CN223745111U - Heat abstractor and photovoltaic inverter - Google Patents

Abstract

The utility model discloses a heat dissipating device and a photovoltaic inverter, wherein the heat dissipating device comprises a shell, the shell is provided with an air inlet channel and a heating cavity positioned outside the air inlet channel, cold air is suitable for entering the air inlet channel, the heating cavity is internally provided with a heating element, so that the temperature is relatively higher, and cold air is suitable for entering the air inlet channel, so that the temperature in the air inlet channel is lower, the heating cavity can conduct heat to the air inlet channel to take away heat, and further, a heat dissipating mechanism is arranged on the wall surface of the air inlet channel to enable the heating cavity to dissipate heat through the air inlet channel, and the heat dissipation is enhanced through the effect of the heat dissipating mechanism, so that the heat dissipating effect of the heating cavity is better.

Description

Heat abstractor and photovoltaic inverter

Technical Field

The utility model relates to the field of electrical equipment, in particular to a heat dissipation device and a photovoltaic inverter.

Background

In the prior art, the photovoltaic inverter can generally set up the air inlet duct in order to lead wind to different positions in its inside, generally dispel the heat through the heating element in order to photovoltaic inverter inside with entering cold wind from external world in the air inlet duct, because the inside heating element of photovoltaic inverter is more, therefore the outside temperature that also can be higher generally of air inlet duct, the outside of air inlet duct can be to the heat conduction of air inlet duct to carry out auxiliary heat dissipation through the air inlet duct, however, radiating efficiency is low under this mode, the radiating effect is unobvious.

Disclosure of utility model

The utility model aims to overcome the defects or problems in the prior art and provide a heat dissipation device and a photovoltaic inverter.

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

in one aspect, a heat dissipating device includes

The shell is provided with an air inlet duct and a heating cavity positioned outside the air inlet duct, cold air is suitable for entering the air inlet duct, and a heat dissipation mechanism is arranged on the wall surface of the air inlet duct so that the heating cavity dissipates heat through the air inlet duct.

According to the second scheme, based on the first scheme, the heat dissipation mechanism is a radiator, and the radiator is fixed on the air inlet duct.

According to the third scheme, based on the first scheme, the heat dissipation mechanism is a rolling rib, and the rolling rib is arranged in the air inlet duct in a protruding mode so as to increase the inner wall area and the outer wall area of the air inlet duct.

The fourth proposal is based on the first proposal, and further comprises a heating component and a fan component, wherein the shell further comprises a cover body which is communicated with the air inlet duct, the heating cavity is positioned at the outer side of the cover body,

The heating component is arranged in the cover body and comprises a plurality of heating pieces which are sequentially arranged along a first direction;

The fan assembly is arranged in the cover body, the air inlet end or the air outlet end of the fan assembly corresponds to each heating element, and the air inlet end of the fan assembly is communicated with the air inlet duct so as to radiate heat for the heating elements.

The fifth aspect is based on the fourth aspect, wherein the heating component comprises a first heating element, a second heating element and a third heating element which are sequentially arranged along the first direction and have the same specification;

the fan assembly includes a first fan and a second fan,

The first fan is provided with a first end, the first end is an air inlet end or an air outlet end of the first fan, the first end corresponds to the first heating element and the second heating element, and the area of the first end corresponding to the first heating element is twice the area of the first end corresponding to the second heating element;

The second fan is provided with a second end, the second end is an air inlet end or an air outlet end of the second fan, the second end corresponds to the second heating piece and the third heating piece, the area of the second end corresponding to the third heating piece is twice the area of the second heating piece, and the area of the second end corresponding to the second heating piece is equal to the area of the first end corresponding to the second heating piece.

The sixth scheme is based on the fifth scheme, the first end and the second end are respectively located at two sides of the first face, the first face is perpendicular to the first direction, and the distances from the first heating element to the first face are equal to the distances from the third heating element to the first face.

The seventh aspect is based on the sixth aspect, wherein the first end and the second end are symmetrically disposed with respect to the first surface and located in an upper area or a lower area of the heat generating component.

The scheme eight, based on scheme five, the casing still is equipped with first air outlet, the air inlet wind channel is equipped with first air intake, first air intake with first air outlet is used for heating element's heat dissipation air inlet and heat dissipation air-out, first air outlet is located the lower extreme of casing, first air intake is located the top of first air outlet.

The ninth scheme is that the photovoltaic inverter comprises the heat dissipation device according to any one of the first to eighth schemes, wherein the heating cavity is internally provided with high-protection electrical components, the air inlet duct is used for dissipating heat of the low-protection electrical components, the shell is provided with an air inlet and an air outlet for heat exchange, and the air inlet is isolated from the air outlet.

According to the tenth scheme, based on the ninth scheme, the air inlet and the air outlet are not positioned on the same wall of the shell, or the air inlet and the air outlet are positioned on the same wall of the shell, the air inlet and the air outlet are respectively positioned at the middle part and the lower part of the shell, or the upper part and the lower part of the shell, or the air inlet and the air outlet are positioned on the same wall of the shell, and the air inlet path of the air inlet and the air outlet path of the air outlet are not overlapped.

As can be seen from the above description of the present utility model and the preferred embodiments thereof, compared with the prior art, the technical solution of the present utility model and the preferred embodiments thereof have the following beneficial effects due to the following technical means:

1. in one aspect and preferred embodiments thereof, a heat dissipating device includes a housing,

The casing is equipped with the air inlet wind channel and is located the heating chamber in the air inlet wind channel outside, is suitable for into cold wind in the air inlet wind channel, and the heating chamber is because inside has heating element, consequently can have relatively higher temperature, and is suitable for into cold wind in the air inlet wind channel, consequently, its inside temperature can be lower, the heating chamber can be to the heat conduction of air inlet wind channel to taken away the heat, and is further, be equipped with heat dissipation mechanism on the wall through the air inlet wind channel, so that the heating chamber dispels the heat through the air inlet wind channel, strengthens the heat dissipation through heat dissipation mechanism's effect, thereby make the radiating effect of heating chamber better.

2. In the second scheme and the preferred implementation mode thereof, the heat dissipation mechanism is a radiator, and the radiator is fixed on the air inlet duct, so that the heat dissipation of the heating cavity is realized through the effect of the radiator, and the heat dissipation effect of the heating cavity is improved.

3. In the third scheme and the preferred implementation mode, the heat dissipation mechanism is a rolling rib, and the rolling rib is convexly arranged in the air inlet duct so as to increase the inner wall area and the outer wall area of the air inlet duct. So as to increase the heat exchange area and further reduce the temperature of the heating cavity. Meanwhile, the wind speed in the air inlet duct is weaker, the internal air flow is mostly laminar (the heat exchange effect is poorer), the rolling ribs are convexly arranged in the air inlet duct, so that the turbulence can be further realized, the heat exchange is enhanced, and the strength of the air inlet duct can be further increased by the rolling ribs.

4. In the scheme IV and the preferred implementation mode thereof, the fan assembly and the heating assembly are arranged in the cover body, the heating assembly comprises a plurality of heating elements which are sequentially arranged along the first direction, and each heating element is sequentially arranged, so that heat can be radiated to adjacent heating elements except for each heating element, the air inlet end or the air outlet end of the fan assembly corresponds to each heating element, each heating element can have better heat radiation, the temperature difference between each heating element and other heating elements is reduced, the air inlet end or the air outlet end corresponds to the heating element directly, and compared with the chamber where the heating element is positioned, the heat radiation is carried out, and the heat radiation effect is better.

5. In a fifth aspect and preferred embodiments thereof, a heat dissipating device, a fan assembly includes a first fan and a second fan.

The heating component comprises a first heating element, a second heating element and a third heating element which are sequentially arranged along a first direction and have the same specification, wherein the first heating element, the second heating element and the third heating element have the same specification, namely the parameters such as the size, the power and the like of the first heating element, the second heating element and the third heating element are the same.

The first fan is used for the heat dissipation of heating element, and first fan installs in the casing, and first fan is equipped with first end, and first end is the air inlet end or the air-out end of first fan, and first end corresponds with first piece and the second piece that generates heat, and the area that first end corresponds with first piece that generates heat is the twice of the area that corresponds with the second piece that generates heat.

The second fan is used for the heat dissipation of heating element, the second fan is installed in the casing, the second fan is equipped with the second end, the second end is the air inlet end or the air-out end of second fan, the second end corresponds with second piece and the third piece that generates heat, and the second end corresponds the area that the piece corresponds with the third piece that generates heat for the area that corresponds with the second, the area that the second end corresponds with the second piece that generates heat equals the area that the first end corresponds with the second piece that generates heat, therefore, in sum, the fan area that the first piece that generates heat, the second piece that generates heat, the third piece that generates heat corresponds equals, the radiating area is the same, can make the first piece that generates heat, the second piece that generates heat, the third piece that generates heat temperature more even, convenient to use.

When the first end is the air outlet end of the first fan and the second end is the air outlet end of the second fan, heat generated by the heating component is not discharged through the first fan and the second fan, and the service lives of the first fan and the second fan can be prolonged.

6. In the sixth aspect and the preferred embodiment thereof, the first end and the second end are respectively located at two sides of the first surface, the first surface is perpendicular to the first direction, the distance from the first heating element to the first surface is equal to the distance from the third heating element to the first surface, so that the two sides of the second heating element are respectively affected by the first fan and the second fan, one side of the first heating element, which is close to the second heating element, is affected by the first fan, and one side of the third heating element, which is close to the second heating element, is affected by the second fan, even if the first heating element and the third heating element radiate heat to the second heating element, due to the fact that the two sides of the second heating element are affected by the fans, the second heating element radiates heat more uniformly than the first heating element and the third heating element, the radiating effect is better, so that the temperature of the first heating element, the second heating element and the third heating element is more uniform.

7. In the seventh scheme and the preferred implementation manner thereof, the first end and the second end are symmetrically arranged relative to the first face and are located in an upper area or a lower area of the heating component, the first end and the second end cannot laterally protrude relative to the heating component, side space cannot be occupied, meanwhile, the first end and the second end completely correspond to the heating component, heat dissipation area cannot be wasted, and heat dissipation effect is better.

8. In scheme eight and preferred embodiment, when heat abstractor when outdoor use, pile up the sand wind around easily, and the temperature of earth's surface receives the sunlight reason temperature higher, first air outlet is located the lower extreme of casing, helps blowing off around the sand wind, and first air intake is located on the first air outlet, is farther from ground, is difficult for inhaling the sand wind, and upper portion air temperature is lower, ensures that the temperature of first air intake is lower.

9. In a ninth aspect and the preferred embodiments thereof, a photovoltaic inverter includes the above heat dissipating device, the heating cavity is used for setting high protection electrical components, the air inlet duct is used for dissipating heat for low protection electrical components, the shell is provided with an air inlet and an air outlet for heat exchange, and the air inlet is isolated from the air outlet, so as to prevent hot air from flowing back to the air inlet to affect heat dissipation. The air inlet and the air outlet can comprise a first air inlet and a first air outlet which are eight-point in scheme, and can also comprise air inlets and air outlets with heat exchange functions at other positions of the photovoltaic inverter.

10. In the tenth aspect and the preferred embodiment thereof, the air inlet and the air outlet are not located on the same wall of the casing, thereby preventing backflow of hot air.

Or the air inlet and the air outlet are positioned on the same wall of the shell, and the air inlet and the air outlet are respectively positioned at the middle part and the lower part of the shell, or the upper part and the lower part of the shell, so that the hot air is prevented from flowing back by increasing the distance between the air inlet and the air outlet. And when the air inlet is positioned in the middle part or the upper part of the shell, the temperature of the air inlet can be ensured to be low, and the temperature rise of the ground caused by sunlight is reduced to be sucked into the air inlet.

Or the air inlet and the air outlet are positioned on the same wall of the shell, the air inlet path of the air inlet is not overlapped with the air outlet path of the air outlet, and the hot air backflow is prevented by changing the air inlet direction and the air outlet direction.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a photovoltaic inverter of a first embodiment;

FIG. 2 is a perspective view of a photovoltaic inverter of an embodiment with another view;

FIG. 3 is a perspective view of an air inlet duct in the first embodiment;

FIG. 4 is a perspective view of a first fan and a second fan according to the first embodiment;

FIG. 5 is a schematic diagram showing a heat generating component according to the first embodiment;

FIG. 6 is a perspective view showing a part of the structure of an air inlet duct in the first embodiment;

FIG. 7 is a schematic view of a part of the structure of an air inlet duct in the first embodiment;

fig. 8 is a schematic structural diagram of a photovoltaic inverter according to the first embodiment.

The main reference numerals illustrate:

The shell 1, the first air inlet 111, the first air outlet 112, the heat exchanger air inlet 121, the heat exchanger air outlet 122, the dry cooler air inlet 131, the dry cooler air outlet 132, the first wall 14, the second wall 15, the third wall 16, the fourth wall 17, the air inlet duct 18, the rolling rib 181 and the ventilation cavity 19;

The heating component 2, the first heating element 21, the second heating element 22, the third heating element 23, the first fan 3, the first end 31, the second fan 4, the second end 41, the first surface 5, the first direction 6 and the heating cavity 7;

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1-5, a photovoltaic inverter includes a heat sink, a heat exchanger, and a dry cooler.

The heat dissipation device comprises a shell 1, a heating component 2 and a fan component.

The shell 1 is internally provided with corresponding chambers for installing a heat exchanger, a drier-cooler, a heating component 2 and a fan component.

The shell 1 is provided with a plurality of air inlets and air outlets for heat exchange, and the air inlets are isolated from the air outlets so as to prevent hot air sent out by the air outlets from flowing back to the air inlets and affecting heat dissipation. Referring to fig. 1-2, the air inlet and the air outlet can be isolated by one or a combination of multiple modes, namely, ① the air inlet and the air outlet are not positioned on the same wall of the shell 1, ② the air inlet and the air outlet are positioned on the same wall of the shell 1, the air inlet and the air outlet are respectively positioned at the middle part and the lower part of the shell 1 or the upper part and the lower part of the shell 1, so that mutual isolation is realized by a larger distance between the air inlet and the air outlet, ③ the air inlet and the air outlet are positioned on the same wall of the shell 1, and the air inlet path of the air inlet is not overlapped with the air outlet path of the air outlet.

Referring to fig. 1-2, in the present embodiment, the air inlets are three types, namely, a first air inlet 111, a heat exchanger air inlet 121, and a dry cooler air inlet 131, and the air outlets are three types, namely, a first air outlet 112, a heat exchanger air outlet 122, and a dry cooler air outlet 132, wherein the first air inlet 111 and the first air outlet 112 are used for heat dissipation air inlet and heat dissipation air outlet of the heating component 2, the heat exchanger air inlet 121 and the heat exchanger air outlet 122 are used for heat dissipation air inlet and heat dissipation air outlet of the heat exchanger, and the dry cooler air inlet 131 and the dry cooler air outlet 132 are used for heat dissipation air inlet and heat dissipation air outlet of the dry cooler.

The casing 1 is substantially rectangular and comprises a first wall 14, a second wall 15, a third wall 16 and a fourth wall 17 which are sequentially connected, wherein the first wall 14 is narrower than the second wall 15, and the following ways for isolating an air inlet and an air outlet of two photovoltaic inverters are provided:

Referring to fig. 1-2, two first air inlets 111 (each air inlet may include a plurality of air inlets, and other air inlets are similar) and a heat exchanger air outlet 122 are disposed on the first wall 14, the heat exchanger air outlet 122 is disposed above the first air inlet 111, and because the distance between the first air inlet 111 and the heat exchanger air outlet 122 is relatively short, in this mode, the first air inlet 111 is disposed obliquely downward to intake air from an obliquely downward direction, the heat exchanger air outlet 122 is disposed obliquely upward to discharge air obliquely upward, the second wall 15 is disposed with two air inlets 131 of the air dryer and two air outlets 112 of the air dryer, the air inlets 131 of the air dryer and the air outlets 112 of the air dryer are disposed at the upper end and the lower end of the casing 1 respectively, and the third wall 16 is disposed with one air inlet 131 of the air dryer, one air inlet 121 of the heat exchanger and one air outlet 112 sequentially from top to bottom. The fourth wall 17 is provided with two main cooler air inlets 131 and two first air outlets 112. Two dry cooler outlets 132 are located in the top wall of the housing 1. The air inlets of the same kind are positioned at the same height, and the air outlets of the same kind are positioned at the same height.

The second mode is that the first wall 14 is provided with a main cooler air inlet 131, a heat exchanger air inlet 121 and two first air inlets 111 from top to bottom in sequence, the second wall 15 is provided with two main cooler air inlets 131 and two first air outlets 112 from top to bottom in sequence, the third wall 16 is provided with a heat exchanger air outlet 122 and one first air outlet 112 from top to bottom, and the fourth wall 17 is provided with two main cooler air inlets 131 and two first air outlets 112. Two dry cooler outlets 132 are located in the top wall of the housing 1. The air inlets of the same kind are positioned at the same height, and the air outlets of the same kind are positioned at the same height.

In the two modes, various air inlets are positioned at the middle part or the upper part of the shell 1 so as to prevent the heat generated by solar radiation at the ground from being sucked. Other modes can be provided besides the specific modes, and the number of the air inlets and the air outlets of various types can be different from the number of the air inlets and the air outlets in the specific modes, and the detailed description is omitted.

Referring to fig. 3-5 and 8, the casing 1 is further provided with an air inlet duct 18 and a cover, and the casing 1 is provided with a heating cavity 7 positioned outside the cover and the air inlet duct 18. The heating cavity is used for arranging high-protection electrical components such as a capacitor, an IGBT power tube and the like. The air inlet duct 18 is positioned in the shell 1, cold air communicated with the outside is arranged in the air inlet duct 18, and the heating cavity 7 is positioned outside the air inlet duct 18, so that hot air (caused by heating of a heating element in the heating cavity 7) is arranged outside the air inlet duct 18. The air inlet end of the air inlet duct 18, that is, the first air inlet 111, preferably, referring to fig. 6 and 7, the air inlet duct 18 has a rolling rib 181 protruding into the air inlet duct 18 to increase the inner wall area and the outer wall area of the air inlet duct 18. The beads 181 may be formed by punching. The two air inlet channels 18 are arranged at intervals along the first direction 6, and the air inlet channels 18 extend along a horizontal direction perpendicular to the first direction 6, wherein the first direction 6 is perpendicular to the second wall 15. The cover body is provided with a ventilation cavity 19 to be communicated with the air inlet channels 18, specifically, the ventilation cavity 19 is approximately located between the two air inlet channels 18 and is communicated with the two air inlet channels 18, and the bottom of the ventilation cavity 19 is communicated with each first air outlet 112, as shown in fig. 2. The air intake duct 18 is used to dissipate heat from low protection electrical components within the enclosure, such as the reactor assembly.

Referring to fig. 5, the heat generating component 2 is installed in the ventilation cavity 19 of the cover body, the heat generating component 2 includes a plurality of heat generating elements sequentially arranged along a first direction, in this embodiment, the heat generating component 2 includes a first heat generating element 21, a second heat generating element 22 and a third heat generating element 23 which are sequentially arranged along a first direction 6 and have the same specification, that is, the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 have the same specification, that is, the size, the power and other parameters of the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 are the same, in other embodiments, the heat generating component includes two heat generating elements or more heat generating elements, the first surface 5 is perpendicular to the first direction 6, the distance from the first heat generating element 21 and the third heat generating element 23 to the first surface 5 is the same, and meanwhile, the parts of the second heat generating element 22 on two sides of the first surface 5 are the same. In this embodiment, the heat generating component 2 is a reactor component, and the first heat generating element 21, the second heat generating element 22, and the third heat generating element 23 are coils.

The fan assembly is arranged in the cover body, the air inlet end or the air outlet end of the fan assembly corresponds to each heating element, wherein the corresponding means that the projection of the air inlet end or the air outlet end of the fan assembly overlaps with the projection of the heating element.

In this embodiment, the fan assembly includes a first fan 3 and a second fan 4, and in other embodiments, there may be a greater number of fans, or only one.

In this embodiment, the air cooler, the heat exchanger, the first fan 3, and the heating component 2 are sequentially disposed from top to bottom, where the second fan 4 and the first fan 3 are located at the same height.

In this embodiment, the air inlet channels 18 are two and are respectively communicated with the air inlet ends of the first fan 3 and the second fan 4. Referring to fig. 5, the first fan 3 is mounted on the housing 1, the first fan 3 is provided with a first end 31, the first end 31 is located in the ventilation cavity 19 and is located above the heating component 2, in this embodiment, the first end 31 is an air outlet end of the first fan 3 to convey cold air to the heating component 2, the first end 31 corresponds to the first heating element 21 and the second heating element 22, and the area of the first end 31 corresponding to the first heating element 21 is twice the area corresponding to the second heating element 22, that is, the area of the first end 31 corresponding to the first heating element 21 is 2a, and the area corresponding to the second heating element 22 is a, in this embodiment, a is 1/3 of the projection of the first end 31 on the heating component 2.

Referring to fig. 5, the second fan 4 is mounted on the housing 1, the second fan 4 is provided with a second end 41, the second end 41 is located in the ventilation cavity 19 and located in an area above the heat generating component 2 (in other embodiments, may also be located in an area below the heat generating component 2), in this embodiment, the second end 41 is an air outlet end of the second fan 4 to convey cold air to the heat generating component 2, the second end 41 corresponds to the second heat generating element 22 and the third heat generating element 23, the area of the second end 41 corresponds to the third heat generating element 23 is twice the area of the second heat generating element 22, the area of the second end 41 corresponds to the second heat generating element 22 is equal to the area of the first end 31 corresponds to the second heat generating element 22, that is, the area of the second end 41 corresponds to the third heat generating element 23 is 2a, and the area corresponding to the second heat generating element 22 is a, so that, in combination, the areas of the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 are all 2a, and when the fans are discharged, the temperatures of the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 are substantially equal to each other, and the heat radiating element 21 and the second heat generating element 23 are substantially equal to each other.

Preferably, referring to fig. 5, the first end 31 and the second end 41 are located on two sides of the first surface 5, and further, the first end 31 and the second end 41 are symmetrically disposed with respect to the first surface 5, and the first end 31 and the second end 41 are located in an upper area of the heat generating component 2 (taking the ground as a projection plane, and the projection plane of the heat generating component 2 encloses the projection planes of the first end 31 and the second end 41). In this embodiment, the first fan 3 and the second fan 4 are both centrifugal fans, the centrifugal fans are axially air-fed and are thrown around, and the lower area of each centrifugal fan corresponds to the heating component 2, although in other embodiments, other forms of the centrifugal fans may be adopted, for example, the centrifugal fans may be far away from the heating component 2, and blow or suck air to the heating component 2 through the ventilation duct, and at this time, the opening of the ventilation duct in the ventilation cavity 19 is the first end 31 or the second end 41. The first end 31 and the second end 41 are located at the same height in this embodiment, and may be located at different heights in other embodiments.

In other embodiments, the first end 31 may be an air inlet end of the first fan 3, the second end 41 may be an air inlet end of the second fan 4, so as to output hot air generated by the heat generating component 2 to the outside of the housing 1, and the first fan 3 and the second fan 4 evenly distribute air to the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 as in the above embodiments, so that the air volume passing through the second heat generating element 22 is the same as the air volume passing through the first heat generating element 21 and the third heat generating element 23, thereby ensuring that the temperature difference among the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 is smaller.

Compared with the prior art, the embodiment has the following beneficial effects:

in an exemplary embodiment, a heat dissipating device, comprising a housing 1,

The shell 1 is provided with an air inlet duct 18 and a heating cavity 7 positioned outside the air inlet duct 18, cold air is suitable for entering the air inlet duct 18, the heating cavity 7 has relatively high temperature due to the fact that a heating element is arranged inside the air inlet duct 18, the air inlet duct 18 is suitable for entering the cold air, the temperature inside the air inlet duct is relatively low, the heating cavity 7 conducts heat to the air inlet duct 18 so as to take away heat, and further, a heat dissipation mechanism is arranged on the wall surface of the air inlet duct 18 so that the heating cavity 7 dissipates heat through the air inlet duct 18, and the heat dissipation is enhanced through the effect of the heat dissipation mechanism, so that the heat dissipation effect of the heating cavity 7 is better.

In an exemplary embodiment, the heat dissipation mechanism is a radiator, and the radiator is fixed on the air inlet duct 18, so that heat dissipation of the heating cavity 7 is achieved through the effect of the radiator, and the heat dissipation effect of the heating cavity 7 is improved.

In an exemplary embodiment, the heat dissipation mechanism is a roller rib 181, and the roller rib 181 is protruding into the air inlet duct 18 to increase the inner wall area and the outer wall area of the air inlet duct 18. So as to increase the heat exchange area and further reduce the temperature of the heating cavity 7. Meanwhile, because the wind speed in the air inlet duct 18 is weaker, the internal air flow is mostly laminar (the heat exchange effect is poorer), the rolling ribs 181 are convexly arranged in the air inlet duct 18, so that the turbulence can be further realized, the heat exchange is enhanced, and the strength of the air inlet duct 18 can be further increased by the rolling ribs 181.

In an exemplary embodiment, the fan assembly and the heating assembly 2 are arranged in the cover body, the heating assembly 2 is arranged in the shell body, the heating assembly 2 comprises a plurality of heating elements which are sequentially arranged along a first direction, and each heating element is sequentially arranged, so that heat can be radiated to adjacent heating elements except for each heating element, the air inlet end or the air outlet end of the fan assembly corresponds to each heating element, each heating element can have better heat radiation, the temperature difference between each heating element and other heating elements is reduced, the air inlet end or the air outlet end corresponds to the heating element directly, and compared with a cavity where the heating element is located, the heat radiation effect is better.

In an exemplary embodiment, the fan assembly includes a first fan 3 and a second fan 4.

The heating component 2 is mounted on the housing 1, and includes a first heating element 21, a second heating element 22 and a third heating element 23 which are sequentially arranged along the first direction 6 and have the same specification, wherein the first heating element 21, the second heating element 22 and the third heating element 23 have the same specification, i.e. the parameters such as the size, the power and the like of the first heating element 21, the second heating element 22 and the third heating element 23 are the same.

The first fan 3 is used for the heat dissipation of heating element 2, and first fan 3 installs in casing 1, and first fan 3 is equipped with first end 31, and first end 31 is the air inlet end or the air-out end of first fan 3, and first end 31 corresponds with first heating element 21 and second heating element 22, and the area that first end 31 corresponds with first heating element 21 is twice the area that corresponds with second heating element 22.

The second fan 4 is used for the heat dissipation of the heating component 2, the second fan 4 is installed in the casing 1, the second fan 4 is provided with a second end 41, the second end 41 is an air inlet end or an air outlet end of the second fan 4, the second end 41 corresponds to the second heating element 22 and the third heating element 23, the area of the second end 41 corresponding to the third heating element 23 is twice that of the second heating element 22, and the area of the second end 41 corresponding to the second heating element 22 is equal to that of the first end 31 corresponding to the second heating element 22, so that, in combination, the fan areas corresponding to the first heating element 21, the second heating element 22 and the third heating element 23 are equal, the heat dissipation areas are the same, and the temperatures of the first heating element 21, the second heating element 22 and the third heating element 23 are more uniform, and the use is convenient.

When the first end 31 is the air outlet end of the first fan 3 and the second end 41 is the air outlet end of the second fan 4, the heat generated by the heating component 2 is not discharged through the back of the first fan 3 and the second fan 4, so that the service lives of the first fan 3 and the second fan 4 can be prolonged.

In an exemplary embodiment, the first end 31 and the second end 41 are respectively located at two sides of the first surface 5, the first surface 5 is perpendicular to the first direction 6, and the distances from the first heat generating element 21 and the third heat generating element 23 to the first surface 5 are equal, so that two sides of the second heat generating element 22 are respectively acted by the first fan 3 and the second fan 4, and one side of the first heat generating element 21, which is close to the second heat generating element 22, is acted by the first fan 3, and one side of the third heat generating element 23, which is close to the second heat generating element 22, is acted by the second fan 4, even if the first heat generating element 21 and the third heat generating element 23 radiate heat to the second heat generating element 22, because the two sides of the second heat generating element 22 are acted by fans, compared with the way that one side of the first heat generating element 21 and the third heat generating element 23 are acted by fans, the heat radiating effect of the second heat generating element 22 is more uniform, so as to overcome the influence of heat radiation, and further make the temperatures of the first heat generating element 21, the second heat generating element 22 and the third heat generating element 23 more uniform.

In an exemplary embodiment, the first end 31 and the second end 41 are symmetrically disposed with respect to the first surface 5 and are located in an upper area or a lower area of the heat generating component 2, so that the first end 31 and the second end 41 do not laterally protrude with respect to the heat generating component 2 and do not occupy a lateral space, and meanwhile, the first end 31 and the second end 41 completely correspond to the heat generating component 2, so that a heat dissipation area is not wasted, and a heat dissipation effect is better.

In an exemplary embodiment, when the heat dissipating device is used outdoors, wind and sand are easily accumulated around, the temperature of the ground surface is higher due to sunlight, the first air outlet 112 is located at the lower end of the housing 1 to help blow out the wind and sand around, the first air inlet 111 is located above the first air outlet 112, further away from the ground, and not easy to suck the wind and sand, and the upper air temperature is lower, so that the temperature of the first air inlet 111 is ensured to be lower.

In an exemplary embodiment, a photovoltaic inverter includes the above heat dissipating device, the heat generating cavity 7 is used for setting high protection electrical components, the air inlet duct 18 is used for dissipating heat for low protection electrical components, the housing 1 is provided with an air inlet and an air outlet for heat exchange, and the air inlet is isolated from the air outlet, so as to prevent hot air from flowing back to the air inlet to affect heat dissipation. The air inlet and the air outlet can comprise a first air inlet 111 and a first air outlet 112 which are referred to in the fifth scheme, and can also comprise air inlets and air outlets with heat exchange functions at other positions of the photovoltaic inverter.

In an exemplary embodiment, the air inlet and the air outlet are not located on the same wall of the housing 1, thereby preventing backflow of hot air.

Or the air inlet and the air outlet are positioned on the same wall of the shell 1, and the air inlet and the air outlet are respectively positioned at the middle part and the lower part of the shell 1, or the upper part and the lower part of the shell 1, so that the hot air backflow is prevented by increasing the distance between the air inlet and the air outlet. And when the air inlet is positioned at the middle part or the upper part of the shell 1, the temperature of the air inlet is ensured to be low, and the temperature rise of the ground caused by sunlight is reduced to be sucked into the air inlet.

Or the air inlet and the air outlet are positioned on the same wall of the shell 1, the air inlet path of the air inlet is not overlapped with the air outlet path of the air outlet, and the hot air backflow is prevented by changing the air inlet direction and the air outlet direction.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (10)

1. A heat dissipation device is characterized by comprising

The shell (1) is provided with an air inlet duct (18) and a heating cavity (7) positioned outside the air inlet duct, cold air is suitable for entering the air inlet duct, and a heat dissipation mechanism is arranged on the wall surface of the air inlet duct (18), so that the heating cavity (7) dissipates heat through the air inlet duct.

2. A heat sink according to claim 1, characterised in that the heat dissipation means is a radiator, which is fixed to the air intake duct (18).

3. A heat dissipating device according to claim 1, wherein said heat dissipating means is a roller rib protruding into said air inlet duct (18) to increase the inner wall area and the outer wall area of said air inlet duct (18).

4. The heat dissipating double-fuselage of claim 1, wherein also include heating assembly (2) and blower assembly, the said body (1) also includes the cover, the said cover communicates with said air inlet duct (18), the said heating cavity (7) locates at the outside of the said cover, the said heating assembly (2) is placed in the said cover, it includes several heating elements that set up sequentially along the first direction (6);

The fan assembly is arranged in the cover body, the air inlet end or the air outlet end of the fan assembly corresponds to each heating element, and the air inlet end of the fan assembly is communicated with the air inlet duct (18) so as to radiate heat for the heating assembly (2).

5. The heat dissipating device of claim 4, wherein the heat generating component (2) comprises a first heat generating element (21), a second heat generating element (22) and a third heat generating element (23) which are sequentially arranged along the first direction (6) and have the same specification;

The fan assembly comprises a first fan (3) and a second fan (4),

The first fan (3) is provided with a first end (31), the first end (31) is an air inlet end or an air outlet end of the first fan (3), the first end (31) corresponds to the first heating element (21) and the second heating element (22), and the area of the first end (31) corresponding to the first heating element (21) is twice the area of the first end corresponding to the second heating element (22);

The second fan (4) is provided with a second end (41), the second end (41) is an air inlet end or an air outlet end of the second fan (4), the second end (41) corresponds to the second heating element (22) and the third heating element (23), the area of the second end (41) corresponds to the third heating element (23) is twice the area of the second heating element (22), and the area of the second end (41) corresponds to the second heating element (22) is equal to the area of the first end (31) corresponds to the second heating element (22).

6. A heat dissipating device according to claim 5, wherein said first end (31) and said second end (41) are located on opposite sides of a first surface (5), respectively, said first surface (5) being perpendicular to a first direction (6), and wherein said first heat generating element (21) and said third heat generating element (23) are equidistant from said first surface (5).

7. A heat sink according to claim 6, characterized in that the first end (31) and the second end (41) are symmetrically arranged with respect to the first face (5) and are located in an upper or lower area of the heat generating component (2).

8. A heat dissipating device according to claim 5, wherein said housing (1) is further provided with a first air outlet (112), said air inlet duct (18) is provided with a first air inlet (111), said first air inlet (111) and said first air outlet (112) are used for heat dissipation air inlet and heat dissipation air outlet of said heat generating component (2), said first air outlet (112) is located at the lower end of said housing (1), and said first air inlet (111) is located above said first air outlet (112).

9. The photovoltaic inverter is characterized by comprising the heat dissipation device as claimed in any one of claims 1-8, wherein a high-protection electrical component is arranged in the heating cavity (7), the air inlet duct (18) is used for dissipating heat of a low-protection electrical component, the shell (1) is provided with an air inlet and an air outlet for heat exchange, and the air inlet is isolated from the air outlet.

10. A photovoltaic inverter according to claim 9, characterized in that the inlet and the outlet are not located on the same wall of the housing (1), or in that the inlet and the outlet are located on the same wall of the housing (1), the inlet and the outlet being located in the middle and lower parts of the housing (1), respectively, or in the upper and lower parts of the housing (1), or in that the inlet and the outlet are located on the same wall of the housing (1), the inlet path of the inlet and the outlet path of the outlet being non-coincident.