Harmonic protection device for electric energy management

Abstract

The invention relates to the technical field of electric energy management, in particular to a harmonic protection device for electric energy management. The first fan and the second fan are started, external air is blown into the heat exchange pipe by the first fan, and the air is subjected to heat exchange and cooling through the first heat exchange fins in the heat exchange pipe, then enters the air inlet pipe and finally enters the box body, so that the air with lower temperature enters the box body to cool and dissipate heat of electrical elements in the box body; the temperature inside the box body is prevented from being too high; hot air rises due to heat generated in the box body and then is exhausted through the air outlet, so that a complete air flow cycle is formed; under the action of the second draught fan, outside air enters the protective cover from the ventilation holes, the air in the protective cover exchanges heat with the first heat exchange fins connected to the heat exchange pipes, so that the temperature of the air in the heat exchange pipes is reduced, hot air in the protective cover is exhausted through the second draught fan, and then another complete air flowing circulation is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of power energy management, and particularly relates to a harmonic protection device for power energy management. Background Art

[0002] In an AC power supply system, a power supply device containing a large amount of harmonics can be equivalent to a linear load and a series of harmonic current sources. A non-linear load connected to the AC power supply draws fundamental current from the AC power supply and feeds back harmonic currents of various frequencies to the AC power supply. The larger the harmonic current value and the internal resistance of the power supply, the greater the distortion of the voltage waveform caused by the harmonics, and the greater the harm; harmonics will not only reduce the power quality, but also cause phenomena such as vibration, overheating and noise in electrical equipment; harmonics require a harmonic management device to manage them.

[0003] Existing harmonic management devices contain a large number of electrical components, which will generate a large amount of heat during operation. If the heat cannot be discharged in time, it will damage the electrical components in the harmonic management device. Therefore, there is an urgent need for a harmonic management device with stronger heat dissipation ability at present. Summary of the Invention

[0004] The main object of the present invention is to provide a harmonic protection device for power energy management, aiming to solve the problem that there is an urgent need for a harmonic management device with stronger heat dissipation ability at present.

[0005] To achieve the above object, the technical solution proposed by the present invention is:

[0006] A harmonic protection device for power management, comprising a box body, a protective cover, a first fan, a heat exchange tube, an air inlet pipe and a second fan; a harmonic management device is arranged inside the box body; the box body comprises a first side plate and a second side plate which are opposite to each other and are both vertically arranged; an air outlet is arranged at the upper part of the first side plate; an air inlet is arranged at the lower part of the second side plate; the protective cover is detachably connected to the outer wall of the second side plate; the heat exchange tube is arranged in the protective cover; the protective cover comprises a first cover plate and a second cover plate which are opposite to each other and parallel, and a third cover plate respectively vertically connected to the first cover plate and the second cover plate; the second cover plate is below the first cover plate; one end of the heat exchange tube penetrates through the second cover plate and extends downward out of the protective cover, and the first fan is embedded at the end of the heat exchange tube extending downward out of the protective cover; the other end of the heat exchange tube communicates with the air inlet pipe; the air inlet pipe is connected to the inner wall of the first cover plate; the air inlet pipe extends out of the protective cover; the end of the air inlet pipe far away from the heat exchange tube can penetrate through the air inlet and extend into the box body; the first fan is used for blowing outside air into the heat exchange tube; a plurality of first heat exchange fins are arranged on the outer wall of the heat exchange tube; a plurality of ventilation holes are arranged on the first cover plate; the second fan is embedded in the third cover plate, and the second fan is used for blowing the air in the protective cover to the outside.

[0007] Preferably, it further comprises second heat exchange fins; the second heat exchange fins penetrate through the heat exchange tube; the number of the second heat exchange fins is multiple; the cross section of the heat exchange tube is rectangular; the heat exchange tube comprises a first tube plate, a second tube plate, a third tube plate and a fourth tube plate which are sequentially connected end to end; the first tube plate and the third tube plate are parallel to each other and directly opposite, and the second tube plate and the fourth tube plate are parallel to each other and directly opposite; the heat exchange tube is a metal tube; both the first heat exchange fins and the second heat exchange fins are metal fins.

[0008] Preferably, the second heat exchange fins penetrate through the first tube plate and the third tube plate, and the second heat exchange fins are parallel to each other; the second heat exchange fins are equally spaced; one end of the second heat exchange fin extends out of the first tube plate, and the other end of the second heat exchange fin extends out of the third tube plate; a plurality of the first heat exchange fins are vertically connected to the outer wall of the second tube plate; a plurality of the first heat exchange fins are vertically connected to the outer wall of the fourth tube plate; the first heat exchange fins are perpendicular to the second heat exchange fins.

[0009] Preferably, it further includes a semiconductor refrigeration sheet and a storage battery; the number of the semiconductor refrigeration sheets is multiple; the semiconductor refrigeration sheets are arranged in the heat exchange tube; the heat dissipation surface of the semiconductor refrigeration sheet is attached to the second heat exchange fin, and the heat absorption surface of the semiconductor refrigeration sheet faces away from the second heat exchange fin; two of the semiconductor refrigeration sheets are attached to the same second heat exchange fin; the storage battery is arranged in the protective cover for supplying power to the semiconductor refrigeration sheet.

[0010] Preferably, the first heat exchange fin, the second heat exchange fin, the first tube sheet, the second tube sheet, the third tube sheet and the fourth tube sheet are all perpendicular to the second cover plate; the air inlet pipe is close to the first cover plate; the air inlet pipe is connected to the inner wall of the first cover plate through a connecting column; the air inlet pipe is a circular pipe; the central axis of the air inlet pipe is parallel to the first cover plate.

[0011] Preferably, the protective cover further includes a fourth cover plate opposite to the third cover plate; the fourth cover plate is perpendicular to the first cover plate and the second cover plate respectively; the air inlet pipe passes through the fourth cover plate, and the central axis of the air inlet pipe is perpendicular to the fourth cover plate; one end of the air inlet pipe far from the heat exchange tube extends out of the protective cover.

[0012] Preferably, it further includes a support arm, a fixing bolt and a locking component; the support arm is arranged on the outer wall of the second side plate and is horizontally arranged; the support arm is lower than the air inlet; the support arm is used to abut against the outer wall of the second cover plate to support the protective cover; a connecting arm is arranged on the outer wall of the second cover plate; a plurality of through holes are formed in the connecting arm; a plurality of threaded holes are formed in the support arm; the through holes and the threaded holes correspond one by one; the fixing bolt is used to pass through the through hole and be screwed into the corresponding threaded hole; the fourth cover plate extends upward out of the first cover plate; the outer wall of the fourth cover plate is used to be attached and abutted against the outer wall of the second side plate; the locking component is arranged on the outer wall of the second side plate to fix and abut the fourth cover plate against the outer wall of the second side plate.

[0013] Preferably, the locking member includes a first connecting seat, a second connecting seat, a first locking plate, a second locking plate, a connecting rod and a connecting plate; the first connecting seat and the second connecting seat are both arranged on the outer wall of the second side plate; the first connecting seat and the second connecting seat are at the same height; the first locking plate is vertically slidably penetrated through the first connecting seat, and the second locking plate is vertically slidably penetrated through the second connecting seat; the first locking plate and the second locking plate are both parallel to the second side plate; the first locking plate and the second locking plate are in the same vertical plane; two ends of the connecting rod are respectively connected to the first locking plate and the second locking plate; the connecting plate is connected to the middle of the connecting rod; the connecting plate is parallel to the second side plate; the connecting plate is between the first connecting seat and the second connecting seat; a pull rod is arranged on a side of the connecting plate facing away from the second side plate; the first locking plate and the second locking plate are used for fitting and abutting against the fourth cover plate to abut the fourth cover plate against the second side plate; a first stopper for abutting against the first connecting seat is arranged at the top of the first locking plate, and a second stopper for abutting against the second connecting seat is arranged at the top of the second locking plate.

[0014] Preferably, it further includes a shielding plate; the shielding plate is connected to the outer wall of the first cover plate and is parallel to the first cover plate; the shielding plate is used for shielding the ventilation holes; the second fan is close to the second cover plate.

[0015] Preferably, it further includes a third fan and an air outlet pipe; the air outlet pipe is communicated with the air outlet; the air outlet pipe is a U-shaped elbow pipe; the outlet end of the air outlet pipe is vertically downward; the third fan is arranged in the box body and is directly opposite to the air outlet.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] The harmonic protection device for power quality governance proposed by the present invention has stronger heat dissipation ability; during specific use, the first fan and the second fan are started, and the outside air is blown into the heat exchange tube by the first fan. The air exchanges heat and cools down through the first heat exchange fins in the heat exchange tube, then enters the air inlet pipe, and finally enters the box body, so that the air with a lower temperature enters the box body to cool and dissipate heat the electrical components inside the box body, preventing the temperature inside the box body from being too high; the hot air in the box body rises due to the generated heat and is then discharged through the air outlet, thus forming a complete air flow cycle; under the action of the second fan, the outside air enters the protective cover through the ventilation holes, and the air in the protective cover exchanges heat with the first heat exchange fins connected to the heat exchange tube, thereby reducing the temperature of the air in the heat exchange tube. The hot air in the protective cover is discharged by the second fan, thus forming another complete air flow cycle, ensuring the heat dissipation and cooling ability of the harmonic protection device for power quality governance. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 FIG. is a schematic structural diagram of an embodiment of a harmonic protection device for power energy management proposed by the present invention;

[0020] Figure 2 For Figure 1 a detailed enlarged view of part A in

[0021] Figure 3 FIG. is a partial structural diagram of an embodiment of a harmonic protection device for power energy management proposed by the present invention;

[0022] Figure 4 FIG. is a cross-sectional view of a heat exchange tube of an embodiment of a harmonic protection device for power energy management proposed by the present invention.

[0023] Description of the Reference Numerals:

[0024] 110, box body; 120, first side plate; 130, second side plate; 140, air outlet pipe; 150, protective cover; 160, baffle; 170, heat exchange tube; 180, support arm; 190, locking member; 210, air inlet pipe; 220, air inlet; 230, first cover plate; 240, ventilation hole; 250, second fan; 260, second cover plate; 270, third cover plate; 280, fourth cover plate; 290, first heat exchange fin; 310, second heat exchange fin; 320, first fan; 330, connecting arm; 340, fixing bolt; 350, first connection seat; 360, first locking plate; 370, second connection seat; 380, second locking plate; 390, connecting rod; 410, connecting plate; 420, pull rod; 430, first tube plate; 440, second tube plate; 450, third tube plate; 460, fourth tube plate; 470, semiconductor refrigeration sheet; 480, first stop block; 490, second stop block; 510, third heat exchange fin.

[0025] The realization of the objectives, functional features, and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "connected", "fixed", etc. shall be understood in a broad sense. For example, "fixed" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0031] The present invention provides a harmonic protection device for power energy management.

[0032] As shown in the attached Figure 1 - attached Figure 4As shown in the figure, in an embodiment of a harmonic protection device for power management proposed by the present invention, the harmonic protection device for power management includes a box body 110, a protective cover 150, a first fan 320, a heat exchange tube 170, an air inlet pipe 210, and a second fan 250; a harmonic management device (not shown, mainly including a harmonic filter, a harmonic isolator, an LC passive filter device, an active power filter, and a unified power quality controller, which are prior arts and will not be elaborated here) is arranged in the box body 110; the box body 110 includes a first side plate 120 and a second side plate 130 that are opposite to each other and are both vertically arranged; an air outlet (not shown) is provided at the upper part of the first side plate 120, and a dust filter grille (not shown) is arranged in the air outlet; an air inlet 220 (the air inlet 220 is a circular opening) is provided at the lower part of the second side plate 130; the protective cover 150 is detachably connected to the outer wall of the second side plate 130; the heat exchange tube 170 is arranged in the protective cover 150; the protective cover 150 includes a first cover plate 230 and a second cover plate 260 that are opposite to each other and parallel, and a third cover plate 270 that is vertically connected to the first cover plate 230 and the second cover plate 260 respectively; the second cover plate 260 is located below the first cover plate 230; one end of the heat exchange tube 170 penetrates through the second cover plate 260 and extends downward out of the protective cover 150, and a first fan 320 is embedded at the end of the heat exchange tube 170 that extends downward out of the protective cover 150; the other end of the heat exchange tube 170 communicates with the air inlet pipe 210; the air inlet pipe 210 is connected to the inner wall of the first cover plate 230; the air inlet pipe 210 extends out of the protective cover 150; the end of the air inlet pipe 210 away from the heat exchange tube 170 can penetrate through the air inlet 220 and extend into the box body 110; the first fan 320 is used to blow external air into the heat exchange tube 170; a plurality of first heat exchange fins 290 are arranged on the outer wall of the heat exchange tube 170; a plurality of ventilation holes 240 are provided on the first cover plate 230; the third cover plate 270 is embedded with a second fan 250, and the second fan 250 is used to blow the air in the protective cover 150 to the outside.

[0033] The harmonic protection device for power management proposed by the present invention has stronger heat dissipation capacity; during specific use, the first fan 320 and the second fan 250 are started, and the outside air is blown into the heat exchange tube 170 by the first fan 320. The air exchanges heat and cools down through the first heat exchange fins 290 in the heat exchange tube 170, and then enters the air inlet pipe 210 and finally enters the box body 110, so that the air with a lower temperature enters the box body 110 to cool down and dissipate heat from the electrical components inside the box body 110, preventing the temperature inside the box body 110 from being too high; the hot air in the box body 110 rises due to the generated heat and then is discharged through the air outlet, thus forming a complete air flow cycle; under the action of the second fan 250, the outside air enters the protective cover 150 from the ventilation holes 240, and the air in the protective cover 150 exchanges heat with the first heat exchange fins 290 connected to the heat exchange tube 170, thereby reducing the temperature of the air in the heat exchange tube 170. The hot air in the protective cover 150 is discharged through the second fan 250, thus forming another complete air flow cycle, ensuring the heat dissipation and cooling capacity of the harmonic protection device for power management.

[0034] In addition, the harmonic protection device for power management of the present invention further includes second heat exchange fins 310; the second heat exchange fins 310 are disposed through the heat exchange tube 170; the number of the second heat exchange fins 310 is multiple; the cross-section of the heat exchange tube 170 is rectangular; the heat exchange tube 170 includes a first tube plate 430, a second tube plate 440, a third tube plate 450 and a fourth tube plate 460 that are sequentially connected end to end; the first tube plate 430 and the third tube plate 450 are parallel to each other and directly opposite, and the second tube plate 440 and the fourth tube plate 460 are parallel to each other and directly opposite; the heat exchange tube 170 is a metal tube; both the first heat exchange fins 290 and the second heat exchange fins 310 are metal fins.

[0035] Meanwhile, the second heat exchange fins 310 are disposed through the first tube plate 430 and the third tube plate 450, and the second heat exchange fins 310 are parallel to each other; the second heat exchange fins 310 are equally spaced; one end of the second heat exchange fins 310 extends out of the first tube plate 430, and the other end of the second heat exchange fins 310 extends out of the third tube plate 450; a plurality of first heat exchange fins 290 are perpendicularly connected to the outer wall of the second tube plate 440; a plurality of first heat exchange fins 290 are perpendicularly connected to the outer wall of the fourth tube plate 460; the first heat exchange fins 290 are perpendicular to the second heat exchange fins 310. By providing the first heat exchange fins 290 and the second heat exchange fins 310, the heat exchange and cooling capacity of the air can be further improved.

[0036] In addition, the harmonic protection device for power management further includes a plurality of semiconductor refrigerating chips 470 and a storage battery (not shown); the semiconductor refrigerating chips 470 are arranged in the heat exchange tube 170; the heat dissipation surface of the semiconductor refrigerating chip 470 is attached to the second heat exchange fin 310, and the heat absorption surface of the semiconductor refrigerating chip 470 faces away from the second heat exchange fin 310; two semiconductor refrigerating chips 470 are attached to the same second heat exchange fin 310; the storage battery is arranged in the protective cover 150 for supplying power to the semiconductor refrigerating chips 470. By arranging the semiconductor refrigerating chips 470, the heat of the air flowing in the heat exchange tube 170 can be absorbed and conducted to the second heat exchange fin 310, greatly improving the heat exchange efficiency and further enhancing the air cooling capacity.

[0037] Meanwhile, the first heat exchange fin 290, the second heat exchange fin 310, the first tube sheet 430, the second tube sheet 440, the third tube sheet 450 and the fourth tube sheet 460 are all perpendicular to the second cover plate 260; the air inlet pipe 210 is close to the first cover plate 230; the air inlet pipe 210 is connected to the inner wall of the first cover plate 230 through a connecting column; the air inlet pipe 210 is a circular pipe; the central axis of the air inlet pipe 210 is parallel to the first cover plate 230. The protective cover 150 further includes a fourth cover plate 280 opposite to the third cover plate 270; the fourth cover plate 280 is perpendicular to the first cover plate 230 and the second cover plate 260 respectively; the air inlet pipe 210 passes through the fourth cover plate 280, and the central axis of the air inlet pipe 210 is perpendicular to the fourth cover plate 280; one end of the air inlet pipe 210 far from the heat exchange tube 170 extends out of the protective cover 150. Through the above technical solutions, the structure and function of the harmonic protection device for power management are further improved.

[0038] In addition, the harmonic protection device for power management also includes a support arm 180, a fixing bolt 340 and a locking component 190; the support arm 180 is arranged on the outer wall of the second side plate 130, and the support arm 180 is arranged horizontally; the support arm 180 is lower than the air inlet 220; the support arm 180 is used to abut the outer wall of the second cover plate 260 to support the protective cover 150; the outer wall of the second cover plate 260 is provided with a connecting arm 330; the connecting arm 330 has a plurality of passages The support arm 180 is provided with a plurality of threaded holes (unnumbered); the through holes and the threaded holes correspond to each other one by one; the fixing bolts 340 are used to pass through the through holes and screwed into the corresponding threaded holes; the fourth cover plate 280 extends upward from the first cover plate 230; the outer wall of the fourth cover plate 280 is used to fit against the outer wall of the second side plate 130; the locking member 190 is provided on the outer wall of the second side plate 130 to fix the fourth cover plate 280 against the outer wall of the second side plate 130. When installing the protective cover 150, it is only necessary to fit the bottom of the protective cover 150 against the support arm 180, fit the fourth cover plate 280 against the outer wall of the second side plate 130, and then fix the fixing bolts 340 into the threaded holes to fix the bottom of the protective cover 150.

[0039] At the same time, the locking component 190 includes a first connecting seat 350, a second connecting seat 370, a first locking plate 360, a second locking plate 380, a connecting rod 390 and a connecting plate 410; the first connecting seat 350 and the second connecting seat 370 are both arranged on the outer wall of the second side plate 130; the first connecting seat 350 and the second connecting seat 370 are at the same height; the first locking plate 360 ​​is vertically slidably penetrated through the first connecting seat 350, and the second locking plate 380 is vertically slidably penetrated through the second connecting seat 370; the first locking plate 360 ​​and the second locking plate 380 are both parallel to the second side plate 130; the first locking plate 360 ​​and the second locking plate 380 are in the same vertical plane; the two ends of the connecting rod 390 are respectively connected to the first locking plate 360 ​​and the second locking plate 380; the connecting plate 410 is connected to the connecting rod 390 Middle part; the connecting plate 410 is parallel to the second side plate 130; the connecting plate 410 is between the first connecting seat 350 and the second connecting seat 370; a pull rod 420 is provided on the side of the connecting plate 410 facing away from the second side plate 130; the first locking plate 360 ​​and the second locking plate 380 are used to fit and abut against the fourth cover plate 280 to abut the fourth cover plate 280 against the second side plate 130; the top of the first locking plate 360 ​​is provided with a first stopper 480 for abutting against the first connecting seat 350, and the top of the second locking plate 380 is provided with a second stopper 490 for abutting against the second connecting seat 370, the distance between the first locking plate 360 ​​and the second side plate 130 is equal to the thickness of the fourth cover plate 280, and the distance between the second locking plate 380 and the second side plate 130 is equal to the thickness of the fourth cover plate 280.

[0040] Through the above technical solution, the structure and function of the locking component 190 are improved. When it is necessary to lock the fourth cover plate 280, hold the pull rod 420 and pull it downward, thereby synchronously driving the first locking plate 360 and the second locking plate 380 to move downward, so that the first locking plate 360 and the second locking plate 380 abut against the outer wall of the fourth cover plate 280, and press the fourth cover plate 280 tightly against the outer wall of the second side plate 130, thereby improving the connection stability between the protective cover 150 and the box body 110.

[0041] In addition, the harmonic protection device for power management further includes a baffle plate 160; the baffle plate 160 is connected to the outer wall of the first cover plate 230, and the baffle plate 160 is parallel to the first cover plate 230; the baffle plate 160 is used to block the ventilation hole 240; the second fan 250 is close to the second cover plate 260; a third heat exchange fin 510 is further connected to the outer wall of the air inlet pipe 210; the third heat exchange fin 510 is a metal fin; the air inlet pipe 210 is a metal pipe. At the same time, the harmonic protection device for power management further includes a third fan and an air outlet pipe 140; the air outlet pipe 140 communicates with the air outlet; the air outlet pipe 140 is a U-shaped elbow; the outlet end of the air outlet pipe 140 is vertically downward; the third fan is arranged in the box body 110 and faces the air outlet.

[0042] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields are all included in the patent protection scope of the present invention.

Claims

1. A harmonic protection device for electric energy management, characterized in that: The invention comprises a box body, a protective cover, a first fan, a heat exchange tube, an air inlet tube and a second fan; a harmonic control device is arranged in the box body; the box body comprises a first side plate and a second side plate which are opposite to each other and are both arranged vertically; an air outlet is provided at the upper part of the first side plate; an air inlet is provided at the lower part of the second side plate; the protective cover is detachably connected to the outer wall of the second side plate; the heat exchange tube is arranged on the protective cover; the protective cover comprises a first cover plate and a second cover plate which are opposite to each other and parallel, and a third cover plate which are respectively vertically connected to the first cover plate and the second cover plate; the second cover plate is located below the first cover plate; one end of the heat exchange tube is passed through the The second cover plate extends downward from the protective cover, and the first fan is embedded in one end of the heat exchange tube extending downward from the protective cover; the other end of the heat exchange tube is connected to the air inlet pipe; the air inlet pipe is connected to the inner wall of the first cover plate; the air inlet pipe extends out of the protective cover; the end of the air inlet pipe away from the heat exchange tube can be penetrated by the air inlet and extend into the box body; the first fan is used to blow outside air into the heat exchange tube; the outer wall of the heat exchange tube is provided with a plurality of first heat exchange fins; the first cover plate is provided with a plurality of ventilation holes; the third cover plate is embedded with the second fan, and the second fan is used to blow the air in the protective cover to the outside.

2. A harmonic protection device for electric energy management according to claim 1, characterized in that: It also includes a second heat exchange fin; the second heat exchange fin is passed through the heat exchange tube; the number of the second heat exchange fin is multiple; the cross-section of the heat exchange tube is rectangular; the heat exchange tube includes a first tube sheet, a second tube sheet, a third tube sheet and a fourth tube sheet connected end to end in sequence; the first tube sheet and the third tube sheet are parallel to and directly opposite to each other, and the second tube sheet and the fourth tube sheet are parallel to and directly opposite to each other; the heat exchange tube is a metal tube; the first heat exchange fin and the second heat exchange fin are both metal fins.

3. A harmonic protection device for electric energy management according to claim 2, characterized in that: The second heat exchange fins are arranged through the first tube sheet and the third tube sheet, and the second heat exchange fins are parallel to each other; the second heat exchange fins are distributed at equal intervals; one end of the second heat exchange fin extends out of the first tube sheet, and the other end of the second heat exchange fin extends out of the third tube sheet; a plurality of the first heat exchange fins are vertically connected to the outer wall of the second tube sheet; a plurality of the first heat exchange fins are vertically connected to the outer wall of the fourth tube sheet; the first heat exchange fins are perpendicular to the second heat exchange fins.

4. A harmonic protection device for electric energy management according to claim 3, characterized in that: It also includes a semiconductor refrigeration sheet and a battery; there are multiple semiconductor refrigeration sheets; the semiconductor refrigeration sheets are arranged in the heat exchange tube; the heat dissipation surface of the semiconductor refrigeration sheet is attached to the second heat exchange fin, and the heat absorption surface of the semiconductor refrigeration sheet is away from the second heat exchange fin; two semiconductor refrigeration sheets are attached to the same second heat exchange fin; the battery is arranged in the protective cover to supply power to the semiconductor refrigeration sheet.

5. A harmonic protection device for electric energy management according to claim 2, characterized in that: The first heat exchange fin, the second heat exchange fin, the first tube sheet, the second tube sheet, the third tube sheet and the fourth tube sheet are all perpendicular to the second cover plate; the air inlet pipe is close to the first cover plate; the air inlet pipe is connected to the inner wall of the first cover plate through a connecting column; the air inlet pipe is a circular tube; the central axis of the air inlet pipe is parallel to the first cover plate.

6. A harmonic protection device for electric energy management according to claim 5, characterized in that: The protective cover also includes a fourth cover plate opposite to the third cover plate; the fourth cover plate is perpendicular to the first cover plate and the second cover plate respectively; the air inlet pipe is passed through the fourth cover plate, and the central axis of the air inlet pipe is perpendicular to the fourth cover plate; one end of the air inlet pipe away from the heat exchange tube extends out of the protective cover.

7. A harmonic protection device for electric energy management according to claim 6, characterized in that: It also includes a support arm, a fixing bolt and a locking component; the support arm is arranged on the outer wall of the second side panel, and the support arm is arranged horizontally; the support arm is lower than the air inlet; the support arm is used to abut the outer wall of the second cover plate to support the protective cover; the outer wall of the second cover plate is provided with a connecting arm; the connecting arm is provided with a plurality of through holes; the support arm is provided with a plurality of threaded holes; the through holes and the threaded holes correspond one to one; the fixing bolt is used to pass through the through holes and be screwed into the corresponding threaded holes; the fourth cover plate extends upward from the first cover plate; the outer wall of the fourth cover plate is used to fit and abut against the outer wall of the second side plate; the locking component is arranged on the outer wall of the second side plate to fix the fourth cover plate against the outer wall of the second side plate.

8. A harmonic protection device for electric energy management according to claim 7, characterized in that: The locking component includes a first connecting seat, a second connecting seat, a first locking plate, a second locking plate, a connecting rod and a connecting plate; the first connecting seat and the second connecting seat are both arranged on the outer wall of the second side plate; the first connecting seat and the second connecting seat are at the same height; the first locking plate is vertically slidably penetrated through the first connecting seat, and the second locking plate is vertically slidably penetrated through the second connecting seat; the first locking plate and the second locking plate are both parallel to the second side plate; the first locking plate and the second locking plate are in the same vertical plane; the two ends of the connecting rod are respectively connected to the first A locking plate and a second locking plate; the connecting plate is connected to the middle part of the connecting rod; the connecting plate is parallel to the second side plate; the connecting plate is between the first connecting seat and the second connecting seat; a pull rod is provided on the side of the connecting plate facing away from the second side plate; the first locking plate and the second locking plate are used to fit and abut against the fourth cover plate to abut the fourth cover plate against the second side plate; a first stop block for abutting against the first connecting seat is provided at the top of the first locking plate, and a second stop block for abutting against the second connecting seat is provided at the top of the second locking plate.

9. A harmonic protection device for electric energy management according to claim 1, characterized in that: It also includes a shielding plate; the shielding plate is connected to the outer wall of the first cover plate, and the shielding plate is parallel to the first cover plate; the shielding plate is used to shield the ventilation hole; the second fan is close to the second cover plate.

10. A harmonic protection device for electric energy management according to claim 1, characterized in that: It also includes a third fan and an air outlet pipe; the air outlet pipe is connected to the air outlet; the air outlet pipe is a U-shaped bent pipe; the outlet end of the air outlet pipe is vertically downward; the third fan is arranged in the box body and directly faces the air outlet.

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