first direction is formed between adjacent fins 32, and the airflow flows smoothly; each heat exchange tube 31 includes a plurality of connecting tubes 311 arranged along its thickness direction, and the connecting tubes 311 are flat, and an air passage parallel to the first direction is formed between adjacent connecting tubes 311. On the one hand, the heat exchange tube 31 is formed by a plurality of connecting tubes 311, so that the strength of the heat exchange tube 31 in the thickness direction is also enhanced, and on the other hand, the heat concentration in the thickness direction of the heat exchange tube 31 is avoided, and the airflow can take away the heat on the surface of the connecting tube 311 through the air passage, thereby improving the heat dissipation efficiency; each fin 32 is also arranged outside each connecting tube 311, so that the fin 32 can conduct heat and flow between each connecting tube 311, thereby improving the temperature uniformity, and also realizing multi-point support in the thickness direction, further increasing the strength of the heat exchange tube 31. When this heat exchange structure 30 is used to dissipate heat for the closed cavity 01, it can ensure long-term and stable heat dissipation for the closed cavity 01.

Among them, the heat exchange tube 31 is opposite to the mounting plate 11 so that a gap is formed between the fins 32 located on the heat exchange tube 31 and the outer surface of the mounting plate 11, so as to allow the heat dissipation fins for dissipating heat for the closed cavity 01 to extend, so that the gap 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 and the space utilization rate is high. The heat dissipation fins and the heat exchange tube 31 are parallel air ducts, so that the heat dissipation of the heat dissipation fins and the heat exchange tube 31 do not interfere with each other, and the heat dissipation efficiency is high.

In one application scenario, the inverter is a wall-mounted inverter, the top wall 14 of the shell 10 faces the wall, the air inlet 12 is located at the lower end of the shell 10, and the air outlet 13 is located at the upper end of the shell 10 and opposite to the wall. The top wall 14 of the shell 10 is also protruding with a 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 the side wall opposite to the air inlet 12, it can prevent rain or debris from entering the heat dissipation cavity 02 through the air outlet 13, thereby effectively improving the protectiveness of the heat dissipation cavity 02, thereby ensuring the stable operation of the inverter.

Example 2

Embodiment 2 is basically the same as Embodiment 1, except that, referring to FIG8 , the cross section of the heat exchange tube 31 is cylindrical. The cylindrical heat exchange tube 31 is convenient for processing and further reduces the surface area of the heat exchange tube 31, thereby preventing the middle portion of the heat exchange tube 31 from collapsing, deforming or even breaking when the length of the heat exchange tube 31 is long.

Example 3

Embodiment 3 is basically the same as Embodiment 1, except that, referring to FIG. 9 , the heat exchange structure 30 does not include an air collecting cavity and an air outlet cavity, and the two ends of each heat exchange tube 31 are respectively bent inward to form an air collecting portion 352 and an air outlet portion 353 connected to the closed cavity 01, and the middle part of the heat exchange tube 31 forms a connecting portion 351 which is erected between the air collecting portion 352 and the air outlet portion 353 and is opposite to the outer surface of the mounting plate 11; each fin 32 is arranged outside each heat exchange tube 31 of the air collecting portion 352, the air outlet portion 353 and the connecting portion 351. Each heat exchange tube 31 includes a plurality of connecting tubes 311 arranged at intervals along the thickness direction thereof, and each fin 32 is also arranged outside each connecting tube 311, where the thickness direction of the air collecting portion 352 and the air outlet portion 353 is the second direction, and the thickness direction of the connecting portion 351 is the third direction. In this embodiment, the cross section of the connecting tube 311 is flat, and an air passage parallel to the first direction is formed between adjacent connecting tubes 311 in each heat exchange tube 31. This structure is easy to process, and the wind flows in each heat exchange tube 31 are blown directly into the closed cavity 01 without interfering with each other, and directly enter the heat exchange tube 31 from the closed cavity 01; each fin 32 is arranged outside each heat exchange tube 31 of the air 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 and support and reinforcement. Among them, the bottom of the air collecting part 352 and the air outlet part 353 also forms a flange structure to be sealed and fixed with the mounting plate 11.

Example 4

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

The heat exchange tube 31 is cylindrical, which is convenient for processing and further reduces the surface area of the heat exchange tube 31 , thereby preventing the middle portion of the heat exchange tube 31 from collapsing, deforming or even breaking when the heat exchange tube 31 is long.

The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims (10)

1. A heat exchange structure (30) for dissipating heat for a closed cavity (01), wherein the closed cavity (01) is provided with a mounting plate (11) parallel to a first direction, wherein the heat exchange structure (30) protrudes from the mounting plate (11) and is provided with a plurality of heat exchange tubes (31) communicating with the closed cavity (01) at intervals along a wind direction parallel to the first direction, wherein the heat exchange structure (30) is further provided with a plurality of fins (32) arranged around each heat exchange tube (31) at intervals along an extension direction of the heat exchange tube (31) so as to connect each heat exchange tube (31) as a whole, and an air duct is formed between each fin (32) so as to take away the heat of each heat exchange tube (31). 2. A heat exchange structure (30) as described in claim 1, characterized in that an air collecting chamber and an air outlet chamber are further provided at both ends of the heat exchange structure (30), and the air collecting chamber and the air outlet chamber both extend in a direction perpendicular to the mounting plate (11) and connect each heat exchange tube (31) and the closed chamber (01). 3. A heat exchange structure (30) as described in claim 1, characterized in that both ends of each heat exchange tube (31) are bent inward to form an air collecting portion (352) and an air outlet portion (353) connected to the closed cavity (01), and the middle part of the heat exchange tube (31) forms a connecting portion (351) which is arranged between the air collecting portion (352) and the air outlet portion (353) and is opposite to the outer surface of the mounting plate (11); each fin (32) is arranged outside each heat exchange tube (31) of the air collecting portion (352), the air outlet portion (353) and the connecting portion (351). 4. A heat exchange structure (30) as described in claim 2 or 3, characterized in that each heat exchange tube (31) passes through each fin (32) along its extension direction, each heat exchange tube (31) includes a plurality of connecting tubes (311) arranged at intervals along its thickness direction, and each fin (32) is also surrounded by each connecting tube (311); an air passage parallel to the first direction is formed between adjacent connecting tubes (311) of each heat exchange tube (31). 5. An inverter, characterized in that it comprises 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; The first direction, the second direction and the third direction are orthogonal to each other; 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) disposed in the heat dissipation cavity (02) and used to dissipate heat for at least a portion of the heat generating component (20), the heat sink being provided with heat dissipation fins at least partially located in the interval between the mounting plate (11) and the fins (32), the heat dissipation fins being arranged at intervals along the second direction and being perpendicular to the second direction; and A heat dissipation fan (50) is disposed in the heat dissipation cavity (02) and is suitable for driving wind 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 according to claim 5, characterized in that it also includes an air duct mounting plate (60), 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); 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 flow through the heat exchange tube (31) and the first air flow area (03) to the air outlet (13), and is also suitable for driving wind from the air inlet (12) to flow through the gaps of the first heat dissipation fins (42) and the gaps of the second heat dissipation fins (43) to the air outlet (13). 7. An inverter according to claim 6, characterized in that, in a 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 a 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 a first direction and facing away from the mounting plate (11); one end of the air guide groove (61) is connected to an 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 notch 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 according to claim 7, characterized in that it also includes an electrical component (70) to be cooled placed in the cooling cavity (02); 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 cooling fin (43) along the second direction; the first side plate (63) and the second side plate (64) are connected to the mounting plate (11) and the air guide groove (61) at both ends along the third direction, and the first side plate (63) and the second side plate (64) are connected to the mounting plate (11) and the air guide groove (61) at both ends along the third direction. 4) respectively cooperate with the two side walls of the air guide groove (61) to form a first wind baffle and a second wind baffle; a wind-passing zone (06) separated from 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 also 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 described in claim 8, characterized in that an air outlet (353) and an air collecting portion (352) connected to the closed cavity (01) are provided at two 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 multiple heat dissipation fans (50), each heat dissipation fan (50) 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 passing area (06).