Air conditioner fan speed regulation control device
Through the combination of EC fan and DDC/BMS control module, the problem of inverter increasing costs and low control accuracy in traditional air conditioning systems is solved, and low-cost and efficient air conditioning fan speed control is achieved, which is suitable for a variety of scenarios. It is the air conditioning system of large office buildings.
Patent Information
- Application Number
- CN202421112875.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In traditional air conditioning systems, although the control method of the inverter and the frequency converter axial flow fan can reduce energy consumption, it increases construction and maintenance costs, and the control accuracy is not high, which cannot meet the needs of certain specific usage scenarios.
Using EC fan, DDC control module and BMS control module, the power supply terminal of the EC fan is connected through the switch control module, and different power supply voltages are provided to realize the speed control of the fan, avoiding the use of the inverter, reducing the cost and maintenance complexity. .
It realizes the reduction of energy consumption and maintenance costs of air conditioning systems without increasing costs, provides higher control accuracy and scope of application, and is suitable for large office buildings and other scenarios, with low noise, high efficiency and strong adaptability.
Smart Images
Figure CN222352501U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air-conditioning control, in particular to a speed regulating control device for a fan of an air-conditioning. Background Art
[0002] In traditional air-conditioning systems, the control of air-conditioning fans has always been the top priority for the stable operation of the entire air-conditioning system. With the development of the times, green energy conservation and environmental protection are also regarded as important indicators of air-conditioning systems. At present, the control method of frequency converter combined with variable frequency axial flow fan is mainly used to reduce the energy consumption of air-conditioning systems. Although this system can effectively reduce the energy consumption of the system, the construction cost of the entire system is greatly increased due to the addition of frequency converters and related sensors. The subsequent maintenance also requires professionals, which greatly increases the maintenance cost compared to ordinary fan systems. In addition, the control accuracy of axial flow fans is not high; there are limitations in the use scenarios, and some specific scenarios cannot meet the use requirements. Summary of the invention
[0003] The utility model provides an air-conditioning fan speed control device to solve the problems in the prior art. The device controls the rotation of the EC fan through a DDC control module and a BMS control module to achieve the purpose of speed change without adding devices such as a frequency converter, thus avoiding an increase in cost, reducing energy consumption, and simplifying maintenance.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an air-conditioning fan speed control device, comprising an EC fan, a power supply module, a switch control module, a DDC control module and a BMS control module, wherein the power supply modules are all powered by the switch control module, the DDC control module and the BMS control module; the output ends of the DDC control module and the BMS control module are both connected to the power supply end of the EC fan through the switch control module, and the DDC control module and the BMS control module are used to provide different power supply voltages for the EC fan; the switch control module comprises a first switch unit, a second switch unit and a BMS switch, and when the first switch unit is turned on, the output end of the DDC control module is connected to the power supply end of the EC fan; when the BMS switch is closed, the first switch unit is turned off, the second switch unit is turned on, and the output end of the BMS control module is connected to the power supply end of the EC fan.
[0005] Preferably, the switch control module includes a relay AR, and the relay AR is provided with a suction end AR-1, a suction end AR-2, a suction end AR-3, a suction end AR-4 and a suction end AR-5. The first switch unit is the suction end AR-2 and the suction end AR-3 of the relay AR, and the second switch unit is the suction end AR-4 and the suction end AR-5 of the relay AR.
[0006] Preferably, the switch control module also includes a mode switching unit, and the mode switching unit includes an automatic mode and a manual mode. When the mode switching unit is in the automatic mode, the relay AR is energized and energized to enable the DDC control module or the BMS control module to work; when the mode switching unit is in the manual mode, the relay AR is de-energized, and the DDC control module and the BMS control module do not work.
[0007] Preferably, the air-conditioning fan speed control device further comprises a fault cut-off module, and when a fault occurs in the EC fan, the fault cut-off module is used to cut off the main circuit.
[0008] Preferably, the fault cut-off module includes an ETR intermediate relay, a fault signal switch and a reset switch. The absorbing end ETR-1 of the ETR intermediate relay is connected in parallel to the two ends of the fan fault signal switch, and the reset switch is connected in series with the fault signal switch. When the EC fan generates a fault signal, the fault signal switch is closed, and the ETR intermediate relay is energized and used to cut off the main circuit.
[0009] Beneficial effects of the utility model:
[0010] The utility model provides an air conditioner fan speed control device, which adopts an EC fan, and controls the rotation of the EC fan through a DDC control module and a BMS control module. The DDC control module and the BMS control module drive the rotation of the EC fan by outputting different driving voltages respectively. When the first switch unit is turned on, the output end of the DDC control module is connected to the power supply end of the EC fan; when the BMS switch is closed, the first switch unit is turned off, the second switch unit is turned on, and the output end of the BMS control module is connected to the power supply end of the EC fan. The utility model uses the EC fan to participate in the design of the air conditioning system, which can effectively save the construction cost of the system, and can complete the speed control of the EC fan without the participation of the inverter, reducing the design complexity of the control circuit and the operation and maintenance cost of the later system. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a signal block diagram of the utility model;
[0012] Figure 2 It is the circuit principle diagram of the utility model;
[0013] Figure 3 It is a circuit schematic diagram of the mode switching unit and the fault cut-off module of the utility model;
[0014] Figure 4 This is a circuit schematic diagram of the DDC control module, BMS control module and EC fan of the utility model.
[0015] exist Figures 1 to 4 Reference numerals in the drawings include:
[0016] 1-EC fan, 2-DDC control module, 3-BMS control module, 4-mode switching unit, 5-fault cut-off module. DETAILED DESCRIPTION
[0017] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.
[0018] This embodiment provides an air conditioner fan speed control device, such as Figures 1 to 4 , including EC fan 1, power supply module, switch control module, DDC control module 2 and BMS control module 3, the power supply module is all for switch control module, DDC control module 2 and BMS control module 3 power supply, that is Figures 1 to 4 The connection terminals H11 and H17 are respectively used to connect the live wire and the neutral wire, thereby achieving the purpose of power supply; the output terminals of the DDC control module 2 and the BMS control module 3 are connected to the power supply terminal of the EC fan 1 through the switch control module, and the DDC control module 2 and the BMS control module 3 are used to provide different power supply voltages for the EC fan 1; the switch control module includes a first switch unit, a second switch unit and a BMS switch. When the first switch unit is turned on, the output terminal of the DDC control module 2 is connected to the power supply terminal of the EC fan 1; when the BMS switch is closed, the first switch unit is turned off, the second switch unit is turned on, and the output terminal of the BMS control module 3 is connected to the power supply terminal of the EC fan 1.
[0019] Among them, the switch control value module includes a relay AR, and the relay AR is provided with a pull-in terminal AR-1, a pull-in terminal AR-2, a pull-in terminal AR-3, a pull-in terminal AR-4 and a pull-in terminal AR-5. The first switch unit is the pull-in terminal AR-2 and the pull-in terminal AR-3 of the relay AR, and the second switch unit is the pull-in terminal AR-4 and the pull-in terminal AR-5 of the relay AR. The specific connection principle is as follows Figures 1 to 4 As shown. Further, the present embodiment is also provided with a fault cut-off module 5, including an ETR intermediate relay, a fault signal switch FAN-1 and a reset switch RESET. The pull-in end ETR-1 of the ETR intermediate relay is connected in parallel to the two ends of the fan fault signal switch, and the reset switch is connected in series with the fault signal switch. When the EC fan 1 generates a fault signal, the fault signal switch is closed, and the ETR intermediate relay is energized and used to cut off the main circuit. Figures 1 to 4As shown, the fault signal switch FAN-1, switch T1-1 and reset switch RESET are connected in series in sequence, and then the pull-in terminal ETR-1 is connected in parallel. Figures 1 to 4 The two ends of K13 and K15 shown are used to detect and judge the signal.
[0020] Specifically, Figures 1 to 4 As shown, the main electrical circuit of this embodiment adopts a mature contactor start-up control method, and because the EC fan 1 is used, the high cost of the frequency converter can be saved, and a control effect similar to that of the prior art can be achieved, so it has higher practicality. In the control circuit part, this embodiment is provided with two major parts: local control and automatic control, wherein the automatic control is divided into two types: DDC control and BMS control. By providing a mode switching unit 4, the mode switching unit 4 is a conversion switch in the prior art, including automatic mode, manual mode and stop mode. The staff controls the gear mode of the conversion switch according to actual needs to select different control modes:
[0021] (1) Local control: The staff turns the conversion switch to the manual control mode, i.e., the local mode. At this time, the buttons of the control box body (i.e., the control box of the air conditioner or fan) are used to control the EC fan 1. The setting of the control box and the buttons is the existing technology and will not be described here. The speed regulation of the EC fan 1 uses the EC fan 1 controller to adjust the output voltage and the opening of the valve.
[0022] (2) Automatic control: The staff adjusts the switch to the automatic mode. The automatic mode includes two control modes, namely, DDC control and BMS control. The DDC control module 2 is a DDC controller, and the BMS control module 3 is a BMS controller. Both the DDC controller and the BMS controller are prior art. This embodiment mainly uses two controllers to achieve different control modes. Specifically, Figures 1 to 4 As shown, it is a specific control value principle diagram of this embodiment. When DDC control: When the automatic mode is selected, the relay AR (intermediate relay) is energized and the contacts are rotated, that is: Figures 1 to 4 In the above diagram, the pull-in terminal AR-1 is pulled in, and the pull-in terminals AR-2, AR-3, AR-4 and AR-5 are all in the upward pull-in state. At this time, the driving voltage is output through CD1 and CD2, and then the EC fan 1 is powered by the D0 and D1 terminals connected to the EC fan 1, providing different voltages, and the speed of the EC fan 1 and the opening of the valve are controlled by the DDC controller. BMS control: When the BMS switch is closed, the BMS control module 3 is turned on, such as Figures 1 to 4As shown, at this time, the suction terminal AR-1 is energized, and the suction terminals AR-2, AR-3, AR-4 and AR-5 are all in the downward suction state. The BMS control module 3 supplies power to the EC fan 1 through the BD0 and BD1 terminals, and uses the voltage regulation of the BMS controller to control the speed of the EC fan 1.
[0023] In addition, this embodiment is also provided with a fault cut-off module 5, such as Figures 1 to 4 As shown, switch T1-1 and reset switch RESET are both in the closed state. When EC fan 1 fails, the contacts of EC fan 1 output a fault signal, closing the fault signal switch FAN-1. At this time, the ETR intermediate relay is energized and energized, that is, ETR-1 and ETR-2 are energized, completing the disconnection of the main circuit and de-energizing the relay AR. Therefore, the DDC control module 2 and the BMS module both stop working, causing the EC fan 1 to stop working, thereby achieving the purpose of protecting the EC fan 1.
[0024] This embodiment uses EC fan 1 in conjunction with DDC control module 2 and BMS control module 3, which has low cost, simple control structure, easy maintenance, wide application range, and can achieve the purpose of precise speed regulation and precise control without the help of frequency converter. For example, in the air conditioning control system of some large office buildings, cost and stability are often points that must be taken into account. The use of this embodiment has incomparable advantages in terms of initial construction cost, later maintenance cost and system stability. Since EC fan 1 can complete electric stepless speed change and accurately control air volume without the participation of frequency converter, compared with the frequency converter control solution, this embodiment has certain advantages in cost, and since the control box no longer needs to be equipped with a frequency converter, the volume of the control box can also be reduced accordingly, saving the space occupied by the power room. In addition, compared with the traditional axial flow fan solution, it has the advantages of low noise, high efficiency and strong adaptability.
[0025] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.
Claims
1. An air conditioner fan speed control device, characterized in that: It includes an EC fan, a power supply module, a switch control module, a DDC control module and a BMS control module, wherein the power supply module supplies power to the switch control module, the DDC control module and the BMS control module; the output ends of the DDC control module and the BMS control module are connected to the power supply end of the EC fan through the switch control module, and the DDC control module and the BMS control module are used to provide different power supply voltages for the EC fan; the switch control module includes a first switch unit, a second switch unit and a BMS switch, and when the first switch unit is turned on, the output end of the DDC control module is connected to the power supply end of the EC fan; when the BMS switch is closed, the first switch unit is turned off, the second switch unit is turned on, and the output end of the BMS control module is connected to the power supply end of the EC fan.
2. The air conditioner fan speed control device according to claim 1, characterized in that: The switch control module includes a relay AR, which is provided with a pull-in terminal AR-1, a pull-in terminal AR-2, a pull-in terminal AR-3, a pull-in terminal AR-4 and a pull-in terminal AR-5. The first switch unit is the pull-in terminal AR-2 and the pull-in terminal AR-3 of the relay AR, and the second switch unit is the pull-in terminal AR-4 and the pull-in terminal AR-5 of the relay AR.
3. The air conditioner fan speed control device according to claim 2, characterized in that: The switch control module also includes a mode switching unit, which includes an automatic mode and a manual mode. When the mode switching unit is in the automatic mode, the relay AR is energized and energized to enable the DDC control module or the BMS control module to work; when the mode switching unit is in the manual mode, the relay AR is de-energized, and the DDC control module and the BMS control module do not work.
4. The air conditioner fan speed control device according to claim 3, characterized in that: The air conditioner fan speed control device also includes a fault cut-off module, which is used to cut off the main circuit when the EC fan fails.
5. The air conditioner fan speed control device according to claim 4, characterized in that: The fault cut-off module includes an ETR intermediate relay, a fault signal switch and a reset switch. The absorbing end ETR-1 of the ETR intermediate relay is connected in parallel to the two ends of the fan fault signal switch. The reset switch is connected in series with the fault signal switch. When the EC fan generates a fault signal, the fault signal switch is closed, and the ETR intermediate relay is energized and used to cut off the main circuit.