CN216159289U - EC fan control system - Google Patents
EC fan control system Download PDFInfo
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- CN216159289U CN216159289U CN202121563563.3U CN202121563563U CN216159289U CN 216159289 U CN216159289 U CN 216159289U CN 202121563563 U CN202121563563 U CN 202121563563U CN 216159289 U CN216159289 U CN 216159289U
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Abstract
The utility model provides an EC fan control system, which comprises a main controller and an EC fan control module, wherein the EC fan control module comprises a plurality of control circuits capable of respectively receiving control instructions, the main controller comprises a main control unit for controlling the rotating speed of an EC fan and a receiving unit for regularly receiving feedback information of the EC fan and feeding back whether the feedback information is successfully received to the main control unit, and the main control unit controls the circuit switching of the EC fan control module according to the feedback information received by the receiving unit so as to receive the control instructions. According to the EC fan control system provided by the utility model, when the EC fan is controlled to work, under the condition that the current communication fails, the main control unit is automatically switched to other control circuits through the dial switch to control the EC fan to operate, so that the problem of economic loss caused by untimely heat dissipation of a use space due to the fact that the EC fan stops operating due to communication interruption is solved.
Description
Technical Field
The utility model relates to the technical field of fan control, in particular to an EC fan control system.
Background
At present, the communication machine room has the phenomena of dense equipment, unbalanced local heating of the equipment, large heating quantity and the like, so that a precise inter-row air conditioner needs to continuously run for 24 hours to keep a good running environment for cabinet equipment, in order to meet the requirements of miniaturization, large cooling capacity, energy conservation, high efficiency and uninterrupted work of the air conditioner, more and more precise inter-row air conditioners adopt an EC fan as an air conditioner outdoor unit, the EC fan is controlled to communicate with an intermediate controller through a main controller detection sensor at present, and then an EC fan module is controlled by the EC fan module, the process is RS485 communication, once the RS485 communication is interrupted, the EC fan module cannot run according to the latest instruction of the intermediate controller, and the refrigeration effect cannot be guaranteed.
Therefore, how to improve the above disadvantages and shortcomings to better meet the needs of usage is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to solve the problems and the defects and provides an EC fan control system which can automatically switch an EC fan control mode and ensure that an EC fan can continuously operate in various scenes.
In order to achieve the purpose, the utility model provides an EC fan control system, which adopts the technical scheme that:
the EC fan control system comprises a main controller and an EC fan control module, wherein the EC fan control module comprises a plurality of control circuits capable of respectively receiving control instructions, the main controller comprises a main control unit for controlling the rotating speed of the EC fan and a receiving unit for regularly receiving feedback information of the EC fan and feeding back whether the feedback information is successfully received to the main control unit, and the main control unit controls the circuits of the EC fan control module to be switched to receive the control instructions according to the feedback information received by the receiving unit.
Further, the control circuit comprises but is not limited to an RS485 circuit and/or a 0-10V analog quantity circuit for outputting the drive voltage of the EC fan and/or a 4-20mA analog quantity circuit for outputting the drive current of the EC fan, and the main control unit controls the switching of the control circuit through a dial switch.
Further, the EC fan includes a plurality of ports capable of receiving control signals, and the ports are respectively connected to the control circuits.
Further, the EC fan preferably adopts the RS485 circuit to communicate with the EC fan control module.
Further, the EC fan control module also comprises a PWM digital value circuit used for controlling the 0-10V analog value circuit to output a target voltage.
And the signal output ends of the pressure acquisition circuit and the temperature acquisition circuit are connected with the signal input end of the main control unit, and the acquired pressure and temperature information is sent to the main control unit.
Further, the main controller also comprises a storage unit for storing the acquired pressure data and temperature data, the storage unit prestores a comparison relation table of a pressure/temperature data range and the rotation speed of the EC fan and a corresponding relation table of the rotation speed of the EC fan and the driving voltage/driving current, and the main control unit controls the rotation speed of the EC fan according to the real-time acquired pressure data and/or temperature data and the corresponding comparison relation table.
Further, the EC fan control modules are one or more groups, each control circuit of each EC fan control module is connected to a corresponding port of the EC fan, or the EC fan control modules are connected to a plurality of EC fans at the same time, and the rotation speed of the EC fans is controlled by the main controller.
Furthermore, the device also comprises a power supply module which supplies power to the 0-10V analog quantity circuit and the 4-20mA analog quantity circuit.
In summary, compared with the prior art, when the EC fan is controlled to work, the EC fan preferentially performs bidirectional communication with the main controller through the RS485 circuit, if the main controller does not receive feedback information of the EC fan after a preset time interval, or the EC fan does not receive an instruction sent by the main controller, the two default communication fails, and the main control unit automatically switches to the 0-10V analog circuit or the 4-20mA analog circuit through the dial switch to output a driving voltage or a driving current corresponding to a currently required rotating speed to control the operation of the EC fan, so that the problem that the EC fan stops operating due to communication interruption is solved, and economic loss caused by insufficient heat dissipation in a use space is avoided; in addition, the EC fan control modules of the EC fan control system provided by the utility model are one or more groups, can be used for controlling one or more groups of EC fans, are convenient and simple to use, save the cost, and are provided with other circuits, so that the expansibility of the EC fan control system is enhanced.
Description of the drawings:
FIG. 1: the utility model relates to a control schematic block diagram of an EC fan control system;
the system comprises an EC fan 1, a control module 2, a main controller 3, a power module 4, a pressure acquisition circuit 5 and a temperature acquisition circuit 6.
Detailed Description
The utility model is described in further detail below with reference to the following figures and detailed description.
The present embodiment describes the present invention in detail in a usage scenario where the EC fan controller comprises a set of EC fan control modules, but the present invention is not limited in any way, and any modification or improvement based on the teaching of the present invention is within the protection scope of the present invention.
The utility model provides an EC fan control system, which comprises a main controller 3 and an EC fan control module 2, wherein the EC fan control module 2 comprises a plurality of control circuits capable of respectively receiving control instructions, the main controller 3 comprises a main control unit for controlling the rotating speed of an EC fan and a receiving unit for regularly receiving feedback information of the EC fan 1 and feeding back whether the feedback information is successfully received to the main control unit, and the main control unit controls the circuit of the EC fan control module 2 to be switched to receive the control instructions according to the feedback information received by the receiving unit.
The EC fan control system provided in this embodiment includes a main controller 3, an EC fan control module 2, a power module 4, a pressure acquisition circuit 5, and a temperature acquisition circuit 6, where the EC fan control module 2 includes but is not limited to one or a combination of an RS485 circuit, a 0-10V analog circuit, a 4-20mA analog circuit, a PWM digital circuit, and other circuits that can communicate with the EC fan 1 and transmit control instructions, the main controller 3 includes a main control unit, a receiving unit, and a storage unit, the EC fan 1 is provided with a plurality of interfaces, and a signal (each control circuit) output end of the EC fan control module 2 is connected to a signal input end of a corresponding interface of the EC fan 1, respectively, for receiving the control instructions. The PWM digital quantity circuit is used for controlling the 0-10V analog quantity circuit to output a target voltage. In this embodiment, the control system preferentially adopts the RS485 circuit to communicate with the EC fan, that is, the control instruction of the main controller 3 is preferentially transmitted to the EC fan 1 through the RS485 circuit to control the rotation speed of the EC fan 1.
The main control unit is used for sending a rotating speed instruction to the EC fan 1 and controlling the switching of a control circuit of the EC fan control module 2, so as to be connected with the EC fan 1 through different control circuits to control the rotating speed of the EC fan 1, the receiving unit is used for receiving or detecting the real-time operating state fed back by the EC fan and comparing the real-time operating state with the control information sent by the main control unit to form feedback information to be output to the main control unit at regular time, or the receiving unit is used for receiving the real-time operating state information fed back by the EC fan 1 through the original control circuit and outputting the result of whether the feedback information is successfully received or not to the main control unit at regular time after a preset time interval, if the real-time operating state of the EC fan 1 received by the receiving unit does not accord with the control instruction sent by the main control unit or the receiving unit fails to receive the corresponding feedback information within the set time, the failure of the existing control circuit/communication mode is shown, the control instruction of the main control unit cannot be accurately transmitted to the EC fan through the current control circuit of the EC fan control module 2, the communication with the EC fan fails currently, the main control unit controls the EC fan control module 2 to switch the control circuit, the connection between the current control circuit and the EC fan 1 is cut off, the current control circuit is switched to any other control circuit to be connected with the EC fan 1, and the operation of the EC fan 1 is controlled, so that the situation that the currently adopted communication fails is guaranteed, the connection between the other control circuits and the port of the EC fan 1 is adopted, and the operation of the EC fan 1 is effectively controlled. For example, when the communication between the RS485 circuit preferentially adopted and the EC fan 1 fails, the main control unit automatically switches to the 0-10V analog quantity circuit or the 4-20mA analog quantity circuit through the dial switch to control the running of the EC fan 1. The 0-10V analog quantity circuit or the 4-20mA analog quantity circuit can output corresponding driving voltage or driving current to control the operation of the EC fan. The main controller comprises a storage unit, a comparison relation table of a pressure/temperature range and the rotating speed of the EC fan and a corresponding relation table of the rotating speed of the EC fan and driving voltage/driving current of the EC fan, a temperature detection acquisition circuit 6 and a pressure acquisition circuit 5 acquire real-time temperature data and pressure data in a ventilation space, transmit the real-time temperature data and the pressure data to the main controller, store the real-time temperature data and the pressure data in the storage unit, determine the rotating speed of the EC fan 1 by comparing the real-time temperature data and the pressure data with the pre-stored comparison relation table of the pressure/temperature range and the rotating speed of the EC fan, and determine the current value or the voltage value output by the 0-10V analog quantity circuit or the 4-20mA analog quantity circuit according to the corresponding relation table of the driving voltage/driving current. When the 0-10V analog quantity circuit or the 4-20mA analog quantity circuit is used for controlling the running of the EC fan 1, the power supply module 4 provides control power supply.
In an initial working state, an RS485 circuit is preferentially adopted between an EC fan control module 2 and an EC fan 1 for bidirectional communication, the EC fan 1 feeds back the working state information of the EC fan 1 to a receiving unit at regular time according to a preset time interval, if the working state information is fed back normally after the preset time interval, a main control unit selects the corresponding EC fan rotating speed in a comparison relation table of a pressure/temperature range and the EC fan rotating speed according to the real-time data of the outdoor system pressure and temperature data stored by a storage unit for the last time, and sends a corresponding rotating speed instruction to the EC fan through the RS485 circuit; if the receiving unit does not receive the feedback information of the EC fan after a preset time interval or the EC fan does not receive an instruction sent by the main control unit, the communication between the default EC fan controller and the EC fan fails, the receiving unit outputs the information to the main control unit, the main control unit firstly selects the corresponding rotating speed in a comparison relation table of the pressure/temperature range and the rotating speed of the EC fan according to the real-time data of the pressure and temperature data of the outdoor system stored by the storage unit for the last time, then automatically selects and switches a 0-10V analog quantity circuit or a 4-20mA analog quantity circuit to be connected with and communicated with the EC fan 1 according to a preset program, selects the driving voltage or driving current corresponding to the currently required rotating speed according to the corresponding relation table of the rotating speed of the EC fan and the driving voltage/driving current, outputs the driving voltage or driving current to the EC fan 1, and controls the rotating speed of the EC fan 1, the EC fan 1 is ensured not to stop due to the communication interruption with the EC fan control module 2, so that the refrigeration effect of the use space is ensured. By analogy, the main control unit controls different control circuits to be connected with different terminals of the EC fan 1 according to whether the main control unit can receive the feedback information of the EC fan 1, so as to ensure that the EC fan can realize a control mode of multi-end output, and when any control circuit fails, the control circuits are mutually switched under the action of the main control unit, so as to ensure the normal work of the EC fan 1. Further, an RS485 circuit in the EC fan control module 2 has a self-reset function, when RS485 communication fails and other control circuits are switched to control the EC fan 1, the RS485 circuit starts the self-reset function, the communication function is automatically repaired, a receiving unit receives feedback information of the RS485 circuit at regular time, when the receiving unit can normally receive working state information fed back by the EC fan 1 through the RS485 circuit, the RS485 circuit is successfully repaired and can carry out effective communication, the main control unit automatically switches back to the RS485 circuit through a dial switch, and sends rotating speed information of the EC fan 1 corresponding to real-time pressure and temperature data of an outdoor system stored by the storage unit last time to the EC fan 1 to control the running of the EC fan 1, and interaction between the EC fan 1 and the EC fan control module 2 in a normal working state is guaranteed.
The EC fan control modules 2 may be one or more groups, when there are multiple groups of EC fan control modules 2, the input end of each EC fan control module 2 is connected to the main controller, and each output end (each control circuit) is connected to the corresponding port of the EC fan 1, and a plurality of ports are connected to each port of the EC fan 1 to control the working states such as the rotation speed of the EC fan according to the aforementioned mode, or the EC fan control modules 2 are connected to a plurality of EC fans 1 at the same time, and the rotation speed of the EC fan is controlled by the main controller 3. The method can be used for controlling one or more groups of EC fans, and can meet the control on the EC fans under different use scenes.
It should be noted that: the EC fan control system provided in this embodiment may be widely applied to various scenarios for controlling the rotation speed of the EC fan, and the specific embodiment described herein is only used to explain the present invention, and is not used to limit the present invention.
In summary, compared with the prior art, when the EC fan is controlled to work, the EC fan is in bidirectional communication with the main controller through the RS485 circuit, if the main controller does not receive feedback information of the EC fan after a preset time interval, or the EC fan does not receive an instruction sent by the main controller, the two default communications fail, and the main control unit automatically switches to the 0-10V analog circuit or the 4-20mA analog circuit through the dial switch to output a driving voltage or a driving current corresponding to the currently required rotating speed to control the operation of the EC fan, so that the problem of economic loss caused by insufficient heat dissipation in a use space due to communication interruption is solved; in addition, the EC fan control modules of the EC fan control system provided by the utility model are one or more groups, can be used for controlling one or more groups of EC fans, are convenient and simple to use, save the cost, and are provided with other circuits, so that the expansibility of the EC fan control system is enhanced.
Similar solutions can be derived as described above in connection with the given solution content. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides an EC fan control system which characterized in that: the EC fan control module comprises a plurality of control circuits capable of respectively receiving control instructions, the main controller comprises a main control unit for controlling the rotating speed of the EC fan and a receiving unit for regularly receiving feedback information of the EC fan and feeding back whether the feedback information is successfully received to the main control unit, and the main control unit controls the circuits of the EC fan control module to be switched to receive the control instructions according to the feedback information received by the receiving unit.
2. The EC fan control system of claim 1, wherein: the control circuit comprises but is not limited to an RS485 circuit and/or a 0-10V analog quantity circuit for outputting the drive voltage of the EC fan and/or a 4-20mA analog quantity circuit for outputting the drive current of the EC fan, and the main control unit controls the switching of the control circuit through a dial switch.
3. The EC fan control system of claim 2, wherein: the EC fan comprises a plurality of ports capable of receiving control signals, and the ports are respectively connected with the control circuits.
4. The EC fan control system of claim 2, wherein: the EC fan preferentially adopts the RS485 circuit to communicate with the EC fan control module.
5. The EC fan control system of claim 2, wherein: the power supply module is used for supplying power to the 0-10V analog quantity circuit and the 4-20mA analog quantity circuit.
6. The EC fan control system of claim 2, wherein: the EC fan control module also comprises a PWM digital value circuit used for controlling the 0-10V analog value circuit to output a target voltage.
7. The EC fan control system of claim 2, wherein: the temperature acquisition circuit is connected with the signal input end of the main control unit, and sends acquired pressure and temperature information to the main control unit.
8. The EC fan control system of claim 7, wherein: the main controller also comprises a storage unit for storing the acquired pressure data and temperature data, the storage unit prestores a comparison relation table of a pressure/temperature data range and the rotating speed of the EC fan and a corresponding relation table of the rotating speed of the EC fan and driving voltage/driving current, and the main control unit controls the rotating speed of the EC fan according to the real-time acquired pressure data and/or temperature data and the corresponding comparison relation table.
9. The EC fan control system of claim 1, wherein: the EC fan control modules are one or more groups, each control circuit of each EC fan control module is respectively connected with a corresponding port of the EC fan, or the EC fan control modules are simultaneously connected with a plurality of EC fans, and the rotation speed of the EC fans is controlled by the main controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121563563.3U CN216159289U (en) | 2021-07-10 | 2021-07-10 | EC fan control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121563563.3U CN216159289U (en) | 2021-07-10 | 2021-07-10 | EC fan control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216159289U true CN216159289U (en) | 2022-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121563563.3U Active CN216159289U (en) | 2021-07-10 | 2021-07-10 | EC fan control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216159289U (en) |
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2021
- 2021-07-10 CN CN202121563563.3U patent/CN216159289U/en active Active
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