WO2025011301A1 - Variable frequency drive with natural heat dissipation - Google Patents

Abstract

A variable frequency drive with natural heat dissipation, comprising a housing and a front cover, wherein a mounting pad is fixedly mounted in the housing, and a varistor, a rectifier module, a filter, and an inverter module are mounted in sequence on the mounting pad; an air intake cavity is provided in the mounting pad; exhaust holes are provided between the air intake cavity and the top of the mounting pad; air inducing cavities are provided inside both sides of the housing; a through groove is provided between the air intake cavity and each air inducing cavity; and an air inlet is provided between each air inducing cavity and the outer wall of the housing. Natural heat dissipation is achieved within the variable frequency drive through multiple aspects, such as optimizing the design of an air duct, enhancing the heat conduction effect and heat conduction efficiency, and improving the internal environment. By means of a local heat-absorbing assembly, when localized overheating occurs within the variable frequency drive, heat generated by an automatic local component can be rapidly absorbed, thereby providing effective protection for the internal structure.

Description

A natural heat dissipation inverter Technical Field

The invention relates to a natural heat dissipation frequency converter, belonging to the technical field of frequency converters.

Background Art

The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. It is mainly composed of rectification, filtering, inversion, braking unit, drive unit, detection unit, microprocessor unit, etc. The frequency converter has many protection functions, such as overcurrent, overvoltage, overload protection, etc. The heat dissipation of the frequency converter has always been a huge problem when the frequency converter is used. Ordinary heat dissipation methods often use active heat dissipation structures such as cooling fans to complete the heat dissipation. Not only is the heat dissipation effect general, but the heat dissipation used will eventually generate heat. Therefore, it does not meet the purpose of energy conservation and emission reduction, and it is easy to cause damage to internal components when local overheating occurs.

Utility Model Content

The purpose of the present invention is to provide a natural heat dissipation inverter in order to solve the above-mentioned problems. Natural heat dissipation inside the inverter is achieved by optimizing the air duct design, enhancing the thermal conductivity and efficiency, and improving the internal environment, so as to achieve good heat dissipation effect and energy saving and emission reduction. The local heat absorption component can quickly absorb the heat generated by the local components when overheating occurs locally in the inverter, thereby effectively protecting the internal structure.

The present invention achieves the above-mentioned purpose through the following technical scheme: a natural heat dissipation inverter, comprising a casing and a front cover, a mounting pad is fixedly installed in the casing, a varistor, a rectifier module, a filter and an inverter module are installed on the mounting pad in sequence, an air inlet cavity is opened in the mounting pad, an exhaust hole is opened between the air inlet cavity and the top of the mounting pad, air induced cavities are opened inside both sides of the casing, a through groove is opened between the air inlet cavity and the air induced cavities, an air inlet is opened between the air induced cavities and the outer wall of the casing, a mounting groove is opened on the mounting pad, a heat conducting plate is installed in the mounting groove, heat conducting fins are welded on both sides of the heat conducting plate, the heat conducting fins are arranged on both sides of the inner wall of the casing, heat dissipation components are arranged inside both sides of the casing, a heat sink group is installed on the rear side of the mounting pad, a placement groove is opened on the rear side of the casing, and the heat sink group is clamped in the placement groove.

Furthermore, rotating rods are installed on both sides of the inner wall of the air induction chamber through bearings, and blades are installed on the rotating rods.

Furthermore, the heat dissipation assembly includes a conductive sheet, a metal plate and a heat dissipation block, wherein the conductive sheet and the heat dissipation block are The conductive sheet, the metal plate and the heat sink are respectively welded on both sides of the metal plate, and a receiving cavity is opened inside both sides of the housing, and a card slot and a heat dissipation groove are respectively opened on both sides of the receiving cavity, and the conductive sheet, the metal plate and the heat dissipation block are respectively clamped in the card slot, the receiving cavity and the heat dissipation groove.

Furthermore, a liquid storage cavity is provided in the conductive sheet, the liquid storage cavity is filled with cooling liquid, and capillary wicks are provided on both sides of the inner wall of the liquid storage cavity.

Furthermore, the inner wall of the casing is coated with a graphene coating.

Furthermore, a local heat absorption component is arranged in the front cover, and the local heat absorption component includes a mounting plate, a first energy storage material, a second energy storage material, a third energy storage material, a fourth energy storage material, a first control oil cylinder, a second control oil cylinder, a third control oil cylinder and a fourth control oil cylinder. A recessed groove is opened on the rear side of the front cover, and the mounting plate is installed on the inner wall of the recessed groove. The first control oil cylinder, the second control oil cylinder, the third control oil cylinder and the fourth control oil cylinder are all arranged in the recessed groove and installed on the mounting plate. The first energy storage material, the second energy storage material, the third energy storage material and the fourth energy storage material are respectively installed at one end of the first control oil cylinder, the second control oil cylinder, the third control oil cylinder and the fourth control oil cylinder, and the first control oil cylinder, the second control oil cylinder, the third control oil cylinder and the fourth control oil cylinder correspond to the varistor, the rectifier module, the filter and the inverter module respectively.

Furthermore, a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor are installed on the mounting pad, and the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are respectively arranged on the bottom of the varistor, the rectifier module, the filter and the inverter module, and a controller is arranged on the front cover, and the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to the controller through wires, and the controller is respectively connected to one end of the first control cylinder, the second control cylinder, the third control cylinder and the fourth control cylinder through wires.

Furthermore, connecting pieces are welded on both sides of the casing, and connecting grooves are opened on both sides of the rear side of the front cover, and the connecting pieces are clamped in the connecting grooves.

Furthermore, a pressure sensor is installed on the inner wall of the connecting groove, an expansion groove is opened on the inner wall of the connecting groove, an adjusting plate is installed on the inner wall of the expansion groove through an installing spring, a placement cavity is opened in the adjusting plate, a micro-cylinder is fixedly installed in the placement cavity, a fixing pin rod is installed at one end of the micro-cylinder, a key hole is opened on one side of the connecting plate, the fixing pin rod is clamped in the key hole, the pressure sensor is connected to the controller through wires, and the controller is connected to the micro-cylinder through wires.

Technical effects and advantages of the present invention:

1. The present invention realizes natural heat dissipation inside the inverter by optimizing the air duct design, enhancing the heat conduction effect and heat conduction efficiency, and improving the internal environment, thereby achieving good heat dissipation effect and energy saving and emission reduction.

2. The present invention can quickly absorb the heat generated by local components of the inverter when overheating occurs locally through the local heat absorption component, thereby effectively protecting the internal structure.

3. The present invention can quickly and intelligently control the installation and removal of the front cover through the connection structure between the front cover and the shell, thereby facilitating rapid maintenance of the internal structure.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of the present invention;

FIG2 is a view showing the internal structure of the housing of the present invention;

FIG3 is a view showing the internal structure of the front cover of the present invention;

FIG4 is a cross-sectional view of the present invention;

FIG5 is a front perspective view of the mounting pad of the present invention;

FIG6 is a rear perspective view of the mounting plate of the present invention;

FIG7 is a cross-sectional view of a heat dissipation assembly of the present invention;

FIG. 8 is a schematic diagram of a partial structure of FIG. 4 of the present invention.

In the figure: 1, housing; 2, front cover; 3, mounting pad; 4, varistor; 5, rectifier module; 6, filter; 7, inverter module; 8, air inlet chamber; 9, exhaust hole; 10, air induction chamber; 11, air inlet; 12, heat conductive sheet; 13, heat dissipation fin; 14, heat dissipation component; 1401, conduction sheet; 1402, metal plate; 1403, heat dissipation block; 15, heat dissipation plate group; 16, rotating rod; 17, blade; 18, liquid storage chamber; 19, coolant; 20, capillary wick; 21, graphene coating; 22, local heat absorption component; 2201, mounting sheet; 2202, the first An energy storage material; 2203, a second energy storage material; 2204, a third energy storage material; 2205, a fourth energy storage material; 2206, a first control cylinder; 2207, a second control cylinder; 2208, a third control cylinder; 2209, a fourth control cylinder; 23, a first temperature sensor; 24, a second temperature sensor; 25, a third temperature sensor; 26, a fourth temperature sensor; 27, a controller; 28, a connecting piece; 29, a connecting groove; 30, a pressure sensor; 31, a mounting spring; 32, an adjusting piece; 33, a micro cylinder; 34, a fixing pin; 35, a key hole.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Embodiment 1:

The present embodiment provides a natural heat dissipation inverter, as shown in Figures 1-8, including a casing 1 and a front cover 2, a mounting pad 3 is fixedly installed in the casing 1, and a varistor 4, a rectifier module 5, a filter 6 and an inverter module 7 are installed on the mounting pad 3 in sequence, an air inlet cavity 8 is opened in the mounting pad 3, and an exhaust hole 9 is opened between the air inlet cavity 8 and the top of the mounting pad 3, air induction cavities 10 are opened inside both sides of the casing 1, a through groove is opened between the air inlet cavity 8 and the air induction cavity 10, and an air inlet 11 is opened between the air induction cavity 10 and the outer wall of the casing 1, a mounting groove is opened on the mounting pad 3, a heat conducting plate 12 is installed in the mounting groove, and heat dissipation fins 13 are welded on both sides of the heat conducting plate 12, and the heat dissipation fins 13 are arranged on both sides of the inner wall of the casing 1, a heat dissipation plate group 15 is installed on the rear side of the mounting pad 3, and a placement groove is opened on the rear side of the casing 1, and the heat dissipation plate group 15 is clamped in the placement groove.

In a specific implementation, as shown in FIG. 4 , a rotating rod 16 is installed on both sides of the inner wall of the air induction chamber 10 through bearings, a blade 17 is installed on the rotating rod 16 , and a graphene coating 21 is coated on the inner wall of the casing 1 .

In a specific implementation, as shown in FIG7 , heat dissipation components 14 are provided inside both sides of the casing 1, and the heat dissipation components 14 include a conductive sheet 1401, a metal plate 1402 and a heat dissipation block 1403, which are respectively welded on both sides of the metal plate 1402, and a receiving cavity is provided inside both sides of the casing 1, and a card slot and a heat dissipation groove are provided on both sides of the receiving cavity, respectively, and the conductive sheet 1401, the metal plate 1402 and the heat dissipation block 1403 are respectively clamped in the card slot, the receiving cavity and the heat dissipation groove, and a liquid storage cavity 18 is provided in the conductive sheet 1401, and the liquid storage cavity 18 is filled with a coolant 19, and capillary wicks 20 are provided on both sides of the inner wall of the liquid storage cavity 18.

In this embodiment, natural heat dissipation inside the inverter is achieved by optimizing the air duct design, enhancing the heat conduction effect and heat conduction efficiency, and improving the internal environment, thereby achieving good heat dissipation effect and energy saving and emission reduction. When in use, as shown in Figures 4 and 5, the outside air can enter the air inlet chamber 10 through the air inlet 11, and then enter the air inlet chamber 8 and be blown to the internal components of the inverter through the exhaust hole 9. The air duct is unobstructed, which is conducive to rapid air induction and heat dissipation. At the same time, when the air enters, the airflow can drive the rotating rod 16 and the blade 17 to rotate. When the blade 17 rotates, the airflow can be enhanced, thereby improving the heat dissipation effect. When the internal components dissipate heat, the heat can be quickly conducted through the heat conducting sheet 12 and the heat dissipation plate group 15. When the heat conducting sheet 12 conducts heat, the heat can be transferred to On the conduction sheet 1401, the temperature inside the conduction sheet 1401 accumulates and rises, so that the coolant 19 in the liquid storage chamber 18 can be heated, and the coolant 19 is expanded and vaporized, thereby pushing the coolant 19 to flow outward, and the coolant 19 at the other end can flow back to the contact end of the conduction sheet 1401 and the heat-conducting sheet 12 through the capillary wick 20, thereby driving the coolant 19 in the conduction sheet 1401 to flow, thereby transferring the heat to the metal plate 1402, and finally transferring the heat to the heat sink 1403, and the heat sink 1403 contacts the outside world, thereby quickly completing the heat dissipation. Since the inner wall of the casing 1 is coated with a graphene coating 21, it can absorb part of the heat generated inside the casing 1, thereby achieving natural heat dissipation from multiple aspects.

Embodiment 2:

The present embodiment provides a local overheating treatment structure of a natural heat dissipation inverter, as shown in FIG1-8, comprising a housing 1 and a front cover 2, wherein a local heat absorption component 22 is arranged in the front cover 2, and the local heat absorption component 22 comprises a mounting plate 2201, a first energy storage material 2202, a second energy storage material 2203, a third energy storage material 2204, a fourth energy storage material 2205, a first control oil cylinder 2206, a second control oil cylinder 2207, a third control oil cylinder 2208 and a fourth control oil cylinder 2209, a concave groove is provided on the rear side of the front cover 2, the mounting plate 2201 is installed on the inner wall of the concave groove, the first control oil cylinder 2206, the second control oil cylinder 2207, the third control oil cylinder 2208 and the fourth control oil cylinder 2209. 2207, the third control cylinder 2208 and the fourth control cylinder 2209 are all arranged in the recessed groove and installed on the mounting plate 2201, the first energy storage material 2202, the second energy storage material 2203, the third energy storage material 2204 and the fourth energy storage material 2205 are respectively installed at one end of the first control cylinder 2206, the second control cylinder 2207, the third control cylinder 2208 and the fourth control cylinder 2209, the first control cylinder 2206, the second control cylinder 2207, the third control cylinder 2208 and the fourth control cylinder 2209 correspond to the varistor 4, the rectifier module 5, the filter 6 and the inverter module 7 respectively.

In a specific implementation, as shown in Figures 4 and 5, a first temperature sensor 23, a second temperature sensor 24, a third temperature sensor 25 and a fourth temperature sensor 26 are installed on the mounting pad 3, and the first temperature sensor 23, the second temperature sensor 24, the third temperature sensor 25 and the fourth temperature sensor 26 are respectively arranged at the bottom of the varistor 4, the rectifier module 5, the filter 6 and the inverter module 7, and a controller 27 is arranged on the front cover 2, and the first temperature sensor 23, the second temperature sensor 24, the third temperature sensor 25 and the fourth temperature sensor 26 are all connected to the controller 27 through wires, and the controller 27 is respectively connected to one end of the first control cylinder 2206, the second control cylinder 2207, the third control cylinder 2208 and the fourth control cylinder 2209 through wires.

In this embodiment, the local heat absorption component 22 can quickly absorb the heat generated by the local components when overheating occurs locally in the inverter, so the internal structure can be effectively protected. Before use, an overheating temperature threshold is set in the controller 27. When the varistor 4 is overheated, the first temperature sensor 23 can detect that the temperature of the varistor 4 is higher than the set temperature threshold and transmit the temperature information to the controller 27. The controller 27 can start the first control cylinder 2206. The first control cylinder 2206 can push the first energy storage material 2202 to a position in contact with the varistor 4. The energy storage material can quickly absorb the heat generated by the varistor 4 through its characteristic of quickly absorbing heat. After the first temperature is stably reduced, The sensor 23 can transmit the temperature information to the controller 27, and the controller 27 can control the first control cylinder 2206 to drive the first energy storage material 2202 to reset. When the rectifier module 5 is overheated, the second temperature sensor 24 can detect that the temperature of the rectifier module 5 is higher than the set temperature threshold and transmit the temperature information to the controller 27. The controller 27 can start the second control cylinder 2207, and the second control cylinder 2207 can push the second energy storage material 2203 to a position in contact with the rectifier module 5. The energy storage material can quickly absorb the heat generated by the rectifier module 5 through its characteristic of quickly absorbing heat. After the heat is stably reduced, the second temperature sensor 24 can transmit the temperature information to the controller 27, and the controller 27 can control The second control cylinder 2207 drives the second energy storage material 2203 to reset. When the filter 6 is overheated, the third temperature sensor 25 can detect that the temperature of the filter 6 is higher than the set temperature threshold and transmit the temperature information to the controller 27. The controller 27 can start the third control cylinder 2208. The third control cylinder 2208 can push the third energy storage material 2204 to a position in contact with the filter 6. The heat generated by the filter 6 can be quickly absorbed by the energy storage material through its characteristic of quickly absorbing heat. After the heat is stably reduced, the third temperature sensor 25 can transmit the temperature information to the controller 27. The controller 27 can control the third control cylinder 2208 to drive the third energy storage material 2204 to a position in contact with the filter 6. The energy storage material 2204 is reset. When the inverter module 7 is overheated, the fourth temperature sensor 26 can detect that the temperature of the inverter module 7 is higher than the set temperature threshold and transmit the temperature information to the controller 27. The controller 27 can start the fourth control cylinder 2209. The fourth control cylinder 2209 can push the fourth energy storage material 2205 to a position in contact with the inverter module 7. The energy storage material can quickly absorb the heat generated by the inverter module 7 through its characteristic of quickly absorbing heat. After the heat is stably reduced, the fourth temperature sensor 26 can transmit the temperature information to the controller 27. The controller 27 can control the fourth control cylinder 2209 to drive the fourth energy storage material 2205 to reset.

Embodiment 3:

This embodiment provides an installation structure of a natural heat dissipation inverter, including a housing 1 and a front cover 2. Both sides of the housing 1 are welded with connecting pieces 28, and both sides of the rear side of the front cover 2 are provided with connecting grooves 29, and the connecting pieces 28 are clamped in the connecting grooves 29.

In a specific implementation, as shown in Figures 4 and 8, a pressure sensor 30 is installed on the inner wall of the connecting groove 29, an expansion groove is opened on the inner wall of the connecting groove 29, an adjusting plate 32 is installed on the inner wall of the expansion groove by installing a spring 31, a placement cavity is opened in the adjusting plate 32, a micro-cylinder 33 is fixedly installed in the placement cavity, a fixing pin 34 is installed at one end of the micro-cylinder 33, a key hole 35 is opened on one side of the connecting plate 28, the fixing pin 34 is clamped in the key hole 35, the pressure sensor 30 is connected to the controller 27 through wires, and the controller 27 is connected to the micro-cylinder 33 through wires.

In this embodiment, the installation and removal of the front cover 2 can be quickly and intelligently controlled through the connection structure between the front cover 2 and the shell, so that the internal structure can be quickly inspected and repaired. When in use, the connection structure between the front cover 2 and the shell is as shown in Figures 4 and 8. The fixing pin 34 is clamped in the key hole 35, so that the front cover 2 can be fixed. When the front cover 2 needs to be removed, the front cover 2 is slightly pulled outward, so that the adjustment piece 32 can be driven to squeeze the installation spring 31 and move. At this time, the connecting piece 28 does not contact the pressure sensor 30. After 5s, the pressure sensor 30 can transmit the pressure information to the controller 27. The controller 27 can control the micro-cylinder 33 to pull the fixing pin 34 to move, and the fixing pin 34 can be moved out of the key hole 35. When the fixing pin 34 is completely moved out of the key hole 35, there is no fixed connection between the front cover 2 and the shell, so that the front cover 2 can be directly disassembled. When installing again, the connecting piece 28 is inserted into the connecting groove 29, so that one end of the connecting piece 28 can contact with the pressure sensor 30, and the pressure sensor 30 can transmit the pressure information to the controller 27. Therefore, the controller 27 can control the micro-cylinder 33 to push the fixing pin 34 into the key hole 35, so that the connecting piece 28 can be fixed.

Claims (9)

A natural heat dissipation inverter, characterized in that it comprises a casing (1) and a front cover (2), wherein a mounting pad (3) is fixedly installed in the casing (1), a varistor (4), a rectifier module (5), a filter (6) and an inverter module (7) are sequentially installed on the mounting pad (3), an air inlet cavity (8) is provided in the mounting pad (3), an exhaust hole (9) is provided between the air inlet cavity (8) and the top of the mounting pad (3), air induction cavities (10) are provided inside both sides of the casing (1), a through groove is provided between the air inlet cavity (8) and the air induction cavity (10), and the air inlet cavity (8) and the air induction cavity (10) are provided with an air outlet. An air inlet (11) is provided between the air induction cavity (10) and the outer wall of the casing (1); a mounting groove is provided on the mounting pad (3); a heat conducting plate (12) is installed in the mounting groove; heat dissipating fins (13) are welded on both sides of the heat conducting plate (12); the heat dissipating fins (13) are arranged on both sides of the inner wall of the casing (1); heat dissipating components (14) are arranged inside both sides of the casing (1); a heat dissipating plate group (15) is installed on the rear side of the mounting pad (3); a placement groove is provided on the rear side of the casing (1); the heat dissipating plate group (15) is clamped in the placement groove. The natural heat dissipation inverter according to claim 1 is characterized in that: rotating rods (16) are installed on both sides of the inner wall of the air induction chamber (10) through bearings, and blades (17) are installed on the rotating rods (16). A natural heat dissipation inverter according to claim 1, characterized in that: the heat dissipation component (14) includes a conductive sheet (1401), a metal plate (1402) and a heat dissipation block (1403), the conductive sheet (1401) and the heat dissipation block (1403) are respectively welded on both sides of the metal plate (1402), a receiving cavity is provided inside both sides of the housing (1), a clamping groove and a heat dissipation groove are respectively provided on both sides of the receiving cavity, and the conductive sheet (1401), the metal plate (1402) and the heat dissipation block (1403) are respectively clamped in the clamping groove, the receiving cavity and the heat dissipation groove. A natural heat dissipation inverter according to claim 3, characterized in that: a liquid storage cavity (18) is provided in the conductive sheet (1401), the liquid storage cavity (18) is filled with cooling liquid (19), and capillary wicks (20) are provided on both sides of the inner wall of the liquid storage cavity (18). The natural heat dissipation inverter according to claim 1, characterized in that: a graphene coating (21) is coated on the inner wall of the housing (1). The natural heat dissipation inverter according to claim 1 is characterized in that: a local heat absorption component (22) is arranged in the front cover (2), and the local heat absorption component (22) includes a mounting plate (2201), a first energy storage material (2202), The second energy storage material (2203), the third energy storage material (2204), the fourth energy storage material (2205), the first control oil cylinder (2206), the second control oil cylinder (2207), the third control oil cylinder (2208) and the fourth control oil cylinder (2209), the front cover (2) is provided with a recessed groove on the rear side, the mounting plate (2201) is mounted on the inner wall of the recessed groove, the first control oil cylinder (2206), the second control oil cylinder (2207), the third control oil cylinder (2208) and the fourth control oil cylinder (2209) are all arranged in the recessed groove and mounted on the mounting plate (2201), the first energy storage material (2203), the third energy storage material (2204), the fourth energy storage material (2205), the first control oil cylinder (2206), the second control oil cylinder (2207), the third control oil cylinder (2208) and the fourth control oil cylinder (2209) are all arranged in the recessed groove and mounted on the mounting plate (2201), The material (2202), the second energy storage material (2203), the third energy storage material (2204) and the fourth energy storage material (2205) are respectively installed at one end of the first control cylinder (2206), the second control cylinder (2207), the third control cylinder (2208) and the fourth control cylinder (2209); the first control cylinder (2206), the second control cylinder (2207), the third control cylinder (2208) and the fourth control cylinder (2209) respectively correspond to the varistor (4), the rectifier module (5), the filter (6) and the inverter module (7). A natural heat dissipation inverter according to claim 6, characterized in that: a first temperature sensor (23), a second temperature sensor (24), a third temperature sensor (25) and a fourth temperature sensor (26) are installed on the mounting pad (3), the first temperature sensor (23), the second temperature sensor (24), the third temperature sensor (25) and the fourth temperature sensor (26) are respectively arranged at the bottom of the varistor (4), the rectifier module (5), the filter (6) and the inverter module (7), a controller (27) is arranged on the front cover (2), the first temperature sensor (23), the second temperature sensor (24), the third temperature sensor (25) and the fourth temperature sensor (26) are all connected to the controller (27) through wires, and the controller (27) is respectively connected to one end of the first control cylinder (2206), the second control cylinder (2207), the third control cylinder (2208) and the fourth control cylinder (2209) through wires. A natural heat dissipation inverter according to claim 7, characterized in that: connecting pieces (28) are welded on both sides of the casing (1), connecting grooves (29) are opened on both sides of the rear side of the front cover (2), and the connecting pieces (28) are clamped in the connecting grooves (29). A natural heat dissipation inverter according to claim 8, characterized in that: a pressure sensor (30) is installed on the inner wall of the connecting groove (29), an expansion groove is provided on the inner wall of the connecting groove (29), an adjusting piece (32) is installed on the inner wall of the expansion groove through an installing spring (31), a placement cavity is provided in the adjusting piece (32), a micro-cylinder (33) is fixedly installed in the placement cavity, a fixing pin (34) is installed at one end of the micro-cylinder (33), a key hole (35) is provided on one side of the connecting piece (28), and the fixing pin (34) is clamped in the key hole (35), The pressure sensor (30) is connected to the controller (27) via electric wires, and the controller (27) is connected to the micro-cylinder (33) via electric wires.