CN111780377B - Fan rotating speed control method and device and air conditioning equipment - Google Patents
Fan rotating speed control method and device and air conditioning equipment Download PDFInfo
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- CN111780377B CN111780377B CN202010549532.6A CN202010549532A CN111780377B CN 111780377 B CN111780377 B CN 111780377B CN 202010549532 A CN202010549532 A CN 202010549532A CN 111780377 B CN111780377 B CN 111780377B
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a fan rotating speed control method and device and air conditioning equipment. Wherein, each wind gap of air conditioning equipment corresponds at least one fan, and the method comprises the following steps: determining at least one target fan needing to be started according to the set wind shield of the wind gap; determining an operation mode of the target fan; acquiring the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode; and adjusting the current rotating speed of the target fan according to the electrical parameter. The fans can independently control the starting, the stopping and the rotating speed, and the operating rotating speed of each fan can be independently controlled through the corresponding electrical parameters of each fan in the corresponding operating mode, so that the optimal rotating speed setting of the fans in different operating modes is realized, and the comfort of users using air conditioning equipment is improved.
Description
Technical Field
The invention 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 and the air conditioning equipment.
Background
The number of the air supply motors corresponding to one air port of a single light commercial air conditioner (namely a unit type air conditioner in a one-to-one mode) is at most 2, the control mode of the fans is that the fans are started or stopped simultaneously, the rotating speeds of the 2 fans at the same moment are the same, the rotating speed setting of the 2 fans is determined according to the air volume requirement of the whole air conditioner, the high air volume requirement corresponds to the high rotating speed, the noise generated at the high rotating speed is higher, and the comfort is poor.
Aiming at the problem that the comfort of a user is influenced by a fan rotating speed control mode in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling the rotating speed of a fan and air conditioning equipment, and aims to solve the problem that the comfort of a user is influenced by the rotating speed control mode of the fan in the prior art.
In order to solve the above technical problem, an embodiment of the present invention provides a method for controlling a rotational speed of a fan, where each air outlet of an air conditioning device corresponds to at least one fan, and the method includes:
determining at least one target fan needing to be started according to the set wind shield of the wind gap;
determining an operation mode of the target fan;
acquiring the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode;
and adjusting the current rotating speed of the target fan according to the electrical parameter.
Optionally, determining at least one target fan to be started according to the set wind shield of the wind gap includes: and determining at least one target fan which needs to be started under the set wind shield in at least one fan corresponding to the wind gap according to the preset corresponding relation between the wind shields and the starting and stopping of the fans.
Optionally, determining the operation mode of the target fan includes: acquiring the current temperature and the set temperature of the area where the tuyere is located, and determining the operation mode according to the difference value of the current temperature and the set temperature; or, determining the operation mode according to user setting information.
Optionally, determining the operation mode according to the difference between the current temperature and the set temperature includes:
if the difference value is greater than or equal to a first preset threshold value and less than or equal to a second preset threshold value, determining that the operation mode is a noise optimal mode;
and if the difference value is smaller than the first preset threshold value or larger than the second preset threshold value, determining that the operation mode is the energy efficiency optimal mode.
Optionally, if the operation mode is a noise optimal mode, the electrical parameter type corresponding to the noise optimal mode is the harmonic content of the current of the fan motor winding;
adjusting the current rotating speed of the target fan according to the electrical parameter, comprising:
if the collected current harmonic content is greater than a preset harmonic threshold and the difference value between the current rotating speed and a preset rotating speed regulating quantity is greater than a third preset threshold, reducing the current rotating speed by the preset rotating speed regulating quantity;
and if the current harmonic content is less than or equal to the preset harmonic threshold value, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is less than or equal to the third preset threshold value, controlling the target fan to continuously operate at the current rotating speed.
Optionally, if the operation mode is an energy efficiency optimal mode, the electrical parameter type corresponding to the energy efficiency optimal mode is a phase angle between voltage and current of a winding of a fan motor;
adjusting the current rotating speed of the target fan according to the electrical parameter, comprising:
calculating a current power factor according to the acquired current phase angle;
if the current power factor is smaller than the lowest power factor allowed by the motor and the difference value between the current rotating speed and a preset rotating speed regulating quantity is within a preset range, adjusting the current rotating speed by the preset rotating speed regulating quantity;
and if the current power factor is greater than or equal to the lowest power factor allowed by the motor, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is not in the preset range, controlling the target fan to continuously operate at the current rotating speed.
Optionally, adjusting the current rotation speed by the preset rotation speed adjustment amount includes:
for the set wind gear, if the target fan meets the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time in the energy efficiency optimal mode and the difference value between the current rotating speed and the preset rotating speed regulating quantity is in the preset range, increasing the current rotating speed by the preset rotating speed regulating quantity;
if the target fan does not meet the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time and the difference value between the current rotating speed and the preset rotating speed regulating quantity is within the preset range in the energy efficiency optimal mode, reducing the current rotating speed by the preset rotating speed regulating quantity under the condition that the current power factor is increased relative to the power factor corresponding to the last rotating speed of the target fan; and under the condition that the current power factor is reduced relative to the power factor corresponding to the last rotating speed of the target fan, increasing the current rotating speed by the preset rotating speed regulating quantity.
Optionally, after determining the operation mode of the target fan, the method further includes:
acquiring the minimum value and the maximum value of the fan rotating speed range corresponding to the set wind gear;
if the operation mode is the optimal noise mode, determining that the initial rotating speed of the target fan entering the optimal noise mode is the maximum value;
and if the operation mode is the energy efficiency optimal mode, determining that the initial rotating speed of the target fan entering the energy efficiency optimal mode is a preset intermediate value, wherein the preset intermediate value is between the minimum value and the maximum value.
The embodiment of the invention also provides a fan rotating speed control device, each air port of air-conditioning equipment corresponds to at least one fan, and the device comprises:
the first determining module is used for determining at least one target fan needing to be started according to the set wind gear of the wind gap;
the second determination module is used for determining the operation mode of the target fan;
the acquisition module is used for acquiring the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode;
and the adjusting module is used for adjusting the current rotating speed of the target fan according to the electrical parameters.
The embodiment of the present invention further provides an air conditioning device, where each air port of the air conditioning device corresponds to at least one fan, and the air conditioning device includes: the embodiment of the invention relates to a fan rotating speed control device.
Optionally, the air conditioning equipment includes at least two air inlets, and the at least two air inlets include an air outlet and a return air inlet.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the method for controlling the rotating speed of the fan is realized.
By applying the technical scheme of the invention, at least one target fan to be started is determined according to the set wind gear of the wind port, the operation mode of the target fan is determined, the electrical parameter of the target fan is acquired according to the electrical parameter type corresponding to the operation mode, the current rotating speed of the target fan is adjusted according to the electrical parameter, each fan can independently control the starting, stopping and rotating speed, the operating rotating speed of each fan can be independently controlled through the corresponding electrical parameter of each fan in the corresponding operation mode, the optimal rotating speed setting of the fans in different operation modes is realized, and the comfort of users using air conditioning equipment is improved.
Drawings
FIG. 1 is a flow chart of a method for controlling a rotational speed of a fan according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a specific process for controlling the rotational speed of a fan according to an embodiment of the present invention;
fig. 3 is a block diagram of a structure of a fan rotation speed control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a fan rotating speed control method, which can realize independent control of fans corresponding to air outlets of air-conditioning equipment, adjust the rotating speed of the fans according to corresponding fan electrical parameters in different modes, realize better rotating speed setting and improve the comfort of users using the air-conditioning equipment. Each air port of the air conditioning equipment corresponds to at least one fan, and the air gear of the air port can be set no matter the air port is used as an air outlet or an air return port, the air gear refers to the air speed gear (also called as a fan gear) of the air port, and the air gear is realized by the rotating speed of the fan corresponding to the air port. The fan speed is actually the speed of the fan's motor.
Fig. 1 is a flowchart of a method for controlling a rotational speed of a fan according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:
s101, determining at least one target fan needing to be started according to the set wind gear of the wind gap.
The setting of the wind gear refers to a target wind speed gear set by a user according to actual requirements. If the air port corresponds to one fan, the wind shield of the air port is determined by the rotating speed of the corresponding fan; if the air port corresponds to at least two fans, different wind gears are determined by the number of the started and stopped fans and the rotating speed of the fans. The fan has corresponding fan rotating speed ranges under different wind gears, for example, the fan rotating speed range is [ Mna, Mnb ] under the wind gear n, and the larger the wind gear is, the larger the corresponding fan rotating speed range is.
The user operates the wind gear button of the wire controller of the air conditioning equipment to set the target wind gear of the air port, and the relational expression between the wind gear, the number of the started and stopped fans and the rotating speed of the fans is as follows:
the gear fan (n) k1n × V1n + k2n × V2n + … + kin × Vin,
wherein Fan (n) represents windshield n; i represents the number of fans corresponding to the air inlet; kin represents the start-stop coefficient of the ith fan, the kin value is 0 or 1, 0 represents that the fan is closed, and 1 represents that the fan is opened; vin represents the rotational speed of the ith fan, Vin ∈ [ Mna, Mnb ].
According to the relational expression, the starting, stopping and rotating speed of the i fans are parameters of the wind shield, and the complementary relation among the fans is embodied.
The corresponding relation between the wind gears and the starting and stopping of the fans can be set in advance, namely the fans need to be started at the wind ports under different wind gears, so that the corresponding fans can be started according to the corresponding relation after the wind gears are set by a user to achieve the set wind gears, and the user requirements are met. If the number of fans corresponding to different air ports is different, the fans which need to be opened under different wind gears can be set according to the number of the fans. At least one target fan needing to be started is determined according to the set wind gear of the wind gap, and the method comprises the following steps: and determining at least one target fan which needs to be started under the set wind shield in at least one fan corresponding to the wind gap according to the preset corresponding relation between the wind shields and the starting and stopping of the fans. Illustratively, the air opening a corresponds to 3 fans abc, 1 fan (for example, fan a) needs to be started under the wind level 1, 2 fans (for example, fans a and c) needs to be started under the wind level 2, and fans a, b, and c need to be started under the wind level 3.
And S102, determining the operation mode of the target fan.
The operation mode of the fan is a noise optimal mode or an energy efficiency optimal mode, and the noise optimal mode is to control the noise of the fan to be optimal so as to avoid the influence of overlarge noise on a user; the energy efficiency optimal mode is to control the energy efficiency to be optimal so as to meet the temperature regulation requirement of a user and reduce the energy consumption as much as possible. The operation modes of all target fans needing to be started at the current air ports under the set wind gear are the same.
S103, collecting the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode.
The electrical parameters refer to electrical parameters of the fan, and specifically refer to electrical parameters of a fan motor winding, such as current, voltage, phase and the like. And different types of electrical parameters are used as the basis for adjusting the rotating speed of the fan in different operation modes.
And S104, adjusting the current rotating speed of the target fan according to the electrical parameters.
And for any target fan which is started, the rotating speed of each target fan can be adjusted according to the steps. If the air port only corresponds to one fan, aiming at the current set wind gear and the current operation mode, the rotating speed of the fan can be adjusted, the optimal rotating speed configuration is realized, and the comfort of a user is ensured. If the air port corresponds to two or more fans, the fans can be independently controlled to start, stop and rotate. It should be noted that, no matter the user sets the target temperature and the wind gear when the air conditioner is just started, or the user changes the setting of the temperature and the wind gear in the operation process of the air conditioner, the rotating speed of the related fan can be independently controlled according to the steps.
The fan rotating speed control method provided by the embodiment of the invention comprises the steps of determining at least one target fan to be started according to a set wind gear of a wind port, determining an operation mode of the target fan, acquiring electrical parameters of the target fan according to electrical parameter types corresponding to the operation mode, adjusting the current rotating speed of the target fan according to the electrical parameters, independently controlling starting, stopping and rotating speeds of the fans, and independently controlling the operating rotating speed of each fan according to the corresponding electrical parameters of each fan in the corresponding operation mode, so that the optimal rotating speed setting of the fans in different operation modes is realized, and the comfort of users in using air conditioning equipment is improved.
The fan operation mode can be automatically determined through related data or manually set by a user. Specifically, the step S102 of determining the operation mode of the target fan includes: acquiring the current temperature and the set temperature of the area where the air inlet is located, and determining an operation mode according to the difference value of the current temperature and the set temperature; or, the operation mode is determined according to the user setting information. The operation mode of the fan can be simply and reliably determined through the temperature difference, so that the rotating speed of the fan can be optimally controlled in the corresponding operation mode.
Further, determining the operation mode according to the difference between the current temperature and the set temperature includes: if the difference value is greater than or equal to a first preset threshold value and less than or equal to a second preset threshold value, determining that the operation mode is the optimal noise mode; and if the difference value is smaller than a first preset threshold value or larger than a second preset threshold value, determining that the operation mode is the energy efficiency optimal mode.
The first preset threshold and the second preset threshold can be set according to actual requirements. If the difference value is greater than or equal to the first preset threshold value and less than or equal to the second preset threshold value, the temperature difference is not large, and noise generated by the fan can be controlled in a stressed mode. If the difference value is smaller than the first preset threshold value or larger than the second preset threshold value, the temperature difference is large, the set temperature needs to be reached as soon as possible, the energy efficiency is optimal, and the influence of noise can be ignored. The user setting information is information for setting the target fan operation mode, which is manually input by a user, for example, input through an interactive interface or selection through a button.
The following describes the adjustment of the fan rotation speed in the noise optimization mode and the energy efficiency optimization mode, respectively.
(1) Noise optimum mode
And if the operation mode is the noise optimal mode, the electrical parameter type corresponding to the noise optimal mode is the harmonic content of the current of the fan motor winding. S104, adjusting the current rotating speed of the target fan according to the electrical parameters, wherein the adjusting comprises the following steps:
if the collected current harmonic content is greater than a preset harmonic threshold and the difference value between the current rotating speed and the preset rotating speed regulating quantity is greater than a third preset threshold, reducing the current rotating speed by the preset rotating speed regulating quantity;
and if the current harmonic content is less than or equal to a preset harmonic threshold value, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is less than or equal to a third preset threshold value, controlling the target fan to continuously operate at the current rotating speed.
The larger the harmonic content of the motor winding current is, the more serious the magnetic field distortion is, and the more easily the electromagnetic noise of the motor is induced. Therefore, a harmonic safety coefficient is set, and the harmonic safety coefficient is critical harmonic content induced by electromagnetic noise of the test motor, namely a preset harmonic threshold value. If the current harmonic content is larger than the preset harmonic threshold, the noise is possibly generated, and the noise can be improved by reducing the rotating speed of the fan; if the current harmonic content is less than or equal to the preset harmonic threshold, electromagnetic noise is not induced, and the operation is performed according to the current rotating speed without executing related operations for controlling noise. The third preset threshold value is preferably the minimum value of the fan rotating speed range under the set wind gear, and the difference value between the current rotating speed and the preset rotating speed regulating quantity is larger than the third preset threshold value, which indicates that a reducible space exists in the allowable range (namely the fan rotating speed range under the set wind gear) of the current rotating speed; and if the difference value between the current rotating speed and the preset rotating speed regulating quantity is smaller than or equal to a third preset threshold value, which indicates that the current rotating speed cannot be reduced within the allowable range of the rotating speed of the fan, continuing to operate according to the current rotating speed.
Under the noise optimal mode, the rotating speed of the running fan is controlled according to the harmonic content of the winding current of the fan motor and the fan rotating speed range under the set wind gear, so that the rotating speed configuration with optimal fan noise is realized, and the comfort is improved.
(2) Energy efficiency optimization mode
If the operation mode is the energy efficiency optimal mode, the electrical parameter type corresponding to the energy efficiency optimal mode is the phase angle of the voltage and the current of the fan motor winding. S104, adjusting the current rotating speed of the target fan according to the electrical parameters, wherein the adjusting comprises the following steps:
calculating a current power factor according to the acquired current phase angle;
if the current power factor is smaller than the lowest power factor allowed by the motor and the difference value between the current rotating speed and the preset rotating speed regulating quantity is within a preset range, adjusting the current rotating speed by the preset rotating speed regulating quantity;
and if the current power factor is greater than or equal to the lowest power factor allowed by the motor, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is not in the preset range, controlling the target fan to continuously operate at the current rotating speed.
Wherein, the voltage phase and the current phase can be detected and obtained, and the difference value of the two phases can be calculated to obtain the phase angle. The relationship between power factor and phase angle is:
wherein eta represents a power factor, wherein,
representing the phase angle. The smaller the phase angle of the motor winding voltage and current is, the smaller the reactive power consumption of the motor is, and the higher the efficiency of the motor is. The smaller the power factor, the less useful work and the lower the motor efficiency. Therefore, the lowest power factor allowed by the motor is set, and if the current power factor is smaller than the lowest power factor allowed by the motorIndicating that the motor efficiency does not meet the requirements, and the rotating speed needs to be adjusted to improve the efficiency; if the current power factor is larger than or equal to the lowest power factor allowed by the motor, the efficiency of the motor meets the requirement, and the motor can continuously run according to the current rotating speed without adjusting the rotating speed. The preset range is preferably a fan rotating speed range corresponding to the set wind gear. The difference value between the current rotating speed and the preset rotating speed regulating quantity is in a preset range, and the difference value indicates that an adjustable space exists in an allowable range (namely a fan rotating speed range under a set wind gear) of the current rotating speed; and if the difference value between the current rotating speed and the preset rotating speed regulating quantity is not in the preset range, which indicates that the current rotating speed cannot be regulated in the allowable range of the rotating speed of the fan, continuing to operate according to the current rotating speed.
Under the energy efficiency optimal mode, the rotating speed of the running fan is controlled according to the phase angle of the voltage and the current of the winding of the fan motor and the fan rotating speed range under the set wind gear, so that the rotating speed configuration with optimal fan energy efficiency is realized, and the comfort is improved.
Further, adjusting the current rotating speed by a preset rotating speed adjustment amount comprises:
aiming at the set wind gear, if the target fan meets the condition that the current power factor is smaller than the lowest power factor allowed by the motor and the difference value between the current rotating speed and the preset rotating speed regulating quantity is in a preset range for the first time in the energy efficiency optimal mode, increasing the current rotating speed by the preset rotating speed regulating quantity so as to reach the set temperature as soon as possible;
if the target fan does not meet the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time and the difference value between the current rotating speed and the preset rotating speed regulating quantity is in the preset range in the energy efficiency optimal mode, reducing the current rotating speed by the preset rotating speed regulating quantity under the condition that the current power factor is increased relative to the power factor corresponding to the last rotating speed of the target fan; and under the condition that the current power factor is reduced relative to the power factor corresponding to the last rotating speed of the target fan, increasing the current rotating speed by a preset rotating speed regulating quantity.
When the rotating speed of the motor is adjusted in the energy efficiency optimal mode, the efficiency of the motor is low in consideration of low power factor, so that when the current power factor is reduced relative to the last power factor, the rotating speed needs to be increased to improve the efficiency of the motor; when the current power factor is increased relative to the last power factor, the rotating speed needs to be properly reduced to ensure that the energy efficiency is optimal.
Under the set wind gear, after the fan enters the corresponding operation mode, the fan starts to operate according to the corresponding initial rotating speed, and the initial rotating speed of the target fan after entering the operation mode can be determined according to the current set wind gear and the determined operation mode. Specifically, after the operation mode of the target fan is determined, the initial operation speed of the target fan in the corresponding operation mode may be determined as follows:
acquiring the minimum value and the maximum value of a fan rotating speed range corresponding to a set wind gear;
if the operation mode is the noise optimal mode, determining that the initial rotating speed of the target fan entering the noise optimal mode is the maximum value;
and if the operation mode is the energy efficiency optimal mode, determining that the initial rotating speed of the target fan entering the energy efficiency optimal mode is a preset intermediate value, wherein the preset intermediate value is between the minimum value and the maximum value.
If the fan enters the noise optimal mode, the temperature difference between the current temperature and the set temperature is small, the temperature regulation requirement can be met at a large rotating speed, and then the noise is optimized, so that the initial rotating speed in the noise optimal mode is set to be the maximum value, and the fan is regulated from the highest rotating speed downwards. The preset intermediate value is preferably half the difference between the maximum value and the minimum value. If the fan enters the energy efficiency priority mode, the difference between the current temperature and the set temperature is large, the rotating speed of the fan is mainly adjusted on the basis of ensuring the energy efficiency, and the rotating speed may be adjusted up or down, so that the initial rotating speed in the energy efficiency optimal mode is set as a middle value to ensure that an adjustment space exists. In the embodiment, the fan starts to operate according to the corresponding initial rotating speed after entering the corresponding operation mode, so that the rotating speed configuration of the noise optimal mode or the energy efficiency optimal mode of the air conditioning equipment can be met.
It should be noted that the fan speed control method may have a power failure memory function, that is, if power failure occurs unexpectedly, after recovery, the fan speed control method still continues to operate according to the set wind gear, the set temperature and the fan speed before power failure.
The above fan speed control scheme is described below with reference to a specific embodiment, however, it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as a limitation of the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
In this embodiment, for example, the air outlets correspond to three fans (motors) M1, M2, and M3, the wind gear setting value is n, all three fans need to be turned on, and the fan rotation speed range corresponding to the wind gear n is [ Mna, Mnb ].
Referring to fig. 2, the current temperature T1 of the area where the tuyere is located is detected, and the temperature difference Δ T between the current temperature T1 and the set target temperature T0 is calculated as T1-T0.
(1) If delta T is more than or equal to minus 5 ℃ and less than or equal to 5 ℃, determining to enter the noise optimal mode
An initial value V0 of the motor rotating speed V1n/V2n/V3n of M1/M2/M3 is Mnb, and the harmonic content of the winding current i of each motor is synchronously detected;
when the harmonic content im1/im2/im3 of the motor winding current is more than k and V0-V is more than Mna, the motor rotating speed V1n/V2n/V3n is V0-V;
when im1/im2/im3 is less than or equal to k or V0-V is less than or equal to Mna, the rotating speed of the motor V1n/V2n/V3n is fixed and is not adjusted;
k represents a harmonic safety coefficient and refers to critical harmonic content induced by electromagnetic noise of a test motor; v represents a preset rotation speed adjustment amount. The 3 motors can be independently and separately controlled.
(2) If delta T is more than 5 ℃ or delta T is less than-5 ℃, determining to enter an energy efficiency optimal mode
The motor rotating speed initial value V0 is 1/2 x (Mnb-Mna), a phase angle alpha 1/alpha 2/alpha 3 between a motor winding voltage Um1/Um2/Um3 and a current im1/im2/im3 is detected, and a corresponding power factor F1/F2/F3 is calculated according to the phase angle;
when the power factor F1/F2/F3 is less than F and V0-V epsilon [ Mna, Mnb ], the rotating speed V1n/V2n/V3n of the motor is V0-V;
when the power factor F1/F2/F3 is not less than F or
When the motor speed is fixed at V1n/V2n/V3n, the motor speed is not adjusted;
f represents the lowest power factor allowed for the motor. The 3 motors can be independently and separately controlled. It should be noted that, in order to keep the expressions of the motor rotation speed adjustment in the noise optimal mode and the energy efficiency optimal mode consistent, both the expressions are written as V0-V, actually, in the energy efficiency optimal mode, the preset rotation speed adjustment amount V may be a positive value or a negative value, for example, when the rotation speed needs to be increased, the value of V is negative, and when the rotation speed needs to be decreased, the value of V is positive.
Based on the same inventive concept, the embodiment provides a fan rotating speed control device, which can be used for implementing the fan rotating speed control method described in the embodiment. The device can be realized by software and/or hardware, and the device can be generally integrated in a controller of the air conditioning equipment, and each air port of the air conditioning equipment corresponds to at least one fan.
Fig. 3 is a block diagram of a structure of a fan rotation speed control device according to an embodiment of the present invention, and as shown in fig. 3, the device includes:
the first determining module 31 is configured to determine at least one target fan to be started according to a set wind gear of the wind gap;
a second determination module 32, configured to determine an operation mode of the target fan;
the acquisition module 33 is used for acquiring the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode;
and the adjusting module 34 is configured to adjust the current rotation speed of the target fan according to the electrical parameter.
Optionally, the first determining module 31 is specifically configured to: and determining at least one target fan which needs to be started under the set wind shield in at least one fan corresponding to the wind gap according to the preset corresponding relation between the wind shields and the starting and stopping of the fans.
Optionally, the second determining module 32 is specifically configured to: acquiring the current temperature and the set temperature of the area where the tuyere is located, and determining the operation mode according to the difference value of the current temperature and the set temperature; or, determining the operation mode according to user setting information.
Optionally, the second determining module 32 is specifically configured to: if the difference value is greater than or equal to a first preset threshold value and less than or equal to a second preset threshold value, determining that the operation mode is a noise optimal mode; and if the difference value is smaller than the first preset threshold value or larger than the second preset threshold value, determining that the operation mode is the energy efficiency optimal mode.
Optionally, if the operation mode is a noise optimal mode, the electrical parameter type corresponding to the noise optimal mode is the harmonic content of the current of the fan motor winding; the adjustment module 34 includes:
the first adjusting unit is used for reducing the current rotating speed by the preset rotating speed regulating quantity if the collected current harmonic content is greater than a preset harmonic threshold value and the difference value between the current rotating speed and the preset rotating speed regulating quantity is greater than a third preset threshold value;
and the second adjusting unit is used for controlling the target fan to continuously operate at the current rotating speed if the current harmonic content is less than or equal to the preset harmonic threshold value, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is less than or equal to a third preset threshold value.
Optionally, if the operation mode is an energy efficiency optimal mode, the electrical parameter type corresponding to the energy efficiency optimal mode is a phase angle between voltage and current of a winding of a fan motor; the adjustment module 34 includes:
the calculating unit is used for calculating the current power factor according to the acquired current phase angle;
a third adjusting unit, configured to adjust the current rotation speed by a preset rotation speed adjustment amount if the current power factor is smaller than a lowest power factor allowed by a motor and a difference between the current rotation speed and the preset rotation speed adjustment amount is within a preset range;
and the fourth adjusting unit is used for controlling the target fan to continuously operate at the current rotating speed if the current power factor is greater than or equal to the lowest power factor allowed by the motor or the difference value between the current rotating speed and the preset rotating speed regulating quantity is not in the preset range.
Optionally, the third adjusting unit is specifically configured to:
for the set wind gear, if the target fan meets the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time in the energy efficiency optimal mode and the difference value between the current rotating speed and the preset rotating speed regulating quantity is in the preset range, increasing the current rotating speed by the preset rotating speed regulating quantity;
if the target fan does not meet the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time and the difference value between the current rotating speed and the preset rotating speed regulating quantity is within the preset range in the energy efficiency optimal mode, reducing the current rotating speed by the preset rotating speed regulating quantity under the condition that the current power factor is increased relative to the power factor corresponding to the last rotating speed of the target fan; and under the condition that the current power factor is reduced relative to the power factor corresponding to the last rotating speed of the target fan, increasing the current rotating speed by the preset rotating speed regulating quantity.
Optionally, the apparatus further comprises:
the acquisition module is used for acquiring the minimum value and the maximum value of the fan rotating speed range corresponding to the set wind gear after the operation mode of the target fan is determined;
the third determining module is used for determining that the initial rotating speed of the target fan entering the noise optimal mode is the maximum value if the operation mode is the noise optimal mode;
and the fourth determining module is used for determining that the initial rotating speed of the target fan entering the energy efficiency optimal mode is a preset intermediate value if the operation mode is the energy efficiency optimal mode, wherein the preset intermediate value is between the minimum value and the maximum value.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The embodiment of the present invention further provides an air conditioning device, where each air outlet of the air conditioning device corresponds to at least one fan, and the air conditioning device includes: the fan speed control device of the above embodiment.
Preferably, the air conditioning equipment comprises at least two air inlets, and the at least two air inlets comprise an air outlet and a return air inlet.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for controlling the rotational speed of a fan according to the embodiment is implemented.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method of controlling fan speed as described in the embodiments above.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A fan rotating speed control method is characterized in that each air port of air conditioning equipment corresponds to at least one fan, and the method comprises the following steps:
determining at least one target fan needing to be started according to the set wind shield of the wind gap;
determining an operation mode of the target fan;
acquiring the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode;
adjusting the current rotating speed of the target fan according to the electrical parameter;
if the operation mode is a noise optimal mode, the electrical parameter type corresponding to the noise optimal mode is the harmonic content of the current of the fan motor winding;
and if the operation mode is the energy efficiency optimal mode, the electrical parameter type corresponding to the energy efficiency optimal mode is the phase angle of the voltage and the current of the winding of the fan motor.
2. The method of claim 1, wherein determining at least one target fan to be turned on according to the set wind profile of the tuyere comprises:
and determining at least one target fan which needs to be started under the set wind shield in at least one fan corresponding to the wind gap according to the preset corresponding relation between the wind shields and the starting and stopping of the fans.
3. The method of claim 1, wherein determining the operational mode of the target fan comprises:
acquiring the current temperature and the set temperature of the area where the tuyere is located, and determining the operation mode according to the difference value of the current temperature and the set temperature; alternatively, the first and second electrodes may be,
and determining the operation mode according to the user setting information.
4. The method of claim 3, wherein determining the operating mode based on the difference between the current temperature and the set temperature comprises:
if the difference value is greater than or equal to a first preset threshold value and less than or equal to a second preset threshold value, determining that the operation mode is a noise optimal mode;
and if the difference value is smaller than the first preset threshold value or larger than the second preset threshold value, determining that the operation mode is the energy efficiency optimal mode.
5. The method of claim 1, wherein adjusting the current speed of the target fan based on the electrical parameter in the case that the operational mode is a noise optimized mode comprises:
if the collected current harmonic content is greater than a preset harmonic threshold and the difference value between the current rotating speed and a preset rotating speed regulating quantity is greater than a third preset threshold, reducing the current rotating speed by the preset rotating speed regulating quantity;
and if the current harmonic content is less than or equal to the preset harmonic threshold value, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is less than or equal to the third preset threshold value, controlling the target fan to continuously operate at the current rotating speed.
6. The method of claim 1, wherein adjusting the current speed of the target fan according to the electrical parameter when the operating mode is an energy efficiency optimization mode comprises:
calculating a current power factor according to the acquired current phase angle;
if the current power factor is smaller than the lowest power factor allowed by the motor and the difference value between the current rotating speed and a preset rotating speed regulating quantity is within a preset range, adjusting the current rotating speed by the preset rotating speed regulating quantity;
and if the current power factor is greater than or equal to the lowest power factor allowed by the motor, or the difference value between the current rotating speed and the preset rotating speed regulating quantity is not in the preset range, controlling the target fan to continuously operate at the current rotating speed.
7. The method of claim 6, wherein adjusting the current rotational speed by the preset rotational speed adjustment comprises:
for the set wind gear, if the target fan meets the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time in the energy efficiency optimal mode and the difference value between the current rotating speed and the preset rotating speed regulating quantity is in the preset range, increasing the current rotating speed by the preset rotating speed regulating quantity;
if the target fan does not meet the condition that the current power factor is smaller than the lowest power factor allowed by the motor for the first time and the difference value between the current rotating speed and the preset rotating speed regulating quantity is within the preset range in the energy efficiency optimal mode, reducing the current rotating speed by the preset rotating speed regulating quantity under the condition that the current power factor is increased relative to the power factor corresponding to the last rotating speed of the target fan; and under the condition that the current power factor is reduced relative to the power factor corresponding to the last rotating speed of the target fan, increasing the current rotating speed by the preset rotating speed regulating quantity.
8. The method of any of claims 1 to 7, further comprising, after determining the operational mode of the target fan:
acquiring the minimum value and the maximum value of the fan rotating speed range corresponding to the set wind gear;
if the operation mode is the optimal noise mode, determining that the initial rotating speed of the target fan entering the optimal noise mode is the maximum value;
and if the operation mode is the energy efficiency optimal mode, determining that the initial rotating speed of the target fan entering the energy efficiency optimal mode is a preset intermediate value, wherein the preset intermediate value is between the minimum value and the maximum value.
9. A fan speed control apparatus, wherein each air port of an air conditioning device corresponds to at least one fan, the apparatus comprising:
the first determining module is used for determining at least one target fan needing to be started according to the set wind gear of the wind gap;
the second determination module is used for determining the operation mode of the target fan;
the acquisition module is used for acquiring the electrical parameters of the target fan according to the electrical parameter type corresponding to the operation mode;
the adjusting module is used for adjusting the current rotating speed of the target fan according to the electrical parameters;
if the operation mode is a noise optimal mode, the electrical parameter type corresponding to the noise optimal mode is the harmonic content of the current of the fan motor winding;
and if the operation mode is the energy efficiency optimal mode, the electrical parameter type corresponding to the energy efficiency optimal mode is the phase angle of the voltage and the current of the winding of the fan motor.
10. An air conditioning apparatus, wherein each air opening of the air conditioning apparatus corresponds to at least one fan, the air conditioning apparatus comprising: the fan speed control apparatus of claim 9.
11. The air conditioning apparatus of claim 10, wherein the air conditioning apparatus comprises at least two air outlets, the at least two air outlets comprising an air outlet and an air return.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a fan speed control method according to any one of claims 1 to 8.
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| CN113790518A (en) * | 2021-09-18 | 2021-12-14 | 珠海格力电器股份有限公司 | Fan control method and air conditioning unit |
| CN114165881A (en) * | 2021-12-08 | 2022-03-11 | 江苏中科睿赛污染控制工程有限公司 | New fan and noise reduction method thereof |
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