Frequency Converter

Abstract

The present application relates to the field of frequency converters, and in particular to a frequency converter, which includes a housing, a cover plate, an alloy plate, an inverter, a drive plate, a capacitor and a fan, a housing having a receiving groove on one side, a cover plate detachably connected to the housing, a cover plate used to cover the notch of the receiving groove, a cover plate and the housing enclose a receiving cavity, an alloy plate fixedly connected to the groove wall of the receiving groove, the alloy plate divides the receiving cavity into a heat dissipation cavity and an installation cavity, the installation cavity is arranged on the side of the alloy plate facing the cover plate, the housing has a fixed cavity, the groove wall of the receiving groove has a first vent, the two ends of the housing are respectively provided with a first air inlet and an air outlet, the first vent and the first air inlet are both connected to the heat dissipation cavity, the first vent and the air outlet are connected to the fixed cavity, and the fan is fixedly connected to the inner wall of the fixed cavity. The alloy plate is easy to conduct heat, and the rotation of the fan allows the outside air to enter the heat dissipation cavity from the first air inlet, and then be discharged from the air outlet through the first air vent, so as to facilitate the heat dissipation of the alloy plate and improve the heat dissipation efficiency.

Description

Technical Field

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

[0002] The inverter is also called a variable frequency drive or drive controller. It is a power control device that uses the principles of frequency conversion technology and microelectronics technology to control the AC motor by changing the working power frequency of the motor. The inverter adjusts the output power voltage and frequency by the internal IGBT switching, and provides the required power voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation.

[0003] The inverter will generate a lot of heat during operation, which mainly comes from the loss of power devices (such as IGBT, IGCT, etc.), the heating of rectifier diodes, inverter modules and other components, as well as the loss of control parts such as control boards and control power supplies. As the temperature rises, the failure rate of the inverter will also increase, so heat dissipation is crucial to ensure the reliability and stability of the inverter.

[0004] Most existing frequency converters dissipate heat naturally or by installing a cooling fan, but the heat dissipation effect is poor. Summary of the invention

[0005] In order to improve heat dissipation efficiency, the present application provides a frequency converter.

[0006] The inverter provided in this application adopts the following technical solution:

[0007] A frequency converter comprises a shell, a cover plate, an alloy plate, an inverter, a drive board, a capacitor and a fan, wherein a receiving groove is provided on one side of the shell, the cover plate is detachably connected to the shell, the cover plate is used to cover the notch of the receiving groove, the cover plate and the shell are combined to form a receiving cavity, the alloy plate is fixedly connected to the groove wall of the receiving groove, the alloy plate divides the receiving cavity into a heat dissipation cavity and an installation cavity, the installation cavity is arranged on the side of the alloy plate facing the cover plate, the inverter is fixedly connected to one end of the alloy plate away from the bottom of the receiving groove, the inverter is connected to one side of the drive board, the capacitor is connected to the other side of the drive board, the shell is provided with a fixed cavity, the groove wall of the receiving groove is provided with a first vent, the two ends of the shell are respectively provided with a first air inlet and an air outlet, the first vent and the first air inlet are both connected to the heat dissipation cavity, the first vent and the air outlet are connected to the fixed cavity, the fan is fixedly connected to the inner wall of the fixed cavity, the first vent is directly opposite to the air inlet of the fan, and the air outlet of the fan is directly opposite to the air outlet.

[0008] By adopting the above technical solution, the alloy plate is easy to conduct heat, and the rotation of the fan allows the outside air to enter the heat dissipation cavity from the first air inlet, and then be discharged from the air outlet through the first air vent, which is convenient for heat dissipation of the alloy plate, thereby achieving heat dissipation of the inverter and improving heat dissipation efficiency.

[0009] Preferably, it further comprises a control board and a control line, wherein the control board is fixedly connected to one end of the cover plate facing the drive board, and the control board is electrically connected to the drive board via the control line.

[0010] By adopting the above technical solution, the operation of the frequency converter is controlled by the control panel, which is convenient for users to use.

[0011] Preferably, it also includes a panel and a plug-in, the cover plate is provided with a limiting groove at one end facing away from the shell, the bottom of the limiting groove is provided with a through-hole, the panel is fixedly embedded in the limiting groove, the panel is electrically connected to the control board through the plug-in, and the plug-in passes through the through-hole.

[0012] By adopting the above technical solution, the control panel is controlled through the panel, and the panel is easy for users to operate and use.

[0013] Preferably, the groove wall of the accommodating groove is provided with a second air vent, the outer wall of the shell is provided with a second air inlet, the second air vent and the second air inlet are both connected to the installation cavity, the second air vent is connected to the fixing cavity, and the second air vent is directly opposite to the air inlet of the fan.

[0014] By adopting the above technical solution, the fan rotates, and the outside air enters the installation cavity from the second air inlet, and is then discharged from the air outlet through the second air vent, which facilitates the heat dissipation of the drive board, control board and capacitor, and improves the heat dissipation efficiency.

[0015] Preferably, it also includes a dustproof net, which is fixedly connected to the outer wall of the shell and covers the first air inlet and the second air inlet.

[0016] By adopting the above technical solution, the entry of foreign matter into the heat dissipation cavity and the installation cavity from the first air inlet and the second air inlet is reduced, the circuit components are protected, and the service life of the inverter is extended.

[0017] Preferably, it also includes a first baffle and a second baffle, both of which are slidably connected to the groove wall of the accommodating groove, the first baffle is provided with a first connecting port, the first baffle slides to control the connection between the first air inlet and the first connecting port, the second baffle is provided with a second connecting port, the second baffle slides to control the connection between the second air inlet and the second connecting port.

[0018] By adopting the above technical solution, when the temperature in the heat dissipation cavity is high and the temperature in the installation cavity is low, the first connecting port is connected to the first air inlet, and the second baffle covers the second air inlet, thereby accelerating the air circulation in the heat dissipation cavity, improving the heat dissipation efficiency, reducing the entry of impurities into the installation cavity, and extending the service life of the inverter.

[0019] Preferably, the first air inlet is provided in plurality, and the plurality of the first air inlet are evenly spaced along the groove depth direction of the accommodating groove; the first connecting ports are provided in plurality, and the first connecting ports are arranged in one-to-one correspondence with the first air inlet; the second air inlet is provided in plurality, and the plurality of the second air inlet are evenly spaced along the groove depth direction of the accommodating groove; the second connecting ports are provided in plurality, and the second connecting ports are arranged in one-to-one correspondence with the second air inlet.

[0020] By adopting the above technical solution, it is easy to control the connection and disconnection between the first air inlet and the second connecting port, and it is easy to control the connection and disconnection between the second air inlet and the second connecting port. Multiple first air inlets and second air inlets increase the air intake volume and improve the heat dissipation efficiency.

[0021] Preferably, it further comprises a first fixed plate, a first spring, a first movable plate, a first memory alloy, a first connecting rod, a second fixed plate, a second spring, a second movable plate, a second memory alloy, a second connecting rod, a first abutting plate and a second abutting plate, wherein the groove wall of the accommodating groove is provided with a control groove, the control groove is provided between the first air inlet and the second air inlet, and the control groove is used for the first connecting rod and the second connecting rod to pass through;

[0022] The first fixing plate is fixedly connected to the groove wall of the accommodating groove, the first fixing plate is arranged between the groove bottom of the accommodating groove and the alloy plate, the first fixing plate is provided with a first fixing groove at one end away from the alloy plate, one end of the first spring is fixedly connected to the groove bottom of the first fixing groove, the other end of the first spring is fixedly connected to the first movable plate, one end of the first memory alloy is fixedly connected to the first movable plate, the other end of the first memory alloy is fixedly connected to one end of the first connecting rod, and the other end of the first connecting rod is fixedly connected to the second baffle;

[0023] The second fixing plate is fixedly connected to the groove wall of the accommodating groove, the second fixing plate is arranged between the control plate and the driving plate, the second fixing plate is provided with a second fixing groove at one end away from the driving plate, one end of the second spring is fixedly connected to the groove bottom of the second fixing groove, the other end of the second spring is fixedly connected to the second movable plate, one end of the second memory alloy is fixedly connected to the second movable plate, the other end of the second memory alloy is fixedly connected to one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected to the first baffle;

[0024] The first abutment plate is fixedly connected to one end of the first connecting rod facing the second connecting rod, and the second abutment plate is fixedly connected to one end of the second connecting rod facing the first connecting rod. The first abutment plate is arranged on a side of the second abutment plate away from the bottom of the accommodating groove. The first abutment plate and the second abutment plate abut each other. When the ambient temperature rises to the deformation temperature, the first memory alloy and the second memory alloy deform and elongate.

[0025] By adopting the above technical scheme, when the temperatures of the heat dissipation cavity and the installation cavity are normal, the first abutment plate abuts against the second abutment plate, the first air inlet is connected to the first connecting port, the second air inlet is connected to the second connecting port, the first baffle covers part of the first air inlet, and the second baffle covers part of the second air inlet, so that normal ventilation and heat dissipation are achieved; when the temperature in the heat dissipation cavity is too high and the temperature in the installation cavity is normal, the first memory alloy is deformed and elongated, the first spring and the second spring are both compressed, the first air inlet is connected to the first connecting port, and the second baffle covers the second connecting port, so that outside air enters the heat dissipation cavity to accelerate heat dissipation; when the temperatures in the heat dissipation cavity and the installation cavity are too high, the first memory alloy and the second memory alloy are both deformed and elongated, the first spring and the second spring are both compressed, the first air inlet is connected to the first connecting port, and the second air inlet is connected to the second connecting port, so that normal heat dissipation is achieved.

[0026] Preferably, it also includes a first warning light and a first sliding ring, the first warning light is fixedly connected to the outer wall of the shell, the first sliding ring is arranged on the outer periphery of the first spring, the first sliding ring is fixedly connected to the first movable plate, the outer wall of the first sliding ring is fixedly connected with a first moving contact piece, the groove wall of the first fixed groove is fixedly connected with a first fixed contact piece and a second fixed contact piece, the second fixed contact piece is arranged at the bottom of the first fixed groove near the first fixed contact piece, when the first moving contact piece is electrically connected to the first fixed contact piece, the first warning light lights up yellow, and when the first moving contact piece is electrically connected to the second fixed contact piece, the first warning light lights up red.

[0027] By adopting the above technical solution, when the temperature in the heat dissipation cavity is too high and the temperature in the installation cavity is normal, the first warning light lights up yellow; when the temperature in the heat dissipation cavity and the temperature in the installation cavity are both too high, the first warning light lights up red, alerting the operator that the inverter temperature is too high.

[0028] Preferably, it also includes a first heat-conducting column, the bottom of the first fixed groove is provided with a first sliding opening, the first heat-conducting column is arranged on the inner periphery of the first spring, the first heat-conducting column is slidably connected to the inner wall of the first sliding opening, the first heat-conducting column is used to abut against the alloy plate, and the first movable plate is set as a metal plate.

[0029] By adopting the above technical solution, the first heat-conducting column abuts against the alloy plate, which is easy to conduct heat, stabilize the state of the first memory alloy, reduce the probability of the first memory alloy being damaged due to repeated deformation, and extend the service life of the first memory alloy.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] The alloy plate is easy to conduct heat, and the rotation of the fan allows the outside air to enter the heat dissipation cavity from the first air inlet, and then be discharged from the air outlet through the first air vent, which is convenient for heat dissipation of the alloy plate, thereby realizing heat dissipation of the inverter and improving heat dissipation efficiency;

[0032] When the temperatures of the heat dissipation cavity and the installation cavity are both normal, the first abutment plate abuts against the second abutment plate, the first air inlet is connected to the first connecting port, the second air inlet is connected to the second connecting port, the first baffle plate blocks part of the first air inlet, and the second baffle plate blocks part of the second air inlet, so that normal ventilation and heat dissipation are achieved; when the temperature in the heat dissipation cavity is too high and the temperature in the installation cavity is normal, the first memory alloy is deformed and elongated, the first spring and the second spring are both compressed, the first air inlet is connected to the first connecting port, and the second baffle plate covers the second connecting port, so that the outside air enters the heat dissipation cavity to accelerate heat dissipation; when the temperatures in the heat dissipation cavity and the installation cavity are both too high, the first memory alloy and the second memory alloy are both deformed and elongated, the first spring and the second spring are both compressed, the first air inlet is connected to the first connecting port, and the second air inlet is connected to the second connecting port, so that normal heat dissipation is achieved;

[0033] When the temperature in the heat dissipation cavity is too high and the temperature in the installation cavity is normal, the first warning light will light up yellow. When the temperature in both the heat dissipation cavity and the installation cavity are too high, the first warning light will light up red, alerting operators that the inverter temperature is too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the inverter.

[0035] Figure 2 This is a schematic diagram of the internal structure of the inverter after it is cut open.

[0036] Figure 3 It is a schematic diagram of the internal structure of the first control component and the second control component after being cut open.

[0037] Figure 4 is a cross-sectional view of the first control assembly.

[0038] Figure 5 is a cross-sectional view of the second control assembly.

[0039] Description of reference numerals: 1. Shell; 11. Accommodating groove; 111. First vent; 112. Second vent; 113. Control groove; 12. Accommodating cavity; 121. Heat dissipation cavity; 122. Mounting cavity; 13. Fixing cavity; 14. First air inlet; 15. Second air inlet; 16. Air outlet; 2. Cover plate; 21. Limiting groove; 211. Through-hole; 3. Main body; 31. Panel; 32. Control board; 33. Plug-in; 34. Alloy plate; 35. Inverter; 36. Drive board; 37. Capacitor; 38. Control line; 4. Heat dissipation assembly; 41. Fan; 42. Dustproof net; 43. Filter; 44. First baffle; 441. First connecting port; 45. Second baffle; 451. Second connecting port; 5. First control assembly; 51. First fixing plate; 511, first fixed groove; 512, first fixed contact piece; 513, second fixed contact piece; 514, first sliding opening; 52, first spring; 53, first movable plate; 54, first memory alloy; 55, first connecting rod; 56, first abutment plate; 57, first warning light; 58, first sliding ring; 581, first moving contact piece; 59, first heat-conducting column; 6, second control component; 61, second fixed plate; 611, second fixed groove; 612, third fixed contact piece; 613, fourth fixed contact piece; 614, second sliding opening; 62, second spring; 63, second movable plate; 64, second memory alloy; 65, second connecting rod; 66, second abutment plate; 67, second warning light; 68, second sliding ring; 681, second moving contact piece; 69, second heat-conducting column. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 -,5 further describes this application in detail.

[0041] The present application embodiment discloses a frequency converter. Figure 1 and Figure 2 The inverter includes a shell 1, a cover plate 2, a main body 3, a heat dissipation component 4, a first control component 5 and a second control component 6. The main body 3 includes a panel 31, a control board 32, a plug-in 33, an alloy plate 34, an inverter 35, a drive board 36, a capacitor 37 and a control line 38.

[0042] Reference Figure 2 A receiving groove 11 is provided on one side of the housing 1. The four corners of the cover plate 2 are detachably connected to the housing 1 by bolts. The cover plate 2 is used to cover the notch of the receiving groove 11. The cover plate 2 and the housing 1 together form a receiving cavity 12. A limiting groove 21 is provided at one end of the cover plate 2 away from the housing 1. A through hole 211 is provided at the bottom of the limiting groove 21. A panel 31 is fixedly embedded in the limiting groove 21. A control board 32 is fixedly connected to one end of the cover plate 2 facing the bottom of the receiving groove 11. The panel 31 is electrically connected to the control board 32 through a plug-in 33. The plug-in 33 passes through the through hole 211.

[0043] The alloy plate 34 is fixedly connected to the groove wall of the accommodating groove 11, and the alloy plate 34 divides the accommodating cavity 12 into a heat dissipation cavity 121 and an installation cavity 122. The installation cavity 122 is arranged on the side of the alloy plate 34 facing the cover plate 2. The inverter 35 is welded to the end of the alloy plate 34 away from the bottom of the accommodating groove 11. The inverter 35 is fixedly connected to one side of the driving board 36, and the capacitor 37 is fixedly connected to the other side of the driving board 36. The control board 32 is electrically connected to the driving board 36 through the control line 38.

[0044] Reference Figure 2 The heat dissipation assembly 4 includes a fan 41, a dust screen 42, a filter screen 43, a first baffle 44 and a second baffle 45. The housing 1 is provided with a fixed cavity 13, and the groove wall of the receiving groove 11 is provided with a first vent 111 and a second vent 112. The first vent 111 is connected to the heat dissipation cavity 121 and the fixed cavity 13, and the second vent 112 is connected to the installation cavity 122 and the fixed cavity 13. One end of the housing 1 is provided with a first air inlet 14 and a second air inlet 15, and the other end of the housing 1 is provided with an air outlet 16, and the air outlet 16 is connected to the fixed cavity 13, the first air inlet 14 is connected to the heat dissipation cavity 121, and the second air inlet 15 is connected to the installation cavity 122.

[0045] The fan 41 is fixedly connected to the inner wall of the fixed cavity 13, the first vent 111 and the second vent 112 are both facing the air inlet of the fan 41, and the air outlet of the fan 41 is facing the air outlet 16. The dustproof net 42 is fixedly connected to the outer wall of the housing 1, and the dustproof net 42 covers the first air inlet 14 and the second air inlet 15. The filter 43 is fixedly connected to the outer wall of the housing 1, and the filter 43 covers the air outlet 16.

[0046] Reference Figure 2 The first baffle 44 and the second baffle 45 are both slidably connected to the groove wall of the accommodating groove 11, and the sliding directions of the first baffle 44 and the second baffle 45 are parallel to the groove depth direction of the accommodating groove 11. The first baffle 44 is provided with a first connecting port 441, and the first baffle 44 slides to control the connection between the first air inlet 14 and the first connecting port 441. The second baffle 45 is provided with a second connecting port 451, and the second baffle 45 slides to control the connection between the second air inlet 15 and the second connecting port 451.

[0047] There are multiple first air inlet ports 14, which are evenly spaced apart along the depth direction of the accommodating groove 11; there are multiple first connecting ports 441, which are arranged one-to-one with the first air inlet ports 14; there are multiple second air inlet ports 15, which are evenly spaced apart along the depth direction of the accommodating groove 11; there are multiple second connecting ports 451, which are arranged one-to-one with the second air inlet ports 15.

[0048] Reference Figure 1 and Figure 3The first control assembly 5 includes a first fixed plate 51 , a first spring 52 , a first movable plate 53 , a first memory alloy 54 , a first connecting rod 55 , a first abutting plate 56 , a first warning light 57 , a first sliding ring 58 and a first heat-conducting column 59 .

[0049] Reference Figure 2 and Figure 3 The first fixed plate 51 is fixedly connected to the groove wall of the accommodating groove 11, and the first fixed plate 51 is arranged between the first baffle 44 and the alloy plate 34. The end of the first fixed plate 51 facing away from the alloy plate 34 is provided with a first fixed groove 511, one end of the first spring 52 is fixedly connected to the groove bottom of the first fixed groove 511, and the other end of the first spring 52 is fixedly connected to the first movable plate 53, and the first movable plate 53 is slidably connected to the groove wall of the first fixed groove 511, one end of the first memory alloy 54 is fixedly connected to the first movable plate 53, and the other end of the first memory alloy 54 is fixedly connected to one end of the first connecting rod 55, and the other end of the first connecting rod 55 is fixedly connected to the second baffle 45.

[0050] Reference Figure 1 and Figure 4 The first warning light 57 is fixedly connected to the outer wall of the shell 1, the first sliding ring 58 is arranged on the outer periphery of the first spring 52, the first sliding ring 58 is fixedly connected to the first movable plate 53, the outer wall of the first sliding ring 58 is fixedly connected with the first moving contact piece 581, the groove wall of the first fixed groove 511 is fixedly connected with the first fixed contact piece 512 and the second fixed contact piece 513, the second fixed contact piece 513 is arranged at the bottom of the first fixed contact piece 512 close to the first fixed groove 511, when the first moving contact piece 581 is electrically connected to the first fixed contact piece 512, the first warning light 57 lights up yellow, and when the first moving contact piece 581 is electrically connected to the second fixed contact piece 513, the first warning light 57 lights up red.

[0051] Reference Figure 2 and Figure 4 A first sliding opening 514 is provided at the bottom of the first fixed groove 511, a first heat-conducting column 59 is provided on the inner periphery of the first spring 52, the first heat-conducting column 59 is fixedly connected to the first movable plate 53, the first heat-conducting column 59 is slidably connected to the inner wall of the first sliding opening 514, the first heat-conducting column 59 is used to abut against the alloy plate 34, and the first movable plate 53 is set as a metal plate.

[0052] Reference Figure 1 and Figure 3 The second control assembly 6 includes a second fixed plate 61, a second spring 62, a second movable plate 63, a second memory alloy 64, a second connecting rod 65, a second abutting plate 66, a second warning light 67, a second sliding ring 68 and a second heat-conducting column 69.

[0053] Reference Figure 2 and Figure 3The second fixed plate 61 is fixedly connected to the groove wall of the accommodating groove 11, the second fixed plate 61 is arranged between the second baffle plate 45 and the driving plate 36, and the end of the second fixed plate 61 away from the driving plate 36 is provided with a second fixed groove 611, one end of the second spring 62 is fixedly connected to the groove bottom of the second fixed groove 611, the other end of the second spring 62 is fixedly connected to the second movable plate 63, one end of the second memory alloy 64 is fixedly connected to the second movable plate 63, the other end of the second memory alloy 64 is fixedly connected to one end of the second connecting rod 65, and the other end of the second connecting rod 65 is fixedly connected to the first baffle plate 44.

[0054] Reference Figure 1 and Figure 5 The second warning light 67 is fixedly connected to the outer wall of the shell 1, the second sliding ring 68 is arranged on the outer periphery of the second spring 62, the second sliding ring 68 is fixedly connected to the second movable plate 63, the outer wall of the second sliding ring 68 is fixedly connected with the second moving contact piece 681, the groove wall of the second fixed groove 611 is fixedly connected with the third fixed contact piece 612 and the fourth fixed contact piece 613, the fourth fixed contact piece 613 is arranged at the bottom of the third fixed contact piece 612 close to the second fixed groove 611, when the second moving contact piece 681 is electrically connected to the third fixed contact piece 612, the second warning light 67 lights up yellow, and when the second moving contact piece 681 is electrically connected to the fourth fixed contact piece 613, the second warning light 67 lights up red.

[0055] Reference Figure 2 and Figure 5 A second sliding opening 614 is provided at the bottom of the second fixed groove 611, a second heat-conducting column 69 is provided on the inner periphery of the second spring 62, the second heat-conducting column 69 is fixedly connected to the second movable plate 63, the second heat-conducting column 69 is slidably connected to the inner wall of the second sliding opening 614, the second heat-conducting column 69 is used to abut the driving plate 36, and the second movable plate 63 is set as a metal plate.

[0056] Reference Figure 2 and Figure 3 A control groove 113 is provided on the groove wall of the accommodating groove 11, and the control groove 113 is provided between the first air inlet 14 and the second air inlet 15. The control groove 113 is used for allowing the first connecting rod 55 and the second connecting rod 65 to pass through. The first abutment plate 56 is fixedly connected to one end of the first connecting rod 55 facing the second connecting rod 65, and the second abutment plate 66 is fixedly connected to one end of the second connecting rod 65 facing the first connecting rod 55. The first abutment plate 56 and the second abutment plate 66 are both provided in the control groove 113. The first abutment plate 56 is provided on the side of the second abutment plate 66 away from the groove bottom of the accommodating groove 11. The first abutment plate 56 and the second abutment plate 66 abut against each other. In the initial state, the distance from the first abutment plate 56 to the first fixed plate 51 is equal to the distance from the second abutment plate 66 to the second fixed plate 61.

[0057] When the ambient temperature rises to the deformation temperature, the first memory alloy 54 and the second memory alloy 64 are deformed and extended. In the initial state, half of the first connecting port 441 is connected to half of the first air inlet 14, and half of the second connecting port 451 is connected to half of the second air inlet 15; when the temperature of the heat dissipation cavity 121 rises but the temperature of the installation cavity 122 is normal, the first connecting port 441 is completely connected to the first air inlet 14, and the second baffle 45 blocks the second air inlet 15; when the temperature of the installation cavity 122 rises but the temperature of the heat dissipation cavity 121 is normal, the second connecting port 451 is completely connected to the second air inlet 15, and the first baffle 44 blocks the first air inlet 14; when the temperatures of the heat dissipation cavity 121 and the installation cavity 122 both rise, the first connecting port 441 is connected to the first air inlet 14, the second connecting port 451 is connected to the second air inlet 15, the first heat conducting column 59 abuts the alloy plate 34, and the second heat conducting column 69 abuts the drive plate 36.

[0058] The implementation principle of the frequency converter of the embodiment of the present application is as follows: in the initial state, half of the first connecting port 441 is connected to half of the first air inlet 14, and half of the second connecting port 451 is connected to half of the second air inlet 15; when the temperature of the heat dissipation cavity 121 rises but the temperature of the installation cavity 122 is normal, the first connecting port 441 is completely connected to the first air inlet 14, and the second baffle 45 blocks the second air inlet 15; when the temperature of the installation cavity 122 rises but the temperature of the heat dissipation cavity 121 is normal, the second connecting port 441 is completely connected to the first air inlet 14, and the second baffle 45 blocks the second air inlet 15; The through port 451 is completely connected to the second air inlet 15, the first baffle 44 blocks the first air inlet 14, and the first warning light 57 and the second warning light 67 light up yellow; when the temperatures of the heat dissipation cavity 121 and the installation cavity 122 both rise, the first connecting port 441 is connected to the first air inlet 14, the second connecting port 451 is connected to the second air inlet 15, the first thermal conductive column 59 abuts against the alloy plate 34, the second thermal conductive column 69 abuts against the drive plate 36, and the first warning light 57 and the second warning light 67 light up red.

[0059] 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. A frequency converter, characterized in that: The invention comprises a housing (1), a cover plate (2), an alloy plate (34), an inverter (35), a drive plate (36), a capacitor (37) and a fan (41); a receiving groove (11) is provided on one side of the housing (1); the cover plate (2) is detachably connected to the housing (1); the cover plate (2) is used to cover the notch of the receiving groove (11); the cover plate (2) and the housing (1) together form a receiving cavity (12); the alloy plate (34) is fixedly connected to the groove wall of the receiving groove (11); the alloy plate (34) divides the receiving cavity (12) into a heat dissipation cavity (121) and an installation cavity (122); the installation cavity (122) is provided on a side of the alloy plate (34) facing the cover plate (2); the inverter (35) is fixedly connected to a groove of the alloy plate (34) facing away from the receiving groove (11). The inverter (35) is connected to one side of the drive board (36), the capacitor (37) is connected to the other side of the drive board (36), the housing (1) is provided with a fixed cavity (13), the groove wall of the accommodating groove (11) is provided with a first vent (111), the two ends of the housing (1) are respectively provided with a first air inlet (14) and an air outlet (16), the first air inlet (111) and the first air inlet (14) are both connected to the heat dissipation cavity (121), the first air inlet (111) and the air outlet (16) are connected to the fixed cavity (13), the fan (41) is fixedly connected to the inner wall of the fixed cavity (13), the first air inlet (111) is directly opposite to the air inlet of the fan (41), and the air outlet of the fan (41) is directly opposite to the air outlet (16); It also includes a control board (32) and a control line (38), wherein the control board (32) is fixedly connected to one end of the cover plate (2) facing the drive board (36), and the control board (32) is electrically connected to the drive board (36) via the control line (38); A second vent (112) is provided on the groove wall of the containing groove (11), a second air inlet (15) is provided on the outer wall of the shell (1), the second vent (112) and the second air inlet (15) are both connected to the installation cavity (122), the second vent (112) is connected to the fixing cavity (13), and the second vent (112) faces the air inlet of the fan (41); It also comprises a first baffle (44) and a second baffle (45), the first baffle (44) and the second baffle (45) are both slidably connected to the groove wall of the accommodating groove (11), the first baffle (44) is provided with a first communication port (441), the first baffle (44) slides to control the communication between the first air inlet (14) and the first communication port (441), the second baffle (45) is provided with a second communication port (451), the second baffle (45) slides to control the communication between the second air inlet (15) and the second communication port (451); A plurality of first air inlets (14) are provided, and the plurality of first air inlets (14) are evenly spaced along the groove depth direction of the containing groove (11); a plurality of first connecting ports (441) are provided, and the first connecting ports (441) are arranged in a one-to-one correspondence with the first air inlets (14); a plurality of second air inlets (15) are provided, and the plurality of second air inlets (15) are evenly spaced along the groove depth direction of the containing groove (11); a plurality of second connecting ports (451) are provided, and the second connecting ports (451) are arranged in a one-to-one correspondence with the second air inlets (15); It also comprises a first fixed plate (51), a first spring (52), a first movable plate (53), a first memory alloy (54), a first connecting rod (55), a second fixed plate (61), a second spring (62), a second movable plate (63), a second memory alloy (64), a second connecting rod (65), a first abutting plate (56) and a second abutting plate (66); a groove wall of the accommodating groove (11) is provided with a control groove (113); the control groove (113) is provided between the first air inlet (14) and the second air inlet (15); the control groove (113) is used for allowing the first connecting rod (55) and the second connecting rod (65) to pass through; The first fixing plate (51) is fixedly connected to the groove wall of the accommodating groove (11); the first fixing plate (51) is arranged between the groove bottom of the accommodating groove (11) and the alloy plate (34); a first fixing groove (511) is arranged at one end of the first fixing plate (51) away from the alloy plate (34); one end of the first spring (52) is fixedly connected to the groove bottom of the first fixing groove (511); the other end of the first spring (52) is fixedly connected to the first movable plate (53); one end of the first memory alloy (54) is fixedly connected to the first movable plate (53); the other end of the first memory alloy (54) is fixedly connected to one end of a first connecting rod (55); and the other end of the first connecting rod (55) is fixedly connected to the second baffle (45); The second fixing plate (61) is fixedly connected to the groove wall of the accommodating groove (11); the second fixing plate (61) is arranged between the control plate (32) and the driving plate (36); a second fixing groove (611) is arranged at one end of the second fixing plate (61) away from the driving plate (36); one end of the second spring (62) is fixedly connected to the groove bottom of the second fixing groove (611); the other end of the second spring (62) is fixedly connected to the second movable plate (63); one end of the second memory alloy (64) is fixedly connected to the second movable plate (63); the other end of the second memory alloy (64) is fixedly connected to one end of a second connecting rod (65); and the other end of the second connecting rod (65) is fixedly connected to the first baffle (44); The first abutment plate (56) is fixedly connected to one end of the first connecting rod (55) facing the second connecting rod (65), and the second abutment plate (66) is fixedly connected to one end of the second connecting rod (65) facing the first connecting rod (55). The first abutment plate (56) is arranged on a side of the second abutment plate (66) away from the bottom of the accommodating groove (11). The first abutment plate (56) and the second abutment plate (66) abut against each other. When the ambient temperature rises to the deformation temperature, the first memory alloy (54) and the second memory alloy (64) deform and elongate.

2. The frequency converter according to claim 1, characterized in that: It also comprises a panel (31) and a plug-in unit (33); a limit groove (21) is provided at one end of the cover plate (2) facing away from the housing (1); a through opening (211) is provided at the bottom of the limit groove (21); the panel (31) is fixedly embedded in the limit groove (21); the panel (31) is electrically connected to the control board (32) via the plug-in unit (33); and the plug-in unit (33) passes through the through opening (211).

3. The frequency converter according to claim 1, characterized in that: It also comprises a dustproof net (42), the dustproof net (42) being fixedly connected to the outer wall of the housing (1), the dustproof net (42) covering the first air inlet (14) and the second air inlet (15).

4. The frequency converter according to claim 1, characterized in that: The invention also comprises a first warning light (57) and a first sliding ring (58), wherein the first warning light (57) is fixedly connected to the outer wall of the housing (1), the first sliding ring (58) is arranged on the outer periphery of the first spring (52), the first sliding ring (58) is fixedly connected to the first movable plate (53), the outer wall of the first sliding ring (58) is fixedly connected to a first moving contact piece (581), the groove wall of the first fixed groove (511) is fixedly connected to a first fixed contact piece (512) and a second fixed contact piece (513), the second fixed contact piece (513) is arranged at the groove bottom of the first fixed contact piece (512) close to the first fixed groove (511), when the first moving contact piece (581) is electrically connected to the first fixed contact piece (512), the first warning light (57) lights up yellow, and when the first moving contact piece (581) is electrically connected to the second fixed contact piece (513), the first warning light (57) lights up red.

5. The frequency converter according to claim 1, characterized in that: It also includes a first heat-conducting column (59), the bottom of the first fixed groove (511) is provided with a first sliding opening (514), the first heat-conducting column (59) is arranged on the inner periphery of the first spring (52), the first heat-conducting column (59) is slidably connected to the inner wall of the first sliding opening (514), the first heat-conducting column (59) is used to abut against the alloy plate (34), and the first movable plate (53) is set as a metal plate.

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