Electric reactor heat dissipation device and photovoltaic inverter

Abstract

The utility model discloses a reactor heat dissipation device and a photovoltaic inverter, and the reactor heat dissipation device comprises a housing, a coil assembly and a fan assembly. The coil assemblies are sequentially arranged in the first direction, and all the coil assemblies are sequentially arranged, so that all the coil assemblies can emit heat independently and also can radiate heat to the adjacent coil assemblies; according to the scheme, the draught fan assembly is installed on the shell, the air inlet end or the air outlet end of the draught fan assembly corresponds to all the coil assemblies, all the coil assemblies can have good heat dissipation, the temperature difference between all the coil assemblies and other coil assemblies is reduced, the air inlet end or the air outlet end directly corresponds to the coil assemblies, and therefore the heat dissipation efficiency is improved. And compared with heat dissipation of the cavity where the coil assembly is located, the heat dissipation effect is better. And moreover, the fan assembly is positioned above each coil assembly, so that all air can completely pass through the coil assemblies, and better heat dissipation is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical equipment field, concretely relates to electric reactor heat abstractor and photovoltaic inverter. BACKGROUND

[0002] In prior art, electric reactor includes three line packages arranged in sequence, for the heat dissipation of electric reactor, usually, fan is arranged at both ends of electric reactor along the arrangement direction of line package to carry out heat dissipation, however, since the line package on both sides is relatively close to corresponding fan, heat dissipation is fast, but the line package in the middle is relatively far from the fan on both sides, and is affected by the heat radiation of line package on both sides, so that its heat dissipation speed is relatively slow, leading to that the temperature of middle line package is high, the temperature of three line packages is inconsistent, and use is affected. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects or problems existing in background art, and provides electric reactor heat abstractor and photovoltaic inverter.

[0004] To achieve the above-mentioned purpose, the utility model and its preferred embodiment adopt the following technical scheme, but the embodiment is not limited to the following scheme:

[0005] Scheme one, a kind of electric reactor heat abstractor, comprising

[0006] Shell;

[0007] Several coil assemblies are sequentially arranged along horizontal first direction;

[0008] Fan assembly is installed in the shell and is located above each coil assembly, and the air inlet area or air outlet area of fan assembly corresponds to each coil assembly.

[0009] Scheme two, based on scheme one, comprising

[0010] The number of coil assemblies is three, it is first coil assembly, second coil assembly and third coil assembly sequentially arranged along first direction and same in specification;

[0011] The fan assembly includes first fan and second fan,

[0012] The first fan is provided with first end, the first end is the air inlet end or air outlet end of the first fan, the first end corresponds to the first coil assembly and the second coil assembly, and the area corresponding to the first coil assembly is twice the area corresponding to the second coil assembly;

[0013] The second fan has a second end, which is either the air inlet or the air outlet of the second fan. The second end corresponds to the second coil assembly and the third coil assembly, and the area of ​​the second end corresponding to the third coil assembly is twice the area corresponding to the second coil assembly. The area of ​​the second end corresponding to the second coil assembly is equal to the area of ​​the first end corresponding to the second coil assembly.

[0014] Option 3, based on Option 2, has the first end and the second end located on opposite sides of the first surface, the first surface being perpendicular to the first direction, and the first coil assembly and the third coil assembly being equidistant from the first surface.

[0015] Option 4, based on Option 3, involves symmetrically arranging the first end and the second end relative to the first surface.

[0016] Option 5, based on Option 2, the housing is provided with two air inlet ducts, which are respectively connected to the air inlet ends of the first fan and the second fan. 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. The air inlet duct is fixed with a radiator or has rollers protruding into the air inlet duct.

[0017] Option 6, based on Option 2, the housing is provided with a first air inlet and a first air outlet. The first air inlet and the first air outlet are used for heat dissipation air intake and heat dissipation air exhaust of the coil assembly. The first air outlet is located at the lower end of the housing, and the first air inlet is located above the first air outlet.

[0018] Option 7: A photovoltaic inverter, comprising a reactor heat dissipation device as described in any one of Options 1 to 6, wherein the housing is provided with an air inlet and an air outlet for heat exchange, and the air inlet and the air outlet are isolated from each other.

[0019] Option 8, based on Option 7, involves the air inlet and the air outlet not being located on the same wall of the housing.

[0020] Alternatively, the air inlet and the air outlet may be located on the same wall of the housing, with the air inlet and the air outlet located in the middle and lower part of the housing, or the upper and lower part of the housing, respectively.

[0021] Alternatively, the air inlet and the air outlet may be located on the same wall of the housing, and the air inlet path and the air outlet path may not overlap.

[0022] Option 9, based on Option 7, has the air inlet located in the middle or upper part of the housing.

[0023] As can be seen from the above description of the present invention and its preferred embodiments, 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:

[0024] 1. In Scheme 1 and its preferred embodiments, a reactor heat dissipation device includes a housing, coil assemblies, and a fan assembly. Several coil assemblies are arranged sequentially along a first direction. Since each coil assembly generates heat individually, it also radiates heat to adjacent coil assemblies. This scheme uses a fan assembly mounted on the housing, with its inlet or outlet corresponding to each coil assembly, ensuring good heat dissipation for each coil assembly and reducing the temperature difference between them. Furthermore, the fan assembly is located above each coil assembly, allowing all airflow to pass completely through the coil assemblies for even better heat dissipation.

[0025] 2. In Scheme 2 and its preferred embodiments, a reactor heat dissipation device includes a fan assembly comprising a first fan and a second fan.

[0026] The number of coil assemblies is three, which are arranged sequentially along the first direction and are of the same specifications: a first coil assembly, a second coil assembly, and a third coil assembly. The same specifications mean that the first coil assembly, the second coil assembly, and the third coil assembly have the same size, power, and other parameters.

[0027] The first fan is installed on the housing. The first fan has a first end, which is either the air inlet or the air outlet of the first fan. The first end corresponds to the first coil assembly and the second coil assembly, and the area of ​​the first end corresponding to the first coil assembly is twice the area corresponding to the second coil assembly.

[0028] The second fan is installed in the housing and has a second end, which is either the air inlet or outlet of the second fan. The second end corresponds to the second coil assembly and the third coil assembly, and the area of ​​the second end corresponding to the third coil assembly is twice the area corresponding to the second coil assembly. The area of ​​the second end corresponding to the second coil assembly is equal to the area of ​​the first end corresponding to the second coil assembly. Therefore, in summary, the fan areas corresponding to the first coil assembly, the second coil assembly, and the third coil assembly are equal, and the heat dissipation area is the same, which can make the temperature of the first coil assembly, the second coil assembly, and the third coil assembly more uniform and convenient to use.

[0029] When the first end is the air outlet of the first fan and the second end is the air outlet of the second fan, the heat generated by the coil assembly will not be discharged after passing through the first and second fans, which can increase the life of the first and second fans.

[0030] 3. In Scheme 3 and its preferred embodiments, the first end and the second end are located on both sides of the first surface, the first surface is perpendicular to the first direction, and the distances from the first coil assembly and the third coil assembly to the first surface are equal. This allows the second coil assembly to be acted upon by the first fan and the second fan on both sides respectively. The side of the first coil assembly closer to the second coil assembly is acted upon by the first fan, and the side of the third coil assembly closer to the second coil assembly is acted upon by the second fan. Even if the first coil assembly and the third coil assembly radiate heat to the second coil assembly, the second coil assembly dissipates heat more evenly and has a better heat dissipation effect due to the way the second coil assembly is acted upon by the fans on both sides compared to the way the first coil assembly and the third coil assembly are acted upon by the fans on one side. This overcomes the influence of heat radiation and further makes the temperature of the first coil assembly, the second coil assembly, and the third coil assembly more uniform.

[0031] 4. In Scheme 4 and its preferred embodiments, the first end and the second end are symmetrically arranged relative to the first surface.

[0032] 5. In Scheme 5 and its preferred embodiments, the housing is provided with two air inlet ducts, which are respectively connected to the air inlet ends of the first and second fans. 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. Therefore, the inside of the air inlet duct is low-temperature gas, while the outside is high-temperature gas (caused by the heating of the components inside the housing). The air inlet duct is equipped with a heat sink or has ribs protruding into the air inlet duct to increase the heat exchange area and further reduce the temperature outside the air inlet duct. At the same time, since the air velocity inside the air inlet duct is relatively weak, the internal airflow is mostly laminar (poor heat exchange effect). The ribs protruding into the air inlet duct can further turbulent the airflow, enhance heat exchange, and also increase the strength of the air inlet duct.

[0033] 6. In Scheme 6 and its preferred embodiments, when the reactor heat dissipation device is used outdoors, sand and dust are easily accumulated around it, and the surface temperature is high due to sunlight. The first air outlet is located at the lower end of the casing, which helps to disperse the surrounding sand and dust. The first air inlet is located above the first air outlet, further away from the ground, making it less likely to draw in sand and dust. In addition, the upper air temperature is lower, ensuring that the temperature of the first air inlet is lower.

[0034] 7. In Scheme 7 and its preferred embodiments, a photovoltaic inverter includes the aforementioned reactor heat dissipation device. The housing is provided with an air inlet and an air outlet for heat exchange. The air inlet and air outlet are isolated to prevent hot air from flowing back to the air inlet and affecting heat dissipation. The air inlet and air outlet may include the first air inlet and first air outlet referred to in Scheme 6, and may also include air inlets and air outlets with heat exchange functions at other locations on the photovoltaic inverter.

[0035] 8. In Scheme 8 and its preferred embodiments, the air inlet and air outlet are not located on the same wall of the housing, thereby preventing hot air backflow.

[0036] Alternatively, the air inlet and outlet can be located on the same wall of the casing, with the air inlet and outlet located in the middle and lower parts of the casing, or the upper and lower parts of the casing, respectively. By increasing the distance between the air inlet and outlet, hot air backflow can be prevented.

[0037] Alternatively, the air inlet and outlet may be located on the same wall of the casing, and the air inlet path and the air outlet path may not coincide. By changing the air inlet and outlet directions, hot air backflow can be prevented.

[0038] 9. In Scheme 9 and its preferred embodiments, the air inlet is located in the middle or upper part of the housing to ensure that the temperature of the air inlet is low and to reduce the intake of air from the ground that is heated by sunlight. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a perspective view of photovoltaic inverter mode 1 in Example 1;

[0041] Figure 2 This is a perspective view of the photovoltaic inverter method 1 in Embodiment 1 from another angle;

[0042] Figure 3 This is a three-dimensional view of the air inlet duct in Example 1;

[0043] Figure 4 This is a perspective view of the first and second fans in Embodiment 1;

[0044] Figure 5 This is a schematic diagram of the coil assembly in Embodiment 1.

[0045] Explanation of key figure labels:

[0046] Shell 1; First air inlet 111; First air outlet 112; Heat exchanger air inlet 121; Heat exchanger air outlet 122; Dry cooler air inlet 131; Dry cooler air outlet 132; First wall 14; Second wall 15; Third wall 16; Fourth wall 17; Air inlet duct 18; Rib 181; Ventilation cavity 19;

[0047] First coil assembly 21; second coil assembly 22; third coil assembly 23; first fan 3; first end 31; second fan 4; second end 41; first surface 5; first direction 6; Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0049] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0050] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of the invention.

[0051] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0052] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0053] refer to Figures 1-5 A photovoltaic inverter includes a reactor heat dissipation device, a heat exchanger, and a dry cooler.

[0054] The reactor heat dissipation device includes a housing 1, a coil assembly, and a fan assembly.

[0055] The housing 1 has corresponding chambers inside for installing heat exchangers, dry coolers, coil assemblies, and fan assemblies.

[0056] The housing 1 is provided with several air inlets and outlets for heat exchange, and the air inlets and outlets are isolated to prevent hot air from the outlet from flowing back to the air inlet and affecting heat dissipation. (Reference) Figures 1-2 Specifically, the air inlet and outlet can be isolated by one or a combination of the following methods: ① The air inlet and outlet are not located on the same wall of the housing 1; ② The air inlet and outlet are located on the same wall of the housing 1, with the air inlet and outlet located in the middle and lower parts of the housing 1, or the upper and lower parts of the housing 1, respectively, so as to achieve mutual isolation by having a large distance between the air inlet and outlet; ③ The air inlet and outlet are located on the same wall of the housing 1, and the air inlet path and the air outlet path do not coincide.

[0057] refer to Figures 1-2 In this embodiment, there are three types of air inlets: a first air inlet 111, a heat exchanger air inlet 121, and a dry cooler air inlet 131. There are also three types of air outlets: a first air outlet 112, a heat exchanger air outlet 122, and a dry cooler air outlet 132. The first air inlet 111 and the first air outlet 112 are used for heat dissipation air intake and exhaust of the coil assembly. The heat exchanger air inlet 121 and the heat exchanger air outlet 122 are used for heat dissipation air intake and exhaust of the heat exchanger. The dry cooler air inlet 131 and the dry cooler air outlet 132 are used for heat dissipation air intake and exhaust of the dry cooler.

[0058] The housing 1 is generally rectangular and includes a first wall 14, a second wall 15, a third wall 16, and a fourth wall 17 connected in sequence. The first wall 14 is narrower than the second wall 15. The following provides two methods for isolating the air inlet and outlet of the photovoltaic inverter:

[0059] Method 1: Reference Figures 1-2 The first wall 14 is provided with two first air inlets 111 (each air inlet may include several air inlets, and the same applies to other types of air inlets) and a heat exchanger air outlet 122. The heat exchanger air outlet 122 is located above the first air inlets 111. Since the first air inlets 111 and the heat exchanger air outlet 122 are close to each other, in this configuration, the first air inlets 111 are set at an angle downward to allow air to enter from the downward direction, and the heat exchanger air outlet 122 is set at an angle upward to allow air to exit from the upward direction. The second wall 15 is provided with two dry cooler air inlets 131 and two first air outlets 112. The dry cooler air inlets 131 and the first air outlets 112 are located at the upper and lower ends of the shell 1, respectively. The third wall 16 is provided with one dry cooler air inlet 131, one heat exchanger air inlet 121 and one first air outlet 112 from top to bottom. The fourth wall 17 is provided with two dry cooler air inlets 131 and two first air outlets 112. The two dry cooler air outlets 132 are located on the top wall of the housing 1. Air inlets of the same type are located at the same height, and air outlets of the same type are located at the same height.

[0060] Method 2: The first wall 14, from top to bottom, has one dry cooler air inlet 131, one heat exchanger air inlet 121, and two first air inlets 111. The second wall 15, from top to bottom, has two dry cooler air inlets 131 and two first air outlets 112. The third wall 16, from top to bottom, has one heat exchanger air outlet 122 and one first air outlet 112. The fourth wall 17 has two dry cooler air inlets 131 and two first air outlets 112. The two dry cooler air outlets 132 are located on the top wall of the casing 1. Air inlets of the same type are located at the same height, and air outlets of the same type are located at the same height.

[0061] In both of the above methods, the various air inlets are located in the middle or upper part of the casing 1 to prevent the intake of hot air generated by solar radiation from the ground. In addition to the specific methods described above, other methods may also be used, and the number of air inlets and outlets for each type may not be the same as those described above, which will not be elaborated on here.

[0062] refer to Figures 3-5 The housing 1 also includes an air inlet duct 18 and a ventilation cavity 19. The air inlet duct 18 is located inside the housing 1, and the air inside the air inlet duct 18 is cold air connected to the outside, while the outside is hot air (due to the heating of the coil assembly or other parts inside the housing 1). The air inlet end of the air inlet duct 18 is the first air inlet 111. Preferably, the air inlet duct 18 is fixed with a radiator or has a roller rib 181 protruding into the air inlet duct 18 to increase the inner and outer wall areas of the air inlet duct 18. The roller rib 181 can be formed by stamping. The two air inlet ducts 18 are spaced apart along the first direction 6, and the air inlet ducts 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 ventilation cavity 19 is approximately located between the two air inlet ducts 18 and communicates with the two air inlet ducts 18. The bottom of the ventilation cavity 19 communicates with each of the first air outlets 112. Figure 2 As shown.

[0063] refer to Figure 5 The coil assemblies are installed in the ventilation cavity 19 of the housing 1. Multiple coil assemblies are present, and they are arranged sequentially along a first direction. In this embodiment, there are three coil assemblies: a first coil assembly 21, a second coil assembly 22, and a third coil assembly 23, arranged sequentially along the first direction 6 and of the same specifications. The same specifications mean that the dimensions, power, and other parameters of the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 are identical. Of course, in other embodiments, there can be two or more coil assemblies. The first surface 5 is perpendicular to the first direction 6. The distances from the first coil assembly 21 and the third coil assembly 23 to the first surface 5 are equal. Simultaneously, the portions of the second coil assembly 22 on both sides of the first surface 5 are identical. In this embodiment, all the coil assemblies together form a reactor, and the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 are coils.

[0064] The fan assembly is installed on the housing 1. The air inlet or air outlet of the fan assembly corresponds to each coil assembly. Correspondence means that the projection of the air inlet or air outlet of the fan assembly overlaps with the projection of the coil assembly.

[0065] In this embodiment, the fan assembly includes a first fan 3 and a second fan 4. In other embodiments, there may be more fans, or only one fan.

[0066] In this embodiment, the dry cooler, heat exchanger, first fan 3, and coil assembly are arranged sequentially from top to bottom, wherein the second fan 4 and the first fan 3 are located at the same height.

[0067] In this embodiment, there are two air inlet ducts 18, which are respectively connected to the air inlet ends of the first fan 3 and the second fan 4. (See reference) Figure 5 The first fan 3 is installed on the housing 1. The first fan 3 has a first end 31, which is located in the ventilation cavity 19 and above the coil assembly. In this embodiment, the first end 31 is the air outlet of the first fan 3 to deliver cold air to the heating component 2. The first end 31 corresponds to the first coil assembly 21 and the second coil assembly 22. The area of ​​the first end 31 corresponding to the first coil assembly 21 is twice the area corresponding to the second coil assembly 22. That is, the area of ​​the first end 31 corresponding to the first coil assembly 21 is 2a, and the area corresponding to the second coil assembly 22 is a. In this embodiment, a is 1 / 3 of the projection of the first end 31 onto the heating component 2.

[0068] refer to Figure 5 The second fan 4 is installed on the housing 1. The second fan 4 has a second end 41, which is located inside the ventilation cavity 19 and above the coil assembly. In this embodiment, the second end 41 is the outlet end of the second fan 4, which delivers cold air to the coil assembly. The second end 41 corresponds to the second coil assembly 22 and the third coil assembly 23, and the area of ​​the second end 41 corresponding to the third coil assembly 23 is twice the area corresponding to the second coil assembly 22. The area of ​​the second end 41 corresponding to the second coil assembly 22 is equal to the area of ​​the first end 31 corresponding to the second coil assembly 22. That is, the second end 41 and the third coil assembly 23 correspond to the second coil assembly 22. The area corresponding to the third coil assembly 23 is 2a, while the area corresponding to the second coil assembly 22 is a. Therefore, in summary, the heat dissipation areas corresponding to the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 are all 2a. When the fan blows air, the air volume delivered to the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 is basically the same. Therefore, the heat dissipation of the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 is roughly equal, resulting in a small temperature difference between the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23.

[0069] Preferred, Reference Figure 5 The first end 31 and the second end 41 are located on opposite sides of the first surface 5. Furthermore, the first end 31 and the second end 41 are symmetrically arranged relative to the first surface 5, and are located above the coil assembly. In this embodiment, both the first fan 3 and the second fan 4 are centrifugal fans. The centrifugal fan draws air axially and expels air around the coil assembly. The area below the centrifugal fan corresponds to the coil assembly. Of course, in other embodiments, other forms can be used. For example, the centrifugal fan can be located away from the coil assembly, blowing or drawing air onto the coil assembly through a ventilation duct. In this case, the opening of the ventilation duct within the ventilation cavity 19 is either the first end 31 or the second end 41. In this embodiment, the first end 31 and the second end 41 are at the same height; in other embodiments, they can be at different heights.

[0070] In other embodiments, the first end 31 can be the air inlet end of the first fan 3, and the second end 41 can be the air inlet end of the second fan 4, so as to output the hot air generated by the coil assembly to the outside of the housing 1. As in the above embodiments, the air volume of the first coil assembly 21, the second coil assembly 22 and the third coil assembly 23 are evenly distributed by the first fan 3 and the second fan 4, so that the air volume through the second coil assembly 22 is the same as the air volume through the first coil assembly 21 and the third coil assembly 23, thereby ensuring that the temperature difference between the first coil assembly 21, the second coil assembly 22 and the third coil assembly 23 is small.

[0071] Compared with the prior art, this embodiment has the following beneficial effects:

[0072] In one exemplary embodiment, a reactor heat dissipation device includes a housing 1, coil assemblies, and a fan assembly. A plurality of coil assemblies are sequentially arranged along a first direction. Since each coil assembly generates heat individually, it also radiates heat to adjacent coil assemblies. This solution uses a fan assembly mounted on the housing, with its inlet or outlet corresponding to each coil assembly, ensuring good heat dissipation for each coil assembly and reducing the temperature difference between them. Furthermore, the fan assembly is positioned above each coil assembly, allowing all airflow to pass completely through the coil assemblies for even better heat dissipation.

[0073] In one exemplary embodiment, the fan assembly includes a first fan 3 and a second fan 4.

[0074] A first coil assembly 21, a second coil assembly 22, and a third coil assembly 23 of the same specifications are arranged sequentially along the first direction 6. The same specifications mean that the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 have the same size, power, and other parameters.

[0075] The first fan 3 is installed on the housing 1. The first fan 3 has a first end 31, which is the air inlet or air outlet of the first fan 3. The first end 31 corresponds to the first coil assembly 21 and the second coil assembly 22, and the area of ​​the first end 31 corresponding to the first coil assembly 21 is twice the area corresponding to the second coil assembly 22.

[0076] The second fan 4 is installed on the housing 1. The second fan 4 has a second end 41, which is either the air inlet or the air outlet of the second fan 4. The second end 41 corresponds to the second coil assembly 22 and the third coil assembly 23. The area of ​​the second end 41 corresponding to the third coil assembly 23 is twice the area corresponding to the second coil assembly 22. The area of ​​the second end 41 corresponding to the second coil assembly 22 is equal to the area of ​​the first end 31 corresponding to the second coil assembly 22. Therefore, in summary, the fan areas corresponding to the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 are equal, and the heat dissipation area is the same, which can make the temperature of the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 more uniform and convenient to use.

[0077] When the first end 31 is the air outlet of the first fan 3 and the second end 41 is the air outlet of the second fan 4, the heat generated by the coil assembly will not be discharged after passing through the first fan 3 and the second fan 4, which can increase the life of the first fan 3 and the second fan 4.

[0078] In one exemplary embodiment, the first end 31 and the second end 41 are located on both sides of the first surface 5, which is perpendicular to the first direction 6. The distances from the first coil assembly 21 and the third coil assembly 23 to the first surface 5 are equal, so that the second coil assembly 22 is acted upon by the first fan 3 and the second fan 4 on both sides respectively. The side of the first coil assembly 21 closer to the second coil assembly 22 is acted upon by the first fan 3, and the side of the third coil assembly 23 closer to the second coil assembly 22 is acted upon by the second fan 4. Even if the first coil assembly 21 and the third coil assembly 23 radiate heat to the second coil assembly 22, the second coil assembly 22 dissipates heat more evenly and has a better heat dissipation effect due to the way the fans act on both sides of the second coil assembly 22 compared to the way the fans act on one side of the first coil assembly 21 and the third coil assembly 23, thus overcoming the influence of heat radiation and further making the temperature of the first coil assembly 21, the second coil assembly 22, and the third coil assembly 23 more uniform.

[0079] In one exemplary embodiment, the first end 31 and the second end 41 are symmetrically arranged relative to the first surface 5.

[0080] In one exemplary embodiment, the housing 1 is provided with two air inlet ducts 18, which are respectively connected to the air inlet ends of the first fan 3 and the second fan 4. 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. Therefore, the air inlet duct 18 contains low-temperature gas, while the outside contains high-temperature gas. The air inlet duct 18 is fixed with a radiator or has ribs 181 protruding into it to increase the heat exchange area and further reduce the temperature outside the air inlet duct 18. At the same time, since the air velocity inside the air inlet duct 18 is relatively weak and the internal airflow is mostly laminar (poor heat exchange effect), the ribs 181 protruding into the air inlet duct 18 can further turbulent the airflow and enhance heat exchange. In addition, the ribs 181 can also increase the strength of the air inlet duct 18.

[0081] In one exemplary embodiment, when the reactor heat dissipation device is used outdoors, sand and dust tend to accumulate around it, and the ground temperature is high due to sunlight. The first air outlet 112 is located at the lower end of the housing 1, which helps to disperse the surrounding sand and dust. The first air inlet 111 is located above the first air outlet 112, further away from the ground, making it less likely to draw in sand and dust. In addition, the upper air temperature is lower, ensuring that the temperature of the first air inlet 111 is lower.

[0082] In one exemplary embodiment, a photovoltaic inverter includes the aforementioned reactor heat dissipation device. The housing 1 is provided with an air inlet and an air outlet for heat exchange. The air inlet and air outlet are isolated to prevent hot air from flowing back to the air inlet and affecting heat dissipation. The air inlet and air outlet may include the first air inlet 111 and the first air outlet 112 as referred to in Scheme Six, and may also include air inlets and air outlets with heat exchange functions at other locations on the photovoltaic inverter.

[0083] In one exemplary embodiment, the air inlet and air outlet are not located on the same wall of the housing 1, thereby preventing hot air backflow.

[0084] In one exemplary embodiment, the air inlet and the air outlet are located on the same wall of the housing 1, and the air inlet and the air outlet are located in the middle and lower part of the housing 1, or the upper and lower part of the housing 1, respectively. By increasing the distance between the air inlet and the air outlet, hot air backflow is prevented.

[0085] In one exemplary embodiment, the air inlet and the air outlet are located on the same wall of the housing 1, and the air inlet path does not coincide with the air outlet path. By changing the air inlet direction and the air outlet direction, hot air backflow is prevented.

[0086] In one exemplary embodiment, the air inlet is located in the middle or upper part of the housing 1 to ensure that the temperature of the air inlet is low and to reduce the intake of air from the ground that is heated by sunlight.

[0087] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A reactor heat dissipation device, characterized in that: include Shell (1); The number of coil assemblies is three, and the first coil assembly (21), the second coil assembly (22) and the third coil assembly (23) are arranged sequentially along the first horizontal direction (6) and have the same specifications. A fan assembly is installed on the housing (1) and located above each of the coil assemblies, with its air inlet or air outlet area corresponding to each of the coil assemblies; The fan assembly includes a first fan (3) and a second fan (4). The first fan (3) is provided with a first end (31), which is the air inlet or air outlet of the first fan (3). The first end (31) corresponds to the first coil assembly (21) and the second coil assembly (22), and the area of ​​the first end (31) corresponding to the first coil assembly (21) is twice the area corresponding to the second coil assembly (22). The second fan (4) is provided with a second end (41), which is the air inlet or air outlet of the second fan (4). The second end (41) corresponds to the second coil assembly (22) and the third coil assembly (23), and the area of ​​the second end (41) corresponding to the third coil assembly (23) is twice the area corresponding to the second coil assembly (22). The area of ​​the second end (41) corresponding to the second coil assembly (22) is equal to the area of ​​the first end (31) corresponding to the second coil assembly (22).

2. The reactor heat dissipation device as described in claim 1, characterized in that: The first end (31) and the second end (41) are located on both sides of the first surface (5), the first surface (5) is perpendicular to the first direction (6), and the first coil assembly (21) and the third coil assembly (23) are equidistant from the first surface (5).

3. The reactor heat dissipation device as described in claim 2, characterized in that: The first end (31) and the second end (41) are symmetrically arranged relative to the first surface (5).

4. The reactor heat dissipation device as described in claim 1, characterized in that: The housing (1) is provided with an air inlet duct (18). There are two air inlet ducts (18), which are respectively connected to the air inlet ends of the first fan (3) and the second fan (4). 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 air inlet duct (18) is fixed with a radiator or has rollers (181) protruding into the air inlet duct (18).

5. The reactor heat dissipation device as described in claim 1, characterized in that: The housing (1) is provided with a first air inlet (111) and a first air outlet (112). The first air inlet (111) and the first air outlet (112) are used for heat dissipation air intake and heat dissipation air exhaust of the coil assembly. The first air outlet (112) is located at the lower end of the housing (1), and the first air inlet (111) is located above the first air outlet (112).

6. A photovoltaic inverter, characterized in that, The reactor heat dissipation device as described in any one of claims 1-5 is provided with an air inlet and an air outlet for heat exchange, and the air inlet and the air outlet are isolated from each other.

7. A photovoltaic inverter as described in claim 6, characterized in that: The air inlet and the air outlet are not located on the same wall of the housing (1); or the air inlet and the air outlet are located on the same wall of the housing (1), with the air inlet and the air outlet located in the middle and lower part of the housing (1), or the upper and lower part of the housing (1); or the air inlet and the air outlet are located on the same wall of the housing (1), with the air inlet path and the air outlet path not overlapping.

8. A photovoltaic inverter as described in claim 6, characterized in that... The air inlet is located in the middle or upper part of the housing (1).

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