CN215869034U - Contact linkage switch for variable frequency control unit - Google Patents
Contact linkage switch for variable frequency control unit Download PDFInfo
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- CN215869034U CN215869034U CN202122158622.5U CN202122158622U CN215869034U CN 215869034 U CN215869034 U CN 215869034U CN 202122158622 U CN202122158622 U CN 202122158622U CN 215869034 U CN215869034 U CN 215869034U
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- variable frequency
- frequency control
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Abstract
A contact gang switch for a variable frequency control unit comprises a contact gang switch operating handle arranged on a front end cover plate of the variable frequency control unit, a connecting rod and a conductive terminal arranged in the variable frequency control unit; the connecting rod and the contact linkage switch operating handle can be in reciprocating mechanical linkage, a conducting plate is arranged on the connecting rod, a positioning piece is arranged at the rear end of the connecting rod, and the conducting plate and the conducting terminal can be electrically connected or disconnected in the mechanical linkage process of the connecting rod; meanwhile, the locking and unlocking functions in the installation and positioning of the variable frequency control unit can be realized by clamping and releasing the positioning piece. And the frequency conversion control unit can be taken out corresponding to the separation state of the positioning piece in the power-off state, so that the frequency conversion control unit can be independently disassembled and assembled under the condition that the work of other units is not influenced, and the hot plug operation is realized.
Description
Technical Field
The utility model belongs to the technical field of variable frequency control units, and particularly relates to a contact linkage switch for a variable frequency control unit.
Background
The motor frequency conversion control is a power electronic technology which changes the frequency mode of a working power supply of a motor to control the rotating speed of an alternating current motor through a frequency conversion technology and a microelectronic technology. The motor frequency conversion control device can be a universal frequency converter or a specially designed frequency conversion power unit. The motor frequency conversion control device generally comprises a rectification unit (alternating current to direct current), a filtering unit, an inversion unit (direct current to alternating current), a braking unit, a driving unit, a detection unit, a microprocessing unit and other main units. The motor frequency conversion control device adjusts the voltage and the frequency of an output power supply by switching on and off a power switch (such as an IGBT) in an internal circuit, changes the rotating speed of a motor according to the actual requirement of a motor system, and further achieves the purposes of energy conservation and speed regulation; in addition, the motor frequency conversion control device is also provided with a plurality of protection functions, such as overcurrent, overvoltage, overload protection and the like. Along with the continuous improvement of the industrial automation degree, the motor frequency conversion control device is also widely applied.
In the prior art, in order to uniformly wire, install, manage and maintain, a motor variable frequency control cabinet is generally adopted, and a plurality of frequency converter units are arranged on the motor variable frequency control cabinet, so that the motor variable frequency control cabinet can be widely applied to industries such as metallurgy, chemical engineering, petroleum, water supply, mines, building materials, motor industries and the like.
At present, in a multi-pump or fan system, a motor variable frequency control cabinet mostly adopts one or more universal frequency converters, and is fixedly installed in a standard industrial electric control cabinet to form the motor variable frequency control cabinet; the controller is realized by PLC, and is connected with each frequency converter through a special communication cable to transmit the motor rotating speed instruction and update the control parameters. However, because the mounting sizes and the mounting modes of the universal frequency converters of different manufacturers are greatly different and have no unified standard, the motor variable frequency control cabinet of a supplier needs to be designed and processed independently according to different requirements of customers, although the functions are the same, the unified standard and the process are absent in the design and assembly processes, and the control level of the product cost and the quality is low.
In addition, for a terminal user, the conventional electric control cabinet is inconvenient to maintain, the frequency converter unit is not only complicated in replacement process, but also long in time, and the power unit is difficult to maintain, replace and upgrade in an application field; in special application, the failed frequency converter unit cannot be replaced when the motor frequency conversion control cabinet is powered on and operated.
Therefore, based on the problems in the prior art, the present application designs and improves the frequency conversion control unit, especially the mechanical control mechanism therein, to achieve the standardization of the user application.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the contact linkage switch for the variable frequency control unit, which realizes the dual functions of mechanical assembly and electrical on-off by applying a plurality of groups of specially designed contact linkage switches, and has simple and convenient operation. More importantly, the frequency conversion unit designed by the method can replace the frequency conversion control unit to be maintained or failed under the condition that other motor frequency conversion units in the same cabinet are normally powered on to operate, so that hot plug installation is realized.
The utility model is solved by the following technical scheme.
A contact gang switch for a variable frequency control unit comprises a contact gang switch operating handle arranged on a front end cover plate of the variable frequency control unit, a connecting rod and a conductive terminal arranged in the variable frequency control unit; the connecting rod is linked with the contact linkage switch operating handle, a conducting strip is arranged on the connecting rod, a positioning piece is arranged at the rear end of the connecting rod, and the conducting strip and the conducting terminal can be connected or disconnected in the motion process of the connecting rod; meanwhile, the locking and unlocking functions in the installation and positioning of the variable frequency control unit can be realized by clamping and releasing the positioning piece.
The multi-group contact linkage switch adopts a mechanical linkage structure, and drives a plurality of groups of electric conducting plates to do mechanical reciprocating movement through the parallel reciprocating displacement or the rotary reciprocating displacement of the movable connecting rod, so that each group of conducting plates respectively corresponds to two states of clamping and separating of the conducting plates according to two preset different positions, the connecting rod and the operating handle are in mechanical linkage to generate displacement, and the electric connection or disconnection of the conducting plates and the corresponding pair of conductive terminals is realized.
The multi-group contact linkage switch in the application adopts a mechanical linkage structure, and parallel reciprocating displacement or rotary reciprocating displacement of the movable connecting rod drives the clamping and releasing of the positioning piece, so that the functions of installation positioning, locking and unlocking of the variable frequency control unit and indication of the installation state are realized.
In a preferred embodiment, the multi-group contact linkage switch can be provided with a rotary operation reciprocating connecting rod, a panel operation handle, a plurality of groups of conducting strips and contacts, a positioning piece and the like. The panel operating handle has only two working positions: a horizontal position and a vertical position. When the panel operating handle is in a horizontal position, each group of conducting strips is in a state of being separated from the corresponding contact; when the panel operating handle is at a vertical position, each group of conducting strips is in a state of being clamped into the corresponding contact. Before the frequency conversion control unit is installed, the panel operating handle is in a horizontal position, namely an unlocking state. Rotating the panel operation handle clockwise by 90 degrees, linking the handle with the connecting rod to rotate clockwise by 90 degrees, fixing the multiple groups of conducting strips on the connecting rod, and rotating clockwise by 90 degrees together with the operation handle to realize the electrical connection between each group of conducting strips and the corresponding pair of conductive terminals; after the frequency conversion control unit is installed, the panel operating handle is in a vertical position, namely, a locking state, the panel operating handle rotates anticlockwise for 90 degrees, the handle linkage connecting rod rotates anticlockwise for 90 degrees, the multiple groups of conducting strips are fixed on the connecting rod and rotate anticlockwise for 90 degrees together with the operating handle, electrical disconnection between each group of conducting strips and a corresponding pair of conducting terminals is achieved, unlocking is achieved simultaneously, and the frequency conversion control unit can be taken out.
In a preferred embodiment, the panel operating handle drives the reciprocating connecting rod, and the positioning piece is fixed on the reciprocating connecting rod and rotates in a linkage manner with the reciprocating connecting rod. When the panel operating handle is in a horizontal position, the variable frequency control unit is in an unlocking state and can be installed or detached; when the panel operating handle is in a vertical position, the variable frequency control unit is in a locking state and can be powered on and operated. When the panel operating handle is in a horizontal position, the positioning piece is in a free moving state. Rotating the panel operating handle clockwise by 90 degrees, rotating the handle linkage connecting rod clockwise by 90 degrees, rotating the positioning piece together with the operating handle clockwise by 90 degrees, screwing the positioning piece and the operating handle into a mechanical fixing and locking station, and finishing the installation process of the variable frequency control unit; the panel operating handle is rotated anticlockwise by 90 degrees, the handle linkage connecting rod rotates anticlockwise by 90 degrees, the positioning piece rotates anticlockwise by 90 degrees together with the operating handle, the mechanical fixing and locking station is screwed out, then the variable frequency control unit is taken out, and the taking-out process is finished. The installation and the taking-out of the variable frequency control unit correspond to the dropping-out state of the positioning piece in the power-off state, and the variable frequency control unit can be independently disassembled and assembled under the condition that the work of other units is not influenced, so that the hot plug operation is realized; the variable frequency control unit can not be pulled out at the moment corresponding to the clamping state of the positioning piece in the power-on state, and the safety is high.
In a preferred embodiment, one end of the connecting rod passes through the shell and then is fixed on the contact linkage switch operating handle on the outer side, and the other end of the connecting rod passes through the assembly plate and is provided with a positioning piece; the shell is provided with a through hole for the positioning piece to penetrate out, and the mounting position is provided with a clamping groove for the positioning piece to be inserted into. In the structure, the positioning and supporting stability of the connecting rod is high, the rotating operation is convenient, and the structure is compact.
In a preferred embodiment, the connecting rod is provided with six conductive plates, and the conductive terminal includes three groups of incoming terminals and three groups of outgoing terminals, which correspond to the conductive plates one to one, and correspond to the three-phase power input connection line and the three-phase motor output connection line, respectively.
In a preferred embodiment, the conductive terminals are disposed at the upper and lower sides or the left and right sides of the rotation position of the conductive sheets, and three conductive sheets are connected in a group through the substrate.
In a preferred embodiment, a card is disposed on one side of each conductive terminal, and a groove for the conductive sheet to enter is formed between the conductive terminal and the card, so that more stable conductive contact is realized.
Compared with the prior art, the utility model has the following beneficial effects: the contact linkage switch for the variable frequency control unit is convenient to operate, and can realize the normal electrification of the variable frequency control cabinet of the motor and the installation and the disassembly of the variable frequency control unit under the operating condition.
Drawings
Fig. 1 is a perspective view of a variable frequency control cabinet of a motor in an embodiment of the utility model.
Fig. 2 is a perspective view of a variable frequency control cabinet of a motor according to another embodiment of the present invention.
Fig. 3 is a perspective view of the motor variable frequency control cabinet with a part of the installation positions being free.
Fig. 4 is a perspective view of the variable frequency control unit in the present invention.
Fig. 5 is an internal schematic diagram of the variable frequency control unit of the present invention.
Fig. 6 is a sectional view of the variable frequency control unit of the present invention installed in an installation site.
Fig. 7 is a first schematic diagram of an assembly structure of the variable frequency control unit and the mounting position.
Fig. 8 is a schematic diagram of an assembly structure of the variable frequency control unit and the mounting position.
Fig. 9 is a schematic view of the conductive sheet structure in the energized state.
FIG. 10 is a schematic view of a conductive sheet structure in a power-off state.
Fig. 11 is an enlarged schematic view of a conductive sheet and a conductive terminal according to an embodiment.
Fig. 12 is an enlarged schematic view of a conductive sheet and a conductive terminal according to another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The embodiments described below by referring to the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, are exemplary only for explaining the present invention, and are not construed as limiting the present invention.
In describing the present invention, it is to be understood that the terms: the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, and thus, should not be construed as limiting the present invention. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In describing the present invention, unless otherwise expressly specified or limited, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.
Referring to fig. 1 to 12, the modularly assembled motor variable frequency control cabinet related to the present application includes a cabinet body 5, where the cabinet body 5 is provided with a plurality of regularly arranged mounting positions 55 for mounting the variable frequency control unit 1; the cabinet body 5 is provided with a system controller 51, the system controller 51 is provided with second wiring ports 53 which are in one-to-one correspondence with the wiring ports 13 on the variable frequency control unit 1, the second wiring ports and the second wiring ports are connected through a pluggable flat cable or a cable, and the system controller 51 can control the variable frequency control unit 1 after connection; the variable frequency control unit 1 comprises a shell matched with the installation position 55 in size, and a wiring port 13, an air switch 11 and a contact linkage switch operating handle 14 are arranged on a front panel of the variable frequency control unit 1; the power unit 2, the connecting rod 141 and the conductive terminal 32 are arranged in the variable frequency control unit 1; the connecting rod 141 is linked with the contact linkage switch operating handle 14, the connecting rod 141 is provided with a conducting plate 31, and the conducting plate 31 can be a copper plate or an aluminum plate and has enough rigidity or strength. The rear end of the connecting rod 141 is provided with a positioning piece 142, and the connecting rod 141 can drive the conducting strip 31 and the conducting terminal 32 to be connected or disconnected in the rotating process, and can also drive the positioning piece 142 to be clamped and released; the wiring port 13 is connected to a corresponding socket of the power unit 2 through a bus bar or a cable 136, and the power unit 2, the air switch 11 and the conductive terminal 32 are electrically connected.
Specifically, as can be seen from fig. 1 to 3, in the present application, the cabinet 5 is provided with a terminal strip 52 for input and output, generally in the lower section of the cabinet, the terminal strip 52 is provided with a main air switch 521 and a contactor 522, which are connected in parallel to each mounting position 55, and provide power for the variable frequency control unit 1 through the contacts. In addition, a plurality of installation positions 55 on the cabinet body 5 are arranged in an upper row and a lower row, the system controller 51 is arranged between the upper row and the lower row of installation positions 55, the structure is compact, the connection operation of the wiring ports 13 on the variable frequency control units 1 on the upper row and the lower row of installation positions 55 and the second wiring ports 53 is facilitated, and 1-4 installation positions 55 are arranged in each row. A slide rail structure can be arranged in the mounting position 55, so that the variable frequency control unit 1 can be conveniently pushed and pulled out.
Specifically, as can be seen from fig. 4 to 7, in the present application, an installation handle 12 is arranged on the outer side surface of the variable frequency control unit 1, which is convenient for carrying and installation and disassembly. The frequency conversion control unit 1 is provided with a fan 15 which can be higher than the power unit 2 for heat dissipation, and correspondingly, a heat dissipation vent 155 is further provided to effectively assist the power unit 2 in heat dissipation.
The frequency conversion control unit 1 is provided with an assembly plate 21, the power unit 2 is mounted on the assembly plate 21, specifically, the assembly plate 21 is vertically arranged, the power unit 2 is vertically mounted on the assembly plate 21, and the power input and output of the power unit are respectively connected with a power supply grid and a driven motor through a conducting plate 31 and a conducting terminal 32 on a connecting rod 141.
One end of the connecting rod 141 passes through the shell and then is fixed on the contact linkage switch operating handle 14 at the outer side, and the other end passes through the assembly plate 21 and is provided with a positioning piece 142; the casing is provided with a through hole for the positioning element 142 to penetrate out, the mounting position 55 is provided with a clamping groove 411 for the positioning element 142 to be inserted into the bottom plate 41, the positioning element 142 can enter the clamping groove 411 to realize locking, the frequency conversion control unit 1 is prevented from sliding out of the mounting position 55, and the positioning element 142 can be one or more. In this structure, the positioning and supporting stability of the connecting rod 141, the rotating operation is convenient, and the structure is compact.
In this application, six conducting strips 31 are installed on the connecting rod 141, the conductive terminal 32 includes three groups of incoming line terminals and three groups of outgoing line terminals, respectively with conducting strip 31 one-to-one, respectively correspond three-phase power input line and three-phase motor output line. The conductive terminals 32 are disposed on the upper and lower sides or the left and right sides of the rotation position of the conductive plate 31. Each group of the conductive terminals 32 has two poles, one pole is located on the insulating substrate 321 in the frequency conversion control unit 1, the other pole is located on the insulating substrate 321 on the corresponding substrate support of the mounting position 55, and the conductive sheet 31 can be communicated with each group of the conductive terminals 32 through mechanical displacement.
Specifically, the conductive terminals 32 in the above structure can be connected to the three-phase or single-phase power input terminals of the motor variable frequency control cabinet; when the frequency conversion control unit 1 needs to be replaced under the condition that the input power supply is switched on, the power unit 2 in the frequency conversion control unit 1 can be electrically connected with the conductive terminals 32 through a three-phase or single-phase air circuit breaker; first, the circuit breaker is opened, and then the conductive terminal 32 is opened by operating the handle 14, thereby cutting off the power supply of the inverter control unit 1. In this embodiment, the conductive terminals 32 have two sets, one set is installed in the variable frequency control unit 1, the other set is installed in the bottom plate 41, and after the variable frequency control unit 1 is installed in the installation position 55, the connecting rod 141 is rotated to drive the conductive sheet 31 thereon to electrically communicate with the two sets of conductive terminals 32.
Fig. 7 to 12 are schematic views of the conductive structure on the connecting rod 141. The conductive terminal 32 is disposed on the upper and lower sides, and when the variable frequency control unit 1 is inserted into the mounting position 55, the connection domain can be disconnected by rotating the contact in conjunction with the switch operating handle 14. The contact gang switch operating handle 14 is a strip-shaped hand-held piece, when the contact gang switch operating handle 14 rotates to a vertical state, the conducting strip 31 on the connecting rod 141 is attached to the conducting terminal 32 to realize conduction, and when the contact gang switch operating handle 14 rotates to a horizontal state, the contact gang switch operating handle and the conducting terminal are separated to be in a power-off state. Fig. 11 is a schematic view of a conductive structure according to an embodiment, and fig. 12 is a schematic view of a conductive structure according to another embodiment, in which a card 323 is disposed on one side of each conductive terminal 32, and a groove is formed between the conductive terminal 32 and the card 323 for the conductive sheet 31 to enter, so as to achieve more stable conductive contact.
In this application, frequency conversion control unit 1's casing has front end cover board, rear end cover board, roof and controls the curb plate, in the actual assembling process, can be according to mounted position, saves curb plate and roof about, also is favorable to the heat dissipation. Further, the status signal of the fan 15 for cooling can be connected to the system controller for monitoring and alarming, and the variable frequency control unit 1 can also be provided with a temperature sensor for monitoring temperature and alarming.
Above description can be seen that, the motor variable frequency control cabinet in this application has adopted the modularization extensible structure, specifically embodies: the cabinet body 5 has a uniform and general structure of the mounting positions 55, the matched mounting variable frequency control units 1 can be rapidly mounted and dismounted, and a certain number of mounting variable frequency control units 1 can be assembled on the cabinet body 5 as required to realize modular mounting; the installation variable frequency control unit 1 is matched with the installation position 55, is uniform in size and shape, is a modular unit, and realizes modular installation.
In addition, in the rotation process of the connecting rod 141 in the present application, the conducting plate 31 and the conducting terminal 32 can be connected or disconnected to function as an electrical isolating switch, and the positioning member 142 can be clamped and released to function as a mechanical locking and unlocking function of the frequency conversion control unit 1. In the power-off state, the frequency conversion control unit 1 can be taken out corresponding to the out-of-position state of the positioning member 142, that is, the frequency conversion control unit 1 in the power-off state can be taken out under the condition that other frequency conversion control units 1 are powered on to work, so that the hot plug operation is realized. The corresponding positioning element 142 is clamped in a locking state in the power-on state, and the variable frequency control unit 1 cannot be pulled out at the moment, so that the safety is high.
Furthermore, in the present application, voltage and current sensors may be installed in the power supply line, and then voltage and current detection signals are connected to the system controller circuit board through a measurement cable, so as to implement the monitoring of the voltage, current and total input power of the power supply network. The connection cable between the frequency conversion control unit 1 and the system controller 51 may have a connection state recognition function, and when the connection cable is disconnected from the frequency conversion control unit 1, the system controller may detect the disconnection state, may selectively implement bypassing of the frequency conversion control unit, and drive the corresponding motor power frequency to operate through a dedicated contactor.
Specifically, motor frequency conversion switch board in this application has following beneficial effect: 1) the frequency conversion control unit realizes modular design and processing, and is easy to reduce cost and control quality; 2) the power unit in the frequency conversion control unit can select a universal frequency converter, and the universal frequency converters of different manufacturers and performances can be flexibly selected according to the requirements of customers, but the standardization of product design and maintenance can still be kept; 3) the maintenance of the motor variable frequency control cabinet is very convenient, and maintenance personnel can be on duty only by simple training without mastering the maintenance skill of a power unit in a complex variable frequency control unit or knowing an instruction manual of universal frequency converter products of different manufacturers; 4) in an application field, the frequency conversion control unit is short in replacement time (within 10 minutes for example), so that the shutdown and overhaul time of a client is greatly reduced; 5) the upgrading and the reconstruction of the frequency conversion control unit and the interchange and the replacement of universal frequency converter products of different manufacturers are easy to realize.
The utility model provides a motor variable frequency control cabinet assembled in a modularized way, which unifies the size and the assembly mode of each variable frequency control unit and adopts a modularized installation mode; meanwhile, a plurality of groups of contact linkage switches are adopted for electrical on-off and isolation, the operation is convenient, and the hot plug installation and the disassembly of the working condition down-conversion control unit of the motor variable frequency control cabinet in the power-on operation can be realized.
The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.
Claims (7)
1. A contact linkage switch for a variable frequency control unit is characterized by comprising a contact linkage switch operating handle (14) arranged on a front end cover plate of the variable frequency control unit (1), a connecting rod (141) arranged in the variable frequency control unit (1) and a conductive terminal (32);
the connecting rod (141) is linked with the contact linkage switch operating handle (14), a conducting plate (31) is arranged on the connecting rod (141), a positioning piece (142) is arranged at the rear end of the connecting rod (141), the conducting plate (31) and the conducting terminal (32) can be connected or disconnected in the moving process of the connecting rod (141), and the positioning piece (142) can be clamped in and separated from the conducting plate.
2. The contact linkage switch for the variable frequency control unit according to claim 1, wherein the connecting rod (141) is rotatable, and the conductive sheet (31) and the conductive terminal (32) can be connected or disconnected in the rotating process, and the positioning member (142) can be clamped and released.
3. A switch in accordance with claim 1, wherein the connecting rod (141) is movable to connect or disconnect the conducting strip (31) and the conducting terminal (32) and to engage or disengage the positioning element (142) during movement.
4. The contact gang switch for the variable frequency control unit according to claim 1, characterized in that one end of the connecting rod (141) passes through the shell of the variable frequency control unit (1) and then is fixed on the contact gang switch operating handle (14) at the outside, and the other end passes through the assembly plate (21) and is provided with a positioning piece (142); the shell is provided with a through hole for the positioning piece (142) to penetrate out.
5. A contact ganged switch for a variable frequency control unit according to claim 1, wherein the connecting rod (141) is provided with six conducting strips (31), and the conducting terminals (32) comprise three groups of incoming terminals and three groups of outgoing terminals, which are in one-to-one correspondence with the conducting strips (31).
6. A contact ganged switch for a variable frequency control unit according to claim 3, wherein the conducting terminals (32) are disposed on the upper and lower sides or the left and right sides of the rotating position of the conducting strips (31), and three conducting strips (31) are connected in a group through the substrate (321).
7. A contact ganged switch for a variable frequency control unit according to claim 3, wherein each conducting terminal (32) is provided with a card (323) on one side, and a groove for the conducting strip (31) to enter is arranged between the conducting terminal (32) and the card (323).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122158622.5U CN215869034U (en) | 2021-09-08 | 2021-09-08 | Contact linkage switch for variable frequency control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122158622.5U CN215869034U (en) | 2021-09-08 | 2021-09-08 | Contact linkage switch for variable frequency control unit |
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| Publication Number | Publication Date |
|---|---|
| CN215869034U true CN215869034U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122158622.5U Active CN215869034U (en) | 2021-09-08 | 2021-09-08 | Contact linkage switch for variable frequency control unit |
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| CN (1) | CN215869034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113783109A (en) * | 2021-09-08 | 2021-12-10 | 宁波九荣环保科技有限公司 | Motor variable frequency control cabinet of modularization assembly |
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2021
- 2021-09-08 CN CN202122158622.5U patent/CN215869034U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113783109A (en) * | 2021-09-08 | 2021-12-10 | 宁波九荣环保科技有限公司 | Motor variable frequency control cabinet of modularization assembly |
| CN113783109B (en) * | 2021-09-08 | 2024-05-24 | 宁波九荣环保科技有限公司 | Motor variable frequency control cabinet assembled in modularized mode |
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Denomination of utility model: A Contact Linkage Switch for Variable Frequency Control Units Effective date of registration: 20230825 Granted publication date: 20220218 Pledgee: Ningbo Zhenhai Rural Commercial Bank Co.,Ltd. Pledgor: NINGBO JIURONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023980053821 |