Mini Inverter

Abstract

The present application relates to the field of frequency converters, and in particular to a Mini frequency converter, including a housing and a heat dissipation device, wherein the housing has an installation cavity, and the heat dissipation device includes a heat dissipation box, a reciprocating screw rod and a heat dissipation piston, wherein the heat dissipation box is connected to the surface of the housing, and a heat dissipation channel for storing coolant is provided in the housing, and the heat dissipation channel is located on the side of the heat dissipation box close to the rectifier bridge, and the reciprocating screw rod is rotatably connected to the inner wall of the heat dissipation channel, and the heat dissipation piston is threadedly connected to the outer wall of the reciprocating screw rod, and the heat dissipation piston divides the heat dissipation channel into two heat dissipation sections, and the inner wall of the heat dissipation section is provided with a flow hole, and the flow hole connects the heat dissipation section and the inner cavity of the heat dissipation box. The arrangement of the heat dissipation box, the reciprocating screw rod and the heat dissipation piston in the present application ensures that the inner wall of the installation cavity stably transfers heat energy to the coolant, realizes stable cooling of electronic components that are prone to heat generation, and makes it difficult for other electronic components in the frequency converter to be damaged by operating in a high temperature state for a long time, thereby extending the service life of the frequency converter.

Description

Technical Field

[0001] The present application relates to the field of frequency converters, and in particular to a Mini frequency converter. Background Art

[0002] The frequency converter is also called a variable frequency drive or drive controller. The frequency converter is an electric power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the working power frequency of the motor.

[0003] The rectifier bridge, inverter tube and capacitor in the inverter are the main heat-generating components, but the rectifier bridge, inverter tube and capacitor are mainly installed in a certain position of the inverter, which makes it easy for heat to accumulate in the inverter. The heat quickly reaches the heat dissipation threshold, causing other electronic components in the inverter to run in a high temperature state for a long time and wear out, thereby shortening the service life of the inverter. Summary of the invention

[0004] In order to improve the service life of the inverter, the present application provides a Mini inverter.

[0005] The present application provides a Mini inverter, which adopts the following technical solution:

[0006] A Mini inverter comprises a housing and a heat dissipation device, wherein the housing has an installation cavity for installing electronic components, the heat dissipation device comprises a heat dissipation box, a reciprocating screw rod and a heat dissipation piston, the heat dissipation box is connected to the surface of the housing close to a rectifier bridge, the inner cavity of the heat dissipation box is used to store coolant, a heat dissipation channel for storing coolant is provided in the housing, the heat dissipation channel is located on a side of the heat dissipation box close to the rectifier bridge, the reciprocating screw rod is rotatably connected to the inner wall of the heat dissipation channel, the heat dissipation piston is threadedly connected to the outer wall of the reciprocating screw rod, the heat dissipation piston divides the heat dissipation channel into two heat dissipation sections, the inner wall of the heat dissipation section is provided with a flow hole, and the flow hole connects the heat dissipation section and the inner cavity of the heat dissipation box.

[0007] By adopting the above technical solution, electronic components such as the rectifier bridge, the inverter single tube and the capacitor are installed on the inner wall of the installation cavity, and the heat dissipation channel is located on the side of the heat dissipation box close to the rectifier bridge. When the rectifier bridge, the inverter single tube and the capacitor and other electronic components generate a large amount of heat energy during operation, the rectifier bridge, the inverter single tube and the capacitor and other electronic components transfer the heat energy to the inner wall of the installation cavity, the inner wall of the installation cavity is heated, and the inner wall of the installation cavity transfers the heat energy to the coolant in the heat dissipation channel to achieve heat dissipation of the rectifier bridge, the inverter single tube and the capacitor and other electronic components; at the same time, the reciprocating screw rod rotates on the inner wall of the heat dissipation channel, driving the heat dissipation piston to slide on the inner wall of the heat dissipation channel along the axis of the reciprocating screw rod, driving the coolant in one of the heat dissipation sections to enter the heat dissipation box through the flow hole, and the coolant in the heat dissipation box enters the other heat dissipation section through the flow hole, promoting the coolant in the heat dissipation channel to flow, ensuring that the inner wall of the installation cavity stably transfers the heat energy to the coolant, achieving stable cooling of the electronic components that are easy to heat up, so that other electronic components in the inverter are not easy to be damaged by running in a high temperature state for a long time, thereby extending the service life of the inverter.

[0008] Optionally, the heat dissipation device also includes a cooling component, which includes a cooling airbag and an extrusion plate. The cooling airbag is connected to the surface of the heat dissipation box away from the box body, and the extrusion plate is connected to the surface of the cooling airbag away from the heat dissipation box. Vents are opened on the surface of the extrusion plate, and the vents are connected to the inner cavity of the cooling airbag.

[0009] By adopting the above technical scheme, when the temperature of the coolant in the heat sink increases, the coolant transfers the heat energy to the inner wall of the heat sink, the inner wall of the heat sink increases in temperature, the cooling airbag is connected to the surface of the cooling box, and the outer wall of the cooling box transfers the heat energy to the air in the cooling airbag, thereby cooling the coolant in the cooling box; at the same time, the extrusion plate is pressed in the direction close to the cooling box to drive the air in the cooling airbag to be discharged through the vent hole, thereby replacing the air in the cooling airbag, so that the outer wall of the cooling box transfers the heat energy to the air in the cooling airbag in a stable manner, making the coolant in the cooling box less likely to heat up, thereby improving the stability of cooling the electronic components in the installation cavity.

[0010] Optionally, the cooling component also includes an elastic member, a clamping rod and a cam, the end of the clamping rod is connected to the surface of the extrusion plate facing the box body, the surface of the box body is provided with a clamping cavity for the end of the clamping rod to pass through, one end of the reciprocating screw passes through the inner wall of the heat dissipation channel and protrudes from the inner wall of the clamping cavity, the cam is coaxially connected to the end of the reciprocating screw protruding from the inner wall of the clamping cavity, one end of the elastic member in the elastic force direction is connected to the surface of the box body, and the other end of the elastic member in the elastic force direction is connected to the extrusion plate surface, the elastic member has the elastic force to drive the extrusion plate to slide in the direction close to the box body, and the clamping rod surface tends to roll in contact with the cam wheel surface.

[0011] By adopting the above technical scheme, the elastic force of the elastic member drives the extrusion plate to slide in the direction close to the box body, and the surface of the clamping rod is in rolling contact with the cam wheel surface. The cam has a large end and a small end. When the reciprocating screw rotates on the inner wall of the heat dissipation channel, the cam is driven to rotate around the axis of the reciprocating screw. When the large end of the cam abuts against the end surface of the clamping rod, the extrusion plate is driven to slide in the direction close to the box body, and the air in the cooling airbag is driven to be discharged through the vent. When the small end of the cam abuts against the end surface of the clamping rod, the extrusion plate is driven to slide in the direction away from the box body, and the outside air is driven to enter the inner cavity of the cooling airbag through the vent, thereby realizing the rotation of the air in the cooling airbag. There is no need to install an external power device to drive the extrusion plate to press, thereby reducing energy loss, thereby embodying the concept of energy saving.

[0012] Optionally, the clamping rod includes a clamping portion and a roller, wherein the roller is rotatably connected to one end of the clamping portion, and the other end of the clamping portion is connected to a surface of an extrusion plate, and the wheel surface of the roller is in rolling contact with the wheel surface of a cam.

[0013] By adopting the above technical solution, the roller is rotatably connected to one end of the clamping part, and the other end of the clamping part is connected to the extrusion plate surface. The roller surface and the cam wheel surface are in rolling contact, and rolling friction replaces sliding friction, reducing the wear between the cam and the clamping rod, thereby extending the service life of the Mini inverter.

[0014] Optionally, the clamping rod also includes a limit ring, which is connected to the surface of the clamping part. The elastic force of the elastic member drives the extrusion plate to slide in the direction close to the box body, and the surface of the limit ring abuts against the surface of the box body to form a limit. The cam includes a wheel body and a thermal expansion and contraction ring. The wheel body is coaxially connected to one end of the reciprocating screw, and the inner ring of the thermal expansion and contraction ring is connected to the outer peripheral surface of the wheel body. When the thermal expansion and contraction ring heats up and expands, the outer ring of the thermal expansion and contraction ring rolls in contact with the roller surface.

[0015] By adopting the above technical scheme, the elastic force of the elastic part drives the extrusion plate to slide in the direction close to the box body, and the surface of the limit ring abuts against the surface of the box body to form a limit; when the temperature of the coolant in the heat dissipation channel rises, the coolant transfers the heat energy to the thermal expansion and contraction ring through the reciprocating screw and the wheel body, the thermal expansion and contraction ring heats up and expands, and the outer ring of the thermal expansion and contraction ring rolls in contact with the roller, driving the abutting part to slide back and forth on the inner wall of the abutting cavity, thereby achieving directional abutment between the outer ring of the thermal expansion and contraction ring and the roller, reducing the wear on the Mini inverter and extending the service life of the Mini inverter.

[0016] Optionally, a fan is connected to the surface of the box body, and an air cooling channel is opened on the surface of the box body facing the air outlet end of the fan, and the air cooling channel is connected to the abutting cavity and passes through the top wall of the box body.

[0017] By adopting the above technical solution, the fan drives the outside air into the air-cooling flow channel through the air outlet end. The air in the air-cooling flow channel fully contacts and exchanges heat with the inner wall of the air-cooling flow channel, thereby cooling the inner wall of the air-cooling flow channel and realizing the simultaneous opening of the air-cooling mode and the water-cooling mode of the box.

[0018] Optionally, the end of the reciprocating screw rod 1 protruding against the inner wall of the cavity is coaxially connected to an impeller 1, and the air in the air-cooling flow channel impacts the blades of the impeller 1 and drives the impeller 1 to rotate.

[0019] By adopting the above technical solution, when the fan drives the outside air into the air-cooling flow channel and discharges it from the top of the box, the air in the air-cooling flow channel impacts the impeller blades and drives the impeller to rotate around its own axis, driving the reciprocating screw to rotate around its own axis. There is no need for an external power device to drive the reciprocating screw to rotate, thereby reducing energy loss and embodying the concept of energy saving.

[0020] Optionally, the box is connected to a cleaning assembly, which includes a reciprocating screw rod 2 and a scraper. The reciprocating screw rod 2 is rotatably connected to the top wall of the box, and the scraper is threadedly connected to the outer wall of the reciprocating screw rod 2. The scraper slides along the axis of the reciprocating screw rod 2, and the scraping end of the scraper is pressed against the surface of the box and scrapes impurities on the top wall of the box.

[0021] By adopting the above technical solution, when the reciprocating screw rod 2 rotates on the top wall of the box, it drives the scraper to slide on the top of the box along the axis of the reciprocating screw rod 2. The scraping end of the scraper presses against the surface of the box and scrapes away impurities on the top wall of the box, thereby achieving directional cleaning of the top wall of the box.

[0022] Optionally, the cleaning assembly further comprises an impeller 2, wherein the impeller 2 is coaxially connected to the end of the reciprocating screw 2 facing the air-cooling flow channel, and the air discharged from the air-cooling flow channel impacts the blades of the impeller 2 and drives the impeller 2 to rotate.

[0023] By adopting the above technical solution, impeller 2 is coaxially installed at the end of reciprocating screw 2 facing the air-cooling flow channel. When the air discharged from the air-cooling flow channel hits the blades of impeller 2 and drives impeller 2 to rotate, reciprocating screw 2 is driven to rotate around its own axis. No external power device is required to drive reciprocating screw 2 to rotate, thereby reducing energy loss and embodying the concept of energy saving.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The setting of the heat sink, reciprocating screw and heat dissipation piston ensures that the inner wall of the installation cavity stably transfers heat energy to the coolant, realizes stable cooling of the electronic components that are prone to heat, and makes it difficult for other electronic components in the inverter to be damaged by operating at high temperature for a long time, thereby extending the service life of the inverter;

[0026] 2. The setting of cooling airbag and extrusion plate realizes the replacement of air in the cooling airbag, so that the outer wall of the cooling box transfers heat energy to the air in the cooling airbag stably, making the coolant in the cooling box less likely to heat up, thereby improving the stability of cooling the electronic components in the installation cavity;

[0027] 3. The setting of the elastic member, the clamping rod and the cam drives the outside air into the inner cavity of the cooling airbag through the vent hole, thereby realizing the rotation of the air in the cooling airbag. There is no need to install an external power device to drive the extrusion plate to press, thereby reducing energy loss and reflecting the concept of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0029] Figure 2 It is a cross-sectional view in an embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the partial structure of the cooling component in the embodiment of the present application.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. housing; 11. mounting cavity; 12. heat dissipation channel; 121. heat dissipation section; 13. circulation hole; 14. pressing cavity; 15. avoidance cavity; 16. air-cooling channel; 2. heat dissipation device; 21. heat dissipation box; 22. reciprocating screw rod one; 23. heat dissipation piston; 24. cooling component; 241. cooling air bag; 242. extrusion plate; 2421. vent hole; 243. elastic member; 244. pressing rod; 2441. pressing part; 2442. roller; 2443. limiting ring; 245. cam; 2451. wheel body; 2452. thermal expansion and contraction ring; 3. cabinet door; 4. fan; 5. impeller one; 6. cleaning component; 61. reciprocating screw rod two; 62. scraper; 63. impeller two. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] The present application embodiment discloses a Mini inverter. Figure 1 and Figure 2 The Mini inverter includes a box body 1 and a heat sink 2. The bottom of the box body 1 abuts against the ground to form a support. The box body 1 has an installation cavity 11 for installing electronic components. The box body 1 is rotatably connected to a cabinet door 3 covering the installation cavity 11. The heat sink 2 is installed on the surface of the box body 1. The heat sink 2 can cool the electronic components in the installation cavity 11, so that the electronic components in the installation cavity 11 are not easily damaged by running in a high temperature state for a long time, thereby extending the service life of the Mini inverter.

[0034] Reference Figure 2 and Figure 3 The heat dissipation device 2 includes a heat dissipation box 21, a reciprocating screw rod 22, a heat dissipation piston 23 and a cooling component 24. The heat dissipation box 21 is fixed to the side wall of the box body 1 close to the rectifier bridge by bolts. The inner cavity of the heat dissipation box 21 stores coolant. In the embodiment of the present application, the coolant is water with a large specific heat capacity. A heat dissipation channel 12 for storing coolant is provided in the box body 1. The reciprocating screw rod 22 is rotatably connected to the inner wall of the heat dissipation channel 12. The axis of the reciprocating screw rod 22 and the height direction of the box body 1 are parallel to each other. The material of the heat dissipation piston 23 is It can be rubber or silicone. The material of the heat dissipation piston 23 in the embodiment of the present application is rubber, which has a certain deformation ability. The heat dissipation piston 23 is threadedly connected to the outer wall of the reciprocating screw 22. The heat dissipation piston 23 slides on the inner wall of the heat dissipation channel 12 along the axis of the reciprocating screw 22. The heat dissipation piston 23 separates the heat dissipation channel 12 into two heat dissipation sections 121. The inner walls of the heat dissipation sections 121 are each provided with flow holes 13. The flow holes 13 penetrate the outer wall of the box body 1 and the outer wall of the heat dissipation box 21 and are connected to the inner cavity of the heat dissipation box 21.

[0035] Reference Figure 2 and Figure 3 When the reciprocating screw 22 rotates on the inner wall of the heat dissipation channel 12, the heat dissipation piston 23 is driven to slide back and forth on the inner wall of the heat dissipation channel 12 along the axis of the reciprocating screw 22, driving the coolant in one of the heat dissipation sections 121 to enter the inner cavity of the heat dissipation box 21 through the circulation hole 13, and at the same time, the coolant in the heat dissipation box 21 enters another heat dissipation section 121 through another circulation hole 13, promoting the flow and replacement of the coolant in the heat dissipation channel 12; at the same time, the heat energy generated by the electronic components in the installation cavity 11 during operation is transferred to the inner wall of the installation cavity 11, and the inner wall of the installation cavity 11 transfers the heat energy to the coolant, thereby achieving stable cooling of the electronic components in the installation cavity 11, ensuring that the electronic components in the installation cavity 11 are not easily damaged by operating in a high temperature state for a long time, thereby extending the service life of the Mini inverter.

[0036] Reference Figure 2 and Figure 3 The cooling component 24 can cool the coolant in the cooling box. The cooling component 24 includes a cooling airbag 241, an extrusion plate 242, an elastic member 243, a tightening rod 244 and a cam 245. The material of the cooling airbag 241 can be rubber or silicone. In the embodiment of the present application, the material of the cooling airbag 241 is rubber, which has a certain deformation ability. The elastic member 243 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 243 is a tension spring, which has a certain deformation ability; the cooling airbag 241 is fixed on the surface of the heat dissipation box 21 away from the box body 1, the extrusion plate 242 is fixed on the surface of the cooling airbag 241 away from the heat dissipation box 21, and the extrusion plate 242 is provided with a vent 2421 on the plate surface, and the vent 2421 is connected to the inner cavity of the cooling airbag 241.

[0037] Reference Figure 2and Figure 3 The clamping rod 244 includes a clamping portion 2441, a roller 2442 and a limiting ring 2443. The inner ring of the limiting ring 2443 is sleeved on the outer circumference of the clamping portion 2441. The roller 2442 is rotatably connected to one end of the clamping portion 2441 in the length direction. The other end of the clamping portion 2441 in the length direction is fixed to the surface of the extrusion plate 242 facing the box body 1. The surface of the box body 1 is provided with a clamping cavity 1 for the end of the clamping portion 2441 with the roller 2442 to pass through. 4, the sliding direction of the pressing part 2441 in the pressing cavity 14 and the length direction of the box body 1 are parallel to each other, the end of the reciprocating screw 22 penetrates the inner wall of the heat dissipation channel 12 and protrudes from the inner wall of the pressing cavity 14, the cam 245 includes a wheel body 2451 and a thermal expansion and contraction ring 2452, the material of the thermal expansion and contraction ring 2452 can be nylon or memory alloy, and the material of the thermal expansion and contraction ring 2452 in the embodiment of the present application is memory alloy, which has a good thermal expansion coefficient.

[0038] Reference Figure 2 and Figure 3 The wheel body 2451 is coaxially fixed to the end of the reciprocating screw 22 that protrudes from the inner wall of the pressing cavity 14, the inner ring of the thermal expansion and contraction ring 2452 is fixed to the wheel surface of the wheel body 2451, and the outer ring of the thermal expansion and contraction ring 2452 faces the wheel surface of the roller 2442; one end of the elastic member 243 in the elastic direction is fixed to the surface of the box body 1, and the other end of the elastic member 243 in the elastic direction is fixed to the plate surface of the extrusion plate 242. The elastic member 243 has elastic force to drive the pressing portion 2441 to slide toward the direction close to the pressing cavity 14, the surface of the limit ring 2443 abuts against the surface of the box body 1 to form a limit, and the wheel surface of the roller 2442 tends to face the outer ring of the thermal expansion and contraction ring 2452.

[0039] Reference Figure 2 and Figure 3When the coolant in the heat dissipation channel 12 heats up and transfers the heat energy to the thermal expansion and contraction ring 2452 through the reciprocating screw rod 22 and the wheel body 2451, the thermal expansion and contraction ring 2452 heats up and expands, and the outer ring of the thermal expansion and contraction ring 2452 rolls with the wheel surface of the roller 2442. When the reciprocating screw rod 22 rotates on the inner wall of the heat dissipation channel 12, the cam 245 is driven to rotate around the axis of the reciprocating screw rod 22. The cam 245 has a large end and a small end. When the large end of the cam 245 abuts against the wheel surface of the roller 2442, the pressing part 2441 is driven to slide in the direction close to the pressing cavity 14, and the extrusion plate 242 squeezes the surface of the cooling airbag 241 and drives the air in the cooling airbag 241 to be discharged through the vent 2421; when the cam 245 When the small end abuts against the wheel surface of the roller 2442, the pressing part 2441 is driven to slide in the direction away from the pressing cavity 14, and the squeezing effect of the extrusion plate 242 on the cooling airbag 241 disappears. The extrusion plate 242 drives the cooling airbag 241 to expand, and the outside air enters the inner cavity of the cooling airbag 241 through the vent 2421, thereby realizing the alternating replacement of the air in the cooling airbag 241. At the same time, the coolant in the heat sink 21 transfers the heat energy to the inner wall of the heat sink 21. The inner wall of the heat sink 21 heats up, and the inner wall of the heat sink 21 transfers the heat energy to the air in the cooling airbag 241, so that the coolant in the heat sink 21 is not easy to heat up, thereby ensuring the stability of heat exchange between the coolant in the heat dissipation channel 12 and the electronic components in the installation cavity 11.

[0040] Reference Figure 1 and Figure 2 The box body 1 is equipped with a fan 4. A side wall of the box body 1 close to the heat dissipation box 21 is provided with an avoidance cavity 15 for installing the fan 4. The fan 4 is fixed to the inner wall of the avoidance cavity 15 by bolts. The surface of the fan 4 is flush with the surface of the box body 1, so that the fan 4 is not easy to protrude from the surface of the box body 1, thereby reducing the size of the inverter and adapting to the needs of different application scenarios.

[0041] Reference Figure 1 and Figure 2 An air-cooling channel 16 is provided on the inner wall of the avoidance cavity 15 toward the air outlet end of the fan 4. The air-cooling channel 16 and the heat dissipation channel 12 surround the installation cavity 11. The air-cooling channel 16 is connected to the abutting cavity 14. The end of the air-cooling channel 16 close to the abutting cavity 14 passes through the top wall of the box body 1. The fan 4 drives the outside air into the air-cooling channel 16 through the air outlet end and is discharged from the top of the box body 1. The air is in full contact with the inner wall of the air-cooling channel 16 and performs heat exchange, thereby realizing the simultaneous start-up of the air-cooling mode and the water-cooling mode of the box body 1, ensuring that the electronic components in the installation cavity 11 are not easily damaged by running in a high temperature state, thereby extending the service life of the Mini inverter.

[0042] Reference Figure 1 and Figure 2The end of the reciprocating screw 22 protruding from the inner wall of the cavity 14 is coaxially fixed with an impeller 5. The air in the air-cooling channel 16 impacts the blades of the impeller 5 in the cavity 14, driving the impeller 5 to rotate. The impeller 5 is coaxially fixed to the end of the reciprocating screw 22, driving the reciprocating screw 22 to rotate on the inner wall of the heat dissipation channel 12. There is no need for an external power device to drive the reciprocating screw 22 to rotate, thereby reducing energy loss, thereby embodying the concept of energy saving.

[0043] Reference Figure 1 and Figure 2 The box body 1 is installed with a cleaning component 6, which can clean the top wall of the box body 1. The cleaning component 6 includes a reciprocating screw rod 61, a scraper 62 and an impeller 63. The reciprocating screw rod 61 is rotatably connected to the top of the box body 1, and the axis of the reciprocating screw rod 61 and the length direction of the box body 1 are parallel to each other. The scraper 62 is threadedly connected to the outer wall of the reciprocating screw rod 61. The scraper 62 is threadedly connected to the outer wall of the reciprocating screw rod 61. The scraper 62 slides on the top wall of the box body 1 along the axis of the reciprocating screw rod 61, and the scraping end of the scraper 62 is pressed against the top wall of the box body 1 and scrapes away impurities on the top wall of the box body 1, thereby realizing directional cleaning of impurities on the top of the box body 1.

[0044] Reference Figure 1 and Figure 2 The impeller 63 is coaxially fixed to the end of the reciprocating screw 61 facing the air-cooling channel 16. The air discharged from the air-cooling channel 16 impacts the blades of the impeller 63 and drives the impeller 63 to rotate, driving the reciprocating screw 61 to rotate on the top wall of the box body 1. There is no need for an external power device to drive the reciprocating screw 61 to rotate, thereby reducing energy loss and embodying the concept of energy saving.

[0045] The implementation principle of a Mini inverter in the embodiment of the present application is as follows: when the electronic components in the installation cavity 11 are running and generate heat energy, the electronic components transfer the heat energy to the inner wall of the installation cavity 11. After the inner wall of the installation cavity 11 is heated up, the heat energy is transferred to the coolant in the heat dissipation section 121, so as to cool the electronic components, so that other electronic components in the inverter are not easily damaged by running in a high temperature state for a long time, thereby extending the service life of the inverter; at the same time, the coolant in the heat dissipation channel 12 is heated up and transfers the heat energy to the thermal expansion and contraction ring 2452 through the reciprocating screw rod 22 and the wheel body 2451. The thermal expansion and contraction ring 2452 is heated up and expanded, and the outer ring of the thermal expansion and contraction ring 2452 is in rolling contact with the wheel surface of the roller 2442. When the large end of the cam 245 abuts against the wheel surface of the roller 2442, it drives the pressing part 2441 to slide in the direction close to the pressing cavity 14, and the extrusion plate 2 42 squeezes the surface of the cooling airbag 241 and drives the air in the cooling airbag 241 to be discharged through the vent 2421; when the small end of the cam 245 abuts against the wheel surface of the roller 2442, it drives the pressing part 2441 to slide in the direction away from the pressing cavity 14, and the squeezing effect of the squeezing plate 242 on the cooling airbag 241 disappears, and the squeezing plate 242 drives the cooling airbag 241 to unfold, and the outside air enters the inner cavity of the cooling airbag 241 through the vent 2421, thereby realizing the alternating replacement of the air in the cooling airbag 241. At the same time, the coolant in the heat sink 21 transfers the heat energy to the inner wall of the heat sink 21, and the inner wall of the heat sink 21 heats up, and the inner wall of the heat sink 21 transfers the heat energy to the air in the cooling airbag 241, so that the coolant in the heat sink 21 is not easy to heat up, thereby ensuring the stability of heat exchange between the coolant in the heat dissipation channel 12 and the electronic components in the installation cavity 11.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Mini inverter, characterized by: The invention comprises a housing (1) and a heat dissipation device (2), wherein the housing (1) has an installation cavity (11) for installing electronic components, and the heat dissipation device (2) comprises a heat dissipation box (21), a reciprocating screw rod (22) and a heat dissipation piston (23), wherein the heat dissipation box (21) is connected to a surface of the housing (1) close to a rectifier bridge, and an inner cavity of the heat dissipation box (21) is used to store cooling liquid, and a heat dissipation channel (12) for storing cooling liquid is provided in the housing (1), and the heat dissipation channel (12) is located on a side of the heat dissipation box (21) close to the rectifier bridge, and the reciprocating screw rod (22) is rotatably connected to the heat dissipation channel (1 2) inner wall, the heat dissipation piston (23) is threadedly connected to the outer wall of the reciprocating screw rod (22), the heat dissipation piston (23) divides the heat dissipation channel (12) into two heat dissipation sections (121), the inner wall of the heat dissipation section (121) is provided with a flow hole (13), the flow hole (13) communicates with the heat dissipation section (121) and the inner cavity of the heat dissipation box (21); the heat dissipation device (2) also includes a cooling component (24), the cooling component (24) includes a cooling airbag (241) and an extrusion plate (242), the cooling airbag (241) is connected to the heat dissipation box (21) away from the box body (1) The extrusion plate (242) is connected to the surface of the cooling airbag (241) away from the heat dissipation box (21), and the extrusion plate (242) is provided with a vent hole (2421), and the vent hole (2421) is connected to the inner cavity of the cooling airbag (241); the cooling component (24) also includes an elastic member (243), a clamping rod (244) and a cam (245), the end of the clamping rod (244) is connected to the surface of the extrusion plate (242) facing the box body (1), and the surface of the box body (1) is provided with a clamping cavity (14) for the end of the clamping rod (244) to pass through, and the cam (245) is connected to the surface of the cooling airbag (241) away from the heat dissipation box (21), and the surface of the cooling airbag (241) is provided with a vent hole (2421), and the vent hole (2421) is connected to the inner cavity of the cooling airbag (241); the cooling component (24) also includes an elastic member (243), a clamping rod (244) and a cam (245), the end of the clamping rod (244) is connected to the surface of the extrusion plate (242) facing the box body (1), and the surface of the box body (1) is provided with a clamping cavity (14) for the end of the clamping rod (244) to pass through. The end of the reciprocating screw rod (22) penetrates the inner wall of the heat dissipation channel (12) and protrudes against the inner wall of the cavity (14); the cam (245) is coaxially connected to the end of the reciprocating screw rod (22) protruding against the inner wall of the cavity (14); one end of the elastic member (243) in the elastic force direction is connected to the surface of the box body (1); the other end of the elastic member (243) in the elastic force direction is connected to the plate surface of the extrusion plate (242); the elastic member (243) has the tendency to drive the extrusion plate (242) to slide in a direction close to the box body (1), and the rod surface of the abutting rod (244) and the wheel surface of the cam (245) are in rolling contact.

2. The Mini inverter according to claim 1, characterized in that: The pressing rod (244) comprises a pressing portion (2441) and a roller (2442), wherein the roller (2442) is rotatably connected to one end of the pressing portion (2441), and the other end of the pressing portion (2441) is connected to the surface of the extrusion plate (242), and the wheel surface of the roller (2442) is in rolling contact with the wheel surface of the cam (245).

3. The Mini inverter according to claim 2, characterized in that: The clamping rod (244) further comprises a limiting ring (2443), wherein the limiting ring (2443) is connected to the surface of the clamping part (2441); the elastic force of the elastic member (243) drives the extrusion plate (242) to slide in a direction close to the box body (1); the surface of the limiting ring (2443) abuts against the surface of the box body (1) to form a limit; the cam (245) comprises a wheel body (2451) and a thermal expansion and contraction ring (2452); the wheel body (2451) is coaxially connected to one end of the reciprocating screw rod (22); the inner ring of the thermal expansion and contraction ring (2452) is connected to the outer peripheral surface of the wheel body (2451); when the thermal expansion and contraction ring (2452) is heated and expanded, the outer ring of the thermal expansion and contraction ring (2452) rolls in contact with the wheel surface of the roller (2442).

4. The Mini inverter according to claim 1, characterized in that: The surface of the box body (1) is connected to a fan (4), and a cooling channel (16) is provided on the surface of the box body (1) facing the air outlet of the fan (4). The cooling channel (16) is connected to the abutting cavity (14) and passes through the top wall of the box body (1).

5. The Mini inverter according to claim 4, characterized in that: The end of the reciprocating screw rod (22) protruding from the inner wall of the cavity (14) is coaxially connected to the impeller (5), and the air in the air-cooling channel (16) impacts the blades of the impeller (5) and drives the impeller (5) to rotate.

6. The Mini inverter according to claim 4, characterized in that: The box body (1) is connected to a cleaning assembly (6), and the cleaning assembly (6) comprises a second reciprocating screw rod (61) and a scraper (62). The second reciprocating screw rod (61) is rotatably connected to the top wall of the box body (1), and the scraper (62) is threadedly connected to the outer wall of the second reciprocating screw rod (61). The scraper (62) slides along the axis of the second reciprocating screw rod (61), and the scraping end of the scraper (62) is pressed against the surface of the box body (1) and scrapes impurities on the top wall of the box body (1).

7. The Mini inverter according to claim 6, characterized in that: The cleaning assembly (6) also includes a second impeller (63), wherein the second impeller (63) is coaxially connected to the end of the second reciprocating screw (61) facing the air-cooling flow channel (16), and the air discharged from the air-cooling flow channel (16) impacts the blades of the second impeller (63) and drives the second impeller (63) to rotate.

Images