Frequency converter system

Abstract

The utility model discloses a frequency converter system, which comprises a cabinet shell, a plurality of mounting subareas distributed along the horizontal direction are formed in the cabinet shell, the plurality of mounting subareas comprise at least one frequency conversion unit subarea, a frequency converter is arranged in the frequency conversion unit subarea, and an air guide cavity is defined. The air guide cavity is provided with a cavity air outlet and a cavity air inlet, the cavity air inlet is used for guiding airflow flowing out of the frequency converter, the cavity air outlet is used for guiding the airflow in the air guide cavity out of the cabinet shell, and hot airflow in the frequency converter is directly guided out of the cabinet shell through the air guide cavity. A fan does not need to be additionally arranged outside the cabinet shell, energy consumption is reduced, backflow of airflow in the cabinet is reduced, and the working environment of electrical elements in the cabinet is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter system technical field, especially a kind of frequency converter system. BACKGROUND

[0002] Frequency converter is often used to drive electrical load, such as motor, and the frequency converter adjusts motor speed by changing the frequency of power supply to motor. In actual application, the frequency converter is usually installed in a cabinet, and the output of the frequency converter in the cabinet is connected to the motor.

[0003] During the use of the frequency converter, heat is generated in the cabinet and forms hot air flow, which needs to be discharged. In some prior art, a separate fan is usually arranged on the top of the cabinet to form negative pressure at the air outlet of the cabinet and forcibly discharge air. This arrangement increases energy consumption and still causes part of the hot air flow to flow back, affecting the operation of electrical components in the cabinet. SUMMARY

[0004] The main purpose of the utility model is to provide a frequency converter system to reduce the backflow of air in the cabinet.

[0005] To achieve the above purpose, the utility model provides a frequency converter system, which comprises a cabinet shell. The cabinet shell has a plurality of installation partitions distributed in the horizontal direction. The plurality of installation partitions comprises at least one frequency conversion unit partition. A frequency converter is arranged in the frequency conversion unit partition, and an air guide cavity is defined.

[0006] The air guide cavity is provided with a cavity air outlet and a cavity air inlet. The cavity air inlet is used to guide the air flow out of the frequency converter, and the cavity air outlet is used to guide the air flow in the air guide cavity out of the cabinet shell.

[0007] In an embodiment, the top cavity wall of the air guide cavity comprises the top cabinet wall of the cabinet shell, and the cavity air outlet is arranged on the top cabinet wall of the cabinet shell.

[0008] In an embodiment, a first air outlet cover is arranged at the cavity air outlet. The first air outlet cover has a plurality of peripheral walls, and at least one of the peripheral walls is provided with a cover air outlet.

[0009] In an embodiment, a plurality of frequency conversion unit partitions are arranged, and corresponding to two adjacent frequency conversion unit partitions, two first air outlet covers have oppositely arranged cover side walls, and at least one of the two cover side walls is arranged in a closed manner.

[0010] In an embodiment, a partition is arranged between the top of the cabinet shell and two adjacent installation partitions, and the side cavity wall of the air guide cavity comprises the partition.

[0011] In an embodiment, a first flow guide plate is arranged horizontally in the cabinet housing corresponding to the variable frequency unit partition, the bottom cavity wall of the air guide cavity comprises the first flow guide plate, and the cavity air inlet is arranged on the first flow guide plate.

[0012] In an embodiment, a second flow guide plate is arranged vertically in the cabinet housing corresponding to the variable frequency unit partition, the back cavity wall of the air guide cavity comprises the second flow guide plate.

[0013] In an embodiment, a cabinet door is arranged on the front side of the cabinet housing, and the front cavity wall of the air guide cavity comprises the cabinet door.

[0014] In an embodiment, at least one of the variable frequency unit partitions comprises an end variable frequency unit partition at the end of the cabinet housing, and the side cavity wall of the air guide cavity in the end variable frequency unit partition comprises the side cabinet wall of the cabinet housing.

[0015] In an embodiment, the plurality of installation partitions further comprises a power distribution unit partition, and a first cabinet air outlet is arranged on the top of the cabinet housing corresponding to the power distribution unit partition, and a second air outlet cover is arranged on the first cabinet air outlet.

[0016] In an embodiment, the frequency converter comprises a device housing, an air duct is formed in the device housing, a device air outlet and a device air inlet are arranged on the air duct, the device air outlet is arranged corresponding to the cavity air inlet, so that the air flow in the device housing is guided into the air guide cavity from the cavity air inlet, discharged through the cavity air outlet, and can be guided out of the cabinet housing.

[0017] In an embodiment, a cabinet air inlet is arranged on the cabinet housing, and the cabinet air inlet is arranged on the front and / or back of the cabinet housing.

[0018] The air flow entering from the cabinet air inlet enters the frequency converter through the device air inlet.

[0019] In an embodiment, a heat sink and a fan are arranged in the air duct; and / or,

[0020] An output reactor is arranged in the air duct.

[0021] In the technical solution of this utility model, an air guide cavity is defined within the frequency converter unit partition. The air guide cavity is provided with an air outlet and an air inlet. The air inlet is used to introduce the airflow flowing out of the frequency converter, and the air outlet is used to export the airflow in the air guide cavity to the outside of the cabinet. The hot airflow in the frequency converter is directly introduced to the outside of the cabinet through the air guide cavity, eliminating the need to add an additional fan outside the cabinet, reducing energy consumption, reducing the backflow of airflow inside the cabinet, and improving the working environment of the electrical components inside the cabinet. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the frequency converter system (including a mounting housing) provided by this utility model;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle section;

[0025] Figure 3 for Figure 1 Rear view schematic diagram of the intermediate frequency converter system;

[0026] Figure 4 for Figure 1 A three-dimensional structural diagram of the medium frequency converter system (hidden cabinet door) from the first angle;

[0027] Figure 5 for Figure 4 Main view of the intermediate frequency converter system;

[0028] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the middle BB;

[0029] Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure along the CC axis;

[0030] Figure 8 for Figure 1 A two-dimensional structural diagram of the medium frequency converter system (hidden cabinet door) from a second angle.

[0031] Explanation of icon numbers:

[0032] 100, mounting housing; 1, cabinet housing; 11, side cabinet body wall; 12, first cabinet air outlet; 13, cabinet air inlet; 2, installation partition; 21, frequency conversion unit partition; 22, power distribution unit partition; 23, air guide cavity; 231, cavity air outlet; 232, cavity air inlet; 3, first air outlet cover; 31, circumferential side wall; 311, cover air outlet; 31a, cover side wall; 4, partition plate; 5, first flow guide plate; 6, second flow guide plate; 7, cabinet door; 8, second air outlet cover;

[0033] 1000, frequency converter system; 200, frequency converter; 201, device housing; 202, device air duct; 2021, device air outlet; 300, heat sink; 400, fan; 500, output reactor; 600, control unit.

[0034] The implementation function, characteristics and advantages of the utility model will be further described with reference to the drawings in combination with the embodiments. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0036] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0038] Variable frequency drives are often used to drive electrical loads such as motors, and the variable frequency drives adjust the speed of the motors by changing the frequency of the power supplied to the motors. In practical applications, the variable frequency drives are often installed in a cabinet, and then the output terminals of the variable frequency drives in the cabinet are connected to the motors.

[0039] During the use of the variable frequency drives, heat is generated in the cabinet and hot air flows are formed, and the hot air flows need to be discharged outward. In some prior art, a separate fan is often arranged on the top of the cabinet to form a negative pressure at the air outlet of the cabinet to forcibly discharge the air. Such arrangement increases energy consumption, and part of the hot air flows still flow back, affecting the working environment of the electrical elements in the cabinet.

[0040] Therefore, the utility model provides a variable frequency drive system, which aims to reduce the backflow of air in the cabinet and improve the working environment of the electrical elements in the cabinet. Figures 1 to 8 The utility model provides a structure schematic view of a household appliance.

[0041] Please refer to Figures 1 to 2 The utility model provides a mounting shell 100 of a variable frequency drive system, which comprises a cabinet shell 1, a plurality of mounting partitions 2 distributed along the horizontal direction are formed in the cabinet shell 1, the plurality of mounting partitions 2 comprise at least one variable frequency unit partition 21, and a wind guide cavity 23 is defined in the variable frequency unit partition 21.

[0042] The wind guide cavity 23 is provided with a cavity air outlet 231 and a cavity air inlet 232, the cavity air inlet 232 is used to guide the air flow out of the variable frequency drive 200 arranged in the variable frequency unit partition 21 into the wind guide cavity 23, and the cavity air outlet 231 is used to guide the air flow in the wind guide cavity 23 out of the cabinet shell 1.

[0043] In the technical scheme of the utility model, the wind guide cavity 23 is defined in the variable frequency unit partition 21, the wind guide cavity 23 is provided with the cavity air outlet 231 and the cavity air inlet 232, the cavity air inlet 232 is used to guide the air flow out of the variable frequency drive 200 arranged in the variable frequency unit partition 21 into the wind guide cavity 23, and the cavity air outlet 231 is used to guide the air flow in the wind guide cavity 23 out of the cabinet shell 1. The hot air flow in the variable frequency drive 200 is directly guided into the cabinet shell 1 by the wind guide cavity 23, without the need to additionally increase a fan outside the cabinet shell 1, thereby reducing energy consumption, reducing the backflow of air in the cabinet and improving the working environment of the electrical elements in the cabinet.

[0044] In the utility model, the user is used as the reference direction, the forward direction is the direction towards the user or the side of the mounting shell 100 provided with the cabinet door 7, and the backward direction is the direction opposite to the forward direction, specifically the direction away from the user, and the up-down direction is the direction with gravity as the reference.

[0045] It needs to be explained that a plurality of installation partitions 2 distributed in the horizontal direction (which can be considered as the left-right direction with the user as the reference) are formed in the cabinet shell 1, that is, in an overall cabinet shell 1 frame, a plurality of partitions are orderly arranged in the frame, so that different components can be arranged on each partition, for example, the plurality of installation partitions 2 include a variable frequency unit partition 21, a frequency converter 200 is arranged in the variable frequency unit partition 21, and the frequency converter 200 is connected to an external power load, so that the power load can be well controlled. Common power loads include motors and the like.

[0046] The variable frequency unit partition 21 can be provided with more, such as 2, 3 or more, when the number of the variable frequency unit partition 21 is at least 2 or more, the frequency converter 200 is also provided with at least 2 or more, so that more power loads can be controlled. Of course, in some embodiments, a plurality of frequency converters 200 can also control one power load, for example, two frequency converters 200 control one motor, or three frequency converters 200 control one motor, and the like, and the above frequency converters 200 are connected in parallel to control one power load.

[0047] There are high-power elements in the frequency converter 200, which can generate a large amount of heat. The frequency converter 200 is installed in the variable frequency unit partition 21, and hot air flow also flows into the variable frequency unit partition 21. In the technical scheme of the utility model, the air guide cavity 23 is defined in the variable frequency unit partition 21, and the hot air flow is directly discharged outward through the air guide cavity 23, reducing the air flow in the variable frequency unit partition 21 and reducing the influence of hot air flow on other electrical elements.

[0048] The air guide cavity 23 is provided with a cavity air outlet 231 and a cavity air inlet 232, which can be understood as a closed cavity (of course, some local gaps are ignored), that is, the hot air flow enters from the cavity air inlet 232 and is discharged from the cavity air outlet 231. Through the flow guiding effect of the air guide cavity 23, the hot air flow can be well guided.

[0049] The air guide cavity 23 can be a wind guide shell directly arranged in the variable frequency unit partition 21, and the air guide cavity 23 is formed in the wind guide shell, or some enclosing structures are arranged in the variable frequency unit partition 21 to jointly enclose and define the air guide cavity 23 in the variable frequency unit partition 21.

[0050] The cavity air outlet 231 can be formed on the cabinet shell 1, that is, the cavity air outlet 231 and the cabinet air outlet are one air outlet; or the cavity air outlet 231 and the cabinet air outlet are two air outlets, and some independent communication pipelines are arranged between the two air outlets, and the like.

[0051] For the top cavity wall of the air guide cavity 23, in some embodiments, the top cavity wall of the air guide cavity 23 includes the top cabinet wall of the cabinet shell 1, and the cavity air outlet 231 is arranged on the top cabinet wall of the cabinet shell 1, that is, the top cabinet wall of the cabinet shell 1 constitutes the top cavity wall of the air guide cavity 23, which simplifies the structure and shortens the airflow channel.

[0052] The cavity air outlet 231 is arranged upward, and in use, there is a risk that rainwater, dust and the like directly enter the variable frequency unit partition 21. The upward air outlet can be improved to a lateral air outlet to avoid the above risk.

[0053] In some embodiments, a first air outlet cover 3 is arranged at the cavity air outlet 231, the first air outlet cover 3 has a plurality of circumferential side walls 31, at least one of the circumferential side walls 31 is provided with a cover air outlet 311, and the upward top air outlet is changed to a horizontal top air outlet through the cover air outlet 311, thereby reducing the risk of rainwater, dust and the like directly entering the variable frequency unit partition 21.

[0054] In embodiments in which the first air outlet cover 3 is rectangular or square in cross section, the first air outlet cover 3 has a plurality of circumferential side walls 31, such as a front cover side wall 31a, a rear cover side wall 31a, a left cover side wall 31a, a right cover side wall 31a and the like. All of the above side walls can be provided with the cover air outlet 311, or some of the side walls can be provided with the cover air outlet 311, such as only the front cover side wall 31a and the rear cover side wall 31a being provided with the cover air outlet 311, and the left cover side wall 31a and the right cover side wall 31a not being provided with the cover air outlet 311. Of course, the arrangement of each first air outlet cover 3 can be the same or different for different first air outlet covers 3.

[0055] In embodiments in which a plurality of variable frequency unit partitions 21 are arranged, the air outlets of adjacent two first air outlet covers 3 will affect each other, and in some embodiments, corresponding to adjacent two variable frequency unit partitions 21, two first air outlet covers 3 have oppositely arranged cover side walls 31a, at least one of the two cover side walls 31a is arranged in a closed manner, that is, the two first air outlet covers 3 are separated in the left-right direction, and the degree of air outlet interference is reduced.

[0056] It should be noted that one of the cover sidewalls 31a may be closed, while the other cover sidewall 31a may be provided with the cover air outlet 311, or both cover sidewalls 31a may be closed.

[0057] In some embodiments, the top of the cabinet housing 1 is provided with a partition 4 between two adjacent installation partitions 2, and the side cavity wall of the air guide cavity 23 includes the partition 4. That is, the side cavity wall of the air guide cavity 23 can be formed by the partition 4 between the two frequency converter unit partitions 21, which utilizes the structure within the frequency converter unit partition 21 and simplifies the structural setup.

[0058] It should be noted that the material of the partition 4 needs to be set as heat-insulating material, which not only serves as physical isolation and current limiting, but also as heat isolation, reducing the heat flow between the two adjacent frequency converter unit partitions 21.

[0059] Regarding the installation method of the partition 4, it can be installed in the frequency converter unit partition 21 by means of a threaded installation structure, such as by using screws or bolts to be threadedly fastened to the mounting frame in the frequency converter unit partition 21. Alternatively, it can be installed by means of a snap-fit ​​connection structure or by means of structural adhesive, etc.

[0060] In some embodiments, at least one of the frequency converter unit partitions 21 includes an end frequency converter unit partition 21 located at the end of the cabinet housing 1, and the side cavity wall of the air guide cavity 23 located in the end frequency converter unit partition 21 includes the side cabinet wall 11 of the cabinet housing 1, that is, the side cabinet wall 11 of the cabinet housing 1 constitutes the side cavity wall of the air guide cavity 23, which simplifies the structural setup.

[0061] Regarding the bottom cavity wall of the air guide cavity 23, in some embodiments, please refer to... Figures 4 to 7 The cabinet housing 1 is provided with a horizontally placed first guide plate 5 corresponding to the frequency converter unit partition 21. The bottom cavity wall of the air guide cavity 23 includes the first guide plate 5. The cavity air inlet 232 is located on the first guide plate 5. By setting the first guide plate 5, the gap between the frequency converter 200 and the frequency converter unit partition 21 is blocked, reducing the downward backflow and diffusion of hot air and thus affecting the working environment of the electrical components in the cabinet housing 1.

[0062] It is understood that the first guide plate 5 can be a single plate or a combination of multiple individual plates, such as multiple plates connected end to end to form a U-shaped structure, within which the cavity air inlet 232 is defined.

[0063] For the mounting mode of the first flow guide plate 5, it can be mounted in the variable frequency unit partition 21 through a threaded mounting structure, such as being threadedly fastened on a mounting framework in the variable frequency unit partition 21 by screws or bolts, or being mounted by a buckle connection structure or structural adhesive.

[0064] For the back cavity wall of the air guiding cavity 23, it can be constituted by the back cabinet wall of the cabinet shell 1, or a separate flow guide plate can be provided. Considering that some wiring structures, such as high-voltage input structures of the frequency converter 200, are arranged between the frequency converter 200 and the back cabinet wall of the cabinet shell 1, there is a mounting gap between the frequency converter 200 and the back cabinet wall of the cabinet shell 1.

[0065] In some embodiments, referring to Figures 4 to 7 , a second flow guide plate 6 is arranged in the cabinet shell 1 corresponding to the variable frequency unit partition 21. The back cavity wall of the air guiding cavity 23 includes the second flow guide plate 6. The gap between the frequency converter 200 and the variable frequency unit partition 21 is shielded by the second flow guide plate 6, reducing the downward backflow and diffusion of hot air and affecting the working environment of electrical elements in the cabinet shell 1.

[0066] It can be understood that the second flow guide plate 6 is a single sealing plate, which can be made of a metal plate or a high-molecular material plate resistant to high temperature.

[0067] For the mounting mode of the second flow guide plate 6, it can be mounted in the variable frequency unit partition 21 through a threaded mounting structure, such as being threadedly fastened on a mounting framework in the variable frequency unit partition 21 by screws or bolts, or being mounted by a buckle connection structure or structural adhesive.

[0068] For the front cavity wall of the air guiding cavity 23, it can be constituted by the front cabinet wall of the cabinet shell 1, or a separate flow guide plate can be provided. In some embodiments, a cabinet door 7 is arranged on the front side of the cabinet shell 1. The front cavity wall of the air guiding cavity 23 includes the cabinet door 7, which constitutes the front cavity wall of the air guiding cavity 23, simplifying the structure.

[0069] It can be understood that the side of the cabinet door 7 is rotatably mounted on the mounting cabinet. For the cabinet door 7, it is usually in a closed state. In the closed state, the cabinet door 7 closes the front opening of the cabinet shell 1 and constitutes the front cavity wall of the air guiding cavity 23.

[0070] The plurality of installation partitions 2 further comprise a power distribution unit partition 22, and a control unit 600 is further arranged in the power distribution unit partition 22, which is electrically connected to an external control line and the frequency converter 200 to control the frequency converter 200.

[0071] For the power distribution unit partition 22, a cabinet air outlet is also arranged on the top cabinet wall of the power distribution unit partition 22, and in use, there is a risk that rain, dust and the like directly enter the frequency conversion unit partition 21. The upwardly arranged air outlet can be improved to a lateral air outlet to avoid the above-mentioned risk.

[0072] In some embodiments, a first cabinet air outlet 12 is arranged on the top of the cabinet shell 1 corresponding to the power distribution unit partition 22, and a second air outlet cover 8 is arranged at the first cabinet air outlet 12. The upward air outlet on the top is changed to a horizontal air outlet on the top through the second air outlet cover 8, which reduces the risk of rain, dust and the like directly entering the frequency conversion unit partition 21.

[0073] It should be noted that the second air outlet cover 8 can be arranged in the same manner as the first air outlet cover 3, which will not be described in detail below.

[0074] For the air inlet mode of the cabinet shell 1, in some embodiments, a cabinet air inlet 13 is arranged on the cabinet shell 1, and the airflow entering from the cabinet air inlet 13 enters the frequency converter 200 through the air inlet of the frequency converter 200, that is, the airflow first enters the frequency conversion unit partition 21 through the cabinet air inlet 13, and then enters the frequency converter 200.

[0075] In some embodiments, the cabinet air inlet 13 can be arranged on the front cabinet wall, the rear cabinet wall, the left cabinet wall, the right cabinet wall, etc. of the cabinet shell 1, or on at least one of the above.

[0076] In combination with the installation mode of the cabinet shell 1 itself, in some embodiments, please refer to Figure 1 and Figure 3 The cabinet air inlet 13 is arranged on the front and / or back of the cabinet shell 1, that is, air is introduced through the front of the cabinet shell 1, or the front, or the front and the back at the same time, etc.

[0077] It can be understood that no matter how the above-mentioned structure is arranged, the cabinet air inlet 13 on the cabinet shell 1 needs to be directly arranged corresponding to the air inlet of the frequency converter 200, so that the flow channel can be shortened and the air flow entering the frequency converter 200 can be increased.

[0078] Specifically, the cabinet air inlet 13 is also arranged at the lower part of the cabinet shell 1.

[0079] Please refer to Figure 8 The utility model also proposes a frequency converter system 1000, the frequency converter system 1000 includes the installation shell 100 of frequency converter system 1000, the installation shell 100 of frequency converter system 1000 includes all technical features in above-mentioned technical solutions, also has the technical effect brought by all above-mentioned technical features, here will not repeat.

[0080] In the frequency converter system 1000, the frequency converter 200 can be arranged in the frequency conversion unit partition 21, the frequency converter 200 includes a device shell 201, a device air duct 202 is formed in the device shell 201, a device air outlet 2021 is arranged on the device air duct 202, the device air outlet 2021 is arranged corresponding to the cavity air inlet 232, so that the airflow from the device shell 201 is guided into the air guide cavity 23 from the cavity air inlet 232, is blown out through the cavity air outlet 231 and can be guided out of the cabinet shell 1, in this way, the hot airflow in the frequency converter 200 is discharged, the reflux of the airflow in the cabinet is reduced, and the working environment of the electrical elements in the cabinet is improved.

[0081] It can be understood that the frequency converter 200 is an independent unit, which is assembled outside the cabinet shell 1, and only some external units are left outside the frequency converter 200, such as a control line interface, a strong current interface, an output interface and the like, after the frequency converter 200 is installed in the frequency conversion unit partition 21, the above structures are directly connected to the docking interface position reserved in the cabinet shell 1, and the electrical connection of the frequency converter 200 is realized.

[0082] In addition, in the scheme that a plurality of frequency converters 200 are arranged in the cabinet shell 1 to form parallel output, the frequency conversion unit partition 21 is provided with a plurality of frequency converters 200, and the frequency conversion unit partition 21 is provided with a plurality of frequency converters 200, and the above frequency converter 200 is used as a parallel unit to realize common control of one electrical load, on the one hand, the plurality of frequency converters 200 are used as standby, if one frequency converter 200 fails, the remaining frequency converters 200 can take over the control of the motor, reduce the downtime and ensure the continuity of control, on the other hand, the plurality of frequency converters 200 can be provided with different control parameter combinations to finely control the motor under different working conditions, so as to improve the operation performance of the motor under complex working conditions.

[0083] For the frequency converter 200, in some embodiments, the radiator 300 and the fan 400 are arranged in the device air duct 202, the radiator 300 can be used to realize the heat concentrated discharge of the main heat generating elements into the device air duct 202, and the fan 400 is used to form an air flow in the device air duct 202, thereby quickly taking away the heat of the main heat generating elements.

[0084] In the device air duct 202, the fan 400 can be arranged above the radiator 300, or the fan 400 can be arranged below the radiator 300.

[0085] In some embodiments, the output reactor 500 is further arranged in the device air duct 202, and the external electrical equipment is connected to the output reactor 500, thereby further optimizing the control performance of the electrical equipment.

[0086] The following describes the heat flow guiding process in the frequency converter system 1000 by the related structure of the frequency converter system 1000:

[0087] The external air enters the cabinet shell 1 from the cabinet air inlet 13, then enters the frequency converter 200 from the device air inlet of the frequency converter 200, passes through the output reactor 500, the fan 400 and the radiator 300 in sequence, is blown out from the device air outlet 2021, enters the guide cavity 23 from the cavity air inlet 232, is blown out from the cavity air outlet 231 under the guiding effect of the guide cavity 23, passes through the first air outlet cover 3, and is blown out from the cover air outlet 311 of the first air outlet cover 3 to the outside.

[0088] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the concept of the utility model, and the contents of the utility model specification and drawings are included in the patent protection range of the utility model.

Claims

1. A frequency converter system, characterized by The cabinet shell is internally formed with multiple installation sub-zones distributed in horizontal direction, and the multiple installation sub-zones include at least one frequency conversion unit sub-zone, a frequency converter is arranged in the frequency conversion unit sub-zone, and an air guiding cavity is defined. The air guiding cavity is provided with a cavity air outlet and a cavity air inlet, the cavity air inlet is used to guide the air flow out of the frequency converter, and the cavity air outlet is used to guide the air flow in the air guiding cavity out of the cabinet shell.

2. The frequency converter system of claim 1, wherein, The top cavity wall of the air guiding cavity includes the top cabinet wall of the cabinet shell, and the cavity air outlet is arranged on the top cabinet wall of the cabinet shell.

3. The frequency converter system of claim 2, wherein, A first air outlet cover is arranged at the cavity air outlet, and the first air outlet cover has multiple peripheral side walls, at least one of the peripheral side walls is provided with a cover air outlet.

4. The frequency converter system of claim 3, wherein, Corresponding to two adjacent frequency conversion unit sub-zones, two first air outlet covers have oppositely arranged cover side walls, and at least one of the two cover side walls is arranged in a closed manner.

5. The frequency converter system of claim 1, wherein, The cabinet shell is provided with a partition plate corresponding to two adjacent installation sub-zones, and the side cavity wall of the air guiding cavity includes the partition plate.

6. The frequency converter system of claim 1, wherein, The cabinet shell is internally provided with a horizontally arranged first flow guide plate corresponding to the frequency conversion unit sub-zone, the bottom cavity wall of the air guiding cavity includes the first flow guide plate, and the cavity air inlet is arranged on the first flow guide plate.

7. The frequency converter system of claim 1, wherein, The cabinet shell is internally provided with a vertically arranged second flow guide plate corresponding to the frequency conversion unit sub-zone, and the back cavity wall of the air guiding cavity includes the second flow guide plate.

8. The frequency converter system of claim 1, wherein, The front side of the cabinet shell is provided with a cabinet door, and the front cavity wall of the air guiding cavity includes the cabinet door.

9. The frequency converter system of claim 1, wherein, At least one of the frequency conversion unit sub-zones includes an end frequency conversion unit sub-zone at the end of the cabinet shell, and the side cavity wall of the air guiding cavity in the end frequency conversion unit sub-zone includes the side cabinet wall of the cabinet shell.

10. The frequency converter system of claim 1, wherein, The multiple installation sub-zones further include a power distribution unit sub-zone, the top of the cabinet shell is provided with a first cabinet air outlet corresponding to the power distribution unit sub-zone, and a second air outlet cover is arranged at the first cabinet air outlet.

11. The frequency converter system of claim 1, wherein, The frequency converter includes a device shell, an air duct is formed in the device shell, a device air outlet and a device air inlet are arranged on the air duct, the device air outlet is arranged corresponding to the cavity air inlet, so that the air flow in the device shell is guided into the air guiding cavity from the cavity air inlet, is blown out through the cavity air outlet, and can be guided out of the cabinet shell.

12. The frequency converter system of claim 11, wherein, A cabinet air inlet is arranged on the cabinet shell, and the cabinet air inlet is arranged on the front and / or back of the cabinet shell. The air flow entering from the cabinet air inlet enters the frequency converter through the device air inlet.

13. The frequency converter system of claim 11, wherein, A heat sink and a fan are arranged in the air duct; and / or An output reactor is arranged in the air duct.

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