CN111219351A - Fan rotating speed control method and device, air conditioner external unit device and air conditioning equipment - Google Patents
Fan rotating speed control method and device, air conditioner external unit device and air conditioning equipment Download PDFInfo
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- CN111219351A CN111219351A CN202010051958.9A CN202010051958A CN111219351A CN 111219351 A CN111219351 A CN 111219351A CN 202010051958 A CN202010051958 A CN 202010051958A CN 111219351 A CN111219351 A CN 111219351A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- Combustion & Propulsion (AREA)
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- Thermal Sciences (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The application relates to a fan rotating speed control method and device, an air conditioner external unit device and air conditioning equipment. The method comprises the following steps: acquiring the current working state of a fan, wherein the working state of the fan comprises a starting state and an operating state; when the current working state of the fan is a starting state, generating a target rotating speed feedback signal and sending the target rotating speed feedback signal to the main controller so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal; adjusting the rotating speed of the fan according to the speed adjusting signal so as to enable the fan to enter an operating state; when the fan enters an operating state, generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal; and adjusting the real-time rotating speed of the fan according to the speed stabilizing signal.
Description
Technical Field
The application relates to the technical field of air conditioning equipment, in particular to a method and a device for controlling the rotating speed of a fan, an air conditioner external unit device and air conditioning equipment.
Background
The air conditioner needs to control the rotating speed of a fan to achieve the purpose of heating or refrigerating when in work, the traditional fan control mode is mainly characterized in that the rotating speed of the fan is controlled by means of the fact that fan rotating speed information is interacted between a main control board and a drive board, namely the main control board adjusts the rotating speed of the fan in real time according to system conditions and converts a target rotating speed into voltage to be sent to the drive board, the drive board drives the fan to operate according to the target rotating speed after receiving the target rotating speed, meanwhile, the drive board feeds the real-time rotating speed of the fan back to the main control board in a pulse mode, and the main control board judges the real-time.
Traditional fan control mode is at the fan from the in-process of starting, for example when the fan starts from after the fault recovery, because the main control board can only decide the size of output voltage according to the real-time rotational speed of fan for the fan is too big in the starting process output voltage, leads to the motor speed of fan to rush to very big in the twinkling of an eye, produces very big noise.
Disclosure of Invention
Therefore, it is necessary to provide a method and a device for controlling the rotational speed of a fan, an air conditioner external unit device and an air conditioner, which can reduce the starting noise of the fan, in order to solve the problem of excessive noise in the starting process of the fan.
A method for controlling the rotating speed of a fan. The method comprises the following steps:
acquiring the current working state of a fan, wherein the working state of the fan comprises a starting state and an operating state; when the current working state of the fan is a starting state, generating a target rotating speed feedback signal and sending the target rotating speed feedback signal to the main controller so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal; adjusting the rotating speed of the fan according to the speed adjusting signal so as to enable the fan to enter an operating state; when the fan enters an operating state, generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal; and adjusting the real-time rotating speed of the fan according to the speed stabilizing signal.
A fan speed control apparatus, the apparatus comprising:
the state acquisition module is used for acquiring the current working state of the fan, wherein the working state of the fan comprises a starting state and an operating state;
the target rotating speed feedback module is used for generating a target rotating speed feedback signal and sending the target rotating speed feedback signal to the main controller when the current working state of the fan is a starting state so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal;
the speed regulating module is used for regulating the rotating speed of the fan according to the speed regulating signal so as to enable the fan to enter the running state;
the real-time rotating speed feedback module is used for generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller when the fan enters the running state so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal;
and the speed stabilizing module is used for adjusting the real-time rotating speed of the fan according to the speed stabilizing signal.
The air conditioner external unit device comprises a main controller, a driver and a fan, wherein the main controller is connected with the fan through the driver, and the driver controls the rotating speed of the fan according to the fan rotating speed control method.
An air conditioning equipment, this air conditioning equipment includes foretell outer machine device of air conditioner.
According to the fan rotating speed control method and device, the air conditioner external unit device and the air conditioner equipment, when the current working state of the fan is the starting state, the driver generates a target rotating speed feedback signal and sends the target rotating speed feedback signal to the main controller, so that the main controller generates a speed regulating signal according to the target rotating speed feedback signal, avoids the main controller from outputting larger control voltage according to the real-time rotating speed of the fan in the starting process of the fan, when the fan finishes the starting process and enters the running state, the driver generates a real-time rotating speed feedback signal and sends the real-time rotating speed feedback signal to the main controller, so that the main controller generates a speed stabilizing signal according to the real-time rotating speed feedback signal, in order to maintain the real-time rotational speed of fan, the effectual fan of having avoided in the process of starting condition to running state the control voltage of main control unit output too big, lead to the fan rotational speed to rush to very big in the twinkling of an eye, produce the problem of very big noise.
Drawings
FIG. 1 is a flow chart illustrating a method for controlling a rotational speed of a fan according to an embodiment;
FIG. 2 is a flow chart of a method for controlling a rotational speed of a fan according to another embodiment;
FIG. 3 is a block diagram of a fan speed control apparatus according to an embodiment;
FIG. 4 is a structural frame diagram of a fan speed control apparatus according to an embodiment;
FIG. 5 is a structural diagram of an outdoor unit installation of an air conditioner in accordance with an embodiment;
fig. 6 is a structural frame diagram of an air conditioner outdoor unit device in accordance with still another embodiment;
FIG. 7 is a flow chart illustrating a conventional method for controlling the rotational speed of a fan;
FIG. 8 is a schematic rotational speed diagram of a fan under a conventional fan speed control method;
FIG. 9 is a flow chart illustrating a method for controlling a rotational speed of a fan according to another embodiment;
FIG. 10 is a schematic diagram illustrating fan speed adjustment according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, a method for controlling a rotational speed of a fan is provided, the method comprising the steps of:
and S200, acquiring the current working state of the fan. The working state of the fan comprises a starting state and an operating state.
Specifically, the fan is connected with the main controller through the driver in the working process, the driver is used for driving the fan to operate, the main controller serves as a data processing unit to process various state data of the fan, and the driver serves as an intermediate device and can acquire the current working state of the fan (for example, the driver can further analyze the current working state of the fan according to the real-time rotating speed of the fan). It should be noted that the starting state of the fan is a process state, which means that the fan starts from a lower rotation speed to enter a normal working rotation speed, for example, the process that the fan reaches the normal working rotation speed from the startup operation is called a starting state, and the starting state includes five processes of voltage offset calculation, bootstrap charging, positioning, starting and running; the running state of the fan refers to the state of the fan at normal working rotating speed, and it can be understood that the fan can enter the running state from the starting state and can also enter the starting state from the running state. Further, in other embodiments, the process from the fault shutdown (e.g., the fault shutdown caused by the transient drop in the grid voltage) to the restoration of the normal operating speed of the wind turbine may also be used as a starting state of the wind turbine.
And S300, when the current working state of the fan is a starting state, generating a target rotating speed feedback signal and sending the target rotating speed feedback signal to the main controller so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal.
Specifically, the driver is used as a connection device between the fan and the main controller, when the main controller controls the fan through the driver, the main controller generates a corresponding control signal (e.g., a speed regulation signal) according to a feedback signal (e.g., a target rotation speed feedback signal) sent by the driver to the main controller to regulate the rotation speed of the fan, the control signal can be understood as a VSP voltage (e.g., an output voltage signal), when the main controller needs to control the fan to increase the speed, the VSP voltage can be increased, when the main controller needs to control the fan to decrease the speed, the VSP voltage can be decreased, when the main controller needs to maintain the rotation speed of the fan at the working rotation speed, the VSP voltage can be kept constant, the main controller sends the VSP voltage to the driver, the driver obtains rotation speed information according to the VSP voltage, and regulates the rotation speed of the fan according to the rotation speed information (e.g., regulate the fan to, Down speed or maintain operating speed). As can be understood from the above description, in step S300, when the driver monitors that the current operating state of the fan is the start state, a target rotational speed feedback signal is generated and sent to the main controller, where the target rotational speed feedback signal includes the rotational speed of the fan in the normal operating state of the fan (i.e., the operating rotational speed of the fan), and when the main controller obtains the target rotational speed feedback signal including the operating rotational speed of the fan, a speed-adjusting signal is generated according to the operating rotational speed of the fan, it should be noted that the target rotational speed feedback signal including the operating rotational speed of the fan is received by the main controller, that is, the target rotational speed feedback signal received by the main controller at this time is equivalent to that the main controller determines that the fan is at the operating rotational speed (and actually the fan is at the start state at this time, the rotational speed does not reach the, at this time, the speed regulation signal, i.e., the VSP voltage, sent by the main controller is unchanged (i.e., the VSP voltage is maintained at the level of the past time and is not increased or decreased), and the driver can still drive the fan in the starting state through the VSP voltage to slowly increase the rotation speed until the rotation speed of the fan reaches the working rotation speed.
S400, adjusting the rotating speed of the fan according to the speed adjusting signal to enable the fan to enter a running state.
Specifically, in step S300, because the VSP voltage (i.e., the speed regulation signal) sent by the main controller does not change, when the driver adjusts the rotation speed of the fan according to the VSP voltage, the rotation speed of the fan will not rush to a large value instantaneously (if the VSP voltage sent by the main controller is increased, the driver will rush to a large value instantaneously according to the VSP voltage), but the fan will be accelerated in a relatively gentle state, and after the fan is accelerated to the operating rotation speed, the fan enters the running state.
And S500, when the fan enters the running state, generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal.
Specifically, when the driver monitors that the fan enters the running state, the real-time rotating speed of the fan is collected at the moment, and a real-time rotating speed feedback signal is generated according to the real-time rotating speed and sent to the main controller.
S600, adjusting the real-time rotating speed of the fan according to the speed stabilizing signal. Specifically, after receiving a speed stabilizing signal (i.e., a constant VSP voltage) sent by the main controller, the driver maintains the real-time rotational speed of the fan at the operating rotational speed according to the speed stabilizing signal. It should be noted that the above-mentioned operating speed is a preset value, for example, each of the different types of fans has a preset operating speed, and the real-time speed of the fan during normal operation is maintained to be equal to the operating speed.
According to the method, when the current working state of the fan is a starting state, the driver generates a target rotating speed feedback signal and sends the target rotating speed feedback signal to the main controller, so that the main controller generates a speed regulation signal according to the target rotating speed feedback signal, the situation that the main controller outputs a large control voltage according to the real-time rotating speed of the fan in the starting process is avoided, when the fan finishes the starting process and enters the running state, the driver generates a real-time rotating speed feedback signal and sends the real-time rotating speed feedback signal to the main controller, the main controller generates a speed stabilization signal according to the real-time rotating speed feedback signal to maintain the real-time rotating speed of the fan, and the problem that the rotating speed of the fan is instantly rushed to be large and generates a large noise due to the fact that the control voltage output by.
In one embodiment, as shown in fig. 2, step S200 further includes step S101 and step S102 before, step S101, obtaining a bus voltage value of the fan, comparing the bus voltage value with a preset voltage threshold, and determining whether the bus voltage value is less than or equal to the preset voltage threshold. And S102, when the bus voltage value is smaller than or equal to a preset voltage threshold value, controlling the fan to stop.
Specifically, the fan needs to be connected into the electric wire netting through the bus and obtains the power in the course of the work, and when the fan normally worked, there was the situation of falling in the twinkling of an eye in electric wire netting voltage, when the bus voltage value falls suddenly and is less than or equal to and predetermines the voltage threshold value promptly, because the fan is normally working, in order to avoid the fan to receive the damage, the driver can control the fan and shut down. In other embodiments, after step S600, it is also possible to proceed to step S101 to loop through the steps in fig. 2.
Further, in an embodiment, after the step S102, a step S103 is further included, when the fan is stopped, if it is detected that the bus voltage value of the fan is greater than a preset voltage threshold, the fan is controlled to be started, and the current working state of the fan is determined as a starting state.
Specifically, the grid voltage drop occurs in a short time, after the fan is shut down due to the grid voltage drop, if the grid voltage is recovered to a normal state, namely when the bus voltage value is greater than a preset voltage threshold value, the driver controls the fan to recover from the shutdown state, the fan is started, and the fan needs to recover to the operation from the shutdown state at the moment, so that a starting process exists, and the starting process can be called as a starting state.
Further, in an embodiment, as shown in fig. 2, the step S101 further includes, after the step S: when the bus voltage value is greater than the preset voltage threshold, the process proceeds to step S101.
Specifically, in the normal working process of the fan, when the driver monitors that the bus voltage value is greater than the preset voltage threshold value, the current situation that the power grid voltage drops instantly is represented, at this moment, the driver does not control the fan to stop, but continues to drive the fan to continue to operate, and meanwhile, the driver also continues to monitor whether the power grid voltage drops instantly in the following process.
In one embodiment, step S300 includes the steps of: and acquiring a preset target rotating speed of the fan, and generating a target rotating speed feedback signal according to the preset target rotating speed. Specifically, the preset target rotating speed is the above-mentioned working rotating speed, and the preset target rotating speed represents the rotating speed that the fan should reach when normally working, and when the fan is in a starting state, the driver can generate a target rotating speed feedback signal, and the target rotating speed feedback signal contains the preset target rotating speed, so that the main controller can judge that the fan is currently in an operating state when receiving the target rotating speed feedback signal, and actually, the fan is in the starting state at the moment, and the current rotating speed of the fan is not the working rotating speed.
In one embodiment, step S400 includes the steps of: sending a speed regulating signal to the fan to regulate the current rotating speed of the fan; acquiring the current rotating speed of the fan and judging whether the current rotating speed of the fan reaches a preset target rotating speed or not; if so, judging that the fan enters the running state.
Specifically, after the driver acquires the speed regulation signal sent by the main controller, the speed regulation signal is converted (for example, converted into a driving current signal or a driving voltage signal), and then the driving current signal or the driving voltage signal is sent to the fan, so as to increase the rotating speed of the fan in the starting state, and when the rotating speed of the fan is slowly increased to a preset target rotating speed (namely, a working rotating speed), the fan enters the running state from the starting state at the moment.
In one embodiment, step S500 includes the steps of: and acquiring the real-time rotating speed of the fan, and generating a real-time rotating speed feedback signal according to the real-time rotating speed. Specifically, after the fan enters the running state, the driver is distinguished from the target rotating speed feedback signal in step S300, and generates a real-time rotating speed feedback signal according to the real-time rotating speed of the fan and sends the real-time rotating speed feedback signal to the main controller, that is, the real-time rotating speed feedback signal received by the main controller contains the current actual real-time rotating speed of the fan, instead of the target rotating speed feedback signal containing the preset target rotating speed in step S300.
In one embodiment, as shown in fig. 3, there is provided a fan speed control apparatus including: the state obtaining module 200 is configured to obtain a current working state of the fan, where the working state of the fan includes a starting state and an operating state. And the target rotating speed feedback module 300 is configured to generate a target rotating speed feedback signal and send the target rotating speed feedback signal to the main controller when the current working state of the fan is a starting state, so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal. And the speed regulating module 400 is used for regulating the rotating speed of the fan according to the speed regulating signal so as to enable the fan to enter the running state. And the real-time rotating speed feedback module 500 is used for generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller when the fan enters the running state so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal. And the speed stabilizing module 600 is used for adjusting the real-time rotating speed of the fan according to the speed stabilizing signal.
Above-mentioned fan rotational speed control device, when the current operating condition of fan is the starting condition, the driver will generate the target rotational speed feedback signal and send to main control unit, make main control unit generate the speed governing signal according to target rotational speed feedback signal, avoid the fan main control unit to export great control voltage according to the real-time rotational speed of fan in the starting process, after the fan accomplished the starting process and entered into the running condition, the driver regenerates real-time rotational speed feedback signal and sends to main control unit, make main control unit generate the steady speed signal according to real-time rotational speed feedback signal, in order to maintain the real-time rotational speed of fan, the effectual fan of having avoided is too big from the starting condition to the control voltage of running condition in-process main control unit output, lead to the fan rotational speed to rush very big in the twinkling of an eye, produce.
In an embodiment, as shown in fig. 4, the fan rotation speed control apparatus further includes a voltage determining module 101, configured to obtain a bus voltage value of the fan before the state obtaining module 200 obtains the current operating state of the fan, compare the bus voltage value with a preset voltage threshold, and determine whether the bus voltage value is less than or equal to the preset voltage threshold. And the shutdown control module 102 is used for controlling the fan to be shut down when the bus voltage value is less than or equal to the preset voltage threshold value.
Further, as shown in fig. 4, in an embodiment, the system further includes a start control module 103, configured to, when the bus voltage value is less than or equal to the preset voltage threshold, the stop control module 102 is configured to control, after the fan is stopped, when the fan is stopped, if it is detected that the bus voltage value of the fan is greater than the preset voltage threshold, control the fan to start, and determine the current working state of the fan as a start state.
Further, in an embodiment, the voltage determining module 101 further includes a voltage detecting module, configured to determine that the current working state of the fan is the running state when the bus voltage value is greater than the preset voltage threshold, switch to the voltage determining module 101 to execute acquiring the bus voltage value of the fan, compare the bus voltage value with the preset voltage threshold, and determine whether the bus voltage value is less than or equal to the preset voltage threshold.
In an embodiment, the target rotation speed feedback module 300 further includes a target rotation speed feedback signal generating module, configured to obtain a preset target rotation speed of the fan, and generate a target rotation speed feedback signal according to the preset target rotation speed.
Further, in an embodiment, the speed regulating module 400 further includes a rotation speed determining module, configured to send a speed regulating signal to the fan to adjust a current rotation speed of the fan; acquiring the current rotating speed of the fan and judging whether the current rotating speed of the fan reaches a preset target rotating speed or not; if so, judging that the fan enters the running state.
Further, in an embodiment, the real-time rotation speed feedback module 500 further includes a real-time rotation speed feedback signal generating module, configured to obtain a real-time rotation speed of the fan, and generate a real-time rotation speed feedback signal according to the real-time rotation speed.
For the specific definition of the fan speed control device, reference may be made to the above definition of the fan speed control method, which is not described herein again. All or part of the modules in the fan speed control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, as shown in fig. 5, an air conditioner external unit device is provided, which includes a main controller 10, a driver 20, and a fan 30, wherein the main controller 10 is connected to the fan 30 through the driver 20, and the driver 20 controls the rotation speed of the fan according to the fan rotation speed control method. The driver 20 may obtain the rotational speed information of the fan 30, and send corresponding feedback signals (e.g., a target rotational speed feedback signal and a real-time rotational speed feedback signal) to the main controller 10, the main controller 10 generates corresponding rotational speed adjusting signals (e.g., a speed adjusting signal and a speed stabilizing signal), and the driver 20 drives the fan according to the rotational speed adjusting signals.
When the current working state of the fan 30 is the starting state, the driver 20 generates a target rotating speed feedback signal and sends the target rotating speed feedback signal to the main controller 10, so that the main controller 10 generates a speed regulating signal according to the target rotating speed feedback signal, thereby preventing the main controller 10 from outputting larger control voltage according to the real-time rotating speed of the fan in the starting process of the fan 30, after the fan 30 finishes the starting process and enters the running state, the driver 20 generates a real-time rotating speed feedback signal and sends the real-time rotating speed feedback signal to the main controller 10, so that the main controller 10 generates a speed stabilizing signal according to the real-time rotating speed feedback signal, the real-time rotating speed of the fan 30 is maintained, and the problem that the rotating speed of the fan 30 is suddenly greatly rushed to generate very large noise due to overlarge control voltage output by the main controller 10 in the process of the fan 30 from the starting state to the running state is effectively solved.
In one embodiment, as shown in fig. 6, the outdoor unit device of the air conditioner further includes a rotation speed collecting assembly 40, the rotation speed collecting assembly 40 is connected to the driver 20 and the fan 30, and the rotation speed collecting assembly 40 includes an associated rotation speed sensing sensor, and when the fan 40 is operated, the rotation speed of the fan 40 is collected and transmitted to the driver 20.
In one embodiment, as shown in fig. 6, the outdoor unit device further includes a voltage collecting assembly 50, and the voltage collecting assembly 50 is connected to the driver 20 and the fan 30. The fan 30 includes a bus connected to the power grid for connection to a power source, and the voltage acquisition assembly 50 is connected to the bus in the fan 30 to acquire and transmit a bus voltage value to the driver 20.
In one embodiment, as shown in fig. 6, the outdoor unit device of an air conditioner further includes a signal conversion assembly 60, and the main controller 10 is connected to the driver 20 through the signal conversion assembly 60. Signal conversion component 60 is used to perform signal conversion and includes an analog-to-digital/digital-to-analog converter, for example, when host controller 10 sends a VSP voltage to driver 20, the signal conversion component needs to convert the VSP voltage to a digital signal to facilitate recognition by driver 20.
In one embodiment, an air conditioning apparatus is provided, which includes the air conditioner external unit device described above. Correspondingly, the air conditioning equipment also comprises an air conditioning inner machine which can adopt the prior art, and the detailed description of the air conditioning inner machine is not needed, when the current working state of the fan is the starting state, the driver generates a target rotating speed feedback signal and sends the target rotating speed feedback signal to the main controller, so that the main controller generates a speed regulating signal according to the target rotating speed feedback signal, the situation that the main controller outputs larger control voltage according to the real-time rotating speed of the fan in the starting process of the fan is avoided, when the fan finishes the starting process and enters the running state, the driver generates a real-time rotating speed feedback signal and sends the real-time rotating speed feedback signal to the main controller, so that the main controller generates a speed stabilizing signal according to the real-time rotating speed feedback signal to maintain the real-time rotating speed of the fan, and the situation that the control voltage output by the main, the rotating speed of the fan is instantaneously rushed to be large, and the problem of generating large noise is caused.
In one embodiment, referring first to fig. 7 for a detailed description of the present application, fig. 7 shows a conventional fan speed control process, when the main controller first detects that the actual speed of the fan is less than the target speed (i.e. the operating speed in the above-mentioned step), if the time lasts for 30 seconds, the main controller can judge that the fan has a fault, stop sending the VSP voltage to the driver, during this period of 30 seconds, however, the main controller will always increase the VSP voltage in an effort to increase the actual speed of the fan to the target speed, and, correspondingly, when the main controller detects that the actual rotating speed of the fan is greater than the target rotating speed (namely the working rotating speed), the main controller can reduce the VSP voltage to reduce the actual rotating speed of the fan to the target rotating speed, and only when the actual rotating speed of the fan is consistent with the target rotating speed (namely the working rotating speed), the main controller can output the constant VSP voltage to enable the actual rotating speed of the fan to be consistent with the target rotating speed. Further referring to fig. 8, fig. 8 is a rotation speed adjustment curve diagram of a fan under a conventional fan rotation speed control method, the fan is in a fault shutdown state at a time t1, the rotation speed of the fan is zero, at this time, because the rotation speed fed back to the main controller by the driver is smaller than a target rotation speed (i.e., a working rotation speed), the VSP voltage output by the main controller continuously increases, at the time t2, the rotation speed fed back to the main controller by the fan fault recovery driver is still smaller than the target rotation speed, the VSP voltage output by the main controller continuously increases, the rotation speed of the fan at the time t3 is equal to the target rotation speed, at the time t4, the rotation speed detected is greater than the target rotation speed, the VSP voltage starts to decrease but at this time, the rotation speed at the time t5 is consistent with the VSP voltage, at this time. According to the traditional fan rotating speed control method, the VSP voltage output by the main controller is too large, the rotating speed of the fan can rush to a large value instantly, large noise can be generated, and meanwhile the experience effect of a user is seriously influenced by the sudden change of the wind speed. With further reference to fig. 9, fig. 9 is a method for controlling a rotational speed of a fan according to an embodiment of the present disclosure, where a driver first determines whether the fan is in an operating state, and when the fan is in the operating state, the driver sends an actual rotational speed of the fan to a main controller, and when the fan is in a process of being shut down to recover after a voltage drop (i.e., in a start state), the driver sends a target rotational speed (i.e., a preset target rotational speed) to the main controller, so that a VSP voltage sent by the main controller according to the target rotational speed will not be continuously increased, but a constant VSP voltage is continuously output to the driver, so that the driver can drive the fan according to the constant VSP voltage, and the rotational speed of the fan smoothly rises to the target, thereby greatly enhancing. Referring to fig. 10, fig. 10 is a graph of fan rotation speed corresponding to fig. 9, because the rotation speed fed back by the driver is always the target rotation speed, the VSP voltage output by the main controller is always constant, the fan is in a fault shutdown state at time t1, the motor of the fan is restarted at time t2, but because the fan is in a start state at this time, the driver sends a target rotation speed feedback signal containing the target rotation speed to the main controller, so the VSP voltage generated by the main controller according to the target rotation speed feedback signal does not change and is still kept at a level before the fan is stopped, the fan rotation speed reaches the target rotation speed at time t3, the fan finishes the start state and enters an operation state, as can be seen from fig. 10, the fan rotation speed does not overshoot during the restart process (the restart process is mainly at time t2-t3, wherein the time t1-t3 is in the start state) (compared with the conventional manner in fig. 8), the problem of noise is solved well, and the user experience effect is improved greatly.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A fan speed control method is characterized by comprising the following steps:
acquiring the current working state of a fan, wherein the working state of the fan comprises a starting state and an operating state;
when the current working state of the fan is a starting state, generating a target rotating speed feedback signal and sending the target rotating speed feedback signal to a main controller so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal;
adjusting the rotating speed of the fan according to the speed adjusting signal so as to enable the fan to enter the running state;
when the fan enters the running state, generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal;
and adjusting the rotating speed of the fan according to the speed stabilizing signal.
2. The method for controlling the rotating speed of the fan according to claim 1, wherein before acquiring the current working state of the fan, the method further comprises:
acquiring a bus voltage value of the fan, comparing the bus voltage value with a preset voltage threshold value, and judging whether the bus voltage value is smaller than or equal to the preset voltage threshold value;
and when the bus voltage value is smaller than or equal to the preset voltage threshold value, controlling the fan to stop.
3. The method for controlling the rotation speed of the fan according to claim 2, wherein when the bus voltage value is less than or equal to the preset voltage threshold value, after the fan is controlled to be stopped, the method comprises the following steps:
when the fan is stopped, if the bus voltage value of the fan is detected to be larger than the preset voltage threshold value, the fan is controlled to be started, and the current working state of the fan is judged to be a starting state.
4. The method for controlling the rotating speed of the fan according to claim 2, wherein after acquiring a bus voltage value of the fan, comparing the bus voltage value with a preset voltage threshold value and determining whether the bus voltage value is less than or equal to the preset voltage threshold value, the method further comprises:
and when the bus voltage value is larger than a preset voltage threshold value, the step of obtaining the bus voltage value of the fan and comparing the bus voltage value of the fan with the preset voltage threshold value is carried out.
5. The method for controlling the rotating speed of the fan according to claim 1, wherein the generating a target rotating speed feedback signal when the current working state of the fan is a starting state comprises:
the method comprises the steps of obtaining a preset target rotating speed of a fan, and generating a target rotating speed feedback signal according to the preset target rotating speed.
6. The method for controlling the rotation speed of the fan according to claim 5, wherein the adjusting the rotation speed of the fan according to the speed regulation signal to enable the fan to enter the running state comprises:
sending the speed regulating signal to the fan to regulate the current rotating speed of the fan;
acquiring the current rotating speed of the fan and judging whether the current rotating speed of the fan reaches the preset target rotating speed or not;
if so, judging that the fan enters the running state.
7. The method of claim 1, wherein generating a real-time speed feedback signal when the fan enters the operational state comprises:
and acquiring the real-time rotating speed of the fan, and generating the real-time rotating speed feedback signal according to the real-time rotating speed.
8. A fan speed control apparatus, the apparatus comprising:
the state acquisition module is used for acquiring the current working state of the fan, wherein the working state of the fan comprises a starting state and an operating state;
the target rotating speed feedback module is used for generating a target rotating speed feedback signal and sending the target rotating speed feedback signal to the main controller when the current working state of the fan is a starting state so as to obtain a speed regulating signal generated by the main controller according to the target rotating speed feedback signal;
the speed regulating module is used for regulating the rotating speed of the fan according to the speed regulating signal so as to enable the fan to enter the running state;
the real-time rotating speed feedback module is used for generating a real-time rotating speed feedback signal and sending the real-time rotating speed feedback signal to the main controller when the fan enters the running state so as to obtain a speed stabilizing signal generated by the main controller according to the real-time rotating speed feedback signal;
and the speed stabilizing module is used for adjusting the real-time rotating speed of the fan according to the speed stabilizing signal.
9. An outdoor unit device of an air conditioner, comprising a main controller, a driver and a fan, wherein the main controller is connected with the fan through the driver, and the driver controls the rotation speed of the fan according to the method of any one of claims 1 to 7.
10. The apparatus of claim 9, wherein the outdoor unit comprises a rotational speed sensor assembly, the rotational speed sensor assembly is connected to the driver and the fan.
11. The apparatus of claim 9, wherein the outdoor unit of an air conditioner includes a voltage collecting assembly, and the voltage collecting assembly is connected to the driver and the fan.
12. The apparatus of claim 9, wherein the outdoor unit apparatus further comprises a signal conversion assembly, and the signal conversion assembly is connected to the driver and the main controller.
13. An air conditioning apparatus, characterized in that it comprises an outdoor unit device of an air conditioner according to any one of claims 9 to 12.
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