Combination box and frequency converter combination

Abstract

The utility model provides a combination box and a frequency converter combination, the frequency converter combination comprises at least two frequency converters and a combination box, and each frequency converter is accommodated in the combination box. The combined box comprises a box body which is provided with a top opening and can accommodate at least two frequency converters; the cover plate covers the top opening of the box body; the input connector is installed on the side wall of the box body, the outer end of the input connector is used for being electrically connected with an external power supply, and the inner end of the input connector is used for being connected with each frequency converter; and the plurality of output connectors are installed on the side wall of the box body and are in one-to-one correspondence with the frequency converters, the inner ends of the output connectors are connected with the frequency converters, and the outer ends of the output connectors are used for being connected with external industrial equipment. According to the invention, the plurality of frequency converters are integrated in the same box body, so that the occupied space of each frequency converter is reduced, and the wiring of each frequency converter is more regular.

Description

Technical Field

[0001] The present application belongs to the technical field of frequency converters, and more specifically, relates to a combination box and a frequency converter combination. Background Art

[0002] The frequency converter is a power control device that uses the on-off function of power semiconductor devices to convert an AC power supply with fixed voltage and frequency into an AC power supply with adjustable voltage and frequency. It controls the AC motor by changing the frequency of the motor's working power supply.

[0003] Typically, a single inverter is used with a single piece of industrial equipment. However, with technological advancements, the vacuum pump industry has evolved into dual-pump and even multi-pump equipment. Dual-pump vacuum machines utilize two vacuum pumps operating simultaneously. Because conventional inverters were typically single-unit designs, they were unable to meet the requirements of a single inverter driving dual-pump vacuum machines. To achieve dual-pump operation, two or even more inverters had to be placed side by side, leading to drawbacks such as excessive space usage and irregular cable wiring. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a combination box and inverter combination to solve the technical problems in the prior art that multiple inverters need to be placed side by side to match dual pump equipment, resulting in large space occupation and irregular wiring.

[0005] To achieve the above purpose, the technical solution adopted in this application is to provide a combined box, including:

[0006] a box having a top opening and capable of accommodating at least two inverters;

[0007] a cover plate, covering the top opening of the box body;

[0008] An input connector is mounted on a side wall of the box, wherein the outer end of the input connector is used to be electrically connected to an external power supply, and the inner end of the input connector is used to be connected to each of the inverters;

[0009] A plurality of output connectors are installed on the side wall of the box and are arranged one-to-one corresponding to each of the frequency converters. The inner ends of the output connectors are connected to the frequency converters, and the outer ends of the output connectors are used to connect to external industrial equipment.

[0010] In some embodiments, a radiator is further installed on the outer side of the bottom of the box, and the radiator extends along the distribution direction of each of the inverters.

[0011] In some embodiments, the radiator includes a heat dissipation plate disposed on the outer side of the bottom of the box and extending along the distribution direction of each of the inverters, and a fluid channel is disposed in the heat dissipation plate.

[0012] In some embodiments, the bottom of the box has at least two through slots for each of the inverters to pass through, and a sealing gasket is abutted between the heat sink and the box.

[0013] In some embodiments, the input connector and each of the output connectors are PG connectors.

[0014] In some embodiments, the side walls of the box are further provided with network connectors corresponding to the inverters, and the network connectors are PG connectors;

[0015] And / or, the side wall of the box body is further provided with at least one control connector, and the control connector is a PG connector.

[0016] In some embodiments, the input connector and each of the output connectors are located on the same side of the box.

[0017] In some embodiments, a sealing member is provided between the periphery of the cover plate and the box body.

[0018] On the other hand, the present application also provides an inverter combination, including at least two inverters and the above-mentioned combination box, and each of the inverters is respectively accommodated in the combination box.

[0019] In some embodiments, the inverters are sequentially distributed in the box along a first direction, and the capacitor components of two adjacent inverters are installed between the two adjacent inverters.

[0020] The beneficial effects of the combination box and inverter combination provided in the present application are: through the setting of the box body and the cover plate, multiple inverters can be integrated in the same box body, which can greatly reduce the space occupied by each inverter compared to the separate packaging of each inverter; at the same time, the setting of the input connector and multiple output connectors makes it possible for multiple inverters to be electrically connected to the external power supply outside the box body through only one cable, and to electrically connect each output connector to each industrial equipment through multiple cables, thereby simplifying the number of cables outside the combination box and making the wiring of each inverter neater and more regular. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of the inverter assembly provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a frequency converter assembly provided in another embodiment of the present application;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of the inverter assembly provided in an embodiment of the present application with the cover removed;

[0025] Figure 4 A schematic diagram of the exploded structure of the combination box provided in an embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the box body in the combination box provided in an embodiment of the present application.

[0027] Among them, the reference numerals in the figures are:

[0028] 100, combination box; 110, box body; 111, bottom plate; 112, side plate; 113, flange; 114, support surface; 115, through groove; 116, mounting hole; 120, cover plate; 130, input connector; 140, output connector; 150, network connector; 160, control connector; 170, seal; 180, radiator; 181, heat sink; 1811, fluid channel; 190, sealing gasket; 191, first sealing strip; 192, second sealing strip; 101, mounting part; 1011, first bonding plate; 1012, second bonding plate; 1013, slot; 200, inverter; 210, inverter module; 220, capacitor assembly; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered sequence. Thus, features defined with "first", "second" can include one or more of the features explicitly or implicitly.

[0033] Please refer to Figures 1 to 3 The combination box 100 provided by the embodiments of the present application will be described. The combination box 100 is used to integrate at least two frequency converters 200 together to reduce the occupied space of each frequency converter 200 and improve the irregular wiring problem of each frequency converter 200.

[0034] The combination box 100 includes a box body 110, a cover plate 120, an input connector 130 and a plurality of output connectors 140. The box body 110 has a top opening and can accommodate at least two frequency converters 200. The cover plate 120 is arranged on the top opening of the box body 110. The input connector 130 is mounted on the side wall of the box body 110. The outer end of the input connector 130 is used for electrical connection with an external power supply, and the inner end of the input connector 130 is used for connection with each frequency converter 200. Each output connector 140 is mounted on the side wall of the box body 110 and is arranged one-to-one corresponding to each frequency converter 200. The inner end of the output connector 140 is connected with the frequency converter 200, and the outer end of the output connector 140 is used for connection with an external industrial equipment.

[0035] The external power supply refers to an external alternating current power supply with fixed voltage and frequency. The frequency converter 200 is used to convert the alternating current power supply with fixed voltage and frequency into an alternating current power supply with adjustable voltage and frequency.

[0036] The external industrial equipment can be a multi-pump device in the vacuum pump industry, or other industrial equipment that needs to be matched with multiple frequency converters 200, such as air conditioner fans or compressors, etc.

[0037] The box body 110 can accommodate at least two frequency converters 200. The size of the box body 110 can be matched according to the number of frequency converters 200 required, for example, two, three, four or more frequency converters 200 can be put into the box body 110 with matching size.

[0038] When multiple frequency converters 200 are needed to be used with multiple industrial devices, the multiple frequency converters 200 can be respectively installed in the box body 110, the input ends of the frequency converters 200 are respectively connected with the inner ends of the input connector 130 through cables, the output ends of the frequency converters 200 are respectively connected with the inner ends of the corresponding output connectors 140 through cables, and then the cover plate 120 is covered; then, the outer end of the input connector 130 is connected with an external power supply through a cable, and the outer ends of the output connectors 140 are respectively connected with corresponding external industrial devices through cables, so as to complete the wiring of the frequency converters 200.

[0039] The combination box 100 in the embodiment of the present application can integrate multiple frequency converters 200 in the same box body 110 through the setting of the box body 110 and the cover plate 120, which can greatly reduce the occupied space of the frequency converters 200 compared with the separate packaging of the frequency converters 200; at the same time, the setting of the input connector 130 and the multiple output connectors 140 makes the multiple frequency converters 200 only need to be connected with an external power supply through one cable outside the box body 110, and connected with multiple industrial devices through multiple cables, so as to simplify the number of cables outside the combination box 100, and make the wiring of the frequency converters 200 more neat and regular.

[0040] In some embodiments, referring to Figures 1 to 3 , the input connector 130 and the output connectors 140 are PG connectors. The PG connector is also called a process connector or a protective grounding connector, which is a waterproof connector that can be used with a cable. The side wall of the box body 110 is provided with multiple mounting holes 116, and the input connector 130 and the output connectors 140 are mounted at the mounting holes 116 and can lock the cable to form a sealed electrical connection. The PG connector not only has the functions of waterproofing and dustproofing, but also has sealing property, which can ensure the safety and reliability of the cable connection and prevent phenomena such as sparking or temperature rise caused by poor electrical connection.

[0041] In some embodiments, the side wall of the box body 110 corresponding to each frequency converter 200 is further provided with a network connector 150, and the network connector 150 is a PG connector. Specifically, the inner end of the network connector 150 is electrically connected with the communication module of each frequency converter 200, and the outer end of the network connector 150 is connected with an external control or monitoring device, so as to realize remote monitoring or control of the working of the frequency converters 200. In addition, the network connector 150 is a PG connector, which can achieve the purposes of waterproofing and dustproofing. It can be understood that in other embodiments of the present application, the number of network connectors 150 can be selected according to actual needs, and even when the frequency converters 200 can work independently, the network connector 150 can also not be provided, which is not limited herein.

[0042] In some embodiments, the sidewall of the housing 110 is further provided with at least one control connector 160, which is a PG connector. The inner end of the control connector 160 is electrically connected to the control board of each inverter 200, and the outer end of the control connector 160 is electrically connected to external industrial equipment. The number of control connectors 160 can be set based on the needs of the external industrial equipment. A control connector 160 can be provided for each inverter 200, or only for some inverters 200.

[0043] As an example, see Figure 1 The housing 110 contains two inverters 200. A network connector 150, which is a PG connector, is provided on the sidewall of the housing 110, corresponding to each inverter 200. A control connector 160, which is a PG connector, is also provided on the sidewall of the housing 110, corresponding to one of the inverters 200.

[0044] As an example, see Figure 2 The box 110 contains three inverters 200. A network connector 150, which is a PG connector, is provided on the sidewall of the box 110, corresponding to each inverter 200. A control connector 160, which is a PG connector, is also provided on the sidewall of the box 110, corresponding to two of the inverters 200.

[0045] In some embodiments, see Figures 1 to 4 The input connector 130, output connector 140, network connector 150, and control connector 160 are all located on the same side wall of the housing 110. This arrangement facilitates wiring of the inverters 200 and also facilitates the structural layout of the inverters 200 and various industrial equipment, ensuring neat and regular wiring.

[0046] In some embodiments, see Figure 4 A seal 170 is provided between the periphery of the cover 120 and the box body 110. The seal 170 ensures the sealing between the cover 120 and the box body 110, and can effectively isolate dust and condensation from penetrating.

[0047] Optionally, the sealing member 170 is a sealing strip with a Hauer hardness of 40, and the cover 120 and the box body 110 are fastened by screws to compress the sealing strip, thereby achieving effective sealing.

[0048] Optionally, see Figure 4 and Figure 5The top periphery of the box body 110 is radially inwardly contracted to form a flange 113, and a support surface 114 is formed on the outer periphery of the top of the box body 110. The sealing strip is arranged on the support surface 114. The periphery of the cover plate 120 is sleeved outside the flange 113 and abuts against the sealing strip. The periphery of the cover plate 120 is locked to the support surface 114 by screws to achieve sealing.

[0049] In some embodiments, see Figures 1 to 4 A radiator 180 is also installed on the outside of the bottom of the housing 110, extending along the distribution direction of each inverter 200. This arrangement allows heat to be dissipated separately for each inverter 200 through the radiator 180, eliminating the need to dissipate heat for each inverter 200. While still meeting the heat dissipation requirements of each inverter 200, the number of radiators 180 is reduced, simplifying the entire inverter assembly. It is understood that in other embodiments of the present application, a radiator 180 may be installed at the bottom of the housing 110 corresponding to each inverter 200, and this is not intended to be a sole limitation.

[0050] In some embodiments, see Figures 1 to 3 The radiator 180 includes a heat sink 181 disposed on the outside of the bottom of the housing 110 and extending along the distribution direction of the inverters 200. A fluid channel 1811 is provided within the heat sink 181. The internal fluid channel 1811 is designed to fully utilize the flow of coolant to quickly remove heat, effectively improving the heat dissipation effect, enabling more efficient cooling and ensuring stable operation of the inverters 200. It is understood that in other embodiments of the present application, the radiator 180 may also dissipate heat through other methods, such as by providing heat sinks.

[0051] Optionally, the heat sink 181 is made of aluminum, which has good thermal conductivity and is conducive to rapid heat dissipation. It is understandable that in other embodiments, the heat sink 181 can also be made of materials with good heat dissipation such as silver, copper, copper-based alloy, or aluminum alloy.

[0052] In some embodiments, see Figures 3 to 5 The bottom of the box body 110 has at least two through slots 115 for each inverter 200 to pass through, and a sealing gasket 190 is abutted between the heat dissipation plate 181 and the box body 110.

[0053] The number of the through slots 115 is the same as the number of the inverters 200 , and each through slot 115 allows the bottom of an inverter 200 to pass through so as to be attached to the heat dissipation plate 181 .

[0054] During assembly, the inverter module 210 (IGBT: insulated gate bipolar transistor) in the inverter 200 can be directly placed on the heat sink 181 and fastened to the heat sink 181 using screws or bolts. The sealing gasket 190 is then placed on the heat sink 181 and fastened to the housing 110.

[0055] In this embodiment, the provision of the through slot 115 allows the bottom of the inverter 200 to be directly attached to the heat sink 181, achieving rapid heat dissipation of the inverter 200. The provision of the sealing gasket 190 can achieve a seal between the heat sink 181 and the housing 110, thereby isolating dust and condensation from entering the interior of the housing 110.

[0056] In some embodiments, see Figure 1 and Figure 2 The opposite end surfaces of the heat sink 181 along the first direction X are flush with the opposite end surfaces of the housing 110 along the first direction X. The inlet and outlet of the fluid channel 1811 are located on the end surfaces of the heat sink 181 along the first direction X. The opposite end surfaces of the heat sink 181 along the second direction Y are recessed relative to the opposite end surfaces of the housing 110 along the second direction Y. The first direction X is the distribution direction of the inverters 200 within the housing 110, and the second direction Y is perpendicular to the first direction X. This arrangement, on the one hand, enables the heat sink 181 to dissipate heat from the inverters 200, facilitates the connection and removal of fluid from the heat sink 181, and on the other hand, reduces the size of the heat sink 181 along the second direction Y.

[0057] In some embodiments, see Figure 4 The sealing gasket 190 includes a first sealing strip 191 that abuts against the periphery of the heat sink 181 and the bottom periphery of the box body 110, and a second sealing strip 192 located between two adjacent through grooves 115. The outer periphery of each through groove 115 is surrounded by the first sealing strip 191 and the second sealing strip 192, thereby preventing external dust and condensation from entering the two through grooves 115 from the gap between the heat sink 181 and the box body 110, thereby preventing the inverter 200 from being affected by dust and condensation.

[0058] Optionally, there are four first sealing strips 191, each of which abuts against the four side edges of the heat sink 181 and the bottom of the box body 110. There are two second sealing strips 192, each of which is spaced apart between two adjacent through-slots 115, thereby enclosing each through-slot 115.

[0059] Optionally, the sealing gasket 190 is made of rubber material, meeting the 94-V0 level, and has high performance such as insulation, waterproof and dustproof, high temperature resistance, and fire resistance, which can meet electrical performance requirements. It is understandable that in other embodiments, the sealing gasket 190 can also be made of silicone material.

[0060] In some embodiments, see Figure 5 The box body 110 is made of sheet metal. Specifically, the bottom plate 111 and four side plates 112 of the box body 110 are made of sheet metal materials, and then the bottom plate 111 and four side plates 112 of the box body 110 are welded and spliced ​​together in sequence to form the box body 110. Among them, the joints between the bottom plate 111 and the side plates 112, and between the side plates 112 are all fully welded, firmly welded, and surface treated.

[0061] In addition, a plurality of mounting holes 116 are reserved on one of the side panels 112 for mounting the input connector 130, the output connector 140, the network connector 150 and the control connector 160. At least two through slots 115 are reserved on the bottom panel 111 for the inverter 200 to pass through.

[0062] In some embodiments, see Figures 1 to 4 Mounting members 101 are provided on opposite sides of the housing 110 along the second direction Y. Mounting members 101 extend along the first direction X and are used to mount the modular housing 100 on the mounting platform. Distributing the mounting members 101 along the second direction Y prevents structural interference between the mounting members 101 and the piping of the heat sink 181. It is understood that in other embodiments, mounting members 101 may be provided on opposite sides of the housing 110 along the first direction X, avoiding the heat sink 181; alternatively, mounting members 101 may be provided on each side of the housing 110, avoiding the heat sink 181.

[0063] Optionally, opposite ends of the mounting member 101 along the first direction X are flush with opposite ends of the box body 110 along the first direction X to ensure stability and reliability of the installation.

[0064] In some embodiments, see Figure 1 The mounting member 101 includes a first bonding plate 1011 and a second bonding plate 1012 that are vertically connected. The first bonding plate 1011 is attached to the outer wall of the box body 110 and is locked to the box body 110 by screws. The second bonding plate 1012 is used to be attached to the mounting platform. A card slot 1013 is formed on the side of the second bonding plate 1012 away from the first bonding plate 1011, which is used to be connected with the card connector on the mounting platform to form the installation of the box body 110 on the mounting platform.

[0065] On the other hand, see Figures 1 to 3The present application also provides an inverter assembly, comprising at least two inverters 200 and the aforementioned combination box 100, wherein each inverter 200 is housed in the combination box 100. The inverter assembly in this embodiment, through the provision of the aforementioned combination box 100, enables multiple inverters 200 to be integrated into one combination box 100, thereby reducing the space occupied by each inverter 200 and also making the wiring of the inverter 200 more regular.

[0066] In some embodiments, see Figure 3 The inverters 200 are distributed in sequence along the first direction X, the input connector 130 and the output connectors 140 are arranged on one side of the box 110 along the second direction Y, the input connector 130 is arranged corresponding to the first inverter 200, and the output connectors 140 are arranged corresponding to each inverter 200.

[0067] In some embodiments, see Figure 3 The capacitor assembly 220 of two adjacent inverters 200 is installed between the two adjacent inverters 200. This arrangement allows the capacitor assemblies 220 of two adjacent inverters 200 to be centrally arranged, resulting in a compact layout of each inverter 200. Of course, in other embodiments, the capacitor assembly 220 may also be installed at the beginning or end of each inverter 200 along the first direction X, and this is not a limitation here.

[0068] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. Combination box, characterized in that, include: a box having a top opening and capable of accommodating at least two inverters; a cover plate, covering the top opening of the box body; An input connector is mounted on a side wall of the box, wherein the outer end of the input connector is used to be electrically connected to an external power supply, and the inner end of the input connector is used to be connected to each of the inverters; A plurality of output connectors are installed on the side wall of the box and are arranged one-to-one corresponding to each of the frequency converters. The inner ends of the output connectors are connected to the frequency converters, and the outer ends of the output connectors are used to connect to external industrial equipment.

2. The combination box according to claim 1, characterized in that: A radiator is also installed on the outer side of the bottom of the box, and the radiator extends along the distribution direction of each of the inverters.

3. The combination box according to claim 2, characterized in that: The radiator includes a heat dissipation plate which is arranged on the outside of the bottom of the box and extends along the distribution direction of the inverters. A fluid channel is arranged in the heat dissipation plate.

4. The combination box according to claim 3, characterized in that: The bottom of the box body is provided with at least two through slots for each of the frequency converters to pass through, and a sealing gasket is abutted between the heat dissipation plate and the box body.

5. The combined box according to any one of claims 1 to 4, characterized in that: The input connector and each output connector are PG connectors.

6. The combined box according to any one of claims 1 to 4, characterized in that: The side walls of the box body are respectively provided with network connectors corresponding to the inverters, and the network connectors are PG connectors; And / or, the side wall of the box body is further provided with at least one control connector, and the control connector is a PG connector.

7. The combined box according to any one of claims 1 to 4, characterized in that: The input connector and each of the output connectors are arranged on the same side of the box.

8. The combined box according to any one of claims 1 to 4, characterized in that: A sealing member is abutted between the periphery of the cover plate and the box body.

9. The inverter combination is characterized in that: The invention comprises at least two frequency converters and a combination box according to any one of claims 1 to 8, wherein each frequency converter is housed in the combination box.

10. The frequency converter assembly according to claim 9, characterized in that: The frequency converters are sequentially distributed in the box along a first direction, and the capacitor components of two adjacent frequency converters are installed between the two adjacent frequency converters.

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