Frequency converter and power equipment

Abstract

The embodiment of the utility model relates to the technical field of electrical equipment, and particularly discloses a frequency converter and electrical equipment, the frequency converter comprises a shell, a circuit board, a diverter and a heat dissipation assembly, the shell is provided with a containing cavity and a limiting assembly located in the containing cavity, the circuit board is arranged in the containing cavity, the diverter is arranged on the circuit board, and the heat dissipation assembly is arranged in the containing cavity. The heat dissipation assembly is located in the containing cavity, the heat dissipation assembly is connected with the limiting assembly, the heat dissipation assembly is in contact connection with the diverter, and the heat dissipation assembly is used for conducting heat dissipation on the diverter. The heat dissipation assembly is arranged in the shell, so that the area of the circuit board is effectively saved, and the overall size and the manufacturing cost of the frequency converter are reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of power equipment, in particular to a frequency converter and power equipment. BACKGROUND

[0002] As an important component of power equipment, the frequency converter is widely used in industrial control, automatic production line and various occasions requiring speed regulation and energy saving. The frequency converter applies frequency conversion technology and microelectronic technology to control the AC motor by changing the frequency of the motor power supply. Among them, the shunt as an important part of the frequency converter is mainly used for measuring and monitoring the size of the current. The shunt will accumulate heat during work, and the shunt needs to be cooled by the radiator to ensure the normal work of the frequency converter.

[0003] At present, in the frequency converter, the shunt and the radiator for cooling the shunt are usually installed on the circuit board. The radiator installed on the circuit board needs to consider the safety problem and interference problem of the circuit board, resulting in too large size of the circuit board. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiment of the present application provides a frequency converter and power equipment, which is beneficial to reduce the size of the circuit board.

[0005] One of the technical solutions adopted by the present application is to provide a frequency converter, which comprises a shell, a circuit board, a shunt and a heat dissipation assembly. The shell is provided with a receiving cavity, and the shell is provided with a limiting assembly located in the receiving cavity. The circuit board is arranged in the receiving cavity, the shunt is arranged on the circuit board, the heat dissipation assembly is located in the receiving cavity, the heat dissipation assembly is connected with the limiting assembly, the heat dissipation assembly is in contact with the shunt, and the heat dissipation assembly is used for cooling the shunt.

[0006] In some embodiments, the heat dissipation assembly comprises a radiator, the radiator comprises a heat dissipation plate and a plurality of heat dissipation ribs, the heat dissipation plate has a first surface and a second surface, the first surface faces the shunt, the second surface faces away from the shunt, the plurality of heat dissipation ribs are arranged on the second surface of the heat dissipation plate, and two adjacent heat dissipation ribs are arranged at intervals. One end of the heat dissipation rib away from the second surface abuts against the shell.

[0007] In some embodiments, the limiting assembly comprises a first limiting plate and a second limiting plate arranged opposite to each other along a first direction. Along the first direction, the first limiting plate is concavely provided with a first clamping groove, and the second limiting plate is concavely provided with a second clamping groove. Along the arrangement direction of the plurality of heat dissipation ribs, an outermost heat dissipation rib is provided with a first protruding portion, and the first protruding portion is located in the first clamping groove. Along the arrangement direction of the plurality of heat dissipation ribs, another outermost heat dissipation rib is provided with a second protruding portion, and the second protruding portion is located in the second clamping groove.

[0008] In some embodiments, the first limiting plate is provided with a first gap located at one side of the first limiting plate along the second direction, the first gap is communicated with the first clamping groove and is used for allowing the first protrusion to enter or exit the first clamping groove, the second limiting plate is provided with a second gap located at one side of the second limiting plate along the second direction, the second gap is communicated with the second clamping groove and is used for allowing the second protrusion to enter or exit the second clamping groove, and the second direction is perpendicular to the first direction.

[0009] In some embodiments, along the third direction, the width of the first clamping groove is greater than the thickness of the first protrusion, so that the first protrusion can move in the first clamping groove, along the third direction, the width of the second clamping groove is greater than the thickness of the second protrusion, so that the second protrusion can move in the second clamping groove, and the first direction, the second direction and the third direction are perpendicular to each other.

[0010] In some embodiments, the first limiting plate is provided with a third protrusion at the first gap, the third protrusion extends along the third direction, and / or the second limiting plate is provided with a fourth protrusion at the second gap, the fourth protrusion extends along the third direction.

[0011] In some embodiments, the shell is provided with a plurality of heat dissipation through holes located between the first limiting plate and the second limiting plate, and the plurality of heat dissipation through holes are communicated with the accommodation cavity.

[0012] In some embodiments, the heat dissipation assembly further comprises a heat conduction member arranged between the first surface of the heat dissipation plate and the flow divider.

[0013] In some embodiments, the shell comprises a first shell and a second shell, the first shell and the second shell are separably connected, the first shell and the second shell enclose the accommodation cavity, the circuit board is arranged in the first shell, one end of the heat dissipation assembly is arranged in the second shell, and the other end of the heat dissipation assembly abuts against the flow divider.

[0014] Another technical scheme adopted in the present application is to provide an electric power device comprising the above frequency converter.

[0015] The beneficial effects of the embodiments of the present application are that the embodiments of the present application provide a frequency converter and an electric power device, the frequency converter comprises a shell, a circuit board, a flow divider and a heat dissipation assembly, the shell is provided with an accommodation cavity, the shell is provided with a limiting assembly located in the accommodation cavity, the circuit board is arranged in the accommodation cavity, the flow divider is arranged on the circuit board, the heat dissipation assembly is located in the accommodation cavity, the heat dissipation assembly is connected with the limiting assembly, the heat dissipation assembly is in contact with the flow divider, and the heat dissipation assembly is used for dissipating heat of the flow divider. By arranging the heat dissipation assembly in the shell, the area of the circuit board is effectively saved, which is conducive to reducing the overall size and manufacturing cost of the frequency converter. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the drawings without creative labor.

[0017] Figure 1 is a perspective view of a frequency converter provided by the embodiments of the present application;

[0018] Figure 2 is an exploded view of the frequency converter provided by the embodiments of the present application;

[0019] Figure 3 is Figure 1 is a perspective view of the frequency converter along the sectioning line A-A after being sectioned;

[0020] Figure 4 is Figure 3 is a partial enlarged view of the B region in the frequency converter;

[0021] Figure 5 is a perspective view of the heat dissipation assembly provided by the embodiments of the present application from one perspective;

[0022] Figure 6 is a perspective view of the heat dissipation assembly provided by the embodiments of the present application from another perspective;

[0023] Figure 7 is a perspective view of the second shell provided by the embodiments of the present application from one perspective;

[0024] Figure 8 is Figure 7 is a partial enlarged view of the C region in the second shell;

[0025] Figure 9 is a perspective view of the second shell provided by the embodiments of the present application from another perspective;

[0026] Figure 10 is Figure 9 is a partial enlarged view of the D region in the second shell. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, the following will make a more detailed description of the present application in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements can exist therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements can exist therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the specification are only for the purpose of illustration.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used in the description herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] In some embodiments, referring to Figure 1 and Figure 2 , the frequency converter 1000 comprises a housing 1, a circuit board 2, a shunt 3 and a heat dissipation assembly 4. The circuit board 2 and the shunt 3 are both arranged in the housing 1, the shunt 3 is arranged on the circuit board 2, the heat dissipation assembly 4 is arranged in the housing 1, and the heat dissipation assembly 4 is used for dissipating heat for the shunt 3.

[0030] In some embodiments, referring to Figures 2 to 4 The heat dissipation assembly 4 is in contact with the shunt 3.

[0031] In some embodiments, referring to Figures 2 to 4 The housing 1 comprises a first housing 11 and a second housing 12, and the first housing 11 and the second housing 12 enclose a receiving cavity 10, and the circuit board 2 and the shunt 3 are located in the receiving cavity 10. The circuit board 2 is arranged in the first housing 11, one end of the heat dissipation assembly 4 is arranged in the second housing 12, and the other end of the heat dissipation assembly 4 abuts against the shunt 3. The first housing 11 and the second housing 12 are detachably connected, and the first housing 11 and the second housing 12 are fastened by a buckle structure or a screw, so as to facilitate disassembly and maintenance of the internal components of the housing 1.

[0032] In some embodiments, the first housing 11 and the second housing 12 are both made of plastic.

[0033] In some embodiments, the number of shunts 3 is one or more, and each shunt 3 is in contact with the heat dissipation assembly 4 for heat dissipation.

[0034] In some embodiments, referring to Figures 4 to 6The heat dissipation assembly 4 comprises a heat sink 41, the heat sink 41 comprises a heat dissipation plate 411 and a plurality of heat dissipation ribs 412, the heat dissipation plate 411 has a first surface 4111 and a second surface 4112, the first surface 4111 faces the shunt 3, the second surface 4112 faces away from the shunt 3, the plurality of heat dissipation ribs 412 are fixed to the second surface 4112 of the heat dissipation plate 411, and an end of the heat dissipation rib 412 away from the second surface 4112 abuts against the second shell 12. Adjacent two heat dissipation ribs 412 are arranged at intervals, and a heat dissipation space 410 is formed between the adjacent two heat dissipation ribs 412. The heat dissipation plate 411 can quickly absorb the heat generated by the shunt 3, and the heat dissipation ribs 412 and the heat dissipation space 410 between the heat dissipation ribs 412 increase the heat dissipation area, promote the natural convection of air, so that the heat can be more quickly dissipated to the second shell 12 and the accommodation cavity 10 through the heat dissipation ribs 412 and the heat dissipation space 410, and the heat dissipation efficiency is improved.

[0035] In some embodiments, the plurality of heat dissipation ribs 412 are arranged in parallel along the length direction of the heat dissipation plate 411, the width direction of the heat dissipation rib 412 is parallel to the width direction of the heat dissipation plate 411, and the width of each heat dissipation rib 412 is equal to the width of the heat dissipation plate 411. The length direction of the heat dissipation plate 411 is parallel to the first direction x, the width direction of the heat dissipation plate 411 is parallel to the second direction y, and the first direction x is perpendicular to the second direction y.

[0036] In some embodiments, the heat sink 41 is made of high-thermal-conductivity materials such as aluminum or aluminum alloy.

[0037] In some embodiments, the heat dissipation plate 411 and the heat dissipation rib 412 are integrally formed.

[0038] In some embodiments, referring to Figure 4 and Figure 5 , the heat dissipation assembly 4 further comprises a heat conduction piece 42, the heat conduction piece 42 is arranged between the first surface 4111 of the heat dissipation plate 411 and the shunt 3, and the heat conduction piece 42 is used for transmitting the heat generated by the shunt 3 to the heat dissipation plate 411, thereby enhancing the heat dissipation efficiency. In addition, the heat conduction piece 42 plays a buffering role between the shunt 3 and the heat sink 41, effectively reducing the stress on the connection between the shunt 3 and the heat sink 41 caused by vibration and impact generated during the operation of the frequency converter 1000.

[0039] In some embodiments, along the thickness direction of the heat dissipation plate 411, the projection of at least one of the heat dissipation plate 411 and the heat conduction piece 42 completely covers the shunt 3 on the circuit board 2.

[0040] In some embodiments, referring to Figure 7In some embodiments, the shell 1 is provided with a limiting assembly 13, which is arranged on the side of the second shell 12 facing the accommodating cavity 10, is located in the accommodating cavity 10, is connected with the heat dissipation assembly 4, and fixes the heat dissipation assembly 4 to the second shell 12.

[0041] In some embodiments, referring to Figures 7 to 10 , the limiting assembly 13 comprises a first limiting plate 131 and a second limiting plate 132 arranged oppositely along the first direction x. Along the first direction x, the first limiting plate 131 is concavely provided with a first clamping groove 1310, and the second limiting plate 132 is concavely provided with a second clamping groove 1320.

[0042] In some embodiments, referring to Figure 5 and Figure 6 , along the arrangement direction of the plurality of heat dissipation ribs 412, the outermost heat dissipation rib 412 is provided with a first protrusion 4121, and the other outermost heat dissipation rib 412 is provided with a second protrusion 4122. The first protrusion 4121 is clamped in the first clamping groove 1310, and the second protrusion 4122 is clamped in the second clamping groove 1320, so as to clamp and fix the heat dissipation assembly 41 to the second shell 12, and improve the stability of the connection between the heat dissipation assembly 41 and the shell 1.

[0043] In some embodiments, the first protrusion 4121 is arranged on the side wall of the outermost heat dissipation rib 412 on the heat dissipation plate 411 away from the second surface 4112, and extends along the width direction of the heat dissipation rib 412. The second protrusion 4122 is arranged on the side wall of the other outermost heat dissipation rib 412 on the heat dissipation plate 411 away from the second surface 4112, and extends along the width direction of the heat dissipation rib 412.

[0044] In some embodiments, referring to Figure 8 , the first limiting plate 131 is provided with a first notch 1311 located on the side of the first limiting plate 131 along the second direction y, which is in communication with the first clamping groove 1310 and is used for the first protrusion 4121 to enter and exit the first clamping groove 1310.

[0045] In some embodiments, referring to Figure 9 and Figure 10 , the second limiting plate 132 is provided with a second notch 1321 located on the side of the second limiting plate 132 along the second direction y, which is in communication with the second clamping groove 1320 and is used for the second protrusion 4122 to enter and exit the second clamping groove 1320.

[0046] In some embodiments, the opening direction of the first notch 1311 and the opening direction of the second notch 1321 are the same.

[0047] The first gap 1311 and the second gap 1321 make the mounting and dismounting process of the heat sink 41 more convenient. During mounting, the first protrusion 4121 and the second protrusion 4122 of the heat sink 41 can be smoothly clamped into the first clamping groove 1310 and the second clamping groove 1320 through the first gap 1311 and the second gap 1321, without the need for precise alignment or the application of excessive force. Similarly, during dismounting, the first protrusion 4121 and the second protrusion 4122 can also be easily pulled out of the first clamping groove 1310 and the second clamping groove 1320 through the first gap 1311 and the second gap 1321, simplifying the dismounting process and facilitating operation.

[0048] In some embodiments, referring to FIG. 7 and Figure 8 , along the third direction z, the width of the first clamping groove 1310 is greater than the thickness of the first protrusion 4121, so that the first protrusion 4121 can move in the first clamping groove 1310 of the first limiting plate 131.

[0049] In some embodiments, referring to Figure 8 , the first limiting plate 131 is provided with a third protrusion 1312 at the first gap 1311, and the third protrusion 1312 extends along the third direction z. Among them, the third direction z, the second direction y and the first direction x are perpendicular to each other.

[0050] In some embodiments, referring to Figure 9 and Figure 10 , along the third direction z, the length of the second clamping groove 1320 is greater than the length of the second protrusion 4122, so that the second protrusion 4122 can move in the second clamping groove 1320 of the second limiting plate 132.

[0051] In some embodiments, referring to Figure 10 , the second limiting plate 132 is provided with a fourth protrusion 1322 at the second gap 1321, and the fourth protrusion 1322 extends along the third direction z.

[0052] During the assembly of the frequency converter 1000, after the circuit board 2 with the shunt 3 assembled is fixed to the first shell 11, the heat-conducting member 42 is placed or adhered to the surface of the shunt 3 away from the circuit board 2. Then, the first protrusion 4121 and the second protrusion 4122 of the heat sink 41 are respectively clamped into the first clamping groove 1310 and the second clamping groove 1320 from the first gap 1311 and the second gap 1321 along the second direction y. At this time, under the action of gravity of the heat sink 41, the first protrusion 4121 slides into the bottom of the first clamping groove 1310 away from the first gap 1311, the second protrusion 4122 slides into the bottom of the second clamping groove 1320 away from the second gap 1321, and the heat sink 41 is hung on the side of the second shell 12 facing the first shell 11 through the limiting assembly 13. While the second protrusion 1312 limits the first protrusion 4121 in the first clamping groove 1310, and the third protrusion 1322 limits the second protrusion 4122 in the second clamping groove 1320, so that when the relative position of the second shell 12 and the first shell 11 is adjusted, the heat sink 41 can be stably connected to the first limiting plate 131 and the second limiting plate 132, reducing the risk of falling off of the heat sink 41 during installation.

[0053] When the second shell 12 and the first shell 11 are positionally aligned, the heat sink 41 and the second shell 12 are covered from above the first shell 11, and under the abutting force of the shunt 3 on the heat sink 41 through the heat-conducting member 42, the first protrusion 4121 and the second protrusion 4122 of the heat sink 41 move along the first clamping groove 1310 and the second clamping groove 1320 along the third direction z respectively, until the heat radiating rib 412 away from the one end of the second surface 4112 abuts against the surface of the second shell 12 facing the accommodation cavity 10. At this time, the shunt 3, the heat-conducting member 42, the heat sink 41 and the second shell 12 are in close abutment in sequence, ensuring that the heat generated by the shunt 3 can be effectively transmitted to the heat sink 41 through the heat-conducting member 42, and dissipated to the external environment by the heat sink 41 and the shell 1. Then, the first shell 11 and the second shell 12 are fixedly connected through the buckle structure or screws, and the assembly of the frequency converter 1000 is completed.

[0054] It can be understood that the first clamping groove 1310 and the second clamping groove 1320 are both reserved with a certain length allowance, which not only provides a tolerance space for the installation of the heat sink 41, so that the heat sink 41 can be more easily aligned and clamped with the limiting assembly 13 during installation, but also allows the heat sink 41 to have a certain activity allowance when it is thermally expanded or contracted or subjected to slight vibration, reducing the risk of stress concentration or damage caused by rigid connection.

[0055] In some embodiments, the limiting assembly 13 is made of plastic material, and the limiting assembly 13 and the second shell 12 are integrally formed.

[0056] In some embodiments, the second shell 12 is provided with a plurality of heat dissipation through holes 120, which are located between the first limiting plate 131 and the second limiting plate 132, and communicate with the receiving cavity 10, further enhancing the heat dissipation performance of the shunt 3. The heat dissipation through holes 120 allow air to pass through and exchange with the heat dissipation ribs 412 and the hot air in the heat dissipation space 410, thereby accelerating the dissipation of heat.

[0057] In some embodiments, the plurality of heat dissipation through holes 120 are arranged in two rows, and each row of heat dissipation through holes 120 is arranged in sequence along the first direction x.

[0058] In some embodiments, the second shell 12 is further provided with a ventilation hole, and the heat dissipation through holes 120 communicate with the outside through the ventilation hole.

[0059] In the embodiments of the present application, the frequency converter 1000 includes a shell 1, a circuit board 2, a shunt 3 and a heat dissipation assembly 4. The shell 1 is provided with a receiving cavity 10, and the shell 1 is provided with a limiting assembly 13 located in the receiving cavity 10. The circuit board 2 and the shunt 3 are arranged in the receiving cavity 10, the shunt 3 is arranged on the circuit board 2, the heat dissipation assembly 4 is located in the receiving cavity 10, the heat dissipation assembly 4 is connected with the limiting assembly 13, the limiting assembly 13 connects the heat dissipation assembly 4 with the shell 1, the heat dissipation assembly 4 is connected with the shunt 3, and the heat dissipation assembly 4 is used for dissipating heat of the shunt 3. The heat dissipation assembly 4 for dissipating heat of the shunt 3 is installed on the shell 1 through the limiting assembly 13, which not only reduces the risk of interference between the heat dissipation assembly 4 and other electronic elements on the circuit board 2, but also effectively saves the area of the circuit board 2, which is conducive to reducing the overall size and manufacturing cost of the frequency converter 1000.

[0060] The present application provides an electric power device, which comprises the above-mentioned frequency converter 1000. The structure and functions of the frequency converter 1000 can be referred to the above-mentioned embodiments, which will not be described here.

[0061] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification. These embodiments are not additional limitations on the content of the present application, and the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Furthermore, each of the above technical features continues to be combined, forming various embodiments not listed above, which are considered to be within the scope of the present application. Furthermore, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes shall fall within the scope of protection of the appended claims of the present application.

Claims

1. A frequency converter, characterized in that The shell is provided with a receiving cavity, and the shell is provided with a limiting assembly in the receiving cavity; The circuit board is arranged in the receiving cavity; The shunt is arranged on the circuit board; The heat dissipation assembly is located in the receiving cavity, the heat dissipation assembly is connected with the limiting assembly, the heat dissipation assembly is in contact with the shunt, and the heat dissipation assembly is used for dissipating heat of the shunt.

2. The frequency converter of claim 1, wherein The heat dissipation assembly comprises a heat sink, the heat sink comprises a heat sink plate and a plurality of heat sink ribs, the heat sink plate has a first surface and a second surface, the first surface faces the shunt, the second surface faces away from the shunt, the plurality of heat sink ribs are arranged on the second surface of the heat sink plate, and two adjacent heat sink ribs are arranged at intervals. The limiting assembly comprises a first limiting plate and a second limiting plate arranged opposite in a first direction, and in the first direction, the first limiting plate is recessed with a first clamping groove, and the second limiting plate is recessed with a second clamping groove.

3. The frequency converter of claim 2, wherein , In the arrangement direction of the plurality of heat sink ribs, an outermost heat sink rib is provided with a first protrusion, and the first protrusion is located in the first clamping groove. In the arrangement direction of the plurality of heat sink ribs, another outermost heat sink rib is provided with a second protrusion, and the second protrusion is located in the second clamping groove. The first limiting plate is provided with a first notch, the first notch is located on one side of the first limiting plate in a second direction, the first notch is in communication with the first clamping groove, and the first notch is used for the first protrusion to enter and exit the first clamping groove.

4. The frequency converter of claim 3, wherein , The second limiting plate is provided with a second notch, the second notch is located on one side of the second limiting plate in the second direction, the second notch is in communication with the second clamping groove, and the second notch is used for the second protrusion to enter and exit the second clamping groove. The second direction is perpendicular to the first direction. In a third direction, the width of the first clamping groove is greater than the thickness of the first protrusion, so that the first protrusion can move in the first clamping groove; in the third direction, the width of the second clamping groove is greater than the thickness of the second protrusion, so that the second protrusion can move in the second clamping groove.

5. The frequency converter of claim 4, wherein , The first direction, the second direction and the third direction are perpendicular to each other. The first limiting plate is provided with a third protrusion at the first notch, and the third protrusion extends in the third direction; and / or 6. The frequency converter of claim 5, wherein , The second limiting plate is provided with a fourth protrusion at the second notch, and the fourth protrusion extends in the third direction. The shell is provided with a plurality of heat dissipation through holes, the plurality of heat dissipation through holes are located between the first limiting plate and the second limiting plate, and the plurality of heat dissipation through holes are in communication with the receiving cavity.

7. The frequency converter of claim 4, wherein , 8. The frequency converter of any one of claims 2-7, wherein The heat dissipation assembly further comprises a heat conduction member, and the heat conduction member is arranged between the first surface of the heat sink plate and the shunt.

9. The frequency converter of any one of claims 2-7, wherein ​ The shell comprises a first shell and a second shell, the first shell and the second shell are separably connected, the first shell and the second shell enclose the accommodation cavity, the circuit board is arranged in the first shell, one end of the heat dissipation assembly is arranged in the second shell, and the other end of the heat dissipation assembly abuts against the shunt.

10. An electrical power device, characterized by A frequency converter as claimed in any one of claims 1-9.

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