Variable frequency control cabinet and variable frequency system

Abstract

The present disclosure relates to a variable frequency control cabinet and a variable frequency system, wherein the variable frequency control cabinet comprises: a cabinet (1), a space in the cabinet (1) is divided into four containing areas (S), the four containing areas (S) are distributed according to quadrants; a safety protection module (3) is arranged in the cabinet (1) and is configured to provide overload protection; a reactor module (4) is arranged in the cabinet (1) and is configured to reduce power frequency transient overvoltage and balance reactive power; a rectification filtering module (5) is arranged in the cabinet (1) and is configured to convert alternating current into direct current and filter out signals at specific frequency points; and a power supply driving module (6) is arranged in the cabinet (1) and is configured to output a power supply; wherein the safety protection module (3), the reactor module (4), the rectification filtering module (5) and the power supply driving module (6) are arranged in the four containing areas (S) respectively.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of variable frequency control devices, and particularly relates to a variable frequency control cabinet and a variable frequency system. BACKGROUND

[0002] A variable frequency device is a device whose working speed can be adjusted within a certain range, such as a compressor, a fan, etc. In order to realize the control function of the variable frequency device, a variable frequency control cabinet is generally independently arranged outside the variable frequency device. Since the control cabinet needs to realize multiple functions, the control cabinet of the current large variable frequency device has the following problems: multiple control cabinets are arranged in a scattered manner, the integration degree is not high, the structure is not compact, the wiring distance is long, and the cost is high. SUMMARY

[0003] Embodiments of the present disclosure provide a variable frequency control cabinet and a variable frequency system, which can improve the integration degree of the variable frequency control cabinet.

[0004] According to a first aspect of the present disclosure, a variable frequency control cabinet is provided, comprising:

[0005] a cabinet, a space in the cabinet is divided into four accommodation areas, and the four accommodation areas are distributed according to quadrants;

[0006] a safety protection module arranged in the cabinet and configured to provide overload protection;

[0007] a reactor module arranged in the cabinet and configured to reduce power frequency transient overvoltage and balance reactive power;

[0008] a rectification and filtering module arranged in the cabinet and configured to convert alternating current into direct current and filter out signals at specific frequency points; and

[0009] a power supply driving module arranged in the cabinet and configured to output a power supply;

[0010] The safety protection module, the reactor module, the rectification and filtering module, and the power supply driving module are arranged in the four accommodation areas, respectively.

[0011] In some embodiments, the safety protection module and the rectification and filtering module are arranged in the two upper accommodation areas, respectively, and the reactor module and the power supply driving module are arranged in the two lower accommodation areas, respectively.

[0012] In some embodiments, multiple devices in the safety protection module, the reactor module, the rectification and filtering module, and / or the power supply driving module are arranged in a stacked manner along the depth direction of the cabinet.

[0013] In some embodiments, the reactor module comprises multiple coils, and the multiple coils are arranged in a stacked manner along the depth direction.

[0014] In some embodiments, the power supply driving module comprises:

[0015] a first mounting rack, which is internally spaced to fix the first mounting plate and the second mounting plate in the depth direction from inside to outside;

[0016] a heat dissipation plate, which is fixed to the inner side of the first mounting plate;

[0017] a drive plate, which is fixed to one side of the heat dissipation plate and penetrates the first mounting plate; and

[0018] a main plate, which is fixed to the side of the second mounting plate away from the drive plate.

[0019] In some embodiments, the heat dissipation plate is internally provided with a first heat exchange pipe, the first heat exchange pipe is used to circulate refrigerant, and a first refrigerant inlet and a first refrigerant outlet of the first heat exchange pipe are led out of the cabinet.

[0020] In some embodiments, the rectification and filtering module comprises:

[0021] a first device layer, which is mounted on the rear wall of the cabinet;

[0022] a third mounting plate, a first end of the third mounting plate is connected to the side wall of the cabinet, and the third mounting plate is rotatably arranged in a plane perpendicular to the height direction; and

[0023] a second device layer, which is mounted on the third mounting plate and located on the side away from the first device layer.

[0024] In some embodiments, the first device layer comprises a relay, a filter, a switched capacitor, a temperature controller and a resistor; and / or the second device layer comprises a strong current sampling plate, a first overcurrent breaker and an electrical connection terminal.

[0025] In some embodiments, the frequency conversion control cabinet further comprises:

[0026] a second mounting rack, which is connected to the cabinet and used to separate the accommodation area where the rectification and filtering module is located from the accommodation area adjacent in the width direction of the cabinet;

[0027] wherein the second end of the third mounting plate is selectively fixed to or detached from the second mounting rack, and the second mounting rack is allowed to rotate in the state of being detached from the second mounting rack.

[0028] In some embodiments, the frequency conversion control cabinet further comprises:

[0029] a second mounting rack, which is connected to the cabinet and used to separate the accommodation area where the rectification and filtering module is located from the accommodation area adjacent in the width direction of the cabinet; and

[0030] a first fan, which is arranged on the second mounting rack, and the axis of the first fan is arranged in the width direction, and the first fan is used to form a circulating air flow in a plane perpendicular to the depth direction of the cabinet.

[0031] In some embodiments, the variable frequency control cabinet further comprises a heat dissipation assembly, the heat dissipation assembly comprising:

[0032] a housing assembly installed outside the cabinet; and

[0033] a second fan arranged in the housing assembly, and an axis of the second fan is arranged along a depth direction of the cabinet;

[0034] wherein the housing assembly is in communication with the cabinet at least at a position where the second fan is arranged, and the second fan is configured to form a circulating air flow in a plane perpendicular to a height direction of the variable frequency control cabinet within the cabinet.

[0035] In some embodiments, the variable frequency control cabinet further comprises a heat dissipation assembly, the heat dissipation assembly comprising:

[0036] a housing assembly installed outside the cabinet; and

[0037] an evaporator arranged in the housing assembly, and a second heat exchange tube of the evaporator is configured to circulate refrigerant, and a second refrigerant inlet and a second refrigerant outlet of the second heat exchange tube are led out of the housing assembly.

[0038] In some embodiments, the heat dissipation assembly further comprises:

[0039] a water pan arranged in the housing assembly and located at a bottom of the evaporator, and configured to collect water generated by operation of the evaporator.

[0040] In some embodiments, the variable frequency control cabinet further comprises:

[0041] a heat dissipation assembly installed outside the cabinet, and an installation area of the heat dissipation assembly corresponds to a containing area where the reactor module is arranged;

[0042] a line-in assembly installed outside the cabinet, and an installation area of the line-in assembly corresponds to a containing area where the safety protection module is arranged; and / or

[0043] a line-out assembly installed outside the cabinet, and an installation area of the line-out assembly corresponds to a containing area where the power supply driving module is arranged.

[0044] In some embodiments, at least one of the heat dissipation assembly, the line-in assembly and the line-out assembly comprises a housing assembly, the housing assembly comprising a housing and a cover, the cover is configured to cover an opening of the housing, and a first connecting edge of the housing and a second connecting edge of the cover form a planar fit or a stepped fit.

[0045] In some embodiments, a sealing gasket is arranged between the first connecting edge and the second connecting edge.

[0046] In some embodiments, the variable frequency control cabinet further comprises a fastening assembly configured to fix at least one of the heat dissipation assembly, the line-in assembly and the line-out assembly to the cabinet, or fix the cover to the housing.

[0047] The fastening assembly comprises a nut and a screw, the nut is embedded in a through hole on the box or the shell, the nut has a threaded blind hole, and the screw is screwed into the threaded blind hole.

[0048] According to a second aspect of the present disclosure, a variable frequency system is provided, comprising a variable frequency device; and the variable frequency control cabinet of the above-mentioned embodiments, used for controlling the variable frequency device.

[0049] The variable frequency control cabinet of the embodiments of the present disclosure integrates the internal control components in the same box according to the functional module mode, is divided into a safety protection module, a reactor module, a rectification filtering module and a power supply driving module, and each functional module is arranged in a different accommodation area. Such a structure can improve the structural integration and compactness of the variable frequency control cabinet, reduce the wiring distance and cost; moreover, the four accommodation areas can fully utilize the space in the box according to the quadrant division, so as to reduce the volume of the box and also reduce the mutual interference of the functional components in the assembly and working processes; in addition, the functional module division mode facilitates the positioning of the control components and reduces the maintenance difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0051] Figure 1 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0052] Figure 2 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0053] Figure 3 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0054] Figure 4 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0055] Figure 5 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0056] Figure 6 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings: Figure 5

[0057] Figure 7 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0058] Figure 8 The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate the illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0059] ​Figure 9 FIG. 1 is a schematic view of a variable frequency control cabinet according to the present disclosure.

[0060] Legend of reference signs

[0061] 1, cabinet; 11, door body; 12, top wall; 13, first side wall; 14, second side wall; 15, rear wall; 16, lifting ring; 17, extension plate; 18, hinge;

[0062] 2, second mounting bracket; 21, first fan;

[0063] 3, safety protection module; 31, second overcurrent circuit breaker; 32, copper bar;

[0064] 4, electric reactor module; 41, coil;

[0065] 5, rectification and filtering module; 51, strong current sampling plate; 52, first overcurrent circuit breaker; 53, electrical connection terminal; 54, relay; 55, filter; 56, switched capacitor; 57, temperature controller; 58, resistor; 59, third mounting plate;

[0066] 6, power supply driving module; 61, first mounting bracket; 62, mainboard; 63, current sensor; 64, heat dissipation plate; 641, first refrigerant inlet; 642, first refrigerant outlet; 65, first mounting plate; 66, driving plate; 67, capacitor; 68, busbar; 69, second mounting plate;

[0067] 7, heat dissipation assembly; 71, shell assembly; 711, shell; 711', first connecting edge; 712, cover body; 712', second connecting edge; 72, evaporator; 721, second refrigerant inlet; 722, second refrigerant outlet; 73, second fan; 74, water pan; 75, suction accessory; 76, sealing gasket; 77, mounting flange; 78, nut; 79, screw;

[0068] 8, incoming line assembly; 81, locking joint; 82, wiring bar; 83, second mounting flange; 84, pressing plate;

[0069] 9, outgoing line assembly;

[0070] X, width direction; Y, height direction; Z, depth direction; A1, first quadrant;

[0071] A2, second quadrant; A3, third quadrant; A4, fourth quadrant. DETAILED DESCRIPTION

[0072] The present disclosure is described below in detail. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect thus defined can be combined with any other aspect or aspects, unless explicitly stated otherwise. In particular, any feature described as being preferred or advantageous can be combined with any other feature or features described as being preferred or advantageous.

[0073] The terms "first", "second", and the like in the present disclosure are merely intended to facilitate the description and to distinguish different constituent components with the same name, and do not indicate a chronological or primary and secondary relationship.

[0074] In addition, when an element is referred to as being "on" another element, it can be directly on the other element or indirectly on the other element with one or more intervening elements therebetween. Also, when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element with one or more intervening elements therebetween. Hereinafter, like reference numerals refer to like elements.

[0075] The description of the orientation or positional relationship of "upper", "lower", "top", "bottom", "front", "back", "inner", and "outer" and the like in the present disclosure is merely intended to facilitate the description of the present disclosure and is not intended to indicate or imply that a particular orientation of the device is required, constructed, and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present disclosure. As Figure 1 As shown, the width direction X of the cabinet 1 mentioned in the following embodiments is the left-right direction, the height direction Y is the up-down direction, and the depth direction Z is the front-rear direction.

[0076] The present disclosure provides a variable frequency control cabinet, such as Figures 1 to 8 As shown, in some embodiments, the variable frequency control cabinet comprises a cabinet 1, a safety protection module 3, a reactor module 4, a rectification filtering module 5, and a power supply driving module 6.

[0077] The space in the cabinet 1 is divided into four accommodation areas S, and the four accommodation areas S are distributed in quadrants; the safety protection module 3 is arranged in the cabinet 1 and is configured to provide overload protection; the reactor module 4 is arranged in the cabinet 1 and is configured to reduce power frequency transient overvoltage and balance reactive power; the rectification filtering module 5 is arranged in the cabinet 1 and is configured to convert alternating current into direct current and filter out signals at specific frequency points; and the power supply driving module 6 is arranged in the cabinet 1 and is configured to output a power supply. Among them, the safety protection module 3, the reactor module 4, the rectification filtering module 5, and the power supply driving module 6 are respectively arranged in the four accommodation areas S.

[0078] Among them, as Figure 1As shown, the enclosure 1 can be rectangular, and the front wall of the enclosure 1 is provided with a door 11. The door 11 is designed to open and close, allowing the enclosure 1 to be closed or opened. For example, there can be two doors 11, which can be rotated outwards from the middle to facilitate the installation and maintenance of components inside the enclosure 1. Figure 2 As shown, the box body 1 also has a top wall 12, a first side wall 13, a second side wall 14 and a rear wall 15, with the rear wall 15 being disposed opposite to the door body 11.

[0079] The four storage areas S inside the housing 1 are arranged in a quadrant, forming a grid pattern. The upper right storage area S is located in the first quadrant A1, the upper left storage area S is located in the second quadrant A2, the lower left storage area S is located in the third quadrant A3, and the lower right storage area S is located in the fourth quadrant A4. The size distribution of the storage areas S can be set according to the module size, and physical isolation, such as partitions, can be optionally set between adjacent storage areas S.

[0080] After the external AC power enters the frequency converter control cabinet, it first enters the safety protection module 3 to provide overload protection in case of short circuit or overload, preventing damage to other circuits in the frequency converter control cabinet; then it enters the reactor module 4, which is equivalent to a capacitor to reduce the power frequency overvoltage; then it enters the rectifier and filter module 5 to convert the AC power into DC power and filter out signals at specific frequency points; finally, it enters the power drive module 6 to output the power supply.

[0081] In this embodiment, the frequency converter control cabinet integrates the internal control components into a single enclosure 1, arranged in functional modules. These modules are divided into a safety protection module 3, a reactor module 4, a rectifier and filter module 5, and a power drive module 6, with each module housed in a separate storage area S. This allows the power supply cabinet, frequency converter drive cabinet, and terminal block cabinet required in conventional designs to be integrated into a single unit.

[0082] This structure can improve the structural integration and compactness of the frequency converter control cabinet, reduce the volume of the enclosure 1, reduce the requirements for installation space, reduce the wiring distance, and reduce the overall cost. Moreover, the four accommodating areas S are divided according to quadrants, which can make full use of the space inside the enclosure 1 to reduce the volume of the enclosure 1 and reduce mutual interference between functional components during assembly and operation. In addition, the functional module division method makes it easier to locate each control component and reduces the difficulty of maintenance.

[0083] In some embodiments, the safety protection module 3 and the rectifier filter module 5 are respectively located in the two upper receiving areas S, and the reactor module 4 and the power drive module 6 are respectively located in the two lower receiving areas S.

[0084] Specifically, the safety protection module 3 is located in the first quadrant A1, the rectifier and filter module 5 is located in the second quadrant A2, the power drive module 6 is located in the third quadrant A3, and the reactor module 4 is located in the fourth quadrant A4.

[0085] The embodiment sets the heavy weight reactor module 4 and the power drive module 6 in the two accommodation areas S at the lower part, and can realize stable installation of the modules by means of the support of the bottom wall of the cabinet, and the light weight modules can be installed on the top wall 12, the first side wall 13, the second side wall 14 and / or the rear wall 15 of the cabinet 1. Moreover, the reactor module 4 and the power drive module 6 are main heat generating elements, and are set at the lower part to fully utilize the principle that the hot air is light in weight, so that the hot air has sufficient space to flow upward to realize cooling in the process of flowing to the area with lower temperature, and timely take away the heat.

[0086] In some embodiments, as shown in Figure 1 , multiple devices in the safety protection module 3, the reactor module 4, the rectification and filtering module 5 and / or the power drive module 6 are arranged in the depth direction Z of the cabinet 1.

[0087] The embodiment can fully utilize the space in the depth direction Z of the cabinet 1, further improve the integration of the control components in the frequency conversion control cabinet, and reduce the volume of the cabinet 1.

[0088] In some embodiments, as shown in Figure 7 , the reactor module 4 includes multiple coils 41, and the multiple coils 41 are arranged in the depth direction Z.

[0089] The embodiment can make the arrangement of the multiple coils 41 fully utilize the space in the depth direction Z of the cabinet 1, and can arrange more number of coils 41 on the basis of reducing the width of the accommodation area S where the reactor module 4 is located.

[0090] In some embodiments, as shown in Figure 1 and Figure 4 , the power drive module 6 includes: a first mounting frame 61, in which a first mounting plate 65 and a second mounting plate 69 are fixed at intervals from the inside to the outside in the depth direction Z; a heat dissipation plate 64 fixed to the inside of the first mounting plate 65; a drive plate 66 fixed to one side of the heat dissipation plate 64 and passing through the first mounting plate 65; and a main board 62 fixed to the side of the second mounting plate 69 away from the drive plate 66.

[0091] In the embodiment, the devices in the power drive module 6 are arranged in the depth direction Z, and the first mounting frame 61 can be fixed to the cabinet 1, Figure 1 The embodiment shows the outer components in the power drive module 6, and the outer devices include the main board 62, which can be provided in one or more pieces, is fixed to the side of the second mounting plate 69 away from the drive plate 66, and is used to realize control function. Figure 4The inner layer devices in the power supply driving module 6 are shown, including driving boards 66, which can be provided in multiple numbers along the width direction X. Since the driving boards 66 generate a large amount of heat, the driving boards 66 are mounted on the heat dissipation plates 64 to quickly absorb the heat generated by the driving boards 66, and the heat dissipation plates 64 are fixed on the first mounting frame 61 through the first mounting plate 65, and the first mounting frame 61 is fixed on the cabinet 1. Specifically, the first mounting plate 65 can be provided with multiple notches, and the multiple heat dissipation plates 64 are fixed on the first mounting plate 65 and pass through the notches.

[0092] Optionally, the power supply driving module 6 can further include at least one current sensor 63 to detect the current size. At least one capacitor 67 can be provided on the side of the heat dissipation plate 64 away from the driving board 66. The top of the capacitor 67 can be provided with a busbar 68.

[0093] The components in the power supply driving module 6 in this embodiment are stacked along the depth direction Z, which can make full use of the space in the depth direction Z in the cabinet 1, and achieve good heat dissipation to timely take away the heat generated by the power supply driving module 6.

[0094] In some embodiments, as shown in Figure 4 The first heat exchange pipe is provided in the heat dissipation plate 64, and the first heat exchange pipe is used to circulate refrigerant. The first refrigerant inlet 641 and the first refrigerant outlet 642 of the first heat exchange pipe are led out of the cabinet 1.

[0095] In this embodiment, the first heat exchange pipe is provided in the heat dissipation plate 64, which can uniformly and sufficiently exchange heat with the multiple driving boards 66. The heat generated by the driving boards 66 is not directly discharged outward, but is absorbed by the refrigerant to the refrigeration system, and then is discharged outward by the heat exchanger of the refrigeration system. Therefore, the cabinet 1 does not need to be provided with an air inlet and an air outlet, has good sealing performance, and has good waterproof, dustproof and insect-proof effects.

[0096] In some embodiments, as shown in Figure 3 The rectification and filtering module 5 includes a first device layer mounted on the rear wall 15 of the cabinet 1, a third mounting plate 59, a first end of the third mounting plate 59 being connected to the side wall of the cabinet 1 and being rotatably arranged in a plane perpendicular to the height direction Y, and a second device layer mounted on the third mounting plate 59 and located on the side away from the first device layer.

[0097] The third mounting plate 59 is equivalent to a door-shaped structure that can be opened and closed, and the first end of the third mounting plate 59 can be hinged to the side wall corresponding to the accommodation area S where the rectification and filtering module 5 is mounted, as shown in Figure 3As shown, the rectification and filtering module 5 is installed in the second quadrant A2, and the first end of the third mounting plate 59 can be directly hinged to the first side wall 13; or an extension plate 17 is arranged on the first side wall 13, the extension plate 17 is arranged perpendicular to the depth direction Z, the hinge 18 is arranged on the extension plate 17, and the first end of the third mounting plate 59 is connected with the hinge 18.

[0098] The embodiment separates the accommodation area S into two layers along the depth direction Z by the third mounting plate 59, so as to install the devices in layers, and the third mounting plate 59 is arranged rotatably, so as to facilitate the maintenance of the first device layer when the third mounting plate 59 is opened.

[0099] In some embodiments, as shown in Figure 1 and Figure 3 As shown, the first device layer includes a relay 54, a filter 55, a switched capacitor 56, a temperature controller 57 and a resistor 58; and / or the second device layer includes a strong current sampling plate 51, a first overcurrent breaker 52 and an electrical connection terminal 53.

[0100] For example, the resistor 58 can be a wire-wound resistor such as a cement resistor, and the first overcurrent breaker 52 is used for overcurrent protection.

[0101] The embodiment separates the multiple devices in the rectification and filtering module 5 into two layers, which facilitates wiring and reduces interference generated by the first device layer and the second device layer during operation.

[0102] In some embodiments, the safety protection module 3 can include a second overcurrent breaker 31 and a copper bar 32, the second overcurrent breaker 31 is used to disconnect the system loop when the current or voltage exceeds a threshold, so as to provide safety protection.

[0103] In some embodiments, as shown in Figure 3 As shown, the frequency conversion control cabinet further includes a second mounting frame 2 connected to the cabinet 1, used to separate the accommodation area S where the rectification and filtering module 5 is arranged from the accommodation area S adjacent to it in the width direction X of the cabinet 1; wherein the second end of the third mounting plate 59 is selectively fixed to or separated from the second mounting frame 2, and in the state of being separated from the second mounting frame 2, the second mounting frame 2 is allowed to rotate.

[0104] For example, the rectification and filtering module 5 is arranged in the second quadrant A2, and the safety protection module 3 is arranged in the first quadrant A1, and the accommodation areas S where the rectification and filtering module 5 and the safety protection module 3 are arranged can be separated by the second mounting frame 2.

[0105] In some embodiments, as shown in Figure 3 The second end of the second mounting plate 69 can be fixed to the second mounting frame 2 by means of buckles, latches and the like. In the normal state, the second end of the second mounting plate 69 is fixed to the second mounting frame 2; when the first device layer needs to be maintained, the second end of the second mounting plate 69 can be separated from the second mounting frame 2 to open the second mounting plate 69 for maintenance.

[0106] This embodiment can stably mount and fix the second device layer in the normal state, and when maintenance is needed, the second mounting plate 69 can be opened to facilitate maintenance of the first device layer.

[0107] In some embodiments, as shown in Figure 3 The variable frequency control cabinet further comprises a second mounting rack 2 connected to the box 1 and used to separate the containing area S where the rectification and filtering module 5 is located from the containing area S adjacent to it in the width direction X of the box 1, and a first fan 21 arranged on the second mounting rack 2 and having its axis arranged in the width direction X and used to form a circulating air flow in the plane perpendicular to the depth direction Z of the box 1 in the box 1. The circulating air flow can flow clockwise along the arrow direction in Figure 3 , or can also flow counterclockwise.

[0108] For example, the rectification and filtering module 5 is arranged in the second quadrant A2, and the safety protection module 3 is arranged in the first quadrant A1. The containing areas S where the rectification and filtering module 5 and the safety protection module 3 are located can be separated by the second mounting rack 2. No physical separation is arranged between the first quadrant A1 and the fourth quadrant A4 and between the second quadrant A2 and the third quadrant A3, which facilitates air flow circulation and improves temperature distribution uniformity.

[0109] This embodiment can generate a circulating air flow in the XY plane when the first fan 21 is working, intensify air flow disturbance, strengthen hot and cold air mixing, promote heat dissipation of the heat dissipation plate 64, facilitate uniform temperature distribution in the box 1, and ensure safety of electrical components and safe operation of the variable frequency control cabinet, so as to avoid local temperature exceeding the limit temperature of electrical components and causing failure alarm.

[0110] In some embodiments, as shown in Figure 5 The variable frequency control cabinet further comprises a heat dissipation assembly 7, which comprises a housing assembly 71 mounted outside the box 1 and a second fan 73 arranged in the housing assembly 71 and having its axis arranged in the depth direction Z of the box 1. The housing assembly 71 is in communication with the box 1 at least at the position where the second fan 73 is arranged, and the second fan 73 is used to form a circulating air flow in the plane perpendicular to the height direction Y of the box 1 in the box 1. The circulating air flow can flow counterclockwise along the arrow direction in Figure 7 , or can also flow clockwise.

[0111] For example, the second fan 73 can be arranged in one or at least two in parallel in the height direction Y. The housing assembly 71 can be a whole structure, or can also be arranged in a split structure, for example, comprising a housing 711 and a cover 712 used to cover the opening of the housing 711. This structure facilitates installation of components in the heat dissipation assembly 7.

[0112] The embodiment can further strengthen the heat dissipation effect of the area with large heat generation by arranging the heat dissipation assembly 7 outside the cabinet 1, the circulating air flow can strengthen the air flow disturbance in the cabinet 1, strengthen the mixing of cold and hot air, and facilitate the uniform distribution of temperature in the cabinet 1, thereby ensuring the safety of the electrical components and the safe operation of the frequency conversion control cabinet. Moreover, the heat dissipation assembly 7 is arranged outside the cabinet 1, without occupying the installation space of each electrical component, so that the structure of the entire frequency conversion control cabinet is relatively compact.

[0113] In some embodiments, as shown in Figure 5 The frequency conversion control cabinet further comprises a heat dissipation assembly 7, and the heat dissipation assembly 7 comprises a shell assembly 71 arranged outside the cabinet 1 and an evaporator 72 arranged in the shell assembly 71. The second heat exchange pipe of the evaporator 72 is used for circulating refrigerant, and the second refrigerant inlet 721 and the second refrigerant outlet 722 of the second heat exchange pipe are led out of the shell assembly 71.

[0114] The shell assembly 71 can be a cuboid, the evaporator 72 and the second fan 73 can be arranged side by side along the width direction X, and the two can be separated by a partition plate. The circulating air flow generated by the second fan 73 can also promote the heat exchange of the evaporator 72, so that the refrigerant can timely take away the heat in the cabinet 1. For example, the evaporator 72 can be a finned tube evaporator.

[0115] The embodiment can directly take away the heat in the cabinet 1 through the externally introduced refrigerant by arranging the heat dissipation assembly 7 outside the cabinet 1 and arranging the evaporator 72 in the heat dissipation assembly 7, which is conducive to the uniform distribution of temperature in the cabinet 1, thereby ensuring the safety of the electrical components and the safe operation of the frequency conversion control cabinet. The heat generated in the cabinet 1 is not directly discharged outward, but is absorbed by the refrigerant in the evaporator 72 to the refrigeration system, and then discharged outward by the heat exchanger of the refrigeration system. Therefore, the cabinet 1 or the shell assembly 71 does not need to be provided with an air inlet and an air outlet, has good sealing performance, and has good waterproof, dustproof and insect-proof effects.

[0116] In some embodiments, as shown in Figure 5 The heat dissipation assembly 7 further comprises a water collecting tray 74 arranged in the shell assembly 71 and located at the bottom of the evaporator 72, which is used for collecting the water generated during the operation of the evaporator 72.

[0117] The embodiment can timely collect the water generated during the operation of the evaporator 72 by arranging the water collecting tray 74 at the bottom of the evaporator 72, prevent the water from flowing to other areas in the shell assembly 71 or the cabinet 1 to affect the operation of the second fan 73 or the electrical components, and also increase the period of discharging the water generated during the operation of the evaporator 72, without the need to arrange a special drain pipe.

[0118] In some embodiments, as shown in Figure 2 The frequency conversion control cabinet further comprises:

[0119] The heat dissipation assembly 7 is installed outside the cabinet 1 and corresponds to the accommodating area S where the reactor module 4 is located.

[0120] The incoming line assembly 8 is installed outside the cabinet 1 and corresponds to the accommodating area S where the safety protection module 3 is located. The incoming line assembly 8 is used to provide external power supply to the variable frequency control cabinet; and / or

[0121] The outgoing line assembly 9 is installed outside the cabinet 1 and corresponds to the accommodating area S where the power supply driving module 6 is located. The outgoing line assembly 9 is used to provide the power supply output by the power supply driving module 6 to the variable frequency device.

[0122] Optionally, the heat dissipation assembly 7, the incoming line assembly 8 and the outgoing line assembly 9 can also be arranged inside the cabinet 1 and sealed by locking joints at the incoming line hole and the outgoing line hole.

[0123] Since the reactor module 4 generates a large amount of heat, the heat dissipation assembly 7 is arranged outside the cabinet 1 and corresponds to the accommodating area S where the reactor module 4 is located. Thus, the heat generated by the reactor module 4 can be efficiently taken away, local overheating can be avoided, and the flow of heat in this area to other areas inside the cabinet 1 can be reduced, thereby ensuring the safety of the operation of the electrical components.

[0124] Since the external power supply first enters the safety protection module 3, the incoming line assembly 8 is arranged outside the cabinet 1 and corresponds to the accommodating area S where the safety protection module 3 is located. Thus, the length of the incoming line can be reduced, wiring can be facilitated, and the influence on the operation of the electrical components in other areas can be reduced.

[0125] Since the power supply provided by the variable frequency control cabinet is finally output by the power supply driving module 6, the outgoing line assembly 9 is arranged outside the cabinet 1 and corresponds to the accommodating area S where the power supply driving module 6 is located. Thus, the length of the outgoing line can be reduced, wiring can be facilitated, and the influence on the operation of the electrical components in other areas can be reduced.

[0126] Specifically, the safety protection module 3 is arranged in the first quadrant A1, the rectification and filtering module 5 is arranged in the second quadrant A2, the power supply driving module 6 is arranged in the third quadrant A3, and the reactor module 4 is arranged in the fourth quadrant A4. The heat dissipation assembly 7 can be arranged in the lower part of the rear wall 15 and corresponds to the reactor module 4, the incoming line assembly 8 can be arranged in the upper part of the second side wall 14 and corresponds to the safety protection module 3, and the outgoing line assembly 9 can be arranged in the lower part of the rear wall 15 and corresponds to the power supply driving module 6.

[0127] In some embodiments, as Figure 5 , 6At least one of the heat dissipation assembly 7, the incoming line assembly 8 and the outgoing line assembly 9 comprises a housing assembly 71, which comprises a housing 711 and a cover 712 used for covering an opening of the housing 711, and a first connecting edge 711' of the housing 711 and a second connecting edge 712' of the cover 712 form a planar fit or a stepped fit.

[0128] In this embodiment, the housing assembly 71 is designed as a split structure, which facilitates the installation of the internal structural members, and the connection between the housing 711 and the cover 712 forms a planar fit or a stepped fit, which can extend the width of the fit part and increase the path for external dust, water vapor and the like to enter the housing assembly 71, thereby improving the sealing performance of the housing assembly 71, meeting the high waterproof level, and achieving good dustproof and insect-proof effects, which can meet the outdoor use requirements of the frequency conversion control cabinet.

[0129] In some embodiments, a sealing gasket 76 is arranged between the first connecting edge 711' and the second connecting edge 712'.

[0130] In this embodiment, the sealing gasket 76 arranged between the first connecting edge 711' and the second connecting edge 712' can further improve the sealing effect, so that the air inside and outside the housing assembly 71 is not communicated, thereby further improving the waterproof level and optimizing the dustproof and insect-proof effects.

[0131] In some embodiments, as shown in Figs. Figure 6 and Figure 9 The frequency conversion control cabinet further comprises a fastening assembly for fixing at least one of the heat dissipation assembly 7, the incoming line assembly 8 and the outgoing line assembly 9 to the cabinet 1, or fixing the cover 712 to the housing 711. The fastening assembly comprises a nut 78 and a screw 79, the nut 78 is embedded in a through hole on the cabinet 1 or the housing 711, the nut 78 has a threaded blind hole, and the screw 79 is screwed into the threaded blind hole.

[0132] In this embodiment, the fastening assembly can be arranged at intervals along the circumference of the connecting edge, and the interval is determined according to the thickness of the plate, the diameter of the thread and the hardness of the sealing gasket 76. The nut 78 can be fixed in the through hole by welding, for example, the side wall of the nut 78 is welded with the through hole to increase the sealing performance.

[0133] In this embodiment, the fastening assembly can be arranged at intervals along the circumference of the connecting edge, and the interval is determined according to the thickness of the plate, the diameter of the thread and the hardness of the sealing gasket 76. The nut 78 can be fixed in the through hole by welding, for example, the side wall of the nut 78 is welded with the through hole to increase the sealing performance.

[0134] Specifically, as shown in Figs. Figure 5As shown, the heat dissipation assembly 7 includes a housing 711 and a cover 712. The opening of the housing 711 is located on the wall opposite to the rear wall 15 of the housing 1, and the cover 712 covers the opening of the housing 711. The housing 711 has a first connecting edge 711' that folds outward at the opening, and the edge of the cover 712 has a first bent edge that bends towards the housing 711. The edge of the main body of the cover 712 serves as a second connecting edge 712', which is fixed to the first connecting edge 711' by a fastening assembly. The first bent edge is located outside the first connecting edge 711' to shield the connection point between the first connecting edge 711' and the cover 712. By providing the first connecting edge 711', the connection area can be increased, thus increasing the sealing performance. A sealing gasket 76 can be provided between the first connecting edge 711' and the cover 712.

[0135] In order to fix the housing assembly 71 of the heat dissipation component 7 to the housing 1, such as Figure 5 and Figure 6 As shown, the edge connecting the housing 711 and the box 1 is bent inward to form a second bent edge. A sealing gasket 76 is provided between the second bent edge and the box 1. A mounting flange 77 is attached to the inner wall of the box 1. The second bent edge, the sealing gasket 76, the box 1 and the mounting flange 77 are fixed by a fastening assembly. A nut 78 passes through the second bent edge, the sealing gasket 76, the box 1 and the mounting flange 77 in sequence. A screw 79 is screwed into the threaded blind hole in the nut 78.

[0136] Optionally, an adsorption element 75 may be provided on the inner wall of the housing assembly 71 to adsorb water vapor or impurities inside the housing assembly 71. For example, the adsorption element 75 may be a sponge.

[0137] like Figure 8 As shown, the incoming line assembly 8 includes a housing 711 and two covers 712. The openings of the housing 711 are located at both ends along the height direction Y, and the two covers 712 respectively cover the openings at the upper and lower ends of the housing 711.

[0138] Specifically, for the upper cover 712, the opening at the top of the housing 711 is located in the middle region. A first connecting edge 711' is provided around the opening at the top of the housing 711. The first connecting edge 711' is stepped and includes a first plate and a second plate. One end of the first plate is connected to the top of the housing 711 and extends upwards. The second plate is connected to the other end of the first plate and is also stepped, extending first outwards from the opening, then downwards, and then in a direction away from the opening. A second connecting edge 712' is provided on the outer peripheral edge of the cover 712. The second connecting edge 712' engages with the second plate of the first connecting edge 711' and is fixed by a fastening assembly.

[0139] For the lower cover 712, the opening of the bottom of the shell 711 is arranged in the middle area, the part of the bottom of the shell 711 outside the periphery of the opening forms a first connecting edge 711', the edge part of the lower cover 712 forms a second connecting edge 712', and the first connecting edge 711' and the second connecting edge 712' are provided with a sealing gasket 76, and the wall surface of the lower cover 712 away from the shell 711 can be attached with a second mounting flange 83 to increase the rigidity. The first connecting edge 711', the sealing gasket 76, the cover 712 and the second mounting flange 83 can be fixed by a fastening assembly.

[0140] The shell 711 is provided with openings at the top and bottom, which can meet the requirements of the user for the upgoing or downgoing line under the premise of ensuring the sealing.

[0141] In order to realize the installation of the shell assembly 71 of the incoming line assembly 8 in the box body 1, the upper and lower edges of the shell 711 are each provided with a third bent edge folded outward, the third bent edge is provided with a sealing gasket 76, the inner wall of the box body 1 is provided with a mounting flange 77, the outer side of the third bent edge is provided with a pressing plate 84, and the pressing plate 84, the third bent edge, the sealing gasket 76 and the mounting flange 77 are fixed by a fastening assembly.

[0142] The incoming line assembly 8 can be provided with a locking joint 81 and a wiring row 82, the locking joint 81 is arranged on the bottom cover 712 for introducing external power supply, and the wiring row 82 is arranged on the side wall of the shell assembly 71 close to the box body 1 and penetrates into the box body 1 from the shell assembly 71 to realize incoming line.

[0143] As shown in Figure 9 The lifting ring 16 is installed on the top wall 12 of the box body 1, the top wall 12 is provided with a through hole, the nut 78 is embedded in the through hole, one end of the lifting ring 16 is provided with a threaded section and is screwed into the threaded blind hole of the nut 78.

[0144] The embodiments of the present disclosure can meet higher waterproof level by the cooperation structure of the first connecting edge 711' and the second connecting edge 712', the sealing gasket 76, the specific fastening assembly, the adoption of refrigerant to take away heat and other measures, can reach XP5 waterproof level, can also prevent dust and water, can adapt to outdoor installation environment, does not need to be provided with a canopy top, and can reduce the size.

[0145] The heat dissipation assembly 7, the incoming line assembly 8 and the outgoing line assembly 9 can adopt a box-shaped welded structure, have sealing property, and the box body 1 and the shell assembly 71 can form a sealed connection.

[0146] Moreover, in terms of heat dissipation, by arranging the first fan 21 and the second fan 73, a bidirectional air circulation can be formed, and the bidirectional air circulation can further strengthen air mixing, promote heat exchange between the heat dissipation plate 64 and the evaporator 72, improve the heat dissipation capacity of the frequency conversion control cabinet to the outside, maintain the temperature uniformity of each area in the box body 1, avoid local overheating, and ensure the working safety of the electrical components. Specifically, the evaporator 72 is used to absorb heat in the box body 1, and the heat is taken away by the refrigerant and discharged to the outside through the heat exchanger of the whole machine system. The fan is used to drive air circulation, so that the hot air entering the evaporator 72 is cooled and becomes cold air, and then returns to the box body 1. In this way, the air circulation is repeated, and the air does not need to be directly exchanged with the atmosphere, so there is no air inlet and outlet, which can well achieve waterproof, dustproof and insect prevention.

[0147] Secondly, the present disclosure also provides a frequency conversion system, which in some embodiments includes: a frequency conversion device; and the frequency conversion control cabinet of the above-mentioned embodiments, used for controlling the frequency conversion device. Wherein, the frequency conversion device can be a frequency conversion compressor, such as a wind-cooled or water-cooled screw compressor unit, or the frequency conversion device can also be a frequency conversion fan, etc.

[0148] Since the frequency conversion control cabinet has high integration and small size, it can be conveniently used with the frequency conversion device, can reduce the requirement for installation space, and is easy to install without the need to arrange multiple independent cabinet bodies. Moreover, when the frequency conversion device works abnormally, the box body 1 can be opened to conveniently troubleshoot the fault, which can reduce the maintenance difficulty.

[0149] The above describes in detail the frequency conversion control cabinet and the frequency conversion system provided by the present disclosure. The principles and implementation modes of the present disclosure are described by applying specific embodiments, and the above description of the embodiments is only used to help understand the method of the present disclosure and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present disclosure, the present disclosure can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present disclosure.

Claims

1. A frequency converter control cabinet, characterized in that, include: The box (1) has a space inside which is divided into four accommodating areas (S), and the four accommodating areas (S) are distributed in quadrants; The safety protection module (3), located inside the enclosure (1), is configured to provide overload protection; The reactor module (4) is located inside the enclosure (1) and is configured to reduce power frequency transient overvoltage and balance reactive power. A rectifier and filter module (5), located within the housing (1), is configured to convert alternating current to direct current and filter out signals at specific frequency points; and The power drive module (6) is located inside the housing (1) and is configured to output power supply; The safety protection module (3), reactor module (4), rectifier and filter module (5), and power drive module (6) are respectively located in the four accommodating areas (S); multiple devices in the safety protection module (3), reactor module (4), rectifier and filter module (5), and / or power drive module (6) are stacked along the depth direction (Z) of the housing (1); The power drive module (6) includes: a first mounting bracket (61) in which a first mounting plate (65) and a second mounting plate (69) are fixed at intervals from the inside to the outside along the depth direction (Z); a heat sink (64) fixed to the inside of the first mounting plate (65); a drive plate (66) fixed to one side of the heat sink (64) and passing through the first mounting plate (65); and a main board (62) fixed to the side of the second mounting plate (69) away from the drive plate (66).

2. The frequency converter control cabinet according to claim 1, characterized in that, The safety protection module (3) and the rectifier filter module (5) are respectively located in the two upper receiving areas (S), and the reactor module (4) and the power drive module (6) are respectively located in the two lower receiving areas (S).

3. The frequency converter control cabinet according to claim 1, characterized in that, The reactor module (4) includes a plurality of coils (41), which are stacked along the depth direction (Z).

4. The frequency converter control cabinet according to claim 1, characterized in that, The heat dissipation plate (64) is provided with a first heat exchange tube, which is used to circulate refrigerant. The first refrigerant inlet (641) and the first refrigerant outlet (642) of the first heat exchange tube are led to the outside of the housing (1).

5. The frequency converter control cabinet according to claim 1, characterized in that, The rectifier and filter module (5) includes: The first device layer is mounted on the rear wall (15) of the housing (1); A third mounting plate (59), the first end of which is connected to the side wall of the housing (1), and is rotatably disposed in a plane perpendicular to the height direction (Y) of the housing (1); and The second device layer is mounted on the third mounting plate (59) and is located on the side away from the first device layer.

6. The frequency converter control cabinet according to claim 5, characterized in that, The first device layer includes: a relay (54), a filter (55), a switched capacitor (56), a temperature controller (57), and a resistor (58); and / or The second device layer includes: a high-voltage sampling board (51), a first overcurrent circuit breaker (52), and an electrical connection terminal (53).

7. The frequency converter control cabinet according to claim 5, characterized in that, Also includes: The second mounting bracket (2) is connected to the housing (1) and is used to separate the rectifier filter module (5) in the housing area (S) and the adjacent housing areas (S) in the width direction (X) of the housing (1). The second end of the third mounting plate (59) can be selectively fixed to or detached from the second mounting bracket (2), and the second mounting bracket (2) is allowed to rotate when detached from the second mounting bracket (2).

8. The frequency converter control cabinet according to any one of claims 1 to 7, characterized in that, Also includes: The second mounting bracket (2), connected to the housing (1), is used to separate the receiving area (S) where the rectifier filter module (5) is located from the adjacent receiving areas (S) in the width direction (X) of the housing (1); and A first fan (21) is mounted on the second mounting bracket (2), and the axis of the first fan (21) is arranged along the width direction (X) to form a circulating airflow in the plane perpendicular to the depth direction (Z) of the housing (1).

9. The frequency converter control cabinet according to any one of claims 1 to 7, characterized in that, Also includes: Heat dissipation assembly (7), the heat dissipation assembly (7) comprising: Housing assembly (71), mounted outside the housing (1); and A second fan (73) is disposed within the housing assembly (71), and the axis of the second fan (73) is arranged along the depth direction (Z) of the housing (1); The housing assembly (71) is connected to the housing (1) at least at the location of the second fan (73), and the second fan (73) is used to form a circulating airflow in a plane perpendicular to the height direction (Y) of the housing (1).

10. The frequency converter control cabinet according to any one of claims 1 to 7, characterized in that, Also includes: Heat dissipation assembly (7), the heat dissipation assembly (7) comprising: The housing assembly (71) is installed outside the housing (1); and An evaporator (72) is disposed within the housing assembly (71), and a second heat exchange tube of the evaporator (72) is used for circulating refrigerant. The second refrigerant inlet (721) and the second refrigerant outlet (722) of the second heat exchange tube are led to the outside of the housing assembly (71).

11. The frequency converter control cabinet according to claim 10, characterized in that, The heat dissipation assembly (7) also includes: A water collection tray (74) is provided inside the housing assembly (71) and located at the bottom of the evaporator (72) for collecting water generated by the operation of the evaporator (72).

12. The frequency converter control cabinet according to any one of claims 1 to 7, characterized in that, Also includes: The heat dissipation component (7) is installed outside the enclosure (1), and the installation area corresponds to the receiving area (S) where the reactor module (4) is located; The incoming line assembly (8) is installed outside the enclosure (1), and the installation area corresponds to the receiving area (S) where the safety protection module (3) is located; and / or The outgoing component (9) is installed outside the housing (1), and the installation area corresponds to the receiving area (S) where the power drive module (6) is located.

13. The frequency converter control cabinet according to claim 12, characterized in that, At least one of the heat dissipation assembly (7), the inlet assembly (8), and the outlet assembly (9) includes a housing assembly (71), the housing assembly (71) including a housing (711) and a cover (712), the cover (712) being used to cover the opening of the housing (711), and the first connecting edge (711') of the housing (711) and the second connecting edge (712') of the cover (712) forming a planar fit or a stepped fit.

14. The frequency converter control cabinet according to claim 13, characterized in that, A sealing gasket (76) is provided between the first connecting edge (711') and the second connecting edge (712').

15. The frequency converter control cabinet according to claim 13, characterized in that, It also includes fastening components for securing at least one of the heat dissipation component (7), the inlet component (8) and the outlet component (9) to the housing (1), or for securing the cover (712) to the housing (711). The fastening assembly includes a nut (78) and a screw (79), wherein the nut (78) is embedded in a through hole in the housing (1) or the shell (711), the nut (78) has a threaded blind hole, and the screw (79) is screwed into the threaded blind hole.

16. A frequency conversion system, characterized in that, include: Variable frequency drive (VFD) equipment; and The frequency converter control cabinet according to any one of claims 1 to 15 is used to control the frequency converter equipment.

Images