A frequency converter

Abstract

The utility model relates to the technical field of frequency converter, specifically relates to a frequency converter. A kind of frequency converter, comprising: heat dissipation shell, the heat dissipation shell is equipped with containing space, the containing space is provided with the heat conduction piece for the heat conduction of heating device, the heat conduction piece is used to conduct heat to the heat dissipation shell;Face cover assembly, the face cover assembly includes cover plate, and the cover plate is sealed with heat dissipation shell arrangement.The utility model provides a kind of frequency converter, to solve in high protection level scene, frequency converter and the device need to do waterproof treatment, and a large number of heating elements are arranged inside frequency converter, the heat dissipation of frequency converter usually needs to be assisted by air cooling or water cooling, and the inlet and outlet air hole or inlet and outlet liquid hole are arranged on shell, cannot meet both high heat dissipation requirement and high protection level requirement problem.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and specifically to a frequency converter. Background Technology

[0002] In the logistics and warehousing industry, the conveyor system is the core subsystem of the automated warehouse. It is a key piece of equipment that performs functions such as goods entering and leaving the warehouse, conveying and handling, verification and packaging, and information processing. It is required to be able to operate stably for a long time and have high reliability.

[0003] In cold storage, chemical, food and beverage and other scenarios, high protection levels (mainly waterproof and dustproof) are required. Devices such as frequency converters need to be waterproofed. Frequency converters have a large number of heat-generating components inside. The heat dissipation of frequency converters usually relies on air cooling or water cooling. Air inlet and outlet holes or liquid inlet and outlet holes are arranged on the casing. It is impossible to meet both the high heat dissipation requirements and the high protection level requirements. Utility Model Content

[0004] In view of this, the present invention provides a frequency converter to solve the problem of not being able to meet both high heat dissipation requirements and high protection level requirements.

[0005] In a first aspect, this utility model provides a frequency converter, comprising: A heat dissipation housing has an internal receiving space, and the receiving space is provided with a heat-conducting component for conducting heat to the heat-generating device. The heat-conducting component is used to conduct heat to the heat dissipation housing. A faceplate assembly, the faceplate assembly including a cover plate, the cover plate being sealed to the heat sink housing.

[0006] This application provides a receiving space within the heat dissipation housing, and the receiving space is equipped with a heat-conducting component for conducting heat to the heat-generating device. The heat generated by the heat-generating device in the receiving space can be directly conducted to the heat dissipation housing through the heat dissipation housing, and then the heat is conducted to the external environment for heat dissipation. Therefore, it is not necessary to set up air-cooling or water-cooling channels on the heat dissipation housing and in the receiving space. In this way, by sealing the heat dissipation housing with a cover plate, the protection level of the frequency converter can be set to a high protection level, so that the frequency converter of this application meets both the high heat dissipation requirements and the high protection level requirements.

[0007] In one optional embodiment, the heat-conducting component includes a first heat-conducting component and a second heat-conducting component; the first heat-conducting component is used to conduct the heat generated by the first heating device to the heat dissipation housing, and the second heat-conducting component is used to conduct the heat generated by the second heating device to the heat dissipation housing, wherein the heat generated by the first heating device is greater than the heat generated by the second heating device.

[0008] In one optional embodiment, the first heat-conducting element is configured as a heat-conducting plate integrally formed with the heat dissipation housing, and a plurality of heat dissipation fins are provided on the outer side of the heat dissipation housing corresponding to the position of the heat-conducting plate.

[0009] In one alternative embodiment, the second thermally conductive element is configured as an insulating thermally conductive pad fixed within the receiving space.

[0010] In one alternative embodiment, a drive assembly is further included within the receiving space. The drive assembly includes a PCB board and the heating element mounted on the PCB board. The heating element is mounted on a first side of the PCB board and disposed close to the heat-conducting component.

[0011] In one optional embodiment, the accommodating space is further provided with an AC switch and connecting rod, and an intermediate relay; the AC switch and connecting rod and the intermediate relay are all mounted on the heat dissipation housing, and the intermediate relay extends from the first side of the PCB board to the second side of the PCB board, and the intermediate relay is connected to a terminal assembly on the PCB board.

[0012] In one alternative embodiment, the system further includes a control component and an insulating isolator. The control component includes a control board disposed above the drive component, and the insulating isolator is used to at least cover the AC switch and linkage, the intermediate relay, and the terminal assembly.

[0013] In one optional embodiment, the insulating isolation component includes a horizontal plate and a vertical plate arranged vertically. The horizontal plate has a first adhesive strip on the side opposite to the vertical plate, and the vertical plate has a second adhesive strip extending from the side opposite to the horizontal plate. The first adhesive strip is bonded to the heat dissipation housing, and the second adhesive strip is bonded to the surface of the control board.

[0014] In one optional embodiment, a sealing groove is provided on the top surface of the side wall of the heat dissipation housing, and a sealing strip is contained in the sealing groove. A keyboard portion is provided on the outer surface of the cover plate, and a hydrophobic film is attached to the keyboard portion. The front of the cover plate is provided with the keyboard portion and a switch handle, and the back of the cover plate is provided with a knob to fix the switch handle to the cover plate.

[0015] In one optional embodiment, the first sidewall of the heat dissipation housing is provided with a plurality of adapter holes, the inner surface of the first sidewall is provided with an adapter plate, and the outer surface of the first sidewall is provided with an aviation plug plate. The connecting end of the adapter plate passes through the adapter holes and is connected to the aviation plug plate. The first sidewall of the heat dissipation housing is also provided with an aviation plug hole, and an aviation plug is inserted into the aviation plug hole. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the frequency converter according to an embodiment of the present utility model; Figure 2 This is an exploded view of the frequency converter according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the heat dissipation housing according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the heat dissipation housing, drive assembly, and sealing strip according to an embodiment of the present utility model; Figure 5 This is a schematic diagram showing the direction of the drive component toward the bottom surface of the receiving space in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the heat dissipation housing and drive assembly according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the control components according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the heat dissipation housing, drive assembly, and control assembly according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the insulating isolation component according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the heat dissipation housing, drive assembly, control assembly, and insulating isolation component according to an embodiment of the present utility model; Figure 11 This is a schematic diagram of the heat dissipation housing, drive assembly, control assembly, insulating isolation component, and adapter plate according to an embodiment of the present utility model; Figure 12 This is a schematic diagram of the adapter plate according to an embodiment of the present utility model; Figure 13 This is a schematic diagram of an aviation insert plate according to an embodiment of the present utility model; Figure 14 This is a schematic diagram of the upper surface of the panel assembly according to an embodiment of the present utility model; Figure 15 This is a schematic diagram of the lower surface of the panel assembly according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Faceplate assembly; 101. Cover plate; 102. Keyboard section; 103. Switch handle; 104. Knob; 2. Heat sink housing; 201. Heat dissipation space; 202. Heat dissipation fins; 203. First receiving space; 204. Second receiving space; 205. Third receiving space; 206. Heat-conducting plate; 207. First insulating heat-conducting pad; 208. Second insulating heat-conducting pad; 209. Adapter hole; 210. Aviation insertion hole; 211. Sealing groove; 212. First sidewall; 213. Grounding terminal; 214. Fastening hole; 3. Drive 301. Moving components; 301. PCB board; 3011. First side; 302. Capacitor; 303. MOSFET; 304. IGBT module; 305. Receiving hole; 306. Intermediate relay; 4. Control components; 401. Control board; 402. Control bracket; 403. Expansion card; 5. Insulating isolation components; 501. Horizontal plate; 502. Vertical plate; 503. First adhesive strip; 504. Second adhesive strip; 6. Adapter board; 7. Sealing strip; 8. AC switch and connecting rod; 9. Low voltage area; 10. Aviation plug board; 11. Aviation connector. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] The following is combined Figures 1 to 15 The following describes embodiments of the present invention.

[0021] According to an embodiment of the present invention, in one aspect, a frequency converter is provided, comprising: a heat dissipation housing 2, wherein the heat dissipation housing 2 is provided with a receiving space, and the receiving space is provided with a heat-conducting component for conducting heat to a heat-generating device, the heat-conducting component being used to conduct heat to the heat dissipation housing 2; and a cover assembly 1, wherein the cover assembly 1 includes a cover plate 101, the cover plate 101 being sealed to the heat dissipation housing 2.

[0022] This application provides a receiving space within the heat dissipation housing 2, and the receiving space is equipped with a heat-conducting component for conducting heat to the heat-generating device. The heat generated by the heat-generating device in the receiving space can be directly conducted to the heat dissipation housing 2 through the heat dissipation housing 2, and then the heat is conducted to the external environment for heat dissipation. Therefore, it is not necessary to set up air-cooling or water-cooling channels on the heat dissipation housing 2 and in the receiving space. In this way, by sealing the heat dissipation housing 2 with the cover plate 101, the protection level of the frequency converter can be set to a high protection level, so that the frequency converter of this application meets both the high heat dissipation requirements and the high protection level requirements.

[0023] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the heat-conducting component includes a first heat-conducting component and a second heat-conducting component. The first heat-conducting component conducts the heat generated by the first heating element to the heat sink 2, and the second heat-conducting component conducts the heat generated by the second heating element to the heat sink 2. The heat generated by the first heating element is greater than the heat generated by the second heating element. The first heat-conducting component quickly transfers the heat generated by the first heating element to the heat sink 2, and the second heat-conducting component transfers the heat generated by the second heating element to the heat sink 2.

[0024] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first heat-conducting component is a heat-conducting plate 206 integrally formed with the heat dissipation housing 2. Corresponding to the position of the heat-conducting plate 206, the outer surface of the heat dissipation housing 2 is provided with several heat dissipation fins 202. The bottom of the heat dissipation housing 2 is provided with a heat dissipation space 201, which is U-shaped. The heat dissipation fins 202 are arranged along the length of the heat dissipation space 201. The U-shaped heat dissipation space 201 increases the heat dissipation area at the bottom of the heat dissipation housing 2. The heat dissipation fins 202 are arranged along the length of the heat dissipation space 201. Figure 4 The heat dissipation efficiency is improved by dissipating the heat inside the heat sink 2 through the heat dissipation fins 202 (in the Y direction). In this embodiment, the first heat-generating device is the IGBT module 304. Since the IGBT module 304 generates a large amount of heat during operation, a heat-conducting plate 206 integrally formed with the heat sink 206 is provided to conduct heat to the IGBT module 304. When the IGBT module 304 is installed, it can be closely attached to the heat-conducting plate 206, and the heat can be directly conducted to the heat sink 2. In addition, the heat dissipation fins 202 are provided on the outer side of the heat sink 202, which can quickly conduct the heat to the external environment.

[0025] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the second heat-conducting component is configured as an insulating thermally conductive pad fixed within the accommodating space. It should be noted that the insulating thermally conductive pad includes a first insulating thermally conductive pad 207 and a second insulating thermally conductive pad 208. In this embodiment, the second heat-generating device is another relatively low-heat-generating device on the PCB board of the drive assembly, including but not limited to capacitors and MOSFETs. Since the second heat-generating device is generally an electrical component, and the heat sink 2 is generally a die-cast aluminum heat sink, an insulating thermally conductive pad is required to achieve the effect of insulating and conducting heat.

[0026] In one embodiment, such as Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, it also includes a drive assembly 3 installed in the accommodating space. The drive assembly 3 includes a PCB board 301 and a heat-generating device installed on the PCB board 301. The heat-generating device is installed on the first side 3011 of the PCB board 301 and is close to the heat-conducting component.

[0027] In this embodiment, as Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the heat dissipation space 201 divides the accommodating space of the heat sink housing 2 into a first accommodating space 203, a second accommodating space 204, and a third accommodating space 205. A first insulating thermally conductive pad 207 and a second insulating thermally conductive pad 208 are provided on the bottom surface of the first accommodating space 203. One or more of the first and second insulating thermally conductive pads 207 and 208 can be provided. Furthermore, a third insulating thermally conductive pad, a fourth insulating thermally conductive pad, etc., can also be provided. The number and type of insulating thermally conductive pads can be determined based on the number of heat-generating devices on the PCB board that have relatively small heat output compared to the IGBT module. The type is determined; a heat-conducting plate 206 is placed on the bottom surface of the second accommodating space 204. The first heat-generating device is an IGBT module 304, and the second heat-generating devices are a MOSFET 303 and a capacitor 302, etc. The PCB board 301 is provided with the IGBT module 304, MOSFET 303 and capacitor 302 on the direction facing the bottom surface of the heat sink 2 (the first side 3011 of the PCB board 301). The IGBT module 304 is correspondingly set with the heat-conducting plate 206, the capacitor 302 is correspondingly set with the first insulating thermal pad 207, and the MOSFET 303 is correspondingly set with the second insulating thermal pad 208. The first insulating thermal pad 207 transfers the heat generated by the capacitor 302 to the heat sink 2, and the second insulating thermal pad 208 transfers the heat generated by the MOSFET 303 (Metal-Oxide-Semiconductor Field-Effect Transistor) to the heat sink 2. In this embodiment, the first insulating thermally conductive pad 207 and the second insulating thermally conductive pad 208 serve the functions of insulation and heat conduction, respectively, and both are made of silicone. In this embodiment, the drive assembly 3 is used to provide power supply and drive settings for the frequency converter, and the PCB board 301 is fixed to the heat sink housing 2 by fasteners. Specifically, the fasteners are screws.

[0028] In one embodiment, such as Figure 6 , Figure 7 and Figure 8As shown, the accommodating space also includes an AC switch and connecting rod 8, and an intermediate relay 306. The AC switch and connecting rod 8, and the intermediate relay 306 are all mounted on the heat dissipation housing 2. The intermediate relay 306 extends from the first side 3011 of the PCB board 301 to the second side of the PCB board 301, and is connected to the terminal assembly on the PCB board 301. The AC switch and connecting rod, and the intermediate relay are standard accessories, providing quick switching between disconnection and connection for the frequency converter, facilitating maintenance and operation. The intermediate relay also provides a switching action for the frequency converter's timing settings.

[0029] In one embodiment, such as Figure 2 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, it also includes a control component 4 and an insulating isolator 5. The control component 4 includes a control board 401, which is located above the drive component 3. The insulating isolator 5 is used to at least cover the AC switch and linkage 8, the intermediate relay 306 and the terminal assembly.

[0030] In this embodiment, as Figure 2 , Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the control component 4 includes a control bracket 402 and an expansion card 403 group. The control bracket 402 is connected to the control board 401. The control bracket 402 has at least two slots, and the expansion card 403 group includes at least two expansion cards 403, with one slot corresponding to one expansion card 403. The expansion cards 403 are electrically connected to the control board 401. In this embodiment, the control bracket 402 has three slots to accommodate up to three expansion cards. The control board 401 provides control performance for the frequency converter. The control bracket 402 is used to fix and limit the expansion cards 403. The expansion cards 403 are electrically connected to the control board 401 through sockets, allowing for customized performance settings for users. The control component 4 is fixed to the welding studs of the drive component 3 by fasteners.

[0031] In this embodiment, as Figure 9 , Figure 10 and Figure 11As shown, the insulating isolation component 5 includes a horizontal plate 501 and a vertical plate 502 arranged vertically. A first adhesive strip 503 is provided on the side of the horizontal plate 501 opposite to the vertical plate 502, and a second adhesive strip 504 extends from the side of the vertical plate 502 opposite to the horizontal plate 501. The first adhesive strip 503 is bonded to the heat sink 2, and the second adhesive strip 504 is bonded to the surface of the control board 401. The area covered by the insulating isolation component 5 is the high-voltage area. Specifically, the insulating isolation component 5 is made of insulating paper. The insulating isolation component 5 divides the area inside the heat sink 2 into a high-voltage area and a low-voltage area 9. That is, the area covered by the insulating isolation component 5 is the high-voltage area, which includes the AC switch 8, the output terminals on the PCB board 301, the intermediate relay 306, etc., while the uncovered area is the low-voltage area 9.

[0032] In one embodiment, such as Figure 3 , Figure 4 As shown, a sealing groove 211 is provided on the top side wall of the heat dissipation housing 2, and a sealing strip 7 is contained in the sealing groove 211. A keyboard part 102 is provided on the outer surface of the cover plate 101, and a hydrophobic film is attached to the keyboard part 102. The front of the cover plate 101 is provided with the keyboard part 102 and the switch handle 103, and the back of the cover plate 101 is provided with a knob 104, which is used to fix the switch handle 103 to the cover plate 101.

[0033] In this embodiment, as Figure 1 , Figure 2 , Figure 14 , Figure 15 As shown, the cover plate 101 is made of die-cast aluminum, providing an aesthetically pleasing appearance. It is fixed to the heat sink housing 2 by fasteners. The keyboard section 102 and the hydrophobic membrane provide human-machine interaction and are fixed to the cover plate 101 by fasteners. The switch handle 103 provides an external switch-off operation and is securely fixed to the cover plate 101 by a knob. Specifically, the knob 104 is a knob nut, and the fastener is a screw. Figure 4 As shown, the sealing strip 7 is interference-fitted into the sealing groove 211, sealing the gap between the heat dissipation housing 2 and the cover plate 101. The hydrophobic membrane prevents water from entering the keyboard section 102. The sealing strip 7 and the hydrophobic membrane together provide better waterproof sealing performance. In this embodiment, the sealing strip 7 is made of a highly elastic material such as silicone rubber, and has interference ribs for limiting and fixing, forming a sealed configuration with the cover plate 101. In this embodiment, as... Figure 4 As shown, the top of the heat sink housing 2 is also provided with a fastening hole 214, and the fastener is inserted into the fastening hole 214 to fix the cover plate 101 to the heat sink housing 2.

[0034] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 11 , Figure 12 and Figure 13 As shown, the first side wall 212 of the heat dissipation housing 2 is provided with a plurality of adapter holes 209, the inner surface of the first side wall 212 is provided with an adapter plate 6, and the outer surface of the first side wall 212 is provided with an aviation plug plate 10. The connecting end of the adapter plate 6 passes through the adapter hole 209 and is connected to the aviation plug plate 10. The first side wall 212 of the heat dissipation housing 2 is also provided with an aviation plug hole 210, and an aviation plug 11 is inserted into the aviation plug hole 210.

[0035] In this embodiment, the aviation insert 10 has waterproof and dustproof properties to prevent external dust and moisture from entering the heat dissipation housing 2. In this embodiment, as... Figure 4 As shown, a grounding terminal 213 is provided at each end of the heat dissipation housing 2. The grounding terminal 213 is used by the user to connect the heat dissipation housing 2 to the ground wire.

[0036] In this embodiment, as Figure 10 , Figure 12 and Figure 13 The adapter board 6 is used to receive the signal output of the control board 401 terminal block. Electrical connection is achieved between the adapter board 6 and the control board 401 terminal block via a socket on the adapter board 6. The selected aviation plug-in board 10 is fixed to the adapter board 6 by welding and is also connected for signal transmission, reducing additional electrical cable wiring. The adapter board 6 and the heat sink housing 2 are fixed by nuts and bolts provided with the standard aviation plug-in board 10. In this embodiment, as... Figure 1 , Figure 2 , Figure 4 As shown, the aviation plug 11 provides users with a quick plug-in and assembly connection function, and the aviation plug 11 has good waterproof and dustproof properties.

[0037] It should be noted that, apart from the adapter hole 209 and the plug hole, the rest of the heat dissipation housing 2 of the frequency converter provided in this application has no holes, so as to play a better protective role.

[0038] The inverter provided by this utility model has the following advantages: (1) The heat sink housing 2 is provided with a receiving space, and the receiving space is provided with a heat-conducting component for heat conduction of the heat-generating device. The heat generated by the heat-generating device in the receiving space can be directly conducted to the heat sink housing 2 through the heat-conducting component, and then the heat is conducted to the external environment for heat dissipation through the heat sink housing 2. Therefore, it is not necessary to set up air-cooled or water-cooled channels on the heat sink housing 2 and in the receiving space. In this way, the inverter protection level can be set to a high protection level by sealing the cover plate 101 with the heat sink housing 2. Thus, the inverter of this application meets both the high heat dissipation requirements and the high protection level requirements. (2) Except for the adapter hole 209 and the plug hole, the rest of the heat dissipation housing 2 has no holes. The adapter hole 209 is equipped with an aviation plug plate 10 and the plug hole is equipped with an aviation plug 11. Both have good waterproof and dustproof functions, preventing water and dust from entering the heat dissipation housing 2 through the adapter hole 209 and the plug hole, thus ensuring the waterproof performance of the entire device; (3) An insulating isolation component 5 is provided to divide the area inside the frequency converter into a high-voltage area and a low-voltage area 9; (4) The "U"-shaped heat dissipation space 201 increases the bottom heat dissipation area of ​​the heat dissipation housing 2. The heat dissipation fins 202 are set along the length of the heat dissipation space 201. Figure 4 (in the Y direction), so that the heat inside the heat sink 2 is dissipated through the heat dissipation fins 202, thereby improving the heat dissipation efficiency.

[0039] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A frequency converter, characterized in that, include: The heat dissipation housing (2) has a receiving space inside, and the receiving space is provided with a heat-conducting component for conducting heat to the heat-generating device. The heat-conducting component is used to conduct heat to the heat dissipation housing (2). A faceplate assembly (1) includes a cover plate (101) which is sealed to a heat sink housing (2).

2. The frequency converter according to claim 1, characterized in that, The heat-conducting component includes a first heat-conducting component and a second heat-conducting component; the first heat-conducting component is used to conduct the heat generated by the first heating device to the heat dissipation shell (2), and the second heat-conducting component is used to conduct the heat generated by the second heating device to the heat dissipation shell (2), wherein the heat generated by the first heating device is greater than the heat generated by the second heating device.

3. The frequency converter according to claim 2, characterized in that, The first heat-conducting component is configured as a heat-conducting plate (206) integrally formed with the heat dissipation housing (2). Corresponding to the position of the heat-conducting plate (206), the outer side of the heat dissipation housing (2) is provided with a plurality of heat dissipation fins (202).

4. The frequency converter according to claim 2, characterized in that, The second thermally conductive element is configured as an insulating thermally conductive pad fixed within the accommodating space.

5. The frequency converter according to claim 1, characterized in that, It also includes a drive assembly (3) installed in the accommodating space. The drive assembly (3) includes a PCB board (301) and a heating device installed on the PCB board (301). The heating device is installed on a first side (3011) of the PCB board (301) and is close to the heat conductor.

6. The frequency converter according to claim 5, characterized in that, The accommodating space is also provided with an AC switch and connecting rod (8) and an intermediate relay (306); the AC switch and connecting rod (8) and the intermediate relay (306) are all installed on the heat sink housing (2), and the intermediate relay (306) passes from the first side (3011) of the PCB board (301) to the second side of the PCB board (301), and the intermediate relay (306) is connected to the terminal assembly on the PCB board (301).

7. The frequency converter according to claim 6, characterized in that, It also includes a control component (4) and an insulating isolator (5). The control component (4) includes a control board (401) located above the drive component (3). The insulating isolator (5) is used to at least cover the AC switch and linkage (8), the intermediate relay (306) and the terminal assembly.

8. The frequency converter according to claim 7, characterized in that, The insulating isolation component (5) includes a horizontal plate (501) and a vertical plate (502) arranged vertically. The horizontal plate (501) is provided with a first adhesive strip (503) on the side away from the vertical plate (502). The vertical plate (502) is provided with a second adhesive strip (504) extending from the side away from the horizontal plate (501). The first adhesive strip (503) is bonded to the heat dissipation housing (2), and the second adhesive strip (504) is bonded to the surface of the control board (401).

9. The frequency converter according to claim 1, characterized in that, The heat dissipation housing (2) has a sealing groove (211) on the top side wall, and the sealing groove (211) contains a sealing strip (7). The outer surface of the cover plate (101) has a keyboard part (102), and a hydrophobic film is pasted on the keyboard part (102). The front of the cover plate (101) has a keyboard part (102) and a switch handle (103), and the back of the cover plate (101) has a knob (104) to fix the switch handle (103) to the cover plate (101).

10. The frequency converter according to claim 1, characterized in that, The heat dissipation housing (2) has a plurality of adapter holes (209) on its first side wall (212), an adapter plate (6) is provided on the inner surface of the first side wall (212), and an aviation plug plate (10) is provided on the outer surface of the first side wall (212). The connecting end of the adapter plate (6) passes through the adapter hole (209) and is connected to the aviation plug plate (10). The heat dissipation housing (2) also has an aviation plug hole (210) on its first side wall (212), and an aviation plug (11) is inserted into the aviation plug hole (210).

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