Frequency converter

Abstract

The utility model discloses a frequency converter, relates to the frequency converter technical field, the frequency converter comprises a box body, a reactance unit and a fastener, the box body forms a containing cavity, the reactance unit comprises a reactor and a mounting block wrapping the reactor, the mounting block can slide into the containing cavity along a first direction, and when the mounting block slides into the containing cavity, the fastening piece is fastened on the mounting block. And the fastener can penetrate through the box body and is connected with the mounting block. According to the technical scheme, the drawer type installation structure is adopted, the electric reactor can slide into the containing cavity along with the installation block, the position of the installation block is fixed through the fastener, then the position of the electric reactor is fixed, the installation difficulty of the electric reactor can be reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, and particularly relates to a frequency converter. Background Art

[0002] A variable-frequency drive (VFD for short) is a power control device that applies frequency conversion technology and microelectronics technology to control an electric current motor by changing the working power frequency of the motor. When assembling a frequency converter, it is usually necessary to install a reactor inside the box body of the frequency converter. However, the existing installation of the reactor has the problem of difficult installation.

[0003] Therefore, it is necessary to provide a new frequency converter to solve the above technical problems. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a frequency converter, aiming to solve the technical problem of difficult installation of the reactor of the frequency converter.

[0005] To achieve the above purpose, a frequency converter proposed by the utility model includes:

[0006] A box body, which forms a receiving cavity;

[0007] A reactance unit, which includes a reactor and an installation block that wraps the reactor, and the installation block can slide into the receiving cavity along a first direction;

[0008] A fastener, when the installation block slides into the receiving cavity, the fastener can pass through the box body and be connected to the installation block.

[0009] In an embodiment, the fastener includes a fastening screw; when the installation block slides into the receiving cavity, the fastening screw can pass through the box body and be connected to the installation block.

[0010] In an embodiment, the box body is provided with a connection hole, the installation block is provided with an installation hole corresponding to the connection hole, and the fastening screw can pass through the connection hole and the installation hole to connect the box body and the installation block.

[0011] In an embodiment, the installation block includes a first bending plate, a connecting plate and a second bending plate sequentially connected along the first direction. The first bending plate, the connecting plate and the second bending plate enclose a receiving space, and the connecting plate is provided with an installation plate, and the installation plate is provided with the installation hole.

[0012] In an embodiment, a limiting plate is arranged in the receiving cavity; the installation block can slide into the receiving cavity along the first direction and abut against the limiting plate.

[0013] In one embodiment, the frequency converter further includes a fixing member; when the mounting block abuts against the limiting plate, the fixing member can pass through the limiting plate and be connected to the mounting block.

[0014] In one embodiment, the number of the limiting plates is multiple, and the multiple limiting plates are arranged at intervals in the second direction.

[0015] In one embodiment, a wind guiding inclined surface is provided on one side of the mounting block close to the limiting plate.

[0016] In one embodiment, the length of the mounting block in the second direction is equal to the length of the accommodating cavity in the second direction.

[0017] In one embodiment, the reactance unit further includes a connecting member, and the connecting member passes through the mounting block and is connected to the reactor.

[0018] The technical solution of the present utility model adopts a drawer-type installation structure, so that the reactor can slide into the accommodating cavity along with the mounting block, and the position of the mounting block is fixed by a fastening member, thereby fixing the position of the reactor. This can reduce the installation difficulty of the reactor, improve production efficiency, and avoid damaging the structure of the box body to ensure the overall structural strength of the frequency converter and make the appearance of the frequency converter more beautiful. In this embodiment, the box body forms an accommodating cavity for accommodating the reactance unit and the components of the frequency converter. The reactance unit includes a reactor and a mounting block that wraps the reactor. Among them, the mounting block can slide into the accommodating cavity in the first direction, that is to say, the reactance unit slides into the accommodating cavity by pushing and pulling, which can reduce the installation difficulty of the reactance unit, that is, reduce the installation difficulty of the reactor; at the same time, using the mounting block to wrap the reactor can better protect the reactor to avoid damage to the reactor due to collision. The fastening member can pass through the box body and be connected to the mounting block when the mounting block slides into the accommodating cavity, which can fix the position of the mounting block, and thus fix the position of the reactor to ensure the position stability when the reactor is installed in the box body. Specifically, when assembling the frequency converter, first wrap the mounting block around the reactor to form a reactance unit, then push the mounting block in the first direction to make the mounting block slide into the accommodating cavity of the box body in the first direction, and finally make the fastening member pass through the box body and be connected to the mounting block. Thus, the reactor can be installed in the accommodating cavity of the box body. This frequency converter adopts a drawer-type installation structure, so that the reactor can slide into the accommodating cavity along with the mounting block, and the position of the mounting block is fixed by a fastening member, thereby fixing the position of the reactor. It can reduce the installation difficulty of the reactor and improve production efficiency; at the same time, it does not need to open holes at the top or bottom of the box body, which can ensure the overall structural strength of the box body, and thus ensure the overall structural strength of the frequency converter, and can also make the appearance of the frequency converter more beautiful. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic structural diagram of the frequency converter in the embodiments provided by the present invention;

[0021] Figure 2 It is a schematic structural diagram of the box body in the embodiments provided by the present invention;

[0022] Figure 3 It is a schematic structural diagram of the mounting block in the embodiments provided by the present invention;

[0023] Figure 4 For Figure 3 Another perspective schematic diagram.

[0024] Explanation of the reference numerals in the drawings:

[0025] 1. Box body; 11. Accommodating cavity; 12. Limiting plate; 13. Connecting hole; 2. Reactance unit; 21. Reactor; 22. Mounting block; 221. Air guide inclined surface; 222. Accommodating space; 223. First bending plate; 224. Connecting plate; 2241. Mounting plate; 225. Second bending plate; 226. Mounting hole; 23. Connecting piece; 3. Fastening piece; 31. Fastening screw; 4. Fixing piece.

[0026] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if the descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously.

[0030] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] The reactor in the frequency converter has functions such as suppressing harmonics, protecting the frequency converter and the motor, filtering, and limiting voltage fluctuations. However, in the actual production process, the researchers found that when assembling the frequency converter, it is usually necessary to open through holes at the top or bottom of the box body, and then install the reactor into the box body through the through holes from above or below the box body and fix it; when installing the reactor from above the box body, the worker needs to hold the reactor all the time and tighten the bolts for fixing the reactor; when installing the reactor from below the box body, the worker needs to hold up the reactor all the time and tighten the bolts for fixing the reactor. By installing the reactor in the above two ways, there is a technical problem of great installation difficulty.

[0032] The present utility model provides a frequency converter, aiming to solve the technical problem of great installation difficulty of the reactor in the frequency converter.

[0033] Please refer to Figure 1 and Figure 2 , in an embodiment of the present utility model, the frequency converter includes a box body 1, a reactor unit 2, and a fastener 3. The box body 1 forms a receiving cavity 11. The reactor unit 2 includes a reactor 21 and an installation block 22 that wraps the reactor 21. The installation block 22 can slide into the receiving cavity 11 along a first direction. When the installation block 22 slides into the receiving cavity 11, the fastener 3 can pass through the box body 1 and be connected to the installation block 22. Among them, the first direction is the direction indicated by X in Figure 1 , and in a specific embodiment, the first direction refers to the length direction of the box body 1.

[0034] The technical solution of the present utility model adopts a drawer-type installation structure, enabling the reactor 21 to slide into the accommodation cavity 11 along with the installation block 22, and fixing the position of the installation block 22 through the fastener 3, thereby fixing the position of the reactor 21. This can reduce the installation difficulty of the reactor 21, improve production efficiency, and avoid damaging the structure of the box body 1 to ensure the overall structural strength of the frequency converter and make the appearance of the frequency converter more beautiful. In this embodiment, the box body 1 forms an accommodation cavity 11 for accommodating the reactance unit 2 and other components of the frequency converter. The reactance unit 2 includes a reactor 21 and an installation block 22 that wraps the reactor 21. Among them, the installation block 22 can slide into the accommodation cavity 11 along the first direction, that is to say, the installation block 22 can slide into the accommodation cavity 11 by pushing or pulling, which can reduce the installation difficulty of the installation block 22 and thus reduce the installation difficulty of the reactor 21. At the same time, using the installation block 22 to wrap the reactor 21 can better protect the reactor 21 to avoid damage to the reactor 21 due to collision. The fastener 3 can pass through the box body 1 and connect with the installation block 22 when the installation block 22 slides into the accommodation cavity 11, which can fix the position of the installation block 22 and thus fix the position of the reactor 21 to ensure the position stability of the reactor 21 when it is installed in the box body 1. Specifically, when assembling the frequency converter, first wrap the installation block 22 around the reactor 21 to form the reactance unit 2, then push the installation block 22 along the first direction to make the installation block 22 slide into the accommodation cavity 11 of the box body 1 along the first direction, and finally make the fastener 3 pass through the box body 1 and connect with the installation block 22. Thus, the reactor 21 can be installed in the accommodation cavity 11 of the box body 1. By adopting the drawer-type installation structure, the frequency converter enables the reactor 21 to slide into the accommodation cavity 11 along with the installation block 22, and fixes the position of the installation block 22 through the fastener 3, thereby fixing the position of the reactor 21, which can reduce the installation difficulty of the reactor 21 and improve production efficiency. At the same time, it does not need to open holes at the top or bottom of the box body 1, which can ensure the overall structural strength of the box body 1, and thus ensure the overall structural strength of the frequency converter, and can also make the appearance of the frequency converter more beautiful.

[0035] It should be noted that in this embodiment, the box body 1 is formed by enclosing multiple plates. When assembling the frequency converter, first connect the plates at the top, bottom, and both sides of the box body 1. At this time, openings are formed on both sides of the box body 1. Then, wrap the mounting block 22 around the reactor 21 and make it pass through the opening along the first direction and slide into the accommodation cavity 11 of the box body 1. Then, make the fastener 3 pass through the box body 1 and connect with the mounting block 22 to fix the position of the reactor 21. Finally, install the plates at both ends of the box body 1. That is to say, when installing the reactor 21, there is no need to open holes in the plates at the top or bottom of the box body 1. By using only the openings formed during the assembly of the box body 1, the reactor 21 can be installed into the box body 1, which can reduce the installation difficulty of the reactor 21. At the same time, it can also ensure the structural strength of each plate of the box body 1, and further ensure the overall structural strength of the box body 1.

[0036] Please refer to Figure 1 , in an embodiment of the present invention, the fastener 3 includes a fastening screw 31; when the mounting block 22 slides into the accommodation cavity 11, the fastening screw 31 can pass through the box body 1 and connect with the mounting block 22. In the embodiment of the present invention, slide the mounting block 22 into the accommodation cavity 11 along the first direction, and then make the fastening screw 31 pass through the box body 1 and be threadedly connected with the mounting block 22, and the installation of the reactor 21 can be completed, which can reduce the installation difficulty of the reactor 21. Specifically, designing the fastener 3 as a fastening screw 31 can reduce the difficulty of fixing the reactor 21, and at the same time has the characteristics of simple structure, which can simplify the structure of the frequency converter and reduce the manufacturing difficulty of the frequency converter. It should be noted that in addition to being a fastening screw 31, the fastener 3 can also be other columnar parts, as long as it can ensure that the fastener 3 can pass through the box body 1 and connect with the mounting block 22 when the mounting block 22 slides into the accommodation cavity 11 to fix the position of the mounting block 22, and further fix the position of the reactor 21.

[0037] Please refer to Figure 1 , in an embodiment of the present invention, the box body 1 is provided with a connection hole 13, and the mounting block 22 is provided with a mounting hole 226 corresponding to the connection hole 13. The fastening screw 31 can pass through the connection hole 13 and the mounting hole 226 to connect the box body 1 and the mounting block 22. Specifically, the box body 1 is provided with a connection hole 13 for installing the fastening screw 31, and the mounting block 22 is provided with a mounting hole 226 corresponding to the connection hole 13. When fixing the mounting block 22, first align the connection hole 13 with the mounting hole 226, and then make the fastening screw 31 pass through the connection hole 13 and be threadedly connected into the mounting hole 226.

[0038] Please refer to Figure 3 and Figure 4, in an embodiment of the present utility model, the mounting block 22 includes a first bending plate 223, a connecting plate 224, and a second bending plate 225 that are sequentially connected in a first direction. The first bending plate 223, the connecting plate 224, and the second bending plate 225 enclose a receiving space 222. The connecting plate 224 is provided with a mounting plate 2241, and the mounting plate 2241 is provided with a mounting hole 226. In the embodiment of the present utility model, the mounting block 22 is formed by bending a plate, which has the characteristics of simple structure and convenient manufacturing. It can reduce the manufacturing difficulty of the mounting block 22, and thus reduce the manufacturing difficulty of the frequency converter. At the same time, it can also reduce the weight of the mounting block 22 to a certain extent, and then reduce the weight of the frequency converter. And the connecting plate 224 is provided with a mounting plate 2241, and the mounting plate 2241 is provided with a mounting hole 226. The fastening screw 31 can pass through the connecting hole 13 and be threadedly connected to the mounting hole 226 when the mounting block 22 slides into the receiving cavity 11 to fix the position of the mounting block 22. When installing the reactor 21, the reactor 21 is completely received in the receiving space 222 formed by the mounting block 22, which can better protect the reactor 21 to avoid damage to the reactor 21 due to collision.

[0039] Please refer to Figure 1 , in an embodiment of the present utility model, the number of the fastening screws 31 is multiple, and the multiple fastening screws 31 are arranged at intervals. In the embodiment of the present utility model, the position of the mounting block 22 is fixed by the multiple fastening screws 31, which can better fix the mounting block 22 in the receiving cavity 11 to ensure the stable position of the mounting block 22. In a specific embodiment, the number of the fastening screws 31 is three. The three fastening screws 31 are respectively denoted as the first screw, the second screw, and the third screw. Among them, the first screw and the second screw are arranged at intervals in the first direction, and the third screw is arranged obliquely below the side of the second screw away from the first screw. The position of the mounting block 22 can be fixed by the three fastening screws 31, thereby ensuring the stable position of the mounting block 22.

[0040] Please refer to Figure 1 and Figure 2, in an embodiment of the present utility model, a limiting plate 12 is provided in the accommodation cavity 11; the mounting block 22 can slide into the accommodation cavity 11 in the first direction and abut against the limiting plate 12. In the embodiment of the present utility model, after the mounting block 22 slides into the accommodation cavity 11 in the first direction, the mounting block 22 can abut against the limiting plate 12; wherein, the limiting plate 12 can limit the position of the mounting block 22 to ensure the accuracy of the mounting position of the mounting block 22. Moreover, when assembling the frequency converter, the limiting plate 12 can pre-position the mounting block 22 to reduce the difficulty of subsequently installing the fastening screw 31. Specifically, the limiting plate 12 can pre-position the mounting block 22; when installing the fastening screw 31, it only needs to make the mounting block 22 abut against the limiting plate 12, then the connection hole 13 and the mounting hole 226 can be aligned, without the need to manually adjust the position of the mounting block 22, which can simplify the installation process and improve work efficiency.

[0041] Please refer to Figure 1 , in an embodiment of the present utility model, the frequency converter further includes a fixing member 4; when the mounting block 22 abuts against the limiting plate 12, the fixing member 4 can pass through the limiting plate 12 and be connected to the mounting block 22. In the embodiment of the present utility model, when the mounting block 22 slides into the accommodation cavity 11 and abuts against the limiting plate 12, the fixing member 4 can pass through the limiting plate 12 and be connected to the mounting block 22, and the fixing member 4 can fix the mounting block 22 to ensure the stable position of the mounting block 22. In a specific embodiment, the fixing member 4 can be a screw, a stud, etc.

[0042] Please refer to Figure 2 , in an embodiment of the present utility model, the number of the limiting plates 12 is multiple, and the multiple limiting plates 12 are arranged at intervals in the second direction. Wherein, the second direction is Figure 1 the direction indicated by Y in

[0043] Please refer to Figure 3 and Figure 4, in an embodiment of the present utility model, a wind guiding inclined surface 221 is provided on one side of the mounting block 22 close to the limiting plate 12. In an embodiment of the present utility model, the frequency converter further includes a cooling fan and a radiator. The cooling fan is arranged on the side of the limiting plate 12 away from the mounting block 22 with its air outlet surface facing the mounting block 22, and the radiator is mounted on the top of the mounting block 22. Specifically, the cooling fan can blow air on the radiator to blow away the heat of the radiator, thereby dissipating the heat of the heating elements inside the frequency converter. When the cooling fan blows air on the radiator, the air blown out from the bottom of the cooling fan will be blocked by the mounting block 22. By providing the wind guiding inclined surface 221 on one side of the mounting block 22 close to the limiting plate 12, it can guide the air blown out from the bottom of the cooling fan to the radiator, thereby increasing the air volume blown out by the cooling fan to the radiator and improving the heat dissipation capacity. In this embodiment, the wind guiding inclined surface 221 is provided on the first bending plate 223.

[0044] In an embodiment of the present utility model, the length of the mounting block 22 in the second direction is equal to the length of the accommodating cavity 11 in the second direction. In an embodiment of the present utility model, when the mounting block 22 slides into the accommodating cavity 11 in the first direction, the two opposite sides of the mounting block 22 in the second direction are respectively in contact with the two opposite side walls of the accommodating cavity 11 in the second direction, which can limit the position of the mounting block 22 in the second direction to ensure the accurate mounting position of the mounting block 22.

[0045] Please refer to Figure 1 , Figure 3 and Figure 4 , in an embodiment of the present utility model, the reactance unit 2 further includes a connecting member 23, and the connecting member 23 passes through the mounting block 22 and is connected to the reactor 21. In an embodiment of the present utility model, the connecting member 23 passes through the mounting block 22 and is connected to the reactor 21, which can connect the mounting block 22 and the reactor 21 into a whole and reduce the assembly difficulty of the frequency converter. In a specific embodiment, the connecting member 23 can be a screw, a bolt, etc.

[0046] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A frequency converter, characterized in that, include: A box body, wherein the box body is formed with a receiving cavity; a reactance unit, the reactance unit comprising a reactor and a mounting block wrapping the reactor, the mounting block being capable of sliding into the accommodating cavity along a first direction; A fastener is capable of passing through the box body and being connected to the mounting block when the mounting block slides into the accommodating cavity.

2. The frequency converter according to claim 1, wherein: The fastener includes a fastening screw; when the mounting block slides into the accommodating cavity, the fastening screw can pass through the box body and be connected to the mounting block.

3. The frequency converter according to claim 2, wherein: The box body is provided with a connecting hole, the mounting block is provided with a mounting hole corresponding to the connecting hole, and the fastening screw can pass through the connecting hole and the mounting hole to connect the box body and the mounting block.

4. The frequency converter according to claim 3, characterized in that: The mounting block includes a first bent plate, a connecting plate, and a second bent plate connected in sequence along the first direction. The first bent plate, the connecting plate, and the second bent plate are arranged to form an accommodating space, and the connecting plate is provided with a mounting plate, and the mounting plate is provided with the mounting hole.

5. The frequency converter according to claim 1, characterized in that A limiting plate is provided in the accommodating cavity; the mounting block can slide into the accommodating cavity along a first direction and abut against the limiting plate.

6. The frequency converter according to claim 5, characterized in that, The frequency converter further includes a fixing member; when the mounting block abuts against the limiting plate, the fixing member can pass through the limiting plate and be connected to the mounting block.

7. The frequency converter according to claim 5, characterized in that: There are multiple limit plates, and the limit plates are spaced apart along the second direction.

8. The frequency converter according to claim 5, characterized in that: A wind guide slope is provided on one side of the mounting block close to the limiting plate.

9. The frequency converter according to claim 1, wherein: The length of the mounting block along the second direction is equal to the length of the accommodating cavity along the second direction.

10. The frequency converter according to any one of claims 1 to 9, characterized in that, The reactance unit further includes a connecting member passing through the mounting block and connected to the reactor.

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